text:
A general purpose processor architecture (methods and apparatuses) that can discern all subsets of a serial data stream which fulfill an arbitrarily complex reference pattern. The invention comprises an ordered set of Detection Cells conditionally interconnected according to the reference pattern and operationally controlling one another's states through the network. The invention preferably includes a Host Interface to enable reporting of Results from a search session as well as the input and control of reference patterns and source data.
1. A general purpose, set theoretic processor comprising:
a recognition network comprising:
a state-change routing matrix;
an ordered plurality of detection cells; and
a reaction memory;
a pattern memory;
an aggregation network comprising:
an aggregation routing matrix; and
a threshold logic; and
a local clock and sequencer.
2. The processor of
load mode;
scan mode; and
test and diagnostic mode.
3. The processor of
4. The processor of
5. The processor of
6. The processor of
7. The processor of
8. The processor of
9. The processor of
10. The processor of
11. The processor of
12. The processor of
13. The processor of
14. The processor of
15. The processor of
16. The processor of
17. The processor of
18. The processor of
fixed strings of primary input components;
strings in which relative locations can have one of a number of different values;
strings in which a value or set of values can repeat zero or more times; and
strings in which one or more substrings can have one of a number of alternative values.
19. The processor of
This application claims priority to and the benefit of the filing of U.S. Provisional Patent Application Ser. No. 60/652,738, filed on Feb. 12, 2005, and the specification and any provisional claims thereof are incorporated herein by reference.
Not Applicable.
Not Applicable.
Not Applicable.
1. Field of the Invention (Technical Field)
The present invention relates to the field of digital electronic devices for recognizing specified patterns in a data stream, specifically claimed is a general purpose architecture and device for set theoretic processing.
2. Description of Related Art
In the pattern recognition field, whether in searching textual data or other form of source data, four problems persist, notably acuity, throughput, scalability and cost. Accordingly, these are the measures of effectiveness for any new technology in this field.
Acuity is measured as the sum of False Positives and False Negatives in the results of a scan. False positives occur when the scan results in irrelevant patterns. False Negatives occur when the scan fails to identify patterns that are, in fact, relevant. The ideal pattern recognition device will not make such errors. The next best device will enable a user to control the amount of error as well as the ratio of False Positives to False Negatives and to trade off acuity vs. throughput and/or cost for each user situation.
As to scalability, pattern matching involves identifying symbols and syntax identical to the user's expression of interest. Pattern recognition goes further by enabling the specification of a class of equivalent terms and by aggregating all qualifying instances. This distinction became important as search technology progressed from text search to imagery search to detection of malware for cybersecurity and for detection of evolving patterns in biocomplexity informatics. Accordingly, minimizing False Positives and False Negatives may entail reference patterns that specify upwards of 100 terms each averaging 10 features. The vaunted Google search engine experienced an average query of 2.3 terms, circa 2004. Modern recognition devices should have the capacity to compare upwards of 1000 features to the source data stream and be scalable to 1 million features. Other dimensions of scalability include implementation of a personal-scale device to a federated system of millions of devices throughout the World Wide Web.
Throughput is the speed at which the source data is examined and results reported. The typical measure of throughput is characters per second. Constant or at least predictable throughput is best, not dependent on the complexity of the reference pattern nor the number of recognitions per unit time.
Cost is the total cost of ownership of a search episode regardless of how the costs are allocated. For example, a user pays nothing for a Google search episode but somebody is paying for the MIPS (millions of instructions per second), bytes and baud that are used to accomplish the search. Cost includes the preprocessing of source data as well as the actual search episode.
Starting approximately in the mid-1900's, various strategies have sought to improve performance in one or more of the measures by leveraging technologies and innovating architectures. The state of the art is still far from realizing, simultaneously, specifiable acuity, throughput at the speed of silicon, scale from single user to federated users and cost levels that small and medium enterprises and even individuals can afford.
The following paragraphs summarize the field to date.
The general purpose computer, designed to perform arithmetic, has been used since the 1950's for comparison of digital data in the form of characters, character strings and combinations of character strings. A straightforward program can utilize the memory and CPU (central processing unit) to input a reference character then compare it, sequentially, to multiple characters of various kinds as presented by a source data stream. The presence in the source data stream of a matching character can be flagged for subsequent reference. More than one such character may be found and flagged and more than one instance of any specific character may be found and flagged. Each such operation consumes several clock cycles of a modern microprocessor.
If the reference is a string consisting of multiple characters in a specific sequence, i.e., representing a word of text, or a music melody or a genomic pattern, then a more complicated program is required. Character-level comparison proceeds as before then the interim results are stored for subsequent processing to determine whether the characters that qualified are in the sequence required for a word-level match. This is known as the combinatorial explosion problem because the number of machine cycles increases as the square of the number of conditional matches. Such operations typically consume thousands of clock cycles and there is no upper limit.
If the reference consists of a phrase, e.g., a string of words in a specific order, then the program, using recursion, is only somewhat more complicated but the combinatorial explosion can become even more dramatic and can consume billions of clock cycles. Although grid configurations of megaflop processors can supply the clock cycles the expense of the device quickly becomes prohibitive and throughput can be in the range of only a few characters per second.
The dismal acuity exhibited by pattern matching machines to date stems from attempts to avoid the combinatorial explosion problem. Most text applications use key words to surrogate the source data. Then searches compare the reference pattern to only the key word file, not to the actual text. This approach invokes the well known problem of retrieving citations that are irrelevant (false positives) thus incurring waste and cost. A not so well known but worse outcome is that are truly relevant patterns in the data being scanned are not recognized (false negatives) because the content was not represented with sufficient fidelity by the key words used.
Attempts to extract meanings from text are frustrated by the complexity of the problem but more so by the indexing to terms as noted in the previous paragraph. Implementations of pattern recognition have been demonstrated with pre-processing and post-processing software, such as statistical clustering and Latent Semantic Indexing. In essence these seek to overcome the limitations inherent in indexed or censored text streams by further processing of the term matches found by the hardware. This approach to recovery of meanings in the censored text can never overcome the limitations imposed by the censoring in the first place.
SIMM, SIMD and similar hardware CPU embellishments have been invented for data flow applications. These have demonstrated speed improvements in the single digit range but also increased cost.
Supercomputer configurations and more recently grid configurations of microprocessors have been programmed for set theoretic processing both for Very Large Data Base situations and genomic research. Cost inhibits most potential users from this option.
In the limit, the basic Von Neuman stored program computer simply cannot exhibit the speed/cost ratios available with other implementations.
