마이크로 셀룰라 네트워크에서 다단계 워킹셋 개념을 이용한 효율적인 위치등록

안요찬 大田大學校 産業技術硏究所 1997 산업기술연구소 論文集 Vol.8 No.2

본 논문에서는 다단계 워킹셋 개념을 이용하여 효율적인 위치등록 방법을 제안한다. 위치영역은 이동국이 최근에 방문한 인접한 셀들의 모임이다. 이러한 관점에서 셀들의 모임을 이동국의 워킹셋이라고 규정하였다. 각 이동국은 자신의 위치영역을 가지고 있으며 각각의 위치영역은 고유의 범위와 크기를 지닌다. 위킹셋의 효율적 운영을 통해 각 이동국이 가지는 위치영역내의 셀의 수를 최소화하고 호호출에 대한 페이징 비용을 감소할 수 있을 뿐만 아니라 많은 통화량을 갖는 개별적인 이동국에 대해 요구되는 셀들을 그룹화하여 하나의 유연한 위치영역으로 관리하므로서 위치등록 갱신비용을 감소시킬 수 있다. 이러한 위치등록 및 갱신 비용을 줄이기 위해 워킹셋의 크기를 결정하는 것이 중요한 문제이다. 제안된 방법은 UPT(Universal Personal Telecommunication)나 FPLMTS(Future Public Land Mobile Telecommunication System)와 같은 새로운 무선통신망 시스템에 효율적으로 적용이 가능할 것으로 생각된다. In this paper, an efficient location registration method using the multi-level walking set concept is proposed. A location area is a group of contiguous cells visited recently by individual mobile station. In this concept, this group of cells define a working set of mobile stations. Each mobile station has its own location area, and each location area has its own outline and size. Through the management of working sets, paging cost for incoming call is decreased by minimizing the number of cells in a mobile station's own location area, and the location update cost of highly activated mobile stations is decreased by grouping all the necessary cells into a single flexible location area. To decrease the paging and the location update cost, decision of working set size is a very important factor. We introduce a method that is an efficient location registration using multi-level working sets. Results of an efficient location updating using multi-level working sets that are applicable to cellular radio systems of the 3rd like UPT and FPLMTS are given.

Directory Service Agent를 이용한 World Wide Web의 지능화

안요찬 대전대학교 인문과학연구소 1999 人文科學論文集 Vol.28 No.-

東醫寶鑑 風門의 中風處方에 對한 分析

康永祿,安澤源,薛仁燦,黃致元 대전대학교 한방병원 2000 惠和醫學 Vol.9 No.1

1. The prescriptions used for jungkyo˘onglagjuˇng(中經絡症) are more frequently used than jungjangbujuˇng(中臟腑症) and also there are many prescriptions for pungdamjoˇlak(風痰阻絡) in the prescriptions used for jungkyo˘nglagjuˇng(中經絡症). 2. The frequency of source of prescriptions is dangyesimboˇb(丹溪心法), uˇihakibmun(醫學入門), taepyo˘nghyeminhwajekukbang(太平惠民和劑局方), manbyo˘nghoechun(萬病回春) in sequence. 3. The classification of prescriptions by efficacy is cho˘ngyo˘lyak(淸熱藥), boikyak(補益藥), haepyoyak(解表藥), hwadampyo˘ngcho˘nyak(化痰平喘藥), go˘pungsu˘byak(祛風濕藥), hwalhyo˘lgo˘o˘yak(活血祛瘀藥), igiyak(理氣藥), pyo˘ngganyak(平肝藥), etc., in sequence, and the frequency of used medicines is bangpung(防風), cho˘ngung(川芎), danggwi(當歸), ganghwal(羌活), insam(人蔘), bakcul(白朮), bakgi(白芷), banha(半夏), mahwang(麻黃), etc., in sequence. 4. The so˘ng(性) of used medicines is mainly onso˘ng(溫性) and hanso˘ng(寒性), the mi(味) is sinmi(辛味), gomi(苦味) in sequence, the gwigyo˘ng(歸經) is gangyo˘ng(肝經), Paegyo˘ng(肺經), bigyo˘ng(脾經), simgyo˘ng(心經), singyo˘ng(腎經), etc., in sequence.

流域特性을 考慮한 流出 모델링에 관한 硏究

金治弘,安元植,韓成大,尹如松 成均館大學校 科學技術硏究所 1985 論文集 Vol.36 No.1

This study have been carried out as a sector of the rainfall-runoff relationship research. First of all, the runoff research has the difficult problem due to non-linearity of hydrological phenomena. In this study, according to the method of runoff separation into components by Hino and Hasebe (1980) is applied. This theory considers sufficiently the physical mechanism of runoff process to separate into the groundwater, interflow, and surfaceflow, respectively. Then each component of runoff time series can be reduced to the linear subsystem, that is, ARMA model can be obtained in each subsystem. Actual flood hydrograph of the every two major gauging stations in the Han River basin, the Naktong River basin and the Kum River have been analyzed, and have taken out the characteristics of each river basin. Also the runoff model have obtained for these basins.

