In recent years, advances in the digital and live streaming economy have led to exponential growth in the number of self-employed streamers who have become an integral part of the self-driven digital labor force. However, previous research on the impact of streamers' work time arrangements on their virtual gifts remains scarce. To fill this gap in the literature, using large-scale data from Kuaishou live streaming platform, we demonstrate that several features of streamers' work time have an important impact on their virtual gifts. Specifically, our results suggest that work time duration and timing improve streamers' virtual gifts; meanwhile, work time tempo has an adverse effect on streamers' earnings. Taken together, our results provide novel and actionable insights for millions of self-employed streamers, agencies, platforms, and policymakers.

Driving to the store, finding parking, defective carts, difficulties in finding items, poor product info, long lines for checkout, unclear receipts, carrying heavy shopping bags home, and forgotten items are some of the most common barriers experienced by grocery shoppers. These are also the most common reasons why shoppers decide to switch to alternative retailers or to online grocery channels. COVID-19 accelerated this trend with online grocery shopping and home delivery services became prevalent and grew significantly during the pandemic (Gupta & Mukhejee, 2022). Today, e-grocery has reached 11% of the total grocery sales and being expected to reach 19% by 2025 in US (source: Statista, 2022). Brick and mortar grocery retailers declare to suffer from low loyalty of their customer and margin pressure. On the other side, the recent investments of online pure players such as Amazon and Alibaba in physical retail, including grocery, show that the physical shopping has still potential to lead retailers’ growth, also within grocery. Grocery retailers should therefore find new ways to attract and retain customers to their stores. Offering a better customer experience (CE) may be a valuable strategy to this end. A great CE has emerged at the base of a sustainable competitive advantage for companies, and it is at the heart of customer loyalty (Grewal et al., 2017) in several sectors but has often been neglected within grocery selling.

The present study examines the impact of COVID-19 anxiety on employees’ psychological resources and behaviors, drawing on the conservation of resources theory. We also investigate whether flexibility in work contexts has a meaningful effect on employees’ responses to the pandemic. A total of 284 working adults participated in an online survey consisting of self-reporting questionnaires that assessed levels of COVID-19 anxiety, vigor, innovative work behavior, and flexible working arrangements. The results showed that the level of vigor mediated the positive relationship between COVID-19 anxiety and innovative work behavior, and the perceived level of flexible working arrangements moderated this mediation effect positively. The findings highlight the importance of considering employees’ psychological resources and work arrangements in managing the negative impact of COVID-19-related anxiety. This study provides theoretical and practical implications for organizations to better understand the psychological processes that employees undergo during a crisis. Further research on diverse work settings and cultural backgrounds is needed to expand on the present findings.

This study would analyze a survey conducted with 609 workers to use the results as materials for the settlement of safety culture for the characteristics of the establishment by assessing the status of the workers’ exposure to harmful risks and the impact on safety culture to present the following conclusions. This study has significance in that it found that exposure to harmful/dangerous factors in the establishment and the workers’ experiences of occupational accidents affect their perception of safety culture and that in particular, ‘worker safety priority’ of the safety cultural factors was an important factor, and it is judged that continuous studies are necessary so that the perceptions of safety culture will spread in the establishment.

본 연구는 조직이 원격근무를 도입하고자 할 때 실질적으로 고려해야 할 사항들을 분석해 제안하려는 목적으로 실행되었다. COVID-19로 인해 확산된 원격근무는 생산성의 보전 및 일-가정 양립 등의 효용을 가져와 포스트 팬데믹 시대에서도 뉴노멀로 활용될 수 있다는 가능성이 타진되었다. 그러나 원격근무는 전염병으로 인한 위기 상황에서 주입적으로 실행되었을 뿐 그에 맞는 운영 방침이 정해지지 않아 기업들 의 효율적인 도입이 어려웠다. 기존부터 원격근무에 관련된 연구는 진행되고 있었다. 그러나 선행연구들 은 원격근무의 이론적인 방향성을 언급하거나 긍정적인 효과에 대한 기대점을 시사하는 내용이 주를 이루었고 원격근무를 도입하거나 개선하고자 하는 기업을 위해 정량적 기법을 활용하거나 구체적인 제도 수립을 위한 요인 제시에 있어서는 미흡한 상황이다. 이에 본 연구는 원격근무 도입 시 고려해야 할 핵심 요인을 도출하여 기업들의 원격근무 도입에 실용적이고 통합적인 관점을 제안하고자 하였다. 이를 위해 경영학계 교수 및 인사관리 전문가들로 구성된 패널을 대상으로 델파이 조사를 실시하였다. 델파이 연구 는 정립되지 않은 분야에서 방향성을 도출하기에 적합한 사회 연구 방법론이라고 할 수 있다. 따라서 델 파이에 관련된 선행연구를 따라 가장 적합한 방식으로 총 3차에 걸친 델파이 조사를 진행하였으며, 조사 결과 최종적으로 조직문화, 업무환경, 인적자원, 성과관리의 네 가지 영역에 걸친 16가지의 핵심 요인이 도출되었다. 본 연구는 원격근무와 관련된 명확한 가이드라인이 없는 상황에서 원격근무 도입 시 인사 관리자들이 실질적으로 고려할 수 있는 요인들을 체계화했다는 점에서 의의를 지닌다.

