• Title/Summary/Keyword: IS-95

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PCS Research and Development in Shinsegi Telecomm. Inc. (신세기통신의 PCS 연구개발현황)

  • 박용길;정동근;이도영
    • Information and Communications Magazine
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    • v.12 no.8
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    • pp.53-64
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    • 1995
  • In this article, criteria and considerations for selecting a domestic Personal Communications Services (PCS) system in Korea are presented and upbanded IS-95 Common Air Interface (CAI) is asserted to be appropriate as a result of evaluation by the criteria. And Shinsegi Telecomm, Inc. (STI) is claimed to be a suitable operator to provide PCS by upbanded IS-95 considering the experiences as the cellular operator adopting IS-95 CDMA technology. The PCS R&D plan and strategies of STI are given and the joint R&D plan with domestic manufacturers to develop PCS systems are explained. The results from R&D so far are mentioned. The PCS network architecture and various services-basic voice service, value-added services and wireless data services-are discussed.

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The relationship between smoking and depressive symptoms among Korean adults (한국인에서 흡연과 우울증상의 연관성)

  • Sung, Han Na;Kim, Jong Sung
    • Korean Journal of Health Education and Promotion
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    • v.33 no.2
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    • pp.57-66
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    • 2016
  • Objectives: This study investigated the relationship between smoking status and depressive symptoms among Korean adults. Methods: We used the data of 17,871 adults aged 19 years or older from the fifth Korea National Health and Nutrition Examination Survey(2010-2012). The subjects were classified as nonsmokers, former smokers, and current smokers by gender. Logistic regression analysis was used to calculate the odds ratios(ORs) and the 95% confidence intervals(CIs) for the effects of smoking status on depressive symptoms, and depression diagnosed by a doctor. Results: Compared to nonsmokers, the ORs of depressive symptoms for current smokers were 1.11(95% CI, 1.11-1.12) among males, and 1.64(95% CI, 1.63-1.64) among females. Compared to former smokers, the ORs of depressive symptoms for current smokers were 1.05(95% CI, 1.05-1.05) among males, and 1.89(95% CI 1.88-1.90) among females. Compared to nonsmokers, the ORs of depression for current smokers were 0.94(95% CI, 0.94-0.95) among males, and 1.40(95% CI, 1.39-1.41) among females. Compared to former smokers, the ORs of depression for current smokers were 1.09(95% CI, 1.09-1.10) among males, and 0.99(95% CI, 0.99-1.00) among females. Conclusions: Smoking is associated with depressive symptoms among Korean adults. Therefore, it is necessary to consider depressive symptoms with the management of tobacco control policies.

Changes in the Hospital Standardized Mortality Ratio Before and During the COVID-19 Pandemic: A Disaggregated Analysis by Region and Hospital Type in Korea

  • EunKyo Kang;Won Mo Jang;Min Sun Shin;Hyejin Lee;Jin Yong Lee
    • Journal of Preventive Medicine and Public Health
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    • v.56 no.2
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    • pp.180-189
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    • 2023
  • Objectives: The coronavirus disease 2019 (COVID-19) pandemic has led to a global shortage of medical resources; therefore, we investigated whether COVID-19 impacted the quality of non-COVID-19 hospital care in Korea by comparing hospital standardized mortality rates (HSMRs) before and during the pandemic. Methods: This retrospective cohort study analyzed Korean National Health Insurance discharge claim data obtained from January to June in 2017, 2018, 2019, and 2020. Patients' in-hospital deaths were classified according to the most responsible diagnosis categories. The HSMR is calculated as the ratio of expected deaths to actual deaths. The time trend in the overall HSMR was analyzed by region and hospital type. Results: The final analysis included 2 252 824 patients. In 2020, the HSMR increased nationwide (HSMR, 99.3; 95% confidence interval [CI], 97.7 to 101.0) in comparison to 2019 (HSMR, 97.3; 95% CI, 95.8 to 98.8). In the COVID-19 pandemic zone, the HSMR increased significantly in 2020 (HSMR, 112.7; 95% CI, 107.0 to 118.7) compared to 2019 (HSMR, 101.7; 95% CI, 96.9 to 106.6). The HSMR in all general hospitals increased significantly in 2020 (HSMR, 106.4; 95% CI, 104.3 to 108.5) compared to 2019 (HSMR, 100.3; 95% CI, 98.4 to 102.2). Hospitals participating in the COVID-19 response had a lower HSMR (HSMR, 95.6; 95% CI, 93.9 to 97.4) than hospitals not participating in the COVID-19 response (HSMR, 124.3; 95% CI, 119.3 to 129.4). Conclusions: This study suggests that the COVID-19 pandemic may have negatively impacted the quality of care in hospitals, especially general hospitals with relatively few beds. In light of the COVID-19 pandemic, it is necessary to prevent excessive workloads in hospitals and to properly employ and coordinate the workforce.