BK polyomavirus-associated nephropathy

Ahn, Yo Han,Kang, Hee Gyung Korean Society of Pediatric Nephrology 2022 Childhood kidney diseases Vol.26 No.1

BK polyomavirus (BKPyV) is a ubiquitous virus residing in the kidney tubules and is clinically significant only in immunocompromised patients. In clinical practice, BKPyV is a causative pathogen of BKPyV-associated nephropathy (BKVAN) in kidney allograft recipients or hemorrhagic cystitis of hematopoietic stem cell transplant recipients. Currently, there is no effective treatment for BKVAN; therefore, careful monitoring and prudent modification of immunosuppression are necessary to prevent BKVAN. In this article, the epidemiology, pathophysiology, and current management strategies for BKVAN are reviewed.

Risk Factors for the Progression of Chronic Kidney Disease in Children

Ahn, Yo Han,Kang, Hee Gyung,Ha, Il-Soo Korean Society of Pediatric Nephrology 2021 Childhood kidney diseases Vol.25 No.1

Chronic kidney disease (CKD) in children is associated with various complications, including poor growth and development, mineral bone disorder, cardiovascular disease, kidney failure, and mortality. Slowing down the progression of CKD is important since CKD is often not curable. Prospective cohort studies have been conducted to understand the progression and outcomes of CKD in children, and these studies have identified non-modifiable and modifiable risk factors. Recognition of known risk factors and early intervention are important to delay the progression of kidney function decline in children.

Identification of Differentially Expressed Genes in Murine Hippocampus by Modulation of Nitric Oxide in Kainic Acid-induced Neurotoxic Animal Model

Yo Ahn Suh,O Min Kwon,So Young Yim,Hee Jae Lee,Sung-Soo Kim 대한생리학회-대한약리학회 2007 The Korean Journal of Physiology & Pharmacology Vol.20 No.3

Kainic acid (KA) causes neurodegeneration, but no consensus has been reached concerning its mechanism. Nitric oxide may be a regulator of the mechanism. We identified differentially expressed genes in the hippocampus of mice treated with kainic acid, together with or without L-NAME, a nonselective nitric oxide synthase inhibitor, using a new differential display PCR method based on annealing control primers. Eight genes were identified, including clathrin light polypeptide, TATA element modulatory factor 1, neurexin III, ND4, ATPase, H+ transporting, V1 subunit E isoform 1, and N-myc downstream regulated gene 2. Although the functions of these genes and their products remain to be determined, their identification provides insight into the molecular mechanism(s) involved in KA-induced neuronal cell death in the hippocampal CA3 area.

Fatal Brain Herniation in Bilateral Chronic Subdural Hematoma

Yo Han Ahn,JongKyu Kim,Seok Won Kim 대한신경손상학회 2022 Korean Journal of Neurotrauma Vol.18 No.2

Despite its benign nature, chronic subdural hematoma (SDH) can be fatal if surgical intervention is delayed. Here, we report on bilateral chronic SDH in an 84-year-old man who died of duret hemorrhage in the brain stem and ischemia in the occipital and temporal lobes. We discuss the necessity for urgent surgical intervention to treat bilateral chronic SDH, and provide a review of the relevant literature.

Perceived Health Status and Health Promoting Behaviors among University Students

Ahn, Yo-Chan,Park, Hyun-Suk,Ra, Gyu-Won The Society of Korean Medicine 2014 대한한의학회지 Vol.35 No.4

Objectives: This study aimed to investigate the relationship among perceived health status, dietary habit and health promoting behaviors of university students. Methods: The subjects were 464 university students. Data were collected by using self-reported questionnaires. The results were analyzed using descriptive statistics, t-test, ANOVA, Pearson's correlation coefficient and multiple regression analysis with the PASW 18.0 program. Results: The mean score of perceived health status was 3.24, dietary habit was 2.85 and health promoting behaviors was 2.24. There were significant differences in perceived health status according to gender, BMI, exercise and stress. There were significant differences in dietary habit according to residence, monthly allowance, drinking alcohol, exercise, sleeping hours and stress. In addition there were significant differences in health promoting behaviors according to gender, residence, BMI, smoking and exercise. Also, perceived health status significantly positively correlated between dietary habit and health promoting behaviors. Conclusions: As the results of multiple regression analysis, the related factors of perceived health status of university students were exercise, stress and spiritual growth factor. Therefore, it is necessary to develop multiple health promoting programs considering characteristics of university students. And various strategies have been developed to increase the physical activity should be run.

Optimal hemodialysis treatment for pediatric kidney failure patients

Ahn Yo Han 대한소아청소년과학회 2023 Clinical and Experimental Pediatrics (CEP) Vol.66 No.3