Ensuring the safe arrival of delivery cargo at its intended destination is of utmost importance. Truck drivers play a crucial role in guaranteeing the secure delivery of cargo without any mishaps. However, there are various factors that may lead to delayed arrival of trucks at their destination, such as late departures or prolonged loading operations. The timely departure of cargo transportation is contingent upon several variables, including the driver's experience, cargo volume, and loading time. If the transportation commencement is delayed, it may increase the risk of accidents due to an elevated operating speed. Consequently, we conducted a study to investigate the correlation between cargo loading time, cargo volume, driving experience, and the likelihood of accidents. Our findings indicate that both cargo volume and driver experience can impact the likelihood of vehicle accidents. Furthermore, all factors can have an interactive effect on the occurrence of accidents. However, extending the loading time may mitigate the impact on the likelihood of accidents.

Previous works on safety behavior have paid less attention to the influence of several leadership styles on safety behavior. Among the various leadership styles, I focus on the effect of coaching leadership on safety behavior. To be specific, this paper investigates the impact of coaching leadership on safety behavior and its underlying mechanisms (mediator) as well as contextual factor (moderator). This research examines the sequential mediating effect of perceived organizational support and organizational identification in the association between coaching leadership and safety behavior. Also, work overload will negatively moderate the coaching leadership-perceived organizational support link. My results showed coaching leadership increases employee safety behavior through the sequential mediation of perceived organizational support and organizational identification. In addition, work overload functions as a negative moderator which diminishes the positive effect of coaching leadership on perceived organizational support.

Radioactive waste generated during nuclear power plant decommissioning is classified as radioactive waste before the concentration is identified, but more than 90% of the amount generated is at a level that can be by clearance. However, due to a problem in the analysis procedure, the analysis is not carried out at the place of on-site but is transported to an external institution to identify concentration, which implies a problem of human error because 100% manual. As a way to solve this problem, research is underway to develop a mobile radioactive waste nuclide analysis facility. The mobile radionuclide analysis facility consists of a preparation room, a sample storage room, a measurement room, a pretreatment room, and a waste storage room, and is connected to an external ventilation facility. In addition, since the automation module is built-in from the sample pre-threatening step to the separation step, safety can be improved and rapid analysis can be performed by being located in the decommissioning site. As an initial study for the introduction of a mobile nuclide analysis facility, Visiplan, a preliminary external exposure evaluation code, was used to derive the analysis workload by a single process and evaluate the exposure dose of workers. Based on this, as a follow-up study, the amount of analysis work according to the continuous process and the exposure dose of workers were evaluated. As a result of the evaluation, the Regulatory dose limit was satisfied, and in future studies, internal and external exposure doses were evaluated in consideration of the route of movement, and it is intended to be used as basic data in the field introduction process.

본 연구는 1974년부터 2003년까지 김홍도의 주일 낮 예배 설교 중 기도를 주제로 삼는 40여 편을 선별하여, 설교 구성과 내용 그리고 삼중구조의 의의를 밝혀 구령 활동과의 연관성을 통하여 선교적 의미를 발견하게 된다. 설교 구성은 신구약 성경 구절을 균형 있게 자주 인용하 였으며, 성경과 교회의 역사에 있었던 기도 인물들 이야기와 기도에 관한 격언들을 적절히 활용함을 보여준다. 설교 주제는 기도의 동기와 원리를 먼저 선포하고, 기도 방법과 결과를 다루고 있다. 이처럼 기도의 동기, 방법, 결과에 대하여 삼중구조로 기도의 실천을 종합한다. 첫째, 개인의 영역에 제한되지 않고, 그 대상이 전방위적으로 통전적 모습을 보여주고 있다. 둘째, 교회 역사 속 기도의 인물들과 격언을 인용하여 교인들에게 기도의 실천적인 부분을 강조하게 된다. 셋째, 쉽고 반복되 는 설교 내용은 교인들에게 삶 속에서도 나눌 수 있도록 선교적 기도 영성을 적극적으로 활용하였다. 이러한 삼중구조와 각 내용의 균형은 영혼 구원이라는 목적을 이루기 위하여 통전적, 실천적, 선교적이다.

