• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.10
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• pp.2171-2179
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• 2009

In this paper, we propose a novel Image Encryption using MLCA (Maximum Length Cellular Automata) and CAT (Cellular Automata Transform). Firstly, we use the Wolfram rule matrix to generate MLCA state transition matrix T. Then the state transition matrix T changes pixel value of original image according to pixel position. Next, we obtain Gateway Values to generate 2D CAT basis function. Lastly, the basis function encrypts the MLCA encrypted image into cellular automata space. The experimental results and security analysis show that the proposed method guarantees better security and non-lossy encryption.

• Korean Journal of Microbiology
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• v.27 no.2
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• pp.85-91
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• 1989

The effect of SV40 and murine cytomegalovirus (MCMV) enhancers on the general and tissue-specific gene expression was investigated. Recombinant plasmids containing these transcriptional engancers downstream of a structural gene for chloramphenicol acetyl transferase (CAT) were constructed. The transient expression of CAT gene from these plasmids was measured in monkey (CV1PD) and HeLa cells. Both SV40 and MCMV engancers activated the expression of CAT gene by more than 20 and 150 folds, respectively, compared with engancerless plasmids. When the SV40 promoter, upstream of CAT gene, was replaced with 2.2 kbp of promoter regulatory region of bovine growth hormone (bGH) gene, there was no expression of CAT even in the presence of enhancers, reflecting the tissue-specific expression of bGH genes. However, when the bGH regulatory region was shortened to 230 bp, the expression level increased dramatically in the presence of SV40 enhancers. In contrast, the expression from the shortened promoter was only marginally activated by the stronger MCMV enhancer.

• Korean Journal of Adult Nursing
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• v.15 no.3
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• pp.402-410
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• 2003

Purpose: The purpose of this study was to develop a fundamental reference for the clinical implementation of Complementary and Alternative Therapy(CAT) by surveying and analyzing different perception and attitude between nurses and physicians. Method: A total of 167 nurses and 103 physicians from two C university health science centers participated in this survey, and SPSS program with version 10.0 was used to analyze the result of survey. Result: As results, 72.7% nurses and 57.1% physicians showed positive attitude for the concept of CAT, 60.6% nurses and 36.7% physicians responded positively while 2.6% nurses and 25.9% physicians responded negatively for the application of CAT to the clinical practice. There was a meaningful difference between two groups in the belief of therapeutic effectiveness of CAT. 67.7% nurses believed the therapeutic effectiveness of CAT while 38.8% physicians did. For attitudes of nurses and physicians toward CAT showed meaningful difference according to general characteristics: age, gender, marital status, a level of education, position in the organization, religion, and duration of health care service other than inpatient units. Conclusion: In this study, the attitudes of nurses and physicians about CAT showed meaningful difference that nurses were more positive than physicians in application.

• Journal of Microbiology
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• v.41 no.2
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• pp.102-108
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• 2003

A 6.1 kb Sph I fragment from the genomic DNA of Pseudomonas putida SM 25 was cloned into the veetor pUC19. The open reading frame of catB was found to consist of 1,122 nucleotides. The sequence alignment of the catB gene products from different kinds of bacteria revealed an overall identity ranging from 40 to 98%. The catC gene contained an open reading frame of 96 codons, from which a protein with a molecular mass of about 10.6 kDa was predicted. The amino acids in the proposed activesite region of CatC were found to be almost conserved, including the charged residues. Since the catBC genes in P. putida SM25 were tightly linked, the could be regulated under coordinate transcription, and transcribed from a single promoter located upstream of the catB gene, as in P. putida RBI.

• Cross-Cultural Studies
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• v.33
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• pp.287-307
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• 2013

One cat caused a big wave in Russian literature. This cat revived the heroine of Russian classics. Her light breath was scattered in the world, in the cloudy sky and in the cold spring wind about one hundred years ago. And the cat gave an opportunity of turning to Russian classics to Russian readers. Thanks to this cat, a Russian dreamer changed his typical thinking, as well as many ordinary readers start to read works of creator of this wonderful cat. Pelevin accomplished these works with one cat, which he has made. Of course "Nika" is not only caused to make readers to return to Russian classics. I think, the cat and "Nika" are the symbols of writer's purpose in Russian literature. In this study the understanding of "Nika" is following the steps of realization of writer's purpose. In the second chapter it is analyzed to the textual relationship between "Nika" and "Light breath". Apart from existing analyses to be emphasized the succession of thematic aspect of two works as well. Existence of observers to each heroine stress this succession of thematic aspect of two works. In the third chapter it is analyzed the use of technique of mystification in "Nika". This intentional use of mystification has been demanded to read a "Nika" from another point of view(internal speculation of hero-narrator). The purpose of writer was to expose the cognitive error of a human being. I think this purpose was effectively explained by Pelevin's Buddhist world view which was introduced in his several works.

