Recovery of Decane using Three Desorption Method

( Jeongmin Park ),( Sang-sup Lee ) 한국폐기물자원순환학회(구 한국폐기물학회) 2019 ISSE 초록집 Vol.2019 No.-

Volatile organic compounds (VOCs) are generated at high concentrations in close proximity to daily life such as dry cleaning process. VOCs have an adverse effect on human health. Various methods are applied to remove these VOCs. Among them, the adsorption method is suitable for controlling high concentration VOCs. Recovery of VOCs is very important as well as adsorption. Depending on desorption method, the recovery efficiency of VOCs may vary. Therefore, in this study, desorption experiments were carried out using three different methods: (1)Air, (2)Vacuum, (3)Vacuum + air. The adsorption and desorption were conducted at room temperature, and the concentration of decane released during adsorption/desorption was measured by GC.

Morphology and distribution of antennal sensilla of the bean bug Riptortus pedestris (Hemiptera: Alydidae)

Jeongmin Kim,Kye Chung Park,Hyun Sik Roh,HyunWooOh,Ji-AeKim,Chung-gyoo Park 한국응용곤충학회 2015 한국응용곤충학회 학술대회논문집 Vol.2015 No.10

Sensory system of insect is important for their fitness in the environment. Riptortus pedestris (Hemiptera: Alydidae) is a major pest of bean plants and some fruit trees in Korea, Japan, China, and South Asian countries. This study was conducted to investigate morphology and distribution of antennal sensilla of R. pedestris, using scanning electron microscopy. Antennae of R. pedestris was 11 and 9.84 mm in length in male and female, respectively, and consists of four segments; scape, pedicel, flagellum 1 and 2 (F1 and F2). Five types of sensilla (s.) trichodea, four types of s. basiconica, two types of s. chaetica, and one type of s. coeloconica were preliminary identified in both sexes of adult R. pedestris, based on their size, shape, presence of socket and surface structure. Three types of trichoid sensilla, four types of basiconic sensilla, one type of chaetic sensilla and coeloconic sensilla had numerous pores along the surface of the sensilla, suggesting their olfactory function. Eight types of sensilla (3 trichoid, 2 basiconic, a chaetic and a coeloconic) showed a distinct socket structure at the base of each sensillum. Different types of sensilla showed different distribution along the antennal segments. Two types of trichoid sensilla and two types of basiconic sensilla were distributed on scape, pedicel and F1 flagella subsegment. However, the distribution of eight other types of sensilla was limited to one of two flagella subsegments.

EPR Study of${\gamma}(1,2)-[H{_n}SiV^{IV}VW_{10}O_{40}]^{(7-n)-}$ (n = 0, 1 or 2). Identification of Four One-Electron Reduction Products and Evidence for Proton Transfer in the Solid State

Jeongmin Park,Hyunsoo So Korean Chemical Society 1994 Bulletin of the Korean Chemical Society Vol.15 No.9

Several one-electron reduction products of ${\gamma}$(1,2)-[$H_nSiV_2W_{10}O_{40}]^{(6-n)-}$ were separated by precipitating or coprecipitating with diamagnetic host compounds at different pH. Mono-and diprotonated species, 1 and 2, in powder samples exhibit aPR spectra characteristic of a mononuclear oxovanadium species, indicating that the unpaired electron is trapped at one vanadium atom. The EPR spectrum of the unprotonated species 0 shows 15 parallel lines, indicating that the unpaired electron interacts equally with two vanadium atoms. While different species were precipitated depending upon the pH of the solution and the charge of the host anion, only one species 1' was formed in the frozen solutions at pH 3.2-4.7. The EPR spectrum of 1' indicates that the unpaired electron is trapped at one vanadium atom and 1/16 of the spin density is delocalized onto the second vanadium atom. The species 1' is probably another form of the monoprotonated species. The EPR spectra show that some of 2 transform into 1 and some of 0 transform into 1' in the solid state at low temperatures. It is suggested that proton transfer between the heteropolyanion and water molecues in the solid state is involved in these transformations.