The special purpose processor category contains many examples of prior art. Early examples include the General Electric series;
Being complex logic devices, special purpose processors are not only expensive to produce (product cost exceeding $10,000) but also subject to failure rates that frustrated operational users. Further, the designs were neither scalable nor extensible. The method of performing character/character set comparisons limited them to pattern matching rather than pattern recognition.
Being ever more complicated, logic devices using parallelism for throughput in various string pattern matching scenarios each exhibited cost limitations were limited in scalability as well. Also, precise internal timing of the logic circuits made it nearly impossible to re-implement them as semiconductor technology advanced.
Associative Memories and Contents Addressable Memories have been used to reduce the number of clock cycles required to fetch data into registers. While improving performance these approaches do not reduce costs and none to date have yielded significant improvements regarding the acuity measure of effectiveness.
Neural Net based recognizers have been used for string pattern matching in order to implement rapidly adaptive reference patterns. These have proven effective in specific applications such as email spam signature identification and adaptive tracking but do not exhibit the speed and performance for general application.
Application-specific devices have been devised for pattern matching of 2D and 3D images, but do not have the Boolean, semantic and set theory logic.
Systolic Arrays use pulse propagation through preformed switching networks to parallelize logical relationships without resorting to the von Neumann paradigm. These are much faster and less expensive than sequential processors. Inventions and embodiments to date have been application specific and have not allowed sufficiently quick reconfigurations of the switching network.
The more particularized field of the present invention started with machines that detected Match or No Match, one term at a time. Next came full Boolean operators across collections of terms. Then the addition of Don't Care logic to the Match, No Match choices allowed detection of partial matches. Delimiters enabled detection of syntactic clues such as end of word, end of sentence, end of paragraph, end of section, end of file, end of record, etc. Next came detecting strings of terms (e.g., phrases). Throughout was the presumption that the search would be composed and expressed by humans in the form of queries. Search engines or adjunct software did not greatly aid how humans formulated queries. Linguists created very sophisticated preprocessing and post processing software but these did not make significant improvements in acuity, throughput, scalability or cost, let alone improving all at the same time. The field of artificial intelligence paralleled the search engine field but without significant cross-disciplinary sharing.
The field started with machines that detected Match or No Match, one term at a time. Next came full Boolean operators across collections of terms. Then the addition of Don't Care logic to the Match and No Match choices allowed detection of partial matches. Delimiters enabled detection of syntactic clues such as end of word, end of sentence, end of paragraph, end of section, end of file, end of record, etc. Next came the capability to detect strings of terms (e.g. phrases).
Throughout was the presumption that the search would be composed and expressed by humans in the form of queries. Search engines or adjunct software did not greatly aid how humans formulated queries. Meanwhile, linguists created very sophisticated preprocessing and post processing software but these did not make significant improvements in acuity, throughput, scalability or cost, let alone improving all at the same time.
Many of the advancements were paced by Moore's price/performance law in the semiconductor field. The field of artificial intelligence paralleled the search engine field but unfortunately without significant cross-disciplinary sharing. The advent of knowledge management in the 1990's made many more people aware of lexicons and taxonomies, the [then] means of expressing the relationships among entities in addition to describing the entities. The advent of semantic web development in 2001 intended to enable computers to interchange data based on the meaning of the data instead of just on its location in a format has fostered expressions of knowledge models as formal ontologies.
Set theory has proven useful for making assertions about relationships. The advent of digital image patterns search has advanced its use considerably. Currently, set theoretic expressions are as prevalent as Boolean logic and algorithmic operators. This has prompted distinctly new machine architectures featuring systolic arrays and data flow-facilitation examples. Now interest increasing from facilitation of computer system data interchanges to facilitation of human knowledge interchanges and to facilitation of interchanges among diverse, distributed systems of humans. Applying digital devices to the disambiguation of human communications is the next wave in this field. The astounding complexity of this challenge motivates development of a general purpose machine that can execute a variety of such expressions. The present invention provides such a method and apparatus.
In order to locate all of the data objects relevant to a given referent and only those objects it is necessary to overcome the heterogeneity of the subject data. Heterogeneity exists on two levels. The first level for digital text is transcription variation such as differences in spelling, spelling errors, typographical errors, punctuation differences, spacing variation, the presence of "special" bytes used to control the display or transmission medium but which themselves carry no meaning, and recently, obfuscation characters intended to spoof spam detectors. A popular example of the latter is:
Cognates in other types of digital data are, for example: DNA spelling errors, Background noise, and Varying pronunciation.
The second level of heterogeneity is the semantic level. Humans are gifted inventors of different ways of expressing the same idea. This means that for every component of a referent many variations may be possible (varying sentence and paragraph structuring, and many figures of speech (synonyms, allegory, allusion, ambiguity, analogy, eponym, hyperbole, icon, index, irony, map, metaphor, metonym, polysemous meaning, pun, sarcasm, sardony, sign, simile, synecdoche, symbol, token, trope) and class, subclass, idioms, and super class words and expressions).
Accordingly, rather than looking for the occurrences of a word or phrase, or even a few words or phrases, in a body of text, Ashby's Law of Requisite Variety (for appropriate regulation the variety in the regulator must be equal to or greater than the variety in the system being regulated) demands a way of finding all of the expressions equivalent to a set of referents. A responsive machine must be able to process set theoretic operators as well as Boolean operators and semantic operators such as precedence and aggregation. In this document the set of strings equivalent to a referent is called an equivalence class. A description of the members of an equivalence class is called a Referent Pattern.
Acuity is achieved by providing a means to scan a data stream for content fulfilling Reference Patterns of sufficient selectivity and sensitivity to perceive just the digital objects of interest. Simultaneously, throughput, scalability and cost must be achieved as well.
