• Journal of Radiation Protection and Research
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• 제46권4호
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• pp.194-203
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• 2021

Background: Surface soil radiation monitoring around nuclear facilities is important to classify and characterize the contaminated areas. A scanning and direct measurement technique can survey the sites rapidly before starting sampling analysis. Materials and Methods: Regarding this, we test and suggest a measurement technique for gross alpha/beta and ⁹⁰Sr activities in surface soil based on a mobile ZnS(Ag)/PVT (polyvinyltoluene) array and a handheld PVT rod, respectively. To detect ⁹⁰Sr selectively in soil mixed with naturally occurring radioactive materials, chosen energy channel counts from the multichannel analyzers were used instead of whole channel counts. Soil samples contaminated with exempt liquid ⁹⁰Sr with 1 Bq·g^-1, 3 Bq·g^-1, and 10 Bq·g^-1 were prepared and hardened by flocculation. Results and Discussion: The mobile ZnS(Ag)/PVT array could discriminate gross alpha, gross beta, and gamma radiation by the different pulse-shaped signal features of each sensor material. If the array is deployed on a vehicle, the scan minimum detectable concentration (MDC) range will be about 0.11-0.17 Bq·g^-1 at 18 km·h^-1 speed, highly sensitive to actual sites. The handheld PVT rod with 12 mm (Φ) × 20 mm (H) size can directly measure ⁹⁰Sr selectively if channels on which energies are from 1,470 and 2,279 keV are gated, minimizing crossdetection of other radionuclides. These methods were verified by measuring soil samples fabricated with homogeneous ⁹⁰Sr concentrations, showing static MDC of 2.16 Bq·g^-1 at a measurement time of 300 seconds. Conclusion: Based on the results, comprehensive procedures using these detectors are suggested to optimize soil sites survey.

• Safety and Health at Work
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• 제13권2호
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• pp.207-212
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• 2022

Background: The public now imposes higher demands on the government than in the past, which has created the role overload faced by low-ranking government employees in China. This research investigates the relationship between role overload and health among low-ranking government employees and explores the mediating effects of burnout. Methods: It draws on a survey of 2064 low-ranking government employees by probability proportionate to size sampling in China's Shandong Province. Structural equation modeling (SEM) methods are used to analyze the data. Results: Both role overload and burnout were found to have negative effects on low-ranking government employees' health; however, the associations varied among the three age groups (less than 36, between 36 and 45, and over 45). Those over 45 reported the highest level of both physical and psychological health, while the youngest age group (less than 36) reported the lowest level of health. Role overload has a direct influence on health among government employees over 45 but not among those below 45. Burnout's mediating effects between role overload and health are significant among all age groups, but most significant among the youngest civil servants below 36. Conclusions: The findings evidenced that both role overload and burnout affect low-ranking government employees' self-reported physical and psychological health. In addition, the effect of age differences in coping with role stressors and burnout should be considered.

• 유통과학연구
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• 제21권1호
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• pp.85-93
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• 2023

Purpose: This research is intended to analyze how distribution of brand communication of a Soft Drink brand on brand image mediated through electronic word of mouth on packaged carbonated drink in Indonesian Gen-Z. This research also aims to find out how electronic word of mouth can have a role in creating a brand image for Indonesia Gen-Z. Research design, data and methodology: This research is using a quantitative approach with purposive sampling technique, a survey was conduct online and the number of samples being 384 responders who are spread all over Indonesia. The questionnaire construct was designed based on several variables, such as brand communication, brand image, and e-WOM. E-WOM was positioned as a mediating variable in this research. Brand Communication indicators consist of event and experience, public relation and publicity, direct marketing and personal selling. Meanwhile brand image consists of Attributes, Benefits, and Attitudes. E-WOM indicators consist of intensity, balance of opinion, and content. Results: The result of this research being (1) There is a significant influence between brand communication and brand image. (2) There is a significant influence between brand communication and electronic word-of-mouth. And (3) There is a significant influence between brand communication and brand image mediated through electronic word-of-mouth. Conclusion: The findings of this research prove that there is significant influence between brand communication, brand image and electronic word-of-mouth, this study also provide several information about how other factor affect the distribution of brand communication.