Effects of Kind and Concentration of Plant Growth Retardants on Growth of Potted Geranium

Jeongmin Park,Yongheon Han,Jaeyo Sin,Jeong hyun Ahn,Wook Oh 한국화훼학회 2023 한국화훼학회 정기총회 및 학술발표회 자료집 Vol.31 No.1

Influence of winter precipitation on spring phenology in boreal forests

Jeongmin Yun,Su-Jong Jeong,Chang-Hoi Ho,Chang-Eui Park,Hoonyoung Park,Jinwon Kim 한국기상학회 2018 한국기상학회 학술대회 논문집 Vol.2018 No.4

Similarities and Distinctions in the Effects of Metformin and Carbon Monoxide in Immunometabolism

Park, Jeongmin,Joe, Yeonsoo,Ryter, Stefan W.,Surh, Young-Joon,Chung, Hun Taeg Korean Society for Molecular and Cellular Biology 2019 Molecules and cells Vol.42 No.4

Immunometabolism, defined as the interaction of metabolic pathways with the immune system, influences the pathogenesis of metabolic diseases. Metformin and carbon monoxide (CO) are two pharmacological agents known to ameliorate metabolic disorders. There are notable similarities and differences in the reported effects of metformin and CO on immunometabolism. Metformin, an anti-diabetes drug, has positive effects on metabolism and can exert anti-inflammatory and anti-cancer effects via adenosine monophosphate-activated protein kinase (AMPK)-dependent and AMPK-independent mechanisms. CO, an endogenous product of heme oxygenase-1 (HO-1), can exert anti-inflammatory and antioxidant effects at low concentration. CO can confer cytoprotection in metabolic disorders and cancer via selective activation of the protein kinase R-like endoplasmic reticulum (ER) kinase (PERK) pathway. Both metformin and CO can induce mitochondrial stress to produce a mild elevation of mitochondrial ROS (mtROS) by distinct mechanisms. Metformin inhibits complex I of the mitochondrial electron transport chain (ETC), while CO inhibits ETC complex IV. Both metformin and CO can differentially induce several protein factors, including fibroblast growth factor 21 (FGF21) and sestrin2 (SESN2), which maintain metabolic homeostasis; nuclear factor erythroid 2-related factor 2 (Nrf2), a master regulator of the antioxidant response; and REDD1, which exhibits an anticancer effect. However, metformin and CO regulate these effects via different pathways. Metformin stimulates p53- and AMPK-dependent pathways whereas CO can selectively trigger the PERK-dependent signaling pathway. Although further studies are needed to identify the mechanistic differences between metformin and CO, pharmacological application of these agents may represent useful strategies to ameliorate metabolic diseases associated with altered immunometabolism.

Self-healing Mechanism for Reliable Computing

Jeongmin Park,Jinsoo Jung,Shunshan Piao,Eunseok Le 보안공학연구지원센터 2008 International Journal of Multimedia and Ubiquitous Vol.3 No.1

One of the four major processes of an autonomic computing system is to free people from discovering, recovering, and failures, this process is called self-healing. Systems designed to be self-healing are able to heal themselves at runtime in response to changing environmental or operational circumstances. Thus, the goal is to avoid catastrophic failure through prompt execution of remedial actions. This paper proposes a self-healing mechanism that monitors, diagnoses and heals its own internal problems using self-awareness as contextual information. The self-management system that encapsulates the self-healing mechanism related to reliability improvement addresses: (1) Monitoring layer, (2) Diagnosis & Decision Layer, and (3) Adaptation Layer, in order to perform self-diagnosis and self-healing. To confirm the effectiveness of self-healing mechanism, practical experiments are conducted with a prototype system.

