Musculoskeletal diseases of heavy industrial workers

Baek, Hyunjin,Song, Sunhae,Lee, Donggeon,Pyo, Seunghyeon,Shin, Doochul,Lee, Gyuchang korean Academy of Physical Therapy Rehabilitation 2017 Physical therapy rehabilitation science Vol.1 No.1

Objective: The purpose of this study was to investigate the musculoskeletal diseases (MSDs) that occur in heavy industrial workers according to the occupational category, prevalence, environment, and number of physical therapy visits. Design: Retrospective cohort study. Methods: For this study, data was collected of workers who were engaged in heavy industry in Korea and who visited the company physicians and received physical therapy in 2016. Data was collected from 855 subjects and was analyzed. With the data collected, analysis of the type and prevalence of MSDs and the number of physical therapy visits that have occurred according to the occupational category and environment was performed. Results: The most common MSDs were lumbar sprains and spasms (31.1%), and shoulder sprain and spasm (19.4%). In addition, the most common type of MSDs according to the occupational category and environment (occupational type) were lumbar sprain and spasms in 11 occupations, including white collar workers, and in milling, inspection, crane operation, and finishing jobs, shoulder muscle sprain and strain were the most common disorders. Also, the prevalence of MSDs according to occupational category and environment (occupational type) was the highest in workers involved with welding, which was 29.7%. Conclusions: Through this study, the type and prevalence of MSDs according to the occupational category and environment of heavy industrial workers have been confirmed. Further studies are necessary to study the future types of the work patterns of industrial workers and to develop a system for preventing and managing MSDs that may occur.

Musculoskeletal diseases of heavy industrial workers

( Hyunjin Baek ),( Sunhae Song ),( Donggeon Lee ),( Seunghyeon Pyo ),( Doochul Shin ),( Gyuchang Lee ) 물리치료재활과학회 2017 Physical therapy rehabilitation science Vol.6 No.2

Objective: The purpose of this study was to investigate the musculoskeletal diseases (MSDs) that occur in heavy industrial workers according to the occupational category, prevalence, environment, and number of physical therapy visits. Design: Retrospective cohort study. Methods: For this study, data was collected of workers who were engaged in heavy industry in Korea and who visited the company physicians and received physical therapy in 2016. Data was collected from 855 subjects and was analyzed. With the data collected, analysis of the type and prevalence of MSDs and the number of physical therapy visits that have occurred according to the occupational category and environment was performed. Results: The most common MSDs were lumbar sprains and spasms (31.1%), and shoulder sprain and spasm (19.4%). In addition, the most common type of MSDs according to the occupational category and environment (occupational type) were lumbar sprain and spasms in 11 occupations, including white collar workers, and in milling, inspection, crane operation, and finishing jobs, shoulder muscle sprain and strain were the most common disorders. Also, the prevalence of MSDs according to occupational category and environment (occupational type) was the highest in workers involved with welding, which was 29.7%. Conclusions: Through this study, the type and prevalence of MSDs according to the occupational category and environment of heavy industrial workers have been confirmed. Further studies are necessary to study the future types of the work patterns of industrial workers and to develop a system for preventing and managing MSDs that may occur.

금융소비자 공적불만호소행동과 피해구제에 관한 연구 - 금융분쟁조정위원회 피해구제 사례분석 -

백현진 ( Baek Hyunjin ),최현자 ( Choe Hyuncha ) 한국금융소비자학회 2019 금융소비자연구 Vol.9 No.1

금융소비자들의 불만이 좀처럼 줄어들지 않고 있는 상황에서 본 연구는 금융분쟁조정위원회 피해구제 사례를 대상으로 금융소비자 공적불만호소행동과 피해구제의 특성을 구체적으로 파악하고, 각 특성이 피해구제 결과에 미치는 영향을 분석하여 금융소비자의 불만을 최소화하고 효율적으로 피해를 구제할 수 있는 방안 마련에 이바지하고자 하였다. 연구결과, 금융소비자가 불만을 호소한 금융상품은 보장성 상품이 과반 이상을 차지하였고 불만원인 대부분은 계약중 발생한 것으로 나타났다. 결정내용별로는 대체로 금융소비자에게 유리한 결정이 보다 많은 것으로 나타났으나 분쟁조정 결정에 있어 문답이나 자문 등의 추가절차를 실시한 경우나 금융소비자의 개인적 특성을 고려한 경우는 드문 것으로 나타났다. 그리고 공적불만호소행동 특성 중에는 금융상품과 요구내용에 따라, 분쟁관리 특성 중에는 관련 법규 적용 여부와 금융소비자 특성 고려 여부에 따라 피해구제 결과에 통계적으로 유의미한 차이가 있었다. In a situation where complaints from financial consumers have rarely decreased, this study was designed to contribute to measures to minimize complaints from financial consumers and to effectively remedy damage by analyzing the characteristics of public complaining behavior of financial consumer and damage relief and analyzing the impact of each characteristic on the outcome of damage relief through 436 cases in the case book of Financial Disputes Settlement Committee. As a result of the study, it was found that the financial products that the financial consumers complained about were more than half of the insurance products and most of the complaints occurred during the contract. And more decisions were found to be favorable to financial consumers. However, it was rare to consider the personal characteristics of financial consumers or additional procedures such as question-and-answer and consultation. In addition, it was found that among the characteristics of public complaints behavior, there were statistically significant differences in the outcome of the damage relief due to financial instruments and requirements. And among the characteristics of dispute management, statistically significant differences were found in the results of damage relief according to the application of related laws and the consideration of financial consumer characteristics.