The present invention is of a general purpose, set theoretic processor (and concomitant method) comprising: a recognition network comprising a state-change routing matrix, an ordered plurality of detection cells, and a reaction memory; a pattern memory; an aggregation network comprising an aggregation routing matrix and a threshold logic; and a local clock and sequencer. In the preferred embodiment, the processor operates in modes of operation comprising load mode, scan mode, and test and diagnostic mode. The state-change routing matrix provides a reticulum of latent connections from any set of source detection cells to any set of successor detection cells. A reference pattern establishes actual pathways through the state-change routing matrix from source to successor cells. The plurality of detection cells comprises 1024 or more cells, wherein each of the detection cells is associated with one column of the pattern memory, each of the detection cells is a finite state machine having two states, and the latent reaction of each of the detection cells to any given input value is specified by the contents of the reaction memory and whose manifest reaction is determined by the cell's current state acting on its latent reaction. The pattern memory is conventionally addressed in load mode and test and diagnostic mode with one word of at least 1024 bits being written to or read from a multiplexer/de-multiplexer at a time; and in scan mode four words of at least 1024 bits each are accessed in parallel to generate in parallel two results words (detection cell response and next state) of at least 1024 bits each. Reactions of all detection cells are determined simultaneously, in parallel. The threshold logic comprises a plurality of group threshold logic cells, wherein the aggregation routing matrix provides potential connections between each the detection cell and each group threshold logic cell, a reference pattern establishes actual connections between detection cells and group threshold logic cells, a reference pattern determines whether an output from the detection cell it connects to a group threshold logic cell will be transmitted to the group threshold logic cell on every occurrence or only once, the group threshold logic cells are initialized at the beginning of a scan mode, and each of the group threshold logic cells has a 1 bit output. All processing is accomplished on source data provided to the processor in one systolic cycle per source data input. The processor recognizes strings in source data that fulfill a reference pattern specification of a set of fixed and variable component substrings comprising one or more of fixed strings of primary input components, strings in which relative locations can have one of a number of different values, strings in which a value or set of values can repeat zero or more times, and strings in which one or more substrings can have one of a number of alternative values. The source data is any of the following: nucleotide sequences; amino acid sequences; speech pattern sequences; lexicographic sequences; signal analysis sequences including electromagnetic, optical, acoustic or seismic data sequences; sequences derived from a graphic image including x-ray images, CAT scan images, MRI images, television images, fingerprint images, and photographic images; pixel location data; law enforcement related sequence data including fingerprint data, voiceprint data, and genetic profile data; and sequence data comprising gene expression profiles.
Bandwidth is necessary for both acuity and throughput. A primary object of the invention is to provide a 10-fold to 100-fold advancement with respect to current architectures if implemented in the same technology. A principal approach is to trade space for logic by using a random access memory with minimal added logic and control functions.
Another object of the invention is to minimize process steps, using systolic techniques wherever possible, and to trade space for logic by using random access memory with minimal logic and control functions.
A further object of the invention is to provide an agile architecture featuring a framework and module arrangement that can accommodate expansion or contraction of throughput, repertoire and level of language without affecting existing capabilities and behaviors.
Other objects of the invention include:
Advantages of the invention include: (1) Enabling user control of acuity through choices about the extent and content of the reference pattern (RP); (2) Enabling user confidence in results by providing a device integrity check that may be run at any time; (3) Enabling user invocation of not only variations on a reference word (e.g., plural forms) but also invocation of equivalent words and phrases (e.g., cat, feline, Tabby); the preferred embodiment is 1024 cells ) but up to one million cells are consistent with VLSI implementation media circa 2005.
The invention provides fungibility advantages, with a cost low enough to have this device beside every CPU and every Read Head thus leveraging Metcalf's Law. There is a low cost of ownership through a combination of low cost of device, configurability as a co-processor in a general purpose computing system. Thanks to computer preprocessing of source data not being required, adjunct software complexity is minimized, and results in one systolic cycle per input.
High scalability accommodates the span of reference patterns and volumes of data to be searched. An objective is a 10-fold relaxation of limits on span and volume over current technology. A principal approach is to abstract the semantic and set theory logic and unify them in a highly parallel, extensible architecture.
Other objects, advantages and novel features, and further scope of applicability of the present invention will be set forth in part in the detailed description to follow, taken in conjunction with the accompanying drawings, and in part will become apparent to those skilled in the art upon examination of the following, or may be learned by practice of the invention. The objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.
The accompanying drawings, which are incorporated into and form a part of the specification, illustrate one or more embodiments of the present invention and, together with the description, serve to explain the principles of the invention. The drawings are only for the purpose of illustrating one or more preferred embodiments of the invention and are not to be construed as limiting the invention, and include the reference numerals described below. In the drawings:
The present invention relates to the field of digital electronic devices for recognizing specified patterns in a data stream specifically claimed is a general purpose architecture and device for set theoretic processing. This type of processing arises in many different fields of endeavor, but can be understood more easily in terms of a search of an alphanumeric data base, not to locate all the occurrences of a particular word or phrase, but to locate all of the data objects (documents, images, DNA base sequences, audio clips) relevant to a given issue (referent) and only those data objects.
As shown in the drawings for purposes of illustration, the present invention is of a high bandwidth general purpose set theoretic processor (GPSTP) capable of perceiving complex patterns in a digital symbol stream at data rates orders of magnitude faster than conventional computers implemented in the same semiconductor technology (feature size and gate speed). The processor is capable of implementation on a single semiconductor chip. The processor is unaffected by the meaning of the symbols provided that the Reference Pattern is formulated assuming the same symbol set as that of the symbol stream. The processor will perform equally well with text (without regard to code- ASCII, EBCDIC, BCD), gray-scale pixel values, DNA sequences, digital audio, or any other digital information.
The following definitions are used in descriptions below, but numerical values are not intended to be limiting (e.g., the number of bits in the columns and rows of Pattern Memory):
In order to locate all of the data objects relevant to a given referent and only those objects it is necessary to overcome the heterogeneity of the source data. Heterogeneity exists on two levels. The first level in the case of digital text is transcription variation:
The second level of homogeneity is the semantic level. Humans are gifted inventors of different ways of expressing the same idea. This means that for every component of a referent many variations may be possible (varying sentence and paragraph structuring, and many figures of speech (synonyms, allegory, allusion, ambiguity, analogy, eponym, hyperbole, icon, index, irony, map, metaphor, metonym, polysemous meaning, pun, sarcasm, sardony, sign, simile, synecdoche, symbol, token, trope) and class, subclass, idioms, and super class words and expressions).
Accordingly, rather than looking for the occurrences of a word or phrase, or even a few words or phrases, in a body of text, the aforementioned acuity objective demands a way of finding all of the expressions equivalent to a set of referents The set of strings equivalent to a referent is called an equivalence class. A specification of the members of an equivalence class is called a Reference Pattern.
The purposes of the present invention are; to provide a means to scan a data stream for content qualified by Reference Patterns, to enable users to specify referents of sufficient selectivity and sensitivity to perceive just the digital documents and other digital objects of interest, to provide the bandwidth to do so at useful speeds, and to minimize the cost of a device that satisfies all these.