Blood Pressure and the Risk of Death From Non-cardiovascular Diseases: A Population-based Cohort Study of Korean Adults

  • Choi, Jeoungbin;Jang, Jieun;An, Yoonsuk;Park, Sue K.
    • Journal of Preventive Medicine and Public Health
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    • v.51 no.6
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    • pp.298-309
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    • 2018
  • Objectives: The objective of this study was to assess the relationship between systolic and diastolic blood pressure (SBP, DBP) and the risk of death from specific causes other than cardiovascular diseases. Methods: We calculated the risk of specific death by SBP and DBP categories for 506 508 health examinees in 2002-2003 using hazard ratios (HRs) and 95% confidence intervals (CIs) in a Cox proportional hazards model. Results: Compared to normal levels (SBP <120 or DBP <90 mmHg), stage I systolic and diastolic hypertension (SBP 140-159, DBP 85-89 mmHg, respectively) were associated with an increased risk of death from diabetes mellitus, alcoholic liver disease, and renal failure (HR, 1.83; 95% CI, 1.51 to 2.22; HR, 1.24; 95% CI, 1.06 to 1.46; HR, 2.30; 95% CI, 1.64 to 3.21; HR, 1.67; 95% CI, 1.27 to 2.20; HR, 1.99; 95% CI, 1.41 to 2.81; HR, 1.31; 95% CI, 0.99 to 1.73, respectively), but a decreased risk of death from intestinal pneumonia (HR, 0.64; 95% CI, 0.42 to 0.98; HR, 0.59; 95% CI, 0.39 to 0.91). Only stage II systolic hypertension (SBP ${\geq}160mmHg$) was associated with an increased risk of death from pneumonia, liver cirrhosis, and intestinal ischemia (HR, 1.54; 95% CI, 1.19 to 1.98; HR, 1.46; 95% CI, 1.00 to 2.15; HR, 3.77; 95% CI, 1.24 to 11.40, respectively), and stage I and II diastolic hypertension (SBP 140-159 and ${\geq}160mmHg$) were associated with an increased risk of death from intestinal ischemia (HR, 3.07; 95% CI, 1.27 to 7.38; HR, 4.39; 95% CI, 1.62 to 11.88, respectively). Conclusions: An increase in blood pressure levels may alter the risk of death from certain causes other than cardiovascular diseases, a well-known outcome of hypertension, although the mechanism of these associations is not well documented.