This paper is the result of a comparative analysis of crew members' workloads using the EMG and OWAS methods according to the fishing process before and after the improvement of the operating system of the experimental vessel, with the aim of improving operational efficiency and safety work of coastal improved stow net fishing vessels. The target crew members were three people with at least five years of experience on board the same fishing vessel as the experimental vessel. After improving the operating system, such as installing a power block crane and two capstans, change the location of the ball-roller, the time required for setting and hauling work decreased (p < .01), and the evaluation results by OWAS showed that the overall workload for setting and hauling net work decreased. The results of muscle activity analysis showed a decrease in lashing anchor work (p < .01) in the case of hauling net and in anchor dropping work in the case of setting net (p < .001). It is judged that the use of ball rollers in net handling has been reduced; consequently, work safety has been improved.

이 연구는 경제학에 ‘우울한 학문’이라는 별명이 붙게 된 계기라고 하 는 칼라일과 J.S.밀 사이의 논쟁에서 다루어진 ‘근로의무’에 주목해서, 그 역(逆)인 ‘일하지 않을 자유’에 관한 현대 자유주의자들의 생각을 살펴보 고, 우리 헌법의 근로의무 조항의 의미와 국민기초생활보장법이 정하는 근로조건부 생계급여의 타당성을 검토하였다. 칼라일과 J.S.밀은 누구나 일할 의무가 있다고 생각하였지만, 그 의무를 강제할 수 있는지를 두고 의견이 갈렸다. 칼라일은 강제로라도 노동을 해 야 한다고 주장하였지만, 밀은 그런 예속(隸屬)에는 반대하였다. 현대의 자유주의자 중에서 간섭이 없는 소극적 자유를 지지하는 우파 자유주의자 하이에크는 ‘가난한 사람이 일하지 않을 자유’를 허용하는 데 반하여, 평 등한 자유의 실질을 보장하는 것을 강조한 좌파 자유주의자 롤스는 그런 자유를 부정하였다. 이런 차이는 소극적 자유주의와 적극적 자유주의의 차이에서 비롯한다고 보인다. “모든 국민은 근로의 의무를 진다”고 하는 헌법 제32조 제 2항에 따라 서 국가가 법률로 근로를 강제할 수 있는지에 관하여는 다양한 견해가 제 시되고 있다. 이 연구는 법률로라도 직접 근로를 강제할 수는 없으며, 다 른 권리에 대한 제약을 통한 간접적인 강제가 가능하지만 사회보장수급권 에 대하여는 간접강제도 불가능하다는 견해를 자유의 가치와 인간존엄의 의의를 고찰해서 보강하였다. 호펠드의 권리분석과 벌린의 두 가지 자유개념에 따르면, 근로조건부 생계급여는 자유권을 제한하고, 소극적 자유를 침해하며, 일정한 적극적 자유 구현을 강요한다. 하지만 적극적 자유개념은 개인의 자유를 억압하 고 침해할 위험이 있고, 도덕에서는 강제가 아니라 자율이 우선이다. 또, 모든 국민에게 ‘인간으로서의 존엄과 가치’가 있다고 천명한 헌법 제10조 가 현실적이고 넓게 규범력을 발휘하려면 자유의 가치를 소극적인 데서 찾고 인간존엄의 의의를 소박하게 이해할 필요가 있다. 즉, 자유의 가치 는 ‘하고 싶은 대로 하고, 하기 싫은 일은 하지 않는 것’이 그 자체로 선 (善)이라는 점을 기초로 찾고, 인간존엄의 의의는 ‘자율적이지 않거나 불 합리한’ 삶도 존중해야 한다는 요청으로 이해하여야 한다. 그러므로 근로를 생계급여의 조건으로 부과하는 것은 헌법의 여러 자유권 과 인간존엄을 침해하는 부당한 제도이다.