The invention takes a generalized approach. Rather than dealing with character variation for spelling differences, extra characters, missing characters, variable numbers of repeated characters; it employs a (byte) with that can be configured to deal any one or combination of these challenges as special cases. The use of "byte" in the previous sentence rather than "character" is deliberate and important to understanding the invention. A byte value is a digital object consisting of eight binary digits (represented variously as open and closed switches, high voltage low voltage, etc.) interpreted as zeros and ones, "ON" and "OF", "True" and "False", "Yes" and "NO". The eight bits taken together as a byte are interpreted as a binary number with decimal equivalent between 0 and 255, as a symbol for a character using a particular coding scheme (anciently called a sort sequence as a legacy of punched card sorters), as a value in a gray scale, a sound, a musical note. The invention operates on digital objects (for the embodiment being discussed, bytes). It is neutral with respect to what the digital objects represent. It is also generalized with respect to the number of bits in a digital object; a different embodiment using the same principles and structure can be realized for two bit objects (two bits are all that are needed to represent the four bases—A, C, G, T—in DNA sequences, e.g.).
The Detection Cell is a deterministic finite state machine. Its behavior is determined by the current byte in the input stream, by its current state, and by the contents of its reaction memory (state transition and output tables). It has two possible current states "ON" and "OFF" ("Enabled" and "Disabled" will be used as alternate words for states and "Enable" and "Disable" for "Turn ON" and "Turn Off" or "set to the "ON" state, etc., to avoid clumsy construction.). A Detection Cell's Reaction Memory has a location for each possible byte value. It is from this property that generality with respect to byte interpretation and transcription variation derives. With respect to interpretation, a Detection Cell's Reaction Memory entry for a given byte value depends on the meaning of that byte value in the coding scheme of the input. To detect the letter "P" in an EBCDIC input stream one Reaction Memory entry will be used. If the input stream is ASCII or "Tilt and Swivel" code, different entries will be necessary. To convert Reaction Memory entries from one coding scheme to another, it is only necessary to reorder them. If the coding scheme of an input stream is either unknown or mixed, different sets of detectors can be setup for different coding schemes to determine which is used or to scan for content in mixed streams. To deal with transcription variations, an individual detector can be configured to detect any member of a set of input bytes (any vowel) for example to overlook the common error of vowel substitution. Another Detection Cell can be set to detect any word boundary character (that is, the byte values corresponding to punctuation spaces, and other characters that separate words). A Detection Cell configured to detect a character in a word can also be configured to ignore formatting bytes such as line-feed and carriage return bytes in order to be able to recognize words that start on one line and end on another; and another Detection Cell configured to detect word boundary bytes to include formatting bytes in the list of bytes to which they will respond. To deal with variable white space a single Detection Cell can be configured to accept an unspecified number (zero or more) of word boundary bytes followed by the first byte of a word.
Shown in
As shown in
The Pattern Memory stores a Reference Pattern of 220 bits (1024×1024) that determine the response of the device to patterns in the input stream. The Pattern Memory is dual structured. As shown in
Line 3 is the data path between the Host Device Interface 16 and the Multiplexer/de-Multiplexer. It is used to load Reference Patterns into the Pattern Memory. Line 4 is used to read the contents of the Pattern Memory. Line 9 is used for the Host Device Interface and Sequencer 13 to communicate commands and status. Line 20 is used by the Sequencer to control the Multiplexer/de-Multiplexer. Line 17 is a row select/enable line (one of 1024) used to select the row specified by the binary value of the 10 bits supplied by line 16. Line 16 is used by the Sequencer to direct Reference Pattern data to the correct row and to specify which row is to be read in a Read from Pattern memory operation. Line 19 is used by the Sequencer to command the Pattern Memory (in load and diagnostic modes) to write to and read. Line 18 is used by the Sequencer to set the mode (Load, Diagnostic, Scan) of the Row Address Decoder 10.
The second Pattern Memory structure, the Scan mode structure, is shown in
In Scan mode the three 256×1024 bit partitions are treated as three separate conventional memories accessed simultaneously with the same address, the binary value of the input byte from the scan stream. On each input byte cycle one 1024 bit row is read from each of the three memories which are accessed independently using separate sections of the Row Address Decoder so that 3×1024 bits are accessed on the same clock cycle. The remaining 96×1024 bits in the Recognition Network and the 160×1024 bits in the Aggregation Network are not used conventionally in Scan mode. The circuits that use these memory partitions access the memory bits directly, not using the bit lines by which they are accessed in the load and diagnostic modes.
As shown in
Detection Logic Method
To determine whether a byte in a stream satisfies a qualifying condition, this invention does not compare the byte to a stored byte value. Instead, the invention employs a method of representing qualifying conditions called counter representation. To understand counter representation consider the following:
Suppose it is desired to detect the occurrence of an uppercase letter "L". Counter representation represents the "L" using the binary value of the digital symbol 01001100B=76D to write a 1 into a response memory (256×1 bits).
Term Logic Method
To detect patterns longer than a single byte a number of said Detection Cells can be strung together in a linear arrangement with the output of each Detection Cell connected to its immediate successor. These Detection Cells, in addition to a response memory are provided with an additional bit of memory to indicate the state ("OFF" or "ON"). In
Presenting the string "Hope and Love" to all four Detection Cells (each byte presented to all Detection Cells simultaneously), none of the Detection Cells would respond (output a 1) until the "L" is presented, at which point the output of DC1 enables DC2 (sets its state to "ON" by writing a 1 into its state memory). Similarly, as "o", "v", and "e" are presented the detection is propagated from one Detection Cell to the next, until detection of the whole string is indicated by the output of DC1. (The preferred embodiment type of memory used for Detection Cell states allows the current contents of the memory to be read on the same clock signal as that used to write a new value, so detection propagation does not propagate prematurely.) Since it enables the Detection Cell's successor when it's value is one, this 256×1 memory is called the Successor-Enable Memory (MSi) and its output for an input byte b is denoted MSb,i. The state bit is used to control output from the Detection Cell. The Successor-Enable response of DCi for an input byte b is given by the expression (the "ˆ" denotes the logical AND operator):
Note that the output of each Detection Cell is written into its successor's state memory even if it is zero. This has the effect of placing the successor Detection Cell in the "OFF" state for the next input byte. (Again, because of the built in delay in this type of memory if a Detection Cell is "ON" when a byte is presented it will output the value at the location addressed by that byte. The state value relayed from its predecessor sets its state for the next input byte.) Detection Cells being disabled (state set to "OFF") between each bytes is a desirable, other wise, "Lark and dove" would be erroneously detected: the "L" in "Lark" enabling DC2 that then picks up the detection propagation with the "o" in "Dove".