보험시장에서의 거래구조 문제와 소비자보호제도에 대한 소비자평가 연구

백현진(Hyunjin Baek),손지연(Jiyeon Son),최현자(Hyuncha Choe) 한국FP학회 2020 Financial Planning Review Vol.13 No.2

본 연구는 한국소비자원의 대규모 소비자조사인 「2017 소비자시장평가지표」 원자료(N=1,000)를 활용하여 생명보험과 손해보험 시장의 거래구조 문제와 소비자보호제도에 대해 소비자가 어떻게 평가하고 있는지 살펴보고, 이들 간의 관계를 규명한 것이다. 주요 연구결과는 다음과 같다. 먼저 생명보험과 손해보험 모두에 있어 정보비대칭에 대한 문제인식, 교섭력차이에 대한 문제인식 그리고 이해상충에 대한 문제인식 각각의 평균점수는 큰 차이가 없었다. 그리고 보험소비자보호제도에 대한 소비자평가는 생명보험 및 손해보험에 있어 각 10점 만점에 평균 8.19점과 8.25점으로 나타났다. 다음으로 거래구조 문제에 대한 소비자인식이 소비자보호제도에 대한 소비자의 평가에 미치는 영향을 분석한 결과, 생명보험과 손해보험 모두에서 정보비대칭에 대한 문제인식의 영향력이 가장 크게 나타났으며, 교섭력차이에 대한 문제인식, 그리고 이해상충에 대한 문제인식이 그 뒤를 잇는 것으로 나타났다. 이상의 분석 결과는 소비자의 시각과 눈높이에서 보험시장에 대한 소비자보호제도를 평가한 결과를 분석한 것으로, 보험시장에서의 소비자지향성을 향상시키기 위해서는 거래구조 문제 중 정보비대칭 문제가 가장 우선적으로 해소되어야 함을 시사한다. 본 연구의 결과는 보험시장에서의 소비자보호제도를 소비자가 희망하는 방향으로 추진하기 위해 필요한 보완책을 마련하는데 기여할 수 있다. It is well-known that the transaction structure of insurance markets includes three types of consumer issues: information asymmetry, differences in bargaining power, and conflicts of interest. Using the data from “Consumer Markets Evaluation Indicators in Korea” generated by the Korea Consumer Agency in 2017, this study aimed to examine the relationship between consumers’ evaluation of transaction structure and consumers’ evaluation of consumer protection systems, with respect to life and non-life insurance markets. First, in both life and non-life insurance markets, no significant differences were exhibited amongst the levels of consumer evaluation of the three types of consumer issues. Moreover, the average consumer evaluation of the consumer protection system was 8.19/10 for the life insurance market and 8.25/10 for the non-life insurance market. Second, the results of the regression analyses of factors affecting consumer evaluation of the consumer protection system in life and non-life insurance markets reveal that information asymmetry had the highest impact among the three types of consumer issues. In other words, policy makers should reduce the level of information asymmetry with priority, in order to enhance the consumer evaluation level of consumer protection systems in life and non-life insurance markets. This study can provide valuable insights for policy makers who want to develop consumer-oriented consumer protection strategies in insurance markets.