• International Journal of Computer Science & Network Security
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• 제23권7호
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• pp.1-8
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• 2023

An Orthogonal Frequency Division Multiplexing (OFDM) based wireless communication system has drawn wide attention for its high transmission rate and high spectrum efficiency in not only radio but also Underwater Acoustic (UWA) applications. Because of the narrow sub-carrier spacing of OFDM, orthogonality between sub-carriers is easily affected by Doppler effect caused by the movement of transmitter or receiver. Previously, Doppler compensation signal processing algorithm for Desired propagation path was proposed. However, other Doppler shifts caused by delayed Undesired signal arriving from different directions cannot be perfectly compensated. Then Receiver Bit Error Rate (BER) is degraded by Inter-Carrier-Interference (ICI) caused in the case of Multi-path Doppler channel. To mitigate the ICI effect, a modified Delay and Doppler Profiler (mDDP), which estimates not only attenuation, relative delay and Doppler shift but also sampling clock shift of each multi-path component, is proposed. Based on the outputs of mDDP, an ICI canceling multi-tap equalizer is also proposed. Computer simulated performances of one-tap equalizer with the conventional Time domain linear interpolated Channel Transfer Function (CTF) estimator, multi-tap equalizer based on mDDP are compared. According to the simulation results, BER improvement has been observed. Especially, in the condition of 16QAM modulation, transmitting vessel speed of 6m/s, two-path multipath channel with direct path and ocean surface reflection path; more than one order of magnitude BER reduction has been observed at CNR=30dB.

• 대한치과의료관리학회지
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• 제11권1호
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• pp.8-18
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• 2023

The purpose of this study is to examine the organizational culture of dental hospitals and clinics, as well as to assess members' perceptions and actual conditions related to sexual harassment. The research method involved conducting a cross-sectional survey of 149 dental hygienists using random sampling. The analysis utilized frequency analysis and descriptive statistical analysis. Regarding awareness of organizational culture within the workplace, 39.6% responded, "It is difficult to freely use maternity and childcare leave at our workplace". When asked about sexual harassment, 51.7% of respondents said they had received training on sexual harassment prevention. The highest level of sexual harassment experienced was "sexual analogy or evaluation of appearance", at 45.8%. The most common perpetrators of sexual harassment were agency heads and directors, at 37.5%. The most common behavior of the victim at the time was "changing the subject or avoiding the scene" (41.7%). 50.0% of victims of sexual harassment responded to the harm by "just putting up with it". The most common response to the direct and indirect impact of sexual harassment was "there was no specific impact". The most common response from the agency was "there were no suitable measures". Regarding the most necessary policy to prevent sexual harassment, "strict punishment for perpetrators (37.5%)" was the highest. There is a need for organizational and cultural changes to reduce sexual harassment in the workplace. Additionally, it is crucial for the country and society as a whole to actively participate in and improve the system.

• Human Ecology Research
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• 제62권1호
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• pp.101-120
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• 2024

This study aimed to examine the effect of adolescents' perceived parental blame (criticism) on learned helplessness and to examine whether maladaptive metacognitive beliefs and rumination sequentially mediate the relationship between parental blame and learned helplessness. The participants were 316 adolescents (Mean age=16.7, SD=0.75; 137 male, 179 female) attending grades 1st and 2nd in high school in South Korea. The participants were selected using a snowball sampling method, while the data was collected via an online self-report questionnaire. This survey was completed by the participants and analyzed using SPSS 28.0, Amos 26.0 (IBM Co., Armonk, NY), and PROCESS macro version 4.2 (Model 6; Hayes, 2022). The main results are summarized as follows. Firstly, the adolescents' perceived paternal and maternal blame indicated significant direct effects on learned helplessness. Secondly, rumination mediated the effect of paternal and maternal blame on learned helplessness. Lastly, paternal and maternal blame significantly affected learned helplessness through the sequential mediating effects of maladaptive metacognitive beliefs and rumination. This study elucidates the causal structure among the various factors influencing learned helplessness in adolescents, focusing on parental blame, maladaptive metacognitive beliefs, and rumination. Furthermore, considering the verified sequential mediating effects of maladaptive metacognitive beliefs and rumination in the relationship between adolescents' perceived parental blame and learned helplessness, these findings suggest that modifying maladaptive metacognitive beliefs may help to reduce learned helplessness among adolescents who perceive high levels of parental blame.