But if DC1 is disabled between input bytes, the initial "L" will only be found if the first input byte is an "L". Initial Detection Cells could be treated differently from the others, but for reasons that will be apparent below treating all Detection Cells the same is highly desirable as special treatment for initial Detection Cells would diminish the generality of the device. So, a general mechanism for keeping an initial Detection Cell enabled is needed, a mechanism that can also be used to meet other requirements.
Such a mechanism can be derived from counter representation as well. If all Detection Cells are provided with an 256×2 response memory instead of 256×1, the additional bits can be used by an initial Detection Cell to keep itself enabled; thus, this 256×1 memory is called the Detection Cell's Auto-Enable Memory and is denoted MAi. Like the Successor-enable Memory, its output is controlled by the Detection Cell's state Si, and its Auto-Enable output is given by the expression
A Detection Cell's Auto-Enable Memory can also be used selectively to meet other needs (such as precision wild cards and ignoring missing or extra bytes, etc., as will be addressed later.) To keep an initial Detection Cell in the "ON" state all 256 of its Auto-Enable bits are set to 1. Each input byte addresses both the Successor-Enable response and the Auto-Enable response at the same time. A Detection Cell's auto-enable bit together with its predecessor's successor-enable bit enable the Detection Cell if either is a 1. The next state of Di is given by the expression (the "v" denotes the logical OR function):
In the simple cases discussed above it is sufficient to treat the Successor-Enable output of the final Detection Cell as a reaction to the conditions expressed in all of the Detection Cells. But the objective of the present invention requires that it be able to scan the contents of a data stream for the presence of combinations of many pattern elements at once. A pattern will involve many times the number of Detection Cells discussed so far, in some cases many hundreds or thousands of Detection Cells. That is to say any final Detection Cell may be followed immediately by the initial Detection Cell for the next set. Thus, a mechanism is needed for the reaction that is separate from the Successor-Enable response and Auto-Enable memories. The response memory Detection Cell is extended to 256×3 bits. The third bit is called the Reaction bit and the third memory column, the Reaction Memory. The column is denoted MRi and the Reaction bit corresponding to byte b is denoted MRb,i. MRb,i=1 for Detection Cell if the byte b can be a final byte value for a string of Detection Cells. As with the Successor-Enable response and Auto-Enable memories the Detection Cell's State Si controls the Detection Cell's Reaction output that is denoted:
A data source input character 'b' may be an initial value for one string, a final value for another string, a sustaining value for yet another and an irrelevant character to another.
Some definitions before proceeding: A Detection Cell Di comprises a one bit State (Memory) Si; a 256×3 bit Response Memory Ti, comprising a 256×1 Successor-Enable Memory MAi, a 256×1 Auto-Enable Memory MAi, and a 256×1 Reaction Memory MRi; and circuits that yield outputs:
The three bits MRb,i, MSb,i, MAb,i,=Ti is called a Reaction Triple. A Detection Cell DCi is said to be "programmed" or "configured" when its Response Memory is loaded and it's State Si is initialized. While the bit pattern that determines the Detection Cell's behavior (called a Feature) is distinct from the Cell itself, they are so intimately related that the terms will be used interchangeably in this document, except where the distinction is germane. A Simple Term is a contiguous set of Features the first of which is initialized to the "ON" state, will to remain "ON" for any input byte, and will enable its immediate successor in response to at least one input byte value; the last of which is initialized to the "OFF state, iwill remain "Off" unless enabled by its immediate predecessor, will acknowledge recognition of the Term when it is in the "ON" state in response to a term ending input byte value by sending a 1 to the Aggregation Network; and whose interior features are initialized to the "Off" state, when "ON" will detect at least one input byte value and in response enable their immediate successors, and will return to the "OFF" state unless enabled by their immediate predecessors. In less formal terms, a Term's first Feature is always alert for an input byte that begins a string of interest. It responds to such a byte by enabling its neighbor (immediate successor) for the next input byte cycle. (Now both the first and second Features are enabled.) While the second feature is "ON" it responds to an input byte in its list of satisfying bytes by enabling its neighbor for the next byte input cycle (and "going back to sleep"). This "wave" of detection is thus passed from Feature to neighbor until the Term's last Feature is enabled. If a satisfying byte is the next input, an input string satisfying the Term has been recognized and the Term's last feature sends a 1 to the Aggregation Network.
The Feature is the fundamental unit of detection and the Term is the fundamental unit of meaning. A Feature is said to detect a byte; a detected byte is said to satisfy the feature's detection criteria or to trigger its response. A string is recognized by a Term, a recognized string is said to satisfy the Term's qualifying criteria, or simply to satisfy the term.
A formulaic description of an individual Detection Cell is shown in
If MRb,i=1 then a Term has been recognized and the 1 is acted on by the Aggregation Network; if MAb,i=1, then the Detection Cell is enabled for the next input byte cycle; if MSb,i=1, the Detection Cell's successors (neighbor and other Detection Cells that may be enabled by DCi) are enabled for the next byte input cycle. If the cell is "Off" Si=0 and:
In order to recognize strings differently expressing equivalent meaning a combination of large capacity (large numbers of Detection Cells) and more complex Terms are required. Strings with the same meaning as "dog chases cat" may be expressed as "poodle pursues puma", for example. And substitutions can be made for any of the three words in the string and still produce a string that will be of interest to a person with respect to some body of text. Depending on the robustness of the user ontology there may be dozens of substitutions for each word. If each noun is varied through 12 alternatives and the verb is varied through 5, the number of different strings that might be of interest would be 770. If string variants' average length is 20, more than 14,000 Detection Cells would be required using Simple Terms. The Complex Term method used by the invention, however, reduces that number dramatically to fewer than 600.
The meaning of three words need to be clarified before proceeding; they define elements that correspond to the beginning, middle, and end of the Simple Term.
A Term Prefix is a set of contiguous Features such that for the first DCf:
And for subsequent Features DCi:
A Term Infix is a set of contiguous Features DCf such that:
And for that for the last DCL:
Accordingly, a Term can be re-defined as one or more Term Prefixes Followed by One or more Term Infixes followed by one or more Term Suffixes. Simple Term omits the "or more". A Complex Term includes at least one of the three. A Complex Term, like the "dog chases cat" example can have more than one beginning, middle, and end.