The Investigation of Risk Factors Impacting Breast Cancer in Guilan Province

  • Joukar, Farahnaz;Ahmadnia, Zahra;Atrkar-Roushan, Zahra;Hasavari, Farideh;Rahimi, Abbas
    • Asian Pacific Journal of Cancer Prevention
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    • v.17 no.10
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    • pp.4623-4629
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    • 2016
  • Introduction: Breast cancer is multifactorial therefore more recognition of risk factors is important in its prevention. Objective: This study was conducted in order to determine the factors influencing breast cancer in women referred to health centers in Guilan province in 2015-2016. Method: In a case- control study, 225 women with breast cancer were investigated. The control group consisted of 225 healthy women of the relatives (third-rank) whose phone numbers were obtained from the patients. Data were collected through telephone interviews. Results: The risk of breast cancer raised in women who have a family history of other cancers (OR= 3.5; 95% CI= 1.96-6.6), exposure to X-Ray (OR= 2.5; 95% CI=1.1-5.5), having more than 4 children (OR= 2.695% CI=1.2-4.8), age more than 36 years at first pregnancy(OR=2.3; 95% CI=0.7-5.1),primary levelof education (OR= 5.4;95% CI=2.8-11.2) and inadequate intake of fruit (OR=1.5; 95% CI=1-2.2). Also, presence of the following factors reduced breast cancer risk: regular menstruation (OR= 0.66; CI=0.4-0.9), duration of breastfeeding more than 12 months, less than 6 months and 7-12 months (OR=0.23; 95% CI=0.09-0.59, OR=0.29; 95% CI=0.17-0.49 and OR=0.03; 95% CI=0.01-0.08) and parity (OR=0.4; 95% CI=0.27-0.83) In multiple linear regression analysis of higher education (OR=0.16; 95% CI=0.03-0.77), using contraceptives for more than 16 years (OR=2.3; 95% CI=1.4-3.9), family history of other cancers (OR=6.1; 95% CI=1.9-19.3) and a history of X-Ray exposure (OR=4.4; 95% CI=1.07-18.1) were considered as predictive factors. Conclusion: The results of this study emphasize the importance of informing women about breast cancer risk factors. So, identification of these risk factors is required as important means of prevention and treatment of breast cancer.

Distinct Regional and Cellular Localization of Hyperpolarization-activated Cyclic Nucleotide-gated Channel 1 in Cerebellar Cortex of Rat

  • Kwon, Young-Joon;Kim, Tae-Sung
    • Journal of Korean Neurosurgical Society
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    • v.42 no.3
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    • pp.205-210
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    • 2007
  • Objective : Hyperpolarization-activated cyclic nucleotide-gated (HCN) channels mediate the hyperpolarization-activated currents (Ih) that participate in regulating neuronal membrane potential and contribute critically to pacemaker activity, promoting synchronization of neuronal networks. However, distinct regional and cellular localization of HCN channels in the brain have not been precisely defined. Aim of this study was to verify the precise cellular location of HCN1 channels in rat cerebellum to better understand the physiological role these channels play in synaptic transmission between CNS neurons. Methods : HCN1 expression in rat brain was analyzed using immunohistochemistry and electron-microscopic observations. Postsynaptic density-95 (PSD-95), otherwise known as locating and clustering protein, was also examined to clarify its role in the subcellular location of HCN1 channels. In addition, to presume the binding of HCN1 channels with PSD-95, putative binding motifs in these channels were investigated using software-searching method. Results : HCN1 channels were locally distributed at the presynaptic terminal of basket cell and exactly corresponded with the location of PSD-95. Moreover, nine putative SH3 domain of PSD-95 binding motifs were discovered in HCN1 channels from motif analysis. Conclusion : Distinct localization of HCN1 channels in rat cerebellum is possible, especially when analyzed in conjunction with the SH3 domain of PSD-95. Considering that HCN1 channels contribute to spontaneous rhythmic action potentials, it is suggested that HCN1 channels located at the presynaptic terminal of neurons may play an important role in synaptic plasticity.

Improvement of ELV Recycling Technology - Focused on achievement of ELV recycling rate 95% - (자동차 재활용의 진보 - 자동차 재활용율 95%의 탐색 -)

  • Oh, Jae-Hyun
    • Resources Recycling
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    • v.23 no.2
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    • pp.71-80
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    • 2014
  • In order to survey the numerical achievement of ELV recycling rate 95%, the definition of ELV recycling rate, material components of the automobile, improvement of ELV dismantling technology and status of ASR recycling were reviewed. On the other hand, field survey in details for dismantling works were conducted at Incheon Junkyard and H Junkyard. Although material recycling rate has been approaching 94% in dismantling step, status of ASR recycling is very unstable due to a ban of ASR recycling at cement kiln. It is clear that ASR recycling acts as a bottle neck in the ELV recycling. Therefore, it is important energy recycling of ASR should be enlarged to achieve ELV recycling rate 95%.

