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김화영(Hwayoung Kim),김형민(Hyungmin Kim),송민수(Minsu Song),안지훈(Jihun An),김강현(Ganghyun Kim),김선민(Sunmin Kim),김찬현(Chanhyun Kim),박성우(Seoungwoo Park),이준우(Junu Lee),이준기(Joonki Rhee),임재혁(Jaehyuk Im),정승수(Seungsu Jeo 한국추진공학회 2022 한국추진공학회 학술대회논문집 Vol.2022 No.5
본 논문은 경기대학교 KURBC 팀이 설계한 모듈형 신기전K22에 대한 설계과정과 그 근거를 서술하였다. 로켓의 임무는 ‘로켓 발사 후 낙하 시 낙하산 사출 및 안전한 회수’이다. 목표 고도는 400m, 연료는 질산칼륨-소르비톨(KNSB)이다. 낙하산 사출 방법은 동체와 낙하산이 안전하게 보호되는 용수철 사출을 선택했다. 본 팀은 이번 대회에서 CFRP 카본으로 로켓의 동체를 만들고, 내부를 모듈로 구성함으로써 차별점을 두었다. 또한 RF 장거리 통신 기술을 이용하여 발사 전후의 데이터를 체계적으로 기록하여 후속 연구에 참고할 예정이다. This paper describes the design process and basis for the modular Shinkijeon-K22 designed by the KURBC team of Kyonggi University. The rockets mission is devising a method for parachute injection and safe recovery when falling after launching the rocket. The target altitude is 400 m and the fuel is potassium nitrate-solvitol (KNSB). The spring injection method was used for the parachute injection, in which the fuselage and parachute are safely protected. We made a difference by making the rockets fuselage with CFRP carbon and configuring the interior as a module. In addition, RF long-distance communication technology will be used to systematically record data before and after launch and refer it to subsequent studies.
Kim, Injung,Park, Jongkeun,Kim, Jeong-Ki,Kim, Bong-Kyu,Lee, Hwayoung,Choi, Keonwoo,Yoon, Jong-Bok,Yoon, Sungjoo Kim Springer-Verlag 2014 Genes & Genomics Vol.36 No.3
T-cadherin is frequently down regulated in various cancers, however, the underlying mechanisms responsible have yet to be elucidated. A genome wide association study of a cohort of Korean adults revealed that the T-cadherin rs3865188 single nucleotide polymorphism (SNP) was associated with serum Adiponectin levels and that its genotypic variants were correlated with risk for colorectal cancer (CRC). To test the function of rs12444338, a SNP tightly linked to the rs3865188 SNP, in T-cadherin transcriptional regulation in colorectal cancer, its effect on transcriptional activity and the capacity of binding activity attributable to allelic variation of the rs12444338 SNP was investigated. An electrophoretic-mobility-shift assay (EMSA) revealed a specific nucleoprotein complex unique to the T allele probe, which displayed lower promoter activity when compared to the G allele. Based on the results of the EMSA using mutant probes, the consensus sequence of the putative transcription factor binding site was determined. Additionally, candidates for putative binding factors to the T allele were also identified. Collectively, the study data suggested that the rs12444338 SNP was involved in transcriptional regulation of T-cadherin gene (CDH13) and that the differential binding of transcription factors at the rs12444338 SNP resulted in altered gene expression. These results elucidate, at least in part, the regulation of T-cadherin expression in CRC and provide further information regarding the effect of nucleotide variation in its promoter region.