• 한국임상약학회지
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• 제34권2호
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• pp.126-133
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• 2024

Background: Medication's benefits and harms require careful management. Laws mandate pharmacists to provide essential medication details since inadequate counseling may pose risks. This study explores public expectations for pharmacist-provided side effect information to enhance safety. Methods: A self-developed questionnaire was created for participant to self-report, refined through pilot surveys with experts and laypersons. Nineteen items were categorized into four sections, using closed-ended questions. Adults over 20, having obtained prescription medications within the past year, were surveyed via convenience sampling. Data analysis employed descriptive statistics and T-tests using IBM SPSS Statistics 21 and Microsoft Excel. Results: The study involved 189 participants, with a slightly higher proportion of females (59.3%) than males (40.7%), predominantly in their 20s (45.0%) and college graduates (57.1%). Health professionals represented 76.2% of respondents. Over half visited pharmacies at least 5 times yearly for prescriptions. Indirect experience with side effects was more common (30.2%) than direct experience (17.5%). Most (82.0%) showed interest in media-reported side effect events. Satisfaction with pharmacist-provided side effect explanations was low (59.7%), but importance was high (98.9%). Preferences favored combined verbal and written explanations (65.1%), with a majority desiring explanations for common but less serious side effects (82.5%). Healthcare professionals found explanations significantly more sufficient than non-professionals did. Older individuals, those living with elderly, and frequent pharmacy visitors attributed greater importance to pharmacist-provided explanations. Conclusion: Koreans view pharmacist-provided medication side effect explanations as vital but find current services lacking. Enhancements in content and delivery methods are needed in pharmacy counseling to meet public expectations.

• 한국조경학회지
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• 제38권1호
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• pp.1-11
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• 2010

본 연구는 '도시공원의 공급인자가 도시공원의 이용 만족도에 미치는 영향은 무엇인가?'에 관한 연구의문에 해답을 제공하기 위하여 도시공원의 공급인자인 매력물, 서비스, 접근성, 정보, 촉진이 도시공원의 이용 만족도에 미치는 영향을 평가함을 연구목적으로 한다. 도시공원의 공급인자에 관한 이론적 고찰을 토대로 외부적 공급인자와 내부적 공급인자가 이용 만족도에 미치는 영향을 하나의 인과모형으로 구성한 개념적 틀을 구성하여 가설을 도출하였다. 연구가설의 실증적 검정을 위한 자료는 8개의 도시공원을 대상으로 할당추출방법을 사용하여 선정된 452명의 공원 이용자를 대상으로 설문조사를 통해 수집하였다. 불성실한 응답과 이상치를 제외한 356매가 분석에 사용되었다. 수집된 자료는 LISREL for Windows 8.72(Scientific Software International, Inc., 2006)와 SAS Ver. 9.1(SAS Institute Inc., 2002)을 이용하여 경로분석을 수행하였다. 도시공원의 공급인자의 평가 결과는 다음과 같다. 1) 외부적 공급인자인 접근성이 이용 만족도에 미치는 직접효과와 간접효과는 각각 0.184, 0.220으로 나타났다. 정보와 촉진이 이용 만족도에 미치는 직접효과는 없으나 간접효과는 각각 0.101, 0.177로 나타났다. 2) 내부적 공급인자인 서비스의 직접효과와 간접효과는 각각 0.130, 0.236인 반면 매력물의 직접효과는 0.698로 나타났다. 3) 도시공원 이용 만족도에 미치는 접근성, 서비스, 매력물의 직접효과의 크기는 각각 0.184, 0.130, 0.698로 57.96%를 구성하는 반면, 접근성, 정보, 촉진, 서비스의 간접효과의 크기는 각각 0.220, 0.101, 0.177, 0.236으로 42.04%이다. 4) 도시공원의 공급인자들이 도시공원의 이용 만족도(100.00%)에 미치는 인과효과의 크기는 매력물(39.98%), 접근성(23.14%), 서비스(20.96%), 촉진(10.14%), 정보(5.78%)의 순이다. 5) 도시공원의 외부적 공급인자인 접근성, 정보, 촉진의 효과는 39.06%인 반면, 내부적 공급인자인 서비스, 매력물의 효과는 69.94%로 나타났다. 연구를 통해 도시공원의 마케팅전략 수립과 기존의 조성된 도시공원 개량 방안을 마련하는데 유용한 지식을 얻었다. 특히, 이 연구에 적용된 방법론은 여타의 여가활동 장소의 계획과 설계에 유용할 것으로 판단된다. 장차 더 많은 측정변수들을 도입하여 도시공원의 공급에 관한 구조방정식 모형의 정립과 도시공원의 종류별 공급인자 에 대한 평가가 요구된다.