• Proceedings of the Korean Society of Applied Pharmacology
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• 1995.10a
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• pp.153-155
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• 1995

To investigate the mechanism of the regulation of cytochrome P450IAl, the 5'-flanking region of a trout cytochrome P4501Al was cloned into the CAT basic expression vector at HindⅢ site. This trout Cytochrome P450IAl upstream DNA containing CAT construct was transfected into Hepa-1 cells .3MC treatment to hepa I cells transfected with trout P450IAl-CAT construct increased CAT protein and mRNA by 2.81 fold when it was compared with that of control. This increase CAT protein and mRNA was decreased by concomitantly treated flavonoids and aminopyrine. The level of CAT protein was 29.2-58.0% of 3MC stimulated CAT protein.

• Journal of Animal Science and Technology
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• v.66 no.3
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• pp.443-456
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• 2024

In female tract, mammalian sperm develop hyperactivated motility which is a key physiological event for sperm to fertilize eggs. This motility change is triggered by Ca²⁺ influx via the sperm-specific Ca²⁺ channel, CatSper. Although previous studies in human and mice largely contributed to understanding CatSper and Ca²⁺ signaling for sperm hyperactivation, the differences on their activation mechanisms are not well understood yet. There are several studies to examine expression and significance of the CatSper channel in non-human and non-mouse models, such as domestic animals. In this review, I summarize key knowledge for the CatSper channel from previous studies and propose future aspects for CatSper study using sperm from domestic animals.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.6C
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• pp.361-367
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• 2011

In this paper, we propose encryption method to using complemented MLCA(Maximum Length Cellular Automata) based on NBCA(Null Boundary CA) and 2D CAT (Two-Dimensional Cellular Automata Transform) for efficient image encryption. The encryption method is processed in the following order. First, a transition matrix T is created using the Wolfram Rule matrix. Then, the transition matrix T is multiplied to the original image that is intended to be encrypted, which transfers the pixel values of the original image. Furthermore, the converted original image goes through a XOR operation with complemented vector F to convert into a complemented MLCA applied image. Then, the gateway value is set and 2D CAT basis function is created. Also, the 2D CAT is encrypted by multiplying the created basis function to the complemented MLCA applied image. Lastly, the stability analysis verifies that proposed method holds a high encryption quality status.

• Journal of Navigation and Port Research
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• v.46 no.6
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• pp.509-516
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• 2022

Recently, ships have begun using the Asterix CAT 240 format as a method for transmitting radar image data to other devices. However, the Asterix format has a flexible structure that can be defined by the user, and a format structure defined as unsuitable for ship radar operation may undesirably increase navigational equipment network traffic or reduce stability. Therefore, to reduce the traffic of the navigation network and enhance the stability, a method of defining the optimized Asterix CAT 240 format with an appropriate setting value according to the performance of the radar scanner and display device was studied.

• Current Research on Agriculture and Life Sciences
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• v.11
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• pp.81-89
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• 1993

In order to isolate a mutant which was constitutively expressed in xylA gene, Pxyl-cat-xylA fusion gene was constructed by the insertion of cat gene between xylA promoter and xylA structural gene in pEX13 contained xylA gene. The expression of cat and xylA gene from transformants of xylA mutant DH77 with plasmid pEXC131 containing Pxyl-cat-xylA fusion gene was induced by the addition of 0.4% xylose to media. This results indicated that cat and xylA gene were expressed under control of xylA promoter the presence of xylR gene. We have also isolated constitutive mutant plasmid pEXC131-39 from pEXC131 by trementment with N-methyl-N'-nitro-N-nitrosoguanidine(NTG). cat and xylA gene from pEXC131-39 were constitutively expressed without induction of xylose regardless of xylR gene. Transformants of xylR mutant DH60 with pEXC131-39 also expressed chloramphenicol resistances and xylose isomerase without induction of xylose. This result shows that mutation in region of xylA promoter might make it possible to be constitutively expressed.