Self-healing Mechanism for Reliable Computing

Jeongmin Park,Jinsoo Jung,Shunshan Piao,Eunseok Lee 보안공학연구지원센터 2008 International Journal of Multimedia and Ubiquitous Vol.3 No.2

One of the four major processes of an autonomic computing system is to free people from discovering, recovering, and failures, this process is called self-healing. Systems designed to be self-healing are able to heal themselves at runtime in response to changing environmental or operational circumstances. Thus, the goal is to avoid catastrophic failure through prompt execution of remedial actions. This paper proposes a self-healing mechanism that monitors, diagnoses and heals its own internal problems using self-awareness as contextual information. The self-management system that encapsulates the self-healing mechanism related to reliability improvement addresses: (1) Monitoring layer, (2) Diagnosis & Decision Layer, and (3) Adaptation Layer, in order to perform self-diagnosis and self-healing. To confirm the effectiveness of self-healing mechanism, practical experiments are conducted with a prototype system.

How Autocrats Fall

Jeongmin Park(박정민),Taehee Whang(황태희) 한국정치학회 2018 한국정치학회보 Vol.52 No.6

전쟁이 국가 정치지도자의 정치생명에 어떤 영향을 주는가는 민주평화론을 비롯하여 국내정치와 국제정치를 연결짓는 연구에 핵심적인 고리라고 할 수 있다. 현재까지 정치지도자의 정치생명에 관한 연구는 정치지도자의 임기가 전쟁의 결과에 따라 어떻게 달라지는지에 주목해 왔다. 그러나 임기변동을 일으키는 주요 국내 행위자를 비롯하여 다른 국내적 요인들과 함께 고려하지 않았다. 본 연구는 전쟁의 결과와 전쟁의 비용 모두를 고려해 전후 경제수준 변화, 전쟁발발 위치, 그리고 사망자 수를 독립변수인 전쟁의 비용으로 개념화하여 전쟁 비용이 종속변수인 지도자 임기에 미치는 영향을 밝힌다. 연구의 두 번째 부분에서는 지도자 임기에 영향을 끼칠 수 있는 국내적 행위자 중 하나인 군대의 이해관계를 고려해 쿠데타 발생을 두 번째 종속변수로 설정한다. 다중회귀분석 결과, 민주주의 국가에서 전쟁비용이 지도자 임기에 미치는 영향은 적지만 비민주국가에서 전쟁 비용의 영향이 크다는 것을 알 수 있었고, 설령 전쟁에서 패배했더라도 해당 국가의 군비지출이 차지하는 비중이 늘었을 때 군사 쿠데타 발생 확률이 현저하게 낮아진다는 것을 알 수 있었다. Are autocrats invulnerable to external factors? Various studies examining the link between war and leader tenure argue that, while military defeat increases democratic leaders’ risk of removal, autocratic leaders are usually exempt from such threats. However, war outcome is a narrow predictor of costs and wins of war. Such arguments also obscure dissimilar domestic actors and interests behind leader removal. Building on these two criticisms, we measure the impact of war costs on leader removal by setting post-war economy, casualty, and war location as war costs variables. We argue that open, regular elections ensure democratic leaders’ tenure is not shortened by external factors unlike in non-democracies. We show that all war costs variables wield significant impact on leader removal in non-democracies while democratic leaders are shielded from such impact even after controlling for military defeat. We then narrow the focus down to one subcategory of leader removal, coup d’etat, and demonstrate that an increased military expenditure share of GDP decreases the likelihood of coup onset even under military defeat, a condition typically associated with higher likelihood of coup onset. The findings raise the necessity of further studying the relation between war and domestic interests, and how this relation in turn impacts a state’s foreign policy decisions.

Effect of thin Ti adhesion layers with Te-based chalcogenide film on device performance

Jeongmin Park,Sang-Heon Park,Jong-Souk Yeo 한국진공학회 2020 한국진공학회 학술발표회초록집 Vol.2020 No.8