• 한국어류학회지
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• 제35권4호
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• pp.224-235
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• 2023

우리나라는 전 세계에서 유일한 분단국가로 군사분계선을 가지고 있다. 군사분계선을 기준으로 비무장지대 및 민간인통제구역이 설정되었고, 국가보안 및 안전을 위해 출입이 통제되고 있어, 우리나라 다른 지역에 비해 생태계 교란이 비교적 적은 지역이다. 하지만 유실지뢰 및 불발탄들로 인해 안전이 위협받음에 따라 생태계 연구에 많은 제한사항이 발생하기 때문에, 연구를 보완 및 대체하기 위해 eDNA 분석법을 활용하여 민간인통제구역 내부에 존재하는 평화의 길 세 지점에서 직접조사와 eDNA를 이용한 간접조사를 실시하고 비교했다. 평화의 길 인제노선, 양구노선, 화천노선 세 지점에서 2022년 5, 7, 9월에 직접조사와 eDNA 시료 채취를 진행했으며, 시료에서 채취한 유전자를 증폭한 후 library를 제작하여 Miseq를 수행하고 ASV를 생성하여 간접조사를 완료했다. 이후, 직접조사 결과와 비교했다. 그 결과 양구-1 지점에서 관찰된 2종 모두 eDNA가 검출되었으며, 양구-2 지점에서 관찰된 4종 중 2종의 eDNA가 검출되었다. 화천-1에서 관찰된 1종 중 1종의 eDNA가 검출되었고, 화천-2에서 12종 중 7종, 화천-3에서는 6종 중 4종, 화천-4에서 관찰된 1종 모두 eDNA가 검출되어 직접조사 결과 확인된 종의 약 69%의 어류의 eDNA가 검출된 간접조사 결과를 확인했다. 대륙종개, 메기 등 일부 어류가 오동정된 상태로 NCBI에 유전정보가 등재된 것은 아닌지 확인이 필요하고, 다른 서열부를 이용한 마커 개발 연구가 필요할 것으로 생각되며, 위험성 때문에 조사가 제한적인 CCZ 지역 어류 연구의 보완책으로써 적합할 것으로 생각된다.

• 시큐리티연구
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• 제50호
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• pp.175-206
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• 2017

이 연구는 인도네시아 이슬람 극단주의 역사와 최근의 인도네시아의 국제 이슬람 극단주의의 확산 실태를 조사한다. 이 연구의 수행을 위해서는 인도네시아 이슬람 극단주의 관련 문헌조사와 관련자들의 질적 인터뷰를 병행한다. 문헌조사를 위해서는 미디어 보도, 관련 연구 보고서와 논문 등을 수집하고 활용한다. 질적 인터뷰를 위해서는 국내체류 인도네시아 학생들과 체류자들, 인도네시아인과 결혼한 한국인 배우자들, 인도네시아 현지에서 활동하는 한국인 선교사들 등을 포함한다. 이들에 대한 질적 인터뷰는 30분에서 2시간에 걸쳐 진행되었다. 연구대상의 모집단을 사실상 특정화 할 수 없으며 연구주제의 성격상 인터뷰 대상에 접근이 용이하지 않았기 때문에 편의 샘플과 눈덩이 샘플 추출 방식을 활용하였다. 연구결과에 따르면, 인도네시아의 이슬람 극단주의는 뿌리가 깊고 일반적으로 아프가니스탄, 파키스탄, 이집트, 사우디아라비아 등과 같이 이슬람 극단주의가 공고히 뿌리를 내리고 있는 다른 무슬림 국가들과 유사한 역사적 경험을 공유한다. 즉, 서방 제국주의에 대한 반작용으로 이슬람 원리주의가 시작되었으며, 독립이후 근대국가 발전과정에서 소외되었고 소련-아프간 전쟁을 거치며 극단화 폭력화 하는 과정을 거쳤다. 또한 9.11테러 이후 국제적 이슬람 극단주의 네트워크와 연결되어 글로벌 지하드에 편입되는 발전경로를 보여준다. 이러한 역사적 발전 궤적은 인도네시아의 이슬람 극단주의가 상당히 조직적이고 공고하다는 것을 알려준다. 한편, 최근 들어 IS와 알카에다 등의 국제 이슬람 극단주의 세력의 동아시아 확장전략에 따라 인도네시아로의 침투와 확장이 관찰된다. 이는 특히 인도네시아의 소외되고 낙후한 시골지역에서 보다 뚜렷이 관찰된다. 이러한 인도네시아에서의 국제 이슬람 극단주의 세력의 확산은 지리적 근접성, 국내 상당규모의 이주자 공동체의 존재 등의 사실을 고려할 때 직접적으로 우리 국가에 위협을 미치게 될 것이다. 이러한 맥락에서 인도네시아 내에서의 이슬람 극단주의 확산 동향에 대한 주의와 관심은 시기적으로 매우 필요하다고 볼 수 있다.