The method the invention uses to realize the Complex Term is the State-Change Routing Matrix. The State-Change Routing Matrix
The SiˆMSb,i 30 output of each Detection Cell DCi (as potential Precursor) is connected to each of 10 SRC's (SRC1,i-SRC 1 0,i) 32, this means that any enabled Detection Cell that is triggered by an input b will output a 1 to all 10 of these SRC's 32. Similarly, each column of 10 SRC's (SRC1,i-SRC1 0,i) 32 is connected by lines 31 to a Detection Cell DCi (as potential Successor). These lines carry USEi, the disjunctive sum of successor enable (SpiˆMSb,pi) 30 outputs of DCi's Precursors. USEi=1 whenever any of the DCi's Precursors (SpiˆMSb,pi)=1. In DCi, Si=USEi v (SpiˆMAb,i) becomes DCi's new state. This state change (for all Detection Cells) occurs on the "trailing edge" of the same clock C 33 as is generation of output to the Aggregation Network (
The State-Change Routing Cell 32 provides the method of connecting Term Prefixes to Term Infixes and Term Suffixes as well as from Term Infixes to Term Suffixes, thereby providing Enabling Propagation Paths from Precursor to Successor. It is a hub controlling Successor Enable signals from the Detection Cell as Precursor via Enabling Propagation Paths to Detection Cells as Successors.
The formulaic description of an individual State-Change Routing Cell indicated by reference numeral 39 is shown in
It is stressed here that phrases like "implicit Enabling Propagation Path between Detection Cells and their 'right' neighbors" refer to this explication and not to the device itself. The apparatus is completely general; its behavior is determined by the contents of its pattern memory. Responses of Detection Cells are determined by the contents of their Reaction Memories; their interaction with other Detection Cells is determined by the values of delay flip-flop memories that control switches in the State-Change Propagation Matrix (and these switch memories like all cells in the invention are part of the Pattern Memory.
One of the important benefits of the State-Change Propagation Matrix architecture is that it provides a method for tolerating manufacturing errors. The number of flaws in a semiconductor is proportional its number of gates. The more gates, the smaller the feature size, the greater the number of flaws. Flaws are a serious cost driver either in the form of reduced yield or remediation cost. But the columnar organization of the pattern memory of the invention allows chips to be used even with multiple, possibly many flaws. All of the memory (1024 bits) associated with a Detection Cell is a column of the Pattern Memory and all of the "additional" gates (those not used for reading and writing whole memory rows) associated with a Detection Cell are co-located with the Detection Cell's memory column. Each Detection Cell and its memory column is a relatively independent module. If it contains flaws and there is a means to bridge between its "left" and "right" neighbors it can be ignored.
Aggregation Method
The Aggregation Network organizes term recognition results into a coherent whole. As shown in
Aggregation Routing Matrix
The Aggregation Routing Matrix as shown in
As shown in
Interpretation of the threshold differs depending on the value of the LNL. If LNL=0 then the threshold has logic meaning, of LNL=1, the meaning is numeric. If, for example the results of ten Terms are routed to the same GTL, and its threshold is 6, the meaning of its output is the truth value of "Six of these ten terms are present." If TL=0, "Six of these ten terms are present." is false. If TL=1, "Six of these ten terms are present." is true. If the threshold is 1, the meaning of the TL value is equivalent to a disjunctive sum over the scan outcomes of the ten Terms, TL=1 means "At least one of the ten Terms is satisfied." If the threshold is 10, it has the meaning of the conjunctive sum over the scan outcomes of the ten terms, that is, "All of the Terms are satisfied."
If an individual Term routed to a GTL has its LNL=1 and the GTL has a threshold of n, the meaning of the TL is the truth value of "This Term has been satisfied at least n times".
Boolean Logic
Up to thirty Threshold Logic binary digits are output to the Host (via the Host Device Interface). For many applications it may be adequate to have the Host dispose of the 30 bit result unaided. However, it may also be useful, especially with regard to performance to reduce the 30 bit result to a single yes/no one bit result, to determine whether the subject digital object "is in the set of items of interest" or not. This can be done with the use of a 1 GB random access memory. In preparing the Reference Pattern, the Host also processes a Boolean logic expression provided by the user and the user's software. If n GTL's are used the expression will have n logic variables. By assigning each of the logic variables to a binary digit in an digit binary variable and by incrementing the binary variable fro 0 to 2n−1, all combinations of truth values of the logic variables can be generated. Evaluating expression for every combination produces all of the possible truth valuations of the expression. Using the numerical value of the n-bit binary variable for each combination as an address the 1-bit truth value for that combination can be stored in the random access memory. Then in Scan mode the output of the Threshold Logic is presented to the address lines of the random access memory to read the pre-calculated truth value for that combination of TL values.
The foregoing discussion has been primarily directed at the method of the invention. The following describes more details of the apparatus that are pertinent to achieving the high throughput and low cost.
Detection Cell Detail
Details of the Detection Cell are shown in
State-Change Routing Cell Detail
As shown in
The values of all six of these memory cells are written in the Load mode and do not change in the Scan Mode. The State-Change Routing Matrix is static, though the traffic over it is dynamic.
Aggregation Routing Cell Detail
The Aggregation Routing Cell, ARCj,i, shown in
The Group Threshold Logic GTLj shown in
Interpretation of GTLj's threshold differs depending on the value of the LNL setting of ALCj,i (0≦i≦1023). If the LNL's=0 then the meaning is logical; if LNL=1, the meaning is numeric. If, for example the results of ten Terms are routed to the same GTL, and its threshold is 6, the meaning of its output is the truth value of the first order logic proposition "Six of these ten terms are present." If TL=0, the truth value of the proposition "Six of these ten terms are present." is false. If TL=1, the truth value of the proposition "Six of these ten terms are present." is true. If the threshold is 1, the meaning of the TL value is equivalent to a disjunctive sum over the scan outcomes of the ten Terms, TL=1 means "At least one of the ten Terms is satisfied." If the threshold is 10, it has the meaning of the conjunctive sum over the scan outcomes of the ten terms, that is, "All of the Terms are satisfied."
If an individual Term routed to a GTL has its LNL=1 and the GTL has a threshold of n, the meaning of the TL is the truth value of "This Term has been satisfied at least n times".
The invention is further illustrated by the following non-limiting examples:
Although the invention has been described in detail with particular reference to these preferred embodiments, other embodiments can achieve the same results. Variations and modifications of the present invention will be obvious to those skilled in the art and it is intended to cover in the appended claims all such modifications and equivalents. The entire disclosures of all references, applications, patents, and publications cited above are hereby incorporated by reference.
