• 한국융합학회논문지
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• 제10권3호
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• pp.221-225
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• 2019

이 연구의 목적은 일반 대중이 심폐소생술을 쉽게 적용하기 위한 기본적인 데이터를 제공하는데 있다. 심폐소생술 마네킹과 CPR 큐브를 사용하는 두 그룹으로 나누었으며 실험에 앞서 참가자들에게는 3일 동안 실습을 동반한 심폐소생술 훈련을 실시하였고 2주 후 가슴압박에 대한 평가를 실시하였다. 참가자들은 가슴압박깊이, 가슴압박의 횟수, 가슴압박의 정확성, 불충분한 이완, 불완전한 압박위치를 기록하였다. 연구결과에서 불충분한 이완, 불완전한 압박위치는 통계적으로 유의한 차이가 있었다. 심폐소생술 교육의 확대를 위해서 CPR 큐브를 사용한다면 심폐소생술 시행 자신감과 질적인 측면에서도 유용할 것으로 생각된다.

• 한국환경과학회지
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• 제28권9호
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• pp.729-735
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• 2019

The aim of this study was to determine the effects of different compositions of environmental substrates on hydroponic tomato cultivation. Three different substrates were used in coir chip:dust (v/v=50:50; CP1), coir chip:dust (v/v=80:20; CP2), and rock wool cube with CP2 (CPR). The amount of irrigation during the cultivation period was 190 mL/(plant time) in all substrates. The pH and EC were 5.8-6.2 and 2.6-2.9 dS/m, respectively. The drainage rate in CP1 was 31%, in CP2 was 36%, and in CPR was 29%. The growth of tomato plants in terms of height was higher in CP1 and CPR. The leaf area was greater in CP2. The fresh and dry weights were greater in CP2 and CPR treatments. The net photosynthesis in CP2 ($19.31{\mu}mol\;CO_2/m^2s$) and root activity in CP2 were higher among all three treatments. The soluble solid content of fruit was not significantly different among treatments. The yield per plant in CP2 and CPR treatments was 17% greater than the yield per plant in CP1. Therefore, the most suitable substrate for hydroponic tomato cultivation is the substrate mixed with coir chip:dust (v:v=80:20; CP2), i.e., CPR.

• Current Photovoltaic Research
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• 제10권2호
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• pp.33-38
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• 2022

Planner configuration thin film solar cells (TFSCs) with SnS/CdS heterojunction performed a lower short-circuit current (J_SC). In this study, we have demonstrated a path to overcome deficiency in J_SC by the incorporation of Se in the SnS absorber. We carried out the incorporation of Se in VTD grown SnS absorber by rapid thermal annealing (RTA). The diffusion of Se is mostly governed by RTA temperature (T_RTA), also it is observed that film structure changes from cube-like to plate-like structure with T_RTA. The maximum J_SC of 23.1 mA cm^-2 was observed for 400℃ with an open-circuit voltage (V_OC) of 0.140 V for the same temperature. The highest performance of 2.21% with J_SC of 18.6 mA cm^-2, V_OC of 0.290 V, and fill factor (FF) of 40.9% is observed for a T_RTA of 300℃. In the end, we compare the device performance of Se- incorporated SnS absorber with pristine SnS absorber material, increment in J_SC is approximately 80% while a loss in V_OC of about 20% has been observed.