Identify the important features by Random Forest Model when deciding the chemotherapy for colorectal cancer patients

Hyunjin Kwon,Jinhyeok Park,Youngho Lee,Jeong-Heum Baek 대한종양외과학회 2020 대한임상종양학회 학술대회지 Vol.2020 No.7

Assessment of the Adsorption Capacity of Chemical treatment Paper-Mill-Sludge on Cadmium

Baek, Jongchan(백종찬),Shin, Hyunjin(신현진),Park, Junboum(박준범) 대한토목학회 2013 대한토목학회 학술대회 Vol.2013 No.10

A Linear InGaP/GaAs HBT Power Amplifier Using Parallel-Combined Transistors With IMD3 Cancellation

Baek, Seungjun,Ahn, Hyunjin,Nam, Ilku,Ryu, Namsik,Lee, Hui Dong,Park, Bonghyuk,Lee, Ockgoo THE INSTITUTE OF ELECTRICAL ENGINEERS 2016 IEEE Microwave and Wireless Components Letters Vol. No.

<P>In this letter, we present a linear InGaP/GaAs HBT power amplifier (PA) with parallel-combined transistors for small-cell applications. Ballast resistors with bypass resistors and capacitors are employed in parallel-combined transistors. When the resistors and capacitors are set to appropriate values, IMD3 components of the parallel-combined transistors are found to be out of phase with each other by 180. and are canceled out at the output. The experimental results show that the proposed HBT PA with parallel-combined transistors produces a saturated output power of 33.5 dBm at 0.88 GHz, with a power-added efficiency (PAE) of 46.1% at a 5-V supply voltage. To validate the effectiveness of the proposed HBT PA for linearity improvement, the implemented PA is also tested with a long-term evolution (LTE) signal (8.1-dB PAPR with 10-MHz bandwidth). The proposed PA achieves an adjacent channel leakage ratio (ACLR) below -45 dBc at an average power of 25.6 dBm with a PAE of 18.8% without applying predistortion.</P>

The Flatness Property of Local-cubically Hyponormal Weighted Shifts

Baek, Seunghwan,Do, Hyunjin,Lee, Mi Ryeong,Li, Chunji Department of Mathematics 2019 Kyungpook mathematical journal Vol.59 No.2

In this note we introduce a local-cubically hyponormal weighted shift of order ${\theta}$ with $0{\leq}{\theta}{\leq}{\frac{\pi}{2}}$, which is a new notion between cubic hyponormality and quadratic hyponormality of operators. We discuss the property of flatness for local-cubically hyponormal weighted shifts.

Late-Onset Granulomatous Pneumocystis jirovecii Pneumonia in A Renal Transplant Recipient: A Clinical Grand Round Conference Case in 2022

Baek Yae Jee,Kim Kyeongmin,Nam Bo Da,Jung Jongtak,Lee Eunjung,Noh Hyunjin,Kim Tae Hyong 대한감염학회 2023 Infection and Chemotherapy Vol.55 No.3

Late-onset Pneumocystis jirovecii pneumonia (PCP) can be developed in solid organ transplant (SOT) patients. Granulomatous P. jirovecii pneumonia (GPCP) can occur in immunocompromised patients, but has rarely been reported in SOT recipients. The diagnosis of GPCP is difficult since the sensitivity of sputum and bronchoalveolar lavage is low and atypical patterns are shown. A 60-year-old man, who had undergone renal transplantation 24 years ago presented with nodular and patchy lung lesions. He was asymptomatic and stable. After empirical treatment with a fluoroquinolone, the condition partially resolved but relapsed 4 months later. The pulmonary nodule was resected, and GPCP was confirmed. The pathogenesis of GPCP remains unclear, but in SOT recipients presenting with an atypical lung pattern, GPCP should be considered. This case was discussed at the Grand Clinical Ground of the Korean Society of Infectious Disease conference on November 3, 2022.

2.3-GHz HBT Power Amplifier With Parallel-Segmented On-Chip Autotransformer

Ahn, Hyunjin,Choi, Se-Eun,Ryu, Hyunsik,Baek, Seungjun,Nam, Ilku,Lee, Ockgoo THE INSTITUTE OF ELECTRICAL ENGINEERS 2017 IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS Vol.27 No.12

<P>A parallel-segmented primary autotransformer is proposed to optimize passive efficiency as well as impedance transformation ratio. In addition, a corresponding equivalent lumped model has been proposed and shows a good agreement with electromagnetic -simulated and measured data. This paper also presents a fully integrated HBT power amplifier with a parallel-segmented primary autotransformer to obtain watt-level output power with low loss. The saturated output power of the power amplifier (PA) is 31 dBm at 2.3 GHz. The PA achieves output power of 24.84 dBm with adjacent channel leakage ratio of less than -40.4 dBc for LTE signal with a 10-MHz bandwidth and 7.3-dB PAPR.</P>