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Rick Perry's Texas A&M Fs in Science & Economics | Poor, Poor Evangelicals
Truth and Lies
Rick Perry
Rick Perry calls global warming un unproven, costly theory LA Times
Yesterday in New Hampshire, Rick Perry told his audience 'Yes, our climate's changed — they've been changing ever since the Earth was formed.' Apparently, Rick Perry cited not one academic source in his charges:
"I don't think, from my perspective, that I want America to be engaged in spending that much money on what is still a scientific theory that hasn't been proven, and from my perspective is more and more being put into question."
One of his questioners Jim Rubens, a Republican from the village of Etna who works as a consultant for the Union of Concerned Scientists, prefaced his question reading a passage from Perry's book 'Fed Up!' in which he asserts that global warming is 'a contrived phony mess that is falling apart under its own weight.'
Rubens then asked Perry that he rejected both "observed scientific data" and the National Academy of Sciences on the issue, "doesn't that call into question the entire science discovery process that is the basis for America's status as an advanced technological society?"
'You may have a point there', was Perry's reply.
Rubens said later in an interview that Perry was promulgating inaccurate information that could damage the reputation of the National Academy of Sciences. "I hope he would review the temperature data, and say, 'I was wrong; it is getting warmer.' "
While the majority of Republican presidential election do not believe in global warming — or science in most cases — Rick Perry's views put him at odds with Mitt Romney. GOP candidate former Utah Gov. Jon Huntsman Hr. has come under fire for his support of climate change initiatives.
Protesters quiz Perry sharply in NH The Boston Globe
Having read through about 10 recaps of yesterday's Rick Perry campaign through New Hampshire, it does seen that hecklers outnumbered supporters — or even folks who turned out to meet the candidate.
"How old do you think the Earth is?" asked a little boy innocently as his mother hovered behind him outside the cafe. He asked Perry what he thought about the theory of evolution.
"It's a theory that's out there, and it's got some gaps in it," Perry said.
"Ask him why he doesn't believe in science," the mother prompted.
Rick Perry's Grade D in Principles of Economics, Grade F in Organic Chemistry II
HuffPo Publishes Perry's College Transcript The Texas Tribune
We are speechless that a person with this academic record is running to be president of the United States God give us strength to digest Rick Perry's college transcript! It is horrific.
Perry originally attended Texas A&M University to pursue a pre-veterinary major but switched to animal sciences, reportedly because of his low GPA. In his freshman and sophomore year, Perry struggled with core science classes, earning D's in several organic chemistry classes and C's in general chemistry and physics.
But after Perry switched his major at the beginning of his fall semester in 1970, his grades didn't improve. Perry got a C in Reproduction in Farm Animals, a C in genetics, a D in Feeds & Feeding, a C in Sheep & Angora Goat Production and two C's in animal breeding classes.
Many of Perry's other classes involved military education. Perry has previously credited his time in the A&M Corps of Cadets with giving him the necessary discipline to complete school.
Perry got two C's in Development of Air Power and took four levels of World Military Systems, earning two C's, a B and an A. The A was one of only two Perry earned at college — the other was for a class called Improv. of Learning.
The future governor only took one political science class while he was in school — American National Government, for which he earned a B. Other classes outside of Perry's major included Shakespeare and Writing for Professional Men, which earned him two D's.
Click to enlarge
CASH Introduces New Question into Rick Perry Debate
'Have you ever had sex with Rick Perry?' Salon
A Republican supporter of Ron Paul in Austin, Tex. has taken out a full-page ad in a local alt newspaper seeking any 'stripper … escort … or your hottie' who has slept with or fooled around sexually Rick Perry as part of his own campaign against the presidential candidate.
Robert Morrow, founder of CASH (Committee Against Sexual Hypocrisy), describes himself as a "self-employed investor and political activist" as well as a three-time delegate to the Texas state GOP convention.
We affirm, as did Salon, that there is absolutely no evidence that Perry has had extramarital affairs. Morrow says that strippers in Austin have stories about Perry, but none have been willing to come forward.
Poor, Poor Evangelicals
Michele Bachmann for President Backlash: Stop Attacking Evangelicals! The Daily Beast
Anne has entered the controversy around Michele Bachmann's comments about submitting to her husband, responding to a Daily Beast article written by FOX NEWS personality Kirsten Powers, who attempts to quote Biblical scriptures without knowing what she's talking about.
The real issue on this story is the fact that well over 1000 comments have appeared, which may not be a record for TDB, but it's a huge response. Perhaps for the first time online, moderates are pushing back vigorously against the radical evangelicals desire to turn America into a theocracy.

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By OSU Extension Services
Ongoing drought conditions in the southern Great Plains states make it increasingly likely the rebuilding of the United States' cow herd will take four years or more.
For the year to date, beef cow slaughter decreased 4.4 percent nationally while beef cow slaughter in Region 6, which closely corresponds to the drought area, increased 11.7 percent.
Derrell Peel, Oklahoma State University Cooperative Extension livestock marketing specialist, said the contrast between beef cow slaughter nationally and in the drought region clearly indicates that the effects are significant.
"At a minimum, Region 6 beef cow slaughter at the same rate relative to the cow herd as last year – which implies additional herd liquidation – would suggest about 49,000 fewer head than last year," he said. "Without the drought the national slaughter rate would be down 7.7 percent compared to the observed rate of 4.4 percent for the year to date."
Moreover, a Region 6 slaughter rate closer to the long-term average regional rate would suggest that an additional 100,000 head of cows have been added to total beef cow slaughter so far this year because of the drought.
For the entire year of 2011, it appears that beef cow slaughter could have decreased approximately 10 percent year over year in the absence of drought, a value that is consistent with herd expansion.
"The additional 100,000 head of culling already estimated implies that the annual beef cow slaughter rate would be limited to a decrease of 7 percent to 8 percent, and that assumes no additional drought-induced culling for the remainder of the year," Peel said.
However, the drought is still very much in place and more culling is likely.
"Projecting the current rate of slaughter for the southern Great Plains states for the rest of 2011 would result in a national beef cow slaughter rate that decreases only 3 percent," Peel said.
Peel's analysis indicates the resulting drought impacts are likely to have implications on the cow herd for several years.
"My early projections showed that it might have been possible to stabilize the beef herd this year but only under the most favorable circumstances," he said. "Even without a drought it was likely that the U.S. cow herd could easily decrease another 0.5 percent to 1 percent in 2011. Depending on how much additional drought liquidation occurs, beef herd liquidation upwards of 2 percent is increasingly likely."