Gnu Ada'95 Runtime Library (GNARL): Tasking Implementation and Performance Improvement (Gnu Ada'95 런타임 라이브러리 (GNARL): 태스킹의 구현과 성능향상)

  • Moon, Seung-Jin;Oh, Dong-Ik
    • The Transactions of the Korea Information Processing Society
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    • v.5 no.11
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    • pp.2809-2822
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    • 1998
  • GNARL is the runtime system of the Gun NYU Ada'95 compiler(GNAT). It implements the multi-tasking features of the Ada programming language and together they provide a freely available test-bed for experimentation in language, compiler, and runtime support for real-time programming. In this paper, we give an overview of GNAT and GNARL. We then describe the results of our research toward improving efficiency, predictability, and reliability of Ada'95 multi-tasking.

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Quality Measurement Algorithm for IS-95 Reverse-link Signal (IS-95 역방향링크 신호의 품질 측정 알고리즘)

  • Kang, Sung-Jin;Kim, Nam-Yong
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.11 no.9
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    • pp.3428-3434
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    • 2010
  • In this paper, we proposed and implemented a quality measurement algorithm for IS-95 reverse-link signal. To measure the quality of the received signal, equalization, carrier frequency/phase offset estimation, and timing synchronization are essential. And, all signal processing are carried out with baseband signal. The equalizer works with 4-oversampled samples to remove ICI(InterChip Interference). The frequency/phase offset estimator is followed by timing synchronizer since it can work without aid of data and timing information. As the number of interpolation in timing synchronization increases, the measurement accuracy improves, but computation load increases simultaneously. Therefore, one need to choose adequately the number of interpolation regarding to the platform performance to be used for the proposed algorithm.

ABO Blood Groups and Risk of Cancer: a Systematic Review and Meta-analysis

  • Zhang, Bai-Lin;He, Na;Huang, Yu-Bei;Song, Feng-Ju;Chen, Ke-Xin
    • Asian Pacific Journal of Cancer Prevention
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    • v.15 no.11
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    • pp.4643-4650
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    • 2014
  • Background: For decades, studies have been performed to evaluate the association between ABO blood groups and risk of cancer. However, whether ABO blood groups are associated with overall cancer risk remains unclear. We therefore conducted a meta-analysis of observational studies to assess this association. Materials and Methods: A search of Pubmed, Embase, ScienceDirect, Wiley, and Web of Knowledge databases (to May 2013) was supplemented by manual searches of bibliographies of key retrieved articles and relevant reviews. We included case-control studies and cohort studies with more than 100 cancer cases. Results: The search yielded 89 eligible studies that reported 100,554 cases at 30 cancer sites. For overall cancer risk, the pooled OR was 1.12 (95%CI: 1.09-1.16) for A vs. non- A groups, and 0.84 (95%CI: 0.80-0.88) for O vs. non-O groups. For individual cancer sites, blood group A was found to confer increased risk of gastric cancer (OR=1.18; 95%CI: 1.13-1.24), pancreatic cancer (OR=1.23; 95%CI: 1.15-1.32), breast cancer (OR=1.12; 95%CI: 1.01-1.24), ovarian cancer (OR=1.16; 95%CI: 1.04-1.27), and nasopharyngeal cancer (OR=1.17; 95%CI: 1.00-1.33). Blood group O was found to be linked to decreased risk of gastric cancer (OR=0.84; 95%CI: 0.80-0.88), pancreatic cancer (OR=0.75; 95%CI: 0.70-0.80), breast cancer (OR=0.90; 95%CI: 0.85-0.95), colorectal cancer (OR=0.89; 95%CI: 0.81-0.96), ovarian cancer (OR=0.76; 95%CI: 0.53-1.00), esophagus cancer (OR=0.94; 95%CI: 0.89-1.00), and nasopharyngeal cancer (OR=0.81; 95%CI: 0.70-0.91). Conclusions: Blood group A is associated with increased risk of cancer, and blood group O is associated with decreased risk of cancer.