교량 인프라는 국민의 경제와 사회적 활동에 반드시 필요한 물리적 기반시설이고, 국민의 안전과 편의성에 직결되는 시설이므로 국민의 입장에서 편익을 고려해야 한다. 교량의 구성요소 중 바닥판은 교량 전체의 생애주기 동안 필연적으로 교체 시기가 도래하고 파손 등으로 인한 부분 교체도 빈번하게 이루어지고 있다. 바닥판 교체공사 시 거더와 바닥판을 합성하는 기 존 용접 전단연결재의 문제점을 해결하기 위한 볼트 접합 전단연결재(DY볼트)는 바닥판 철거 공정에서 파쇄를 최소화하고 교 체공사를 위한 전단연결재 재시공이 용이하여 공사 기간을 기존 대비 단축할 수 있는 것으로 분석되었다. 공사기간 중 도로차 단으로 인해 발생하는 도로이용자비용을 산출하여 기존 공법과 비교하는 방법으로 볼트 접합 전단연결재를 적용한 강합성 교량 의 경제성을 도로이용자(국민) 입장에서 분석하였다.

The existing production and manufacturing process was manually operated and the cleaning process was not constant due to poor environmental conditions for several hours, so the production efficiency was significantly lowered and manufacturing cost was increased. In this R&D, productivity improved by doubling the production of 300 units per hour to 700 units, and in this development, manufacturing costs were lowered through this process improvement project based on automotive shoba automation technology.

n Korea, the decommissioning of nuclear power plants is being prepared, and a large amount of radioactive waste is expected to be generated. In particular, clearance level waste, which accounts for more than 90%, requires prevention of cross-contamination and prompt classification. In this study, the possible exposure route and the derivation of exposure dose for worker exposure management in a movable analysis system that can be analyzed onsite were studied. The movable radionuclide analysis system is divided into a preparatory room, a sample storage room, a radioanalysis room, a laboratory, and a waste storage room. It consists of one radioanalysis worker and one pre-treatment worker, and the main radiation exposure is expected to occur in the movement path in the sample storage room, radioanalysis room, and laboratory. The source term for the exposure evaluation, the annual usage dose presented in the radiation safety report in the movable radionuclide analysis system was used. The input data for the evaluation of the external exposure dose under normal circumstances (exposure situation, working hours, distance, etc.) is referenced at facility specifications. The internal exposure dose evaluation was assumed to be acute exposure (1 hour) assumed as internal pollution due to the drop in liquid sample during the pretreatment work. As an evaluation method, a method using a calculation formula and a method using an evaluation code was performed. For the evaluation of exposure dose using the calculation formula, a preliminary evaluation was performed using the point source method, the point kernel method, and intake and dose conversion factors. In addition, VISIPLAN and IMBA codes were used to evaluate exposure dose using the evaluation code, and the input data were supplemented for evaluation. As a result of the evaluation, the annual exposure dose limit of 20 mSv was satisfied for both normal and non-normal situations. In future research, it is planned to derive the evaluation results by particular scenarios for the detailed movement route and evaluation time according to the work process in the mobile radionuclide analysis.

In 2017, Kori unit 1 nuclear power plant was permanently shut down at the end of its life. Currently, Historical Site Assessment (HSA) for MARSSIM characteristics evaluation is being conducted according to the NUREG-1575 procedure, this is conducted through comprehensive details such as radiological characteristics preliminary investigation and on-site interview. Thus, the decommissioning of nuclear power plant must consider safety and economic feasibility of structures and sites. For this purpose, the establishment of optimal work plan is required which simulations in various fields. This study aims to establish procedure that can form a basis for a rational decommissioning plan using the virtual nuclear power plant model. The mapping procedure for 3D platform implementation consisted of three steps. First, scan the inside and outside of the nuclear power plant for decommissioning structure analysis, 3D modeling is performed based on the data. After that, a platform is designed to directly measure the radiation dose rate and mapped the derived to the program. Finally, mapping the radiation dose rate for each point in 3D using the radiation dose rate calculation factor according to the time change the measured value created on the 3D mapping platform. When the mapping is completed, it is possible to manage the exposure dose of workers according to the ALARA principle through the charge of radiation dose rate over time because of visualization of the color difference to the radiation dose rate at each point. For addition, the exposure dose evaluation considering the movement route and economic feasibility can be considered using developed program. As the interest in safety accidents for workers increases, the importance of minimum radiation dose and optimal work plan for workers is becoming increasingly important. Through this mapping procedure, it will be possible to contribute to the establishment of reasonable process for dismantling nuclear power plant in the future.