Lee, Hwayoung,Kim, Hyung-Ki,Kwon, Jun-Tack,Park, Shohyun,Park, Hae Jeong,Kim, Su Kang,Park, Jin Kyung,Kang, Won Sub,Kim, Young Jong,Chung, Joo-Ho,Kim, Jong Woo,Kim, Hak-Jae Elsevier 2018 Psychiatry Research Vol.259 No.-
<P><B>Abstract</B></P> <P>Prenatal exposure to infectious or inflammatory insults can increase the risk of developing neuropsychiatric disorders such as bipolar disorder, autism, and schizophrenia in later life. Gamma-butyrobetaine hydroxylase (BBOX 1) is an enzyme responsible for the biosynthesis of l-carnitine, a key molecule in fatty acid metabolism. This cytosolic dimeric protein belongs to the dioxygenase family. In this study, we investigated whether BBOX 1 expression was related to psychiatric disorder in an animal model. We also conducted a case–control study using 284 schizophrenia patients and 409 controls with single-nucleotide polymorphisms (SNPs) in the 5′-near region of BBOX 1. BBOX 1 expression was increased in the medial frontal cortex of a mouse model of schizophrenia induced by maternal immune activation. Furthermore, the genotype and allele frequencies of two SNPs (rs7939644 and rs10767592) were significantly associated with schizophrenia susceptibility. Our results suggest that BBOX 1 might be associated with maternal immune activation and schizophrenia susceptibility. Therefore, it might be involved in the pathophysiology of schizophrenia.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Bbox 1 protein was downregulated in the medial prefrontal cortex in a poly I:C-induced model of schizophrenia. </LI> <LI> Two SNPs of BBOX 1 were associated with human schizophrenia susceptibility. </LI> <LI> Significant pre-pulse facilitation was detected in the poly I:C-induced model. </LI> </UL> </P>
In-Memory 데이터베이스를 활용한 커뮤니티 서비스 성능 향상: 카페 추천 서비스
김준우(Junwoo Kim),김형우(Hyungwoo Kim),김승률(Seungryul Kim),박주형(Juhyeong Park),최화영(Hwayoung Choi),최재영(Jaeyeong Choi),김상진(Sangjin Kim) 한국정보기술학회 2024 Proceedings of KIIT Conference Vol.2024 No.5
본 논문에서는 커뮤니티 서비스의 성능을 향상시키기 위해 In-memory 데이터베이스의 도입을 제안한다. 이를 위해 특정 테마의 카페를 추천하는 커뮤니티 서비스를 기획하고 구현하는 방법을 논의한다. In-memory 데이터베이스를 도입함으로써 데이터베이스 접근 속도를 향상시켜 서비스 응답 시간을 최적화할 수 있다. This paper proposes the adoption of an In-memory database to enhance the performance of community services. To achieve this, the paper discusses the planning and implementation of a community service that recommends cafes based on specific themes. By introducing an In-memory database, the access speed to the database can be improved, thereby optimizing the service response time.
Effects of tianeptine on symptoms of fibromyalgia via BDNF signaling in a fibromyalgia animal model
Hwayoung Lee,Jiyun Im,Hansol Won,Wooyoung Nam,Young Ock Kim,Sang Won Lee,Sanghyun Lee,Ik-Hyun Cho,Hyung-Ki Kim,Jun-Tack Kwon,Hak-Jae Kim 대한생리학회-대한약리학회 2017 The Korean Journal of Physiology & Pharmacology Vol.13 No.1
Previous reports have suggested that physical and psychological stresses may trigger fibromyalgia (FM). Stress is an important risk factor in the development of depression and memory impairments. Antidepressants have been used to prevent stress-induced abnormal pain sensation. Among various antidepressants, tianeptine has been reported to be able to prevent neurodegeneration due to chronic stress and reverse decreases in hippocampal volume. To assess the possible effect of tianeptine on FM symptoms, we constructed a FM animal model induced by restraint stress with intermittent cold stress. All mice underwent nociceptive assays using electronic von Frey anesthesiometer and Hargreaves equipment. To assess the relationship between tianeptine and expression levels of brain-derived neurotrophic factor (BDNF), cAMP response element-binding protein (CREB), and phosphorylated cAMP response element-binding protein (p-CREB), western blotting and immunohistochemistry analyses were performed. In behavioral analysis, nociception tests showed that pain threshold was significantly decreased in the FM group compared to that in the control group. Western blot and immunohistochemical analyses of medial prefrontal cortex (mPFC) and hippocampus showed downregulation of BDNF and p-CREB proteins in the FM group compared to the control group. However, tianeptine recovered these changes in behavioral tests and protein level. Therefore, this FM animal model might be useful for investigating mechanisms linking BDNF-CREB pathway and pain. Our results suggest that tianeptine might potentially have therapeutic efficacy for FM.