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CHARACTERIZATION OF STANDARD EXTREME VALUE DISTRIBUTIONS USING RECORDS
Valeria Skrivankova,Matej Juhas 충청수학회 2011 충청수학회지 Vol.24 No.3
The paper deals with characterization of standard Gum- bel distribution and standard Frechet distribution and was moti-vated by [4], where the Weibull distribution is characterized. We present criterions using the independence of some suitable functions of lower records in a sequence of independent identically distributed random variables fXn; n ¸ 1g.
A new magnetorheological brake`s combined materials design approach
Aleksandar Poznic,Danijela Miloradovic,Anamarija Juhas 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.3
Increase of magnetic flux density intensity, in certain parts of a Magnetorheological (MR) brake, was researched in order to improve MR brake`s overall braking properties. This paper proposes a new combined materials approach. New approach achieved magnetic flux density path routing. To verify the effect, two MR brake prototypes: The conventional one and the combined materials one, have been designed, manufactured and tested. Both prototypes had the same geometry. The construction material’s magnetic properties had to be determined by measurements. To increase the overall braking torque, the combined materials MR brake prototype featured non-magnetic housing materials and has successfully yielded significantly larger overall braking torque compared to the conventional MR brake.
Khitan: Understanding the Language Behind the Scripts
Juha A. Janhunen 훈민정음학회 2012 Scripta Vol.0 No.4
Khitan was the dynastic language of the Liao empire in Manchuria and Northern China (907-1115). Although today extinct, samples of Khitan are preserved in two native scripts, known as the Khitan Large Script and the Khitan Small Script. Both scripts may be classified as “Sinitic” or “Sinoform” in the typological sense, though only the Large Script has a direct connection with the Chinese script. Recent progress in the decipherment of, in particular, the Khitan Small Script allows the lexicon and grammar of the Khitan language to be assessed in much more detail than before. Khitan may be defined as a Para-Mongolic language, meaning that it represents a branch related to, but collateral with, the extant and historically known Mongolic languages. The present paper examines the genetic position of the Khitan language with regard to Mongolic with the help of the methods of comparative linguistics, as applied to the deciphered Khitan language material.
Pregnancy, childbirth, and puerperium outcomes in female firefighters in Korea
Juha Park,Yeon-Soon Ahn,Min-Gi Kim 대한직업환경의학회 2020 대한직업환경의학회지 Vol.32 No.-
Background: Female firefighters are exposed to hazardous environmental (chemical and physical) and working (shift work, psychological, and ergonomic factors) conditions that have reported or are suspected of adverse effects on reproductive health. However, no previous studies have reported on pregnancy, childbirth, and puerperium outcomes (PCPOs) in female firefighters. Methods: The present study compared hospital admissions for PCPOs, based on 10th revision of the International Statistical Classification of Diseases and Related Health Problems (ICD-10) codes, among Korean female firefighters with those of the general Korean population. Standardized admission ratios (SARs) and their 95% confidence intervals (CIs) were calculated. Results: The study population included 1,766 female firefighters. Total follow-up duration was 9,659 person-years. Compared to the general female population, the female firefighters" SARs were higher in all admissions for PCPOs (SAR, 1.92; 95% CI: 1.79–2.05); pregnancy and abortive outcomes (SAR, 1.56; 95% CI: 1.12–2.12); other maternal disorders predominantly related to pregnancy (SAR, 2.65; 95% CI: 1.99–3.46); maternal care related to the fetus, amniotic cavity, and possible delivery problems (SAR, 2.13; 95% CI: 1.74–2.57); labor and delivery complications (SAR, 1.55; 95% CI: 1.15–2.06); delivery (SAR, 1.94; 95% CI: 1.80–2.08); and complications predominantly related to puerperium (SAR, 4.68; 95% CI: 2.02–9.23). Conclusion: The results of this study showed high SARs in all and specific subcategories of PCPOs in female firefighters.
Money Supply Rules and Exchange Rate Dynamics
Juha Tervala 한국국제경제학회 2012 International Economic Journal Vol.26 No.4
This paper examines the implications of monetary policy rules for exchange rate dynamics. I extend a standard New Open Economy Macroeconomics model with the introduction of a simple money supply rule, whereby central banks change their monetary policy if output diverges from potential output or if inflation diverges from the target inflation. A key result is that, in the case of permanent technology and monetary shocks, the nominal exchange rate does not follow a random walk; instead, the exchange rate undershoots its long-run value. An undershooting of the exchange rate derives from the active monetary policy that both countries conduct.
( Juha Park ),( Hee-jin Yoo ),( Ah-ran Yu ),( Hye Ok Kim ),( Sang Cheol Park ),( Young Pyo Jang ),( Chayul Lee ),( Wonchae Choe ),( Sung Soo Kim ),( Insug Kang ),( Kyung-sik Yoon ) 한국미생물생명공학회(구 한국산업미생물학회) 2021 Journal of microbiology and biotechnology Vol.31 No.4
The Wnt/β-catenin signaling pathway is involved in breast cancer and Myxococcus fulvus KYC4048 is a myxobacterial strain that can produce a variety of bioactive secondary metabolites. Although a previous study revealed that KYC4048 metabolites exhibit anti-proliferative effects on breast cancer, the biochemical mechanism involved in their effects remains unclear. In the present study, KYC4048 metabolites were separated into polar and non-polar (ethyl acetate and n-hexane) fractions via liquid-liquid extraction. The effects of these polar and non-polar KYC4048 metabolites on the viability of breast cancer cells were then determined by MTT assay. Expression levels of Wnt/ β-catenin pathway proteins were determined by Western blot analysis. Cell cycle and apoptosis were measured via fluorescence-activated cell sorting (FACS). The results revealed that non-polar KYC4048 metabolites induced cell death of breast cancer cells and decreased expression levels of WNT2B, β-catenin, and Wnt target genes (c-Myc and cyclin D1). Moreover, the n-hexane fraction of non-polar KYC4048 metabolites was found most effective in inducing apoptosis, necrosis, and cell cycle arrest, leading us to conclude that it can induce apoptosis of breast cancer cells through the Wnt/β-catenin pathway. These findings provide evidence that the n-hexane fraction of non-polar KYC4048 metabolites can be developed as a potential therapeutic agent for breast cancer via inhibition of the Wnt/β-catenin pathway.