High Integrity Container (HIC) made of polymer concrete was developed for the efficient treatment and safe disposal of radioactive spent resin and concentrate waste in consideration of the disposal requirements of domestic disposal sites. Permission for application of Polymer Concrete High Integrity Container (PC-HIC) to the domestic nuclear power plants (NPPs) has been completed or is under examination by the regulatory agency. In the case of 860 L PC-HIC for very-low-level-waste (VLLW) or low low-level-waste (LLW), the application of four representative NPPs has been approved, and the license for extended application to the rest NPPs is also almost completed. A licensing review is also underway to apply 510 L PC-HIC for intermediate and low-level-waste (ILLW) to representative nuclear power plants. In order to handle and efficiently store and manage PC-HICs and high-dose PCHIC packages, a gripper device that can be remotely operated and has excellent safety is essential, and the introduction of NPPs is urgent. The conventional gripper device developed by the PC-HIC manufacturer for lifting test to evaluate the structural integrity of PC-HIC requires a rather wide storage interval due to its design features, and does not have a passive safety design to handle heavy materials safely. In addition, work convenience needs to be reinforced for safety management of high radiation work. Therefore, we developed a conceptual design for a gripper device with a new concept to minimize the work space by reflecting on-site opinions on the handling and storage management conditions of radioactive waste in NPPs, and to enhances work safety with the passive safety design by the weight of the package and the function of checking the normal seating of the device and the normal operation of the grip by the detector/indicator, and to greatly improves the work efficiency and convenience with the wireless power supply function by rechargeable battery and the remote control function by camera and wireless monitoring & control system. Through design review by experts in mechanical system, power supply and instrumentation & control fields and further investigations on the usage conditions of PC-HICs, it is planned to facilitate preparations for the application of PC-HIC to domestic NPPs by securing the technical basis for a gripper device that can be used safely and efficiently and seeking ways to introduce it in a timely manner.

The purpose of this study is to provide lessons learned in the experience of improvement work of fuel handling equipment at operating nuclear power plants. The upgrade of fuel handling equipment for safety enhancement and performance improvement has been going on for 15 years since the early 2000’s. The main goal is to increase fuel loading/unloading capability of the equipment from about 2.5 fuel assemblies per hour to more than six (6). It is achieved with sequential operations of three (3) fuel handling equipment, which consists of the refueling machine, the fuel transfer system and the spent fuel handling machine. The scope of the upgrade for fuel handling equipment is summarized as follows. The PC data control system based on PLC for interlocks and high speed motor drive system is introduced for better operating efficiency. The motors and drives for bridge, trolley, and hoist are replaced with AC servomotors and drivers, respectively. The fuel transfer system has an auto-initiation feature operating from the refueling machine or the spent fuel handling machine. The winch motor and drive for the carriage of fuel transfer system is also replaced with AC servomotors and drivers. And some of HPU (hydraulic power units) equipment for each building (reactor containment building and fuel handling building) are replaced to improve their function. The considerations for improvement of fuel handling equipment are as belows. 1) Fuel handling should be consistent with the instructions provided by the fuel designer and/or manufacturer, which are for Standard type fuel and Westinghouse type fuel, used in domestic nuclear power plants. Each fuel has unique design characteristics, which are PLC setpoints for overload and underload, slow speed zones for a bridge, trolley and hoist, allowable acceleration/deceleration value in handling, hoist elevation and manual speed in off-index operation at reactor. 2) The interlock system should be designed in accordance with design criteria specified by the utilities of nuclear power plant. 3) Performance should be improved according to the operating characteristics of the fuel handling equipment. High-speed and optimization of FTS upender and carriage are essential for operating performance so that its modification should be considered first. And the low speed and range in the operation mechanism of the hoist should be designed to comply with guidelines. 4) The accident analysis through self-diagnosis function and operation history in modification at domestic operating nuclear power plants would be good lessons learned. It is advisable to utilize such various information as it can help to improve reliability of nuclear fuel handling operation and power plant operation rate.

Rack is a place to store products. Workers pick products from rack storage. After picking up, workers move to another location by forklift. Driving speed, worker condition, and number/frequency of operation is responsible for forklift accidents. When an accident occurs, products get damaged. Therefore, it is important to prevent one. As the research result, To prevent forklift accidents, the minimum order quantity, the minimum number of operations, and low speed operation are required.