Doing the math indicates that if the effects of the drought were to stop now, the additional cow slaughter that has already occurred would likely result in beef herd liquidation of close to 1.5 percent for the year.
"However, the additional herd liquidation will extend and exaggerate the current reduced animal inventories by at least another year," Peel said.
In short, herd growth rates will be limited when they finally do start. Peel said that makes it increasingly likely that any significant herd rebuilding will take at least four years to six years.


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Fruit & Fiber Cereal or favorite cereal with milk – use 1% fat milk – 220 calorie
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Coffee (1 cup) if desired
Mid Morning Snack
1 slice of wheat bread with low fat peanut butter – 100 calorie
sliced orange – 50 calorie
Lunch Diet Menu
Hamburger (lean beef) on toasted wheat bread with low fat cheese. Make at home and warm up at work – 320 calories
Healthy Choice Soup - turkey and rice (1 cup) – 90 calories
Water (2 cups)
Mid Morning Snack
Fuji apple - 80 calories
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Dinner Diet Menu
Tomato - Herb Chicken
cabbage or broccoli – 60 calories
Water (1 cup)
We specialize in designing personal diet plans to get the weight off. For your personal diet menus click Personal Diet Plan.
Calories & Weight Loss Issues
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© Copyright 1998 Diet Forum
Information contained in The Diet Forum is for increased awareness of diet and nutrition and in no way should be substituted for medical attention. Consult your physician for diagnosis or treatment and before beginning any diet program or exercise plan.


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A stolen vehicle was reported on Shealy Drive in Perry on Thursday.
A Windsor woman was detained for shoplifting on Wednesday after she tried to take a manicure set from Walmart.
A 27-year-old Graniteville man was detained for driving under the influence on Thursday after being pulled over on Whiskey Road for swerving in his lane.
Burglaries were reported to the Aiken County Sheriff's Office on Wednesday on Old 96 Indian Trail in Batesburg, Falcon Hill Drive in Aiken and Altees Corbett Road in Salley.
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Middlesbrough cup date set
28th Aug 2014 - Latest News
Liverpool have confirmed their Capital One Cup third-round tie with Middlesbrough will be played on Tuesday September 23.
The Anfield clash will kick-off at 7.45pm BST and has to be decided on the night.
Sky Sports will broadcast the game live.
Tagged: anfield , capital one cup , middlesbrough
Submit your views in the box below. Alternatively, you can debate these issues with fellow fans on our Message Boards or blog about them on The Kop
The views expressed here are not those of Liverpool Football Club (read more)


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Momentum seems to be building for granting asylum to the tens of thousands of unaccompanied minors who have illegally crossed into the United States from Central America. But lost amid the rush to brand opposition to asylum as uncaring, if not racist, is a serious discussion about whether the U.S. is really obligated to take in every illegal immigrant child who fled violence at home.
With the mainstream media seeking to stoke sympathy for these kids, it is hardly surprising that a new poll shows that 69 percent of Americans believe the children should be allowed to stay if it wasn't safe for them to be sent home. Figures as diverse as Hillary Clinton and conservative icon George Will have also endorsed treating the kids as refugees.
While it is no surprise that Clinton would seek to play the sympathy card for the illegals, Will's statement dismissing concerns about the children is a significant victory for immigration advocates:
My view is that we ought to say to these children, welcome to America. You're going to go to school and get a job and become Americans. We have 3,141 counties in this country. That would be 20 per county. The idea that we can't assimilate these 8-year-old criminals with their teddy bears is preposterous.
Will is right that these children are not in and of themselves a threat to the country. Immigration strengthens the country. These children may well make impressive contributions to the country if allowed to study and grow up here. Moreover, so long as the discussion about this topic centers on the plight of these kids and the awful conditions in places like Honduras, Guatemala, or El Salvador, it is hard to argue that children who have already suffered terribly during their dangerous treks to the U.S. should be sent back to a situation where their lives could be in danger.
But there is more at stake in this debate about their future than a test of the country's ability to empathize with the downtrodden. A decision to allow these children to stay will end the issue but will not end this crisis. Instead, as we should have already learned, anything other than a strong signal that the illegals won't be allowed to stay will ensure that the border will continue to be a magnet for an unending stream of illegals including children for the foreseeable future.
I sympathize with these children and their families who look to the United States as a haven from the awful conditions in much of Central America. Nor do I share the fear of immigrants or the belief that their presence damages the nation. Our broken immigration system should be fixed and, in the long run, some solution must be found for the 12 million illegals already here since talk of their deportation is merely empty rhetoric.
But any country, even the United States, is entitled to control its borders and to see its laws enforced. A failure to send the kids home will send a loud message to the region that will encourage more to try to cross the border, a dangerous process that hurts the children and winds up saddling the U.S. with more illegal aliens.
Moreover, the proposition that America has no choice but to allow the kids to stay as refugees is unsupported by law or common sense. The traditional definition of a refugee is a person who has been forced to flee their homes by war, persecution, or a natural disaster. As bad as conditions are in Central America where drug gangs have made the life of many hell, the idea that crime or poverty in the absence of those other factors can make someone a refugee with a legal right to stay here is virtually unprecedented.
Even more to the point, the notion that it is the job of the United States to not only aid neighbors in distress but to take as many of them into our borders without them obtaining permission is to create an open-ended definition of America's obligations that has no end in sight. After all, those three nations are not the only ones where kids are in danger.
You don't have to be an opponent of immigration or oppose reform to understand that the loose talk from the White House about allowing young illegals to stay helped set off the current crisis. To compound this mistake by failing to send these children home will be to send a message that America's immigration laws are meaningless and that the border is no barrier to those who wish to take advantage of the country's bounty regardless of legal rights.
The question here isn't whether we can, as Will stated, assimilate these children. Of course we can. It's whether an overly broad definition of refugee status will be manipulated by the administration in order to begin the process by which all illegals will be granted permission to stay, perhaps by executive orders in order to boycott Congress.
What is happening at the border is a humanitarian crisis, albeit a man-made one. But it cannot be used as an excuse to justify a lawless approach to governance that will make it impossible for genuine reforms to ever gain majority support. If the president wishes to help aid the people of Central America, he will, no doubt, have the majority of Americans behind him. But America cannot solve the problems of Central America by importing its children. Rolling out the welcome mat for these illegals is a humanitarian snare that will merely ensure that they will be just the first wave of an endless tide of undocumented migrants.