초등교사들의 자연과 교수지도에 대한 과학 불안도 및 태도 인식조사

이재천,권태형,김범기 한국교원대학교 과학교육연구소 1997 청람과학교육연구논총 Vol.7 No.1

The purpose of this study was to investigate of perceptions about science teaching anxiety and attitudes toward science of elementary school teacher. For this study, 810 elementary school teacheres were selected from chungbuk prefecture. Three instruments were administered this study; S-STAI (science teaching state-traite anxiety inventory), ISA(Inventory of Science Attitudes), SSAF(Survey of Science Anxiety Factor). The results were as the following; 1. Perception of science teaching anxiety showed about 37.9% of elementary school teachers. 2. Attitudes toward science teaching were not significantly difference according to teacher variable. 3. The relation between the science anxiety and attitudes toward science showed negative correlation(r=-0.47). 4. Factor of science anxiety showed from inquiring experimental assessment and instruction method related teaching science inquiry skills.

Cr(Ⅲ)-EDTA착이온 [Credta(H_2O)]￣과 아세트산이온과의 치환반응의 평형상수에 미치는 압력의 효과

정종재,황정의,서형택 慶北大學校 1982 論文集 Vol.33 No.-

The equilibrium constants of substitution reaction of ethylenediaminetetraacetatoaquochromate(Ⅲ) ion with acetate ion were determined under high pressure by the spectroscopic method in order to learn how pressure governs the magnitude of the equilibrium constant of the reaction. 〔Cr(edta)(H_2O)〕^-+OAc^-??〔Cr(edta)(OAc)〕^2-+H_2O The reaction was analyzed with the thermodynamic parameters calculated from the equilibrium constants. The equilibrium constants increased as the pressure and the temperature did. The enthalpy change (ΔH°), entropy change (ΔS°) and volume change (ΔV°) of the reaction were obtained by the equilibrium constants change with the pressure and the temperature. The isoequilibrium temperatures were obtained from the isokinetic relationship between ΔH° and ΔS° for the pressure change in the reaction. From all of the above results, it was found that this reaction was endothermic and enthalpy controlled reaction in the experimental temperature.

交流一直流 竝列送電系統의 定態安定度 解析에 관한 硏究

鄭亨煥,李浚析,金海在 동아대학교 공과대학 부설 한국자원개발연구소 1991 硏究報告 Vol.15 No.1

This paper mainly deals with the problems related to the improvememts of power system stability for an infinite bus-bar system with single machine, which AC and DC transmission line are connected in parallel. We considered about the stable operation region for the steady-state stability of power system with a DC current controller and without one. Specially, we assumed the general coefficients of converters in DC transmission line to be constant and obtained easily the stable limit curve in variations of gain coefficients for DC current controller through the digital computer simulation.

3相 不平衡 電力系統의 潮流計算에 관한 硏究

주수원,김해재,정형환 동아대학교 공과대학 부설 한국자원개발연구소 1989 硏究報告 Vol.13 No.2

This paper describes the modification required to produce an efficient three-phase Load-flow using as a reference the single-phase fast-decoupled algorithm. The algorithm provides, fast and reliable convergence even with extreme conditions of steady-state unbalance.

운동제어의 신경생리학적 기초

정성태,홍승길,임재형 師範大學 體育硏究所 1994 서울大學校 體育硏究所論集 Vol.15 No.2

Many motor activities of animals and human beings are a critical aspect for their survival. Although it has not been clearly understood how motor activities are produced, the idea that various motor programs exist somewhere in the central nervous system (CNS) is generally accepted. As evidence for existence of motor programs in the CNS, we may consider a simple, repetitive movement like walking. Walking does not require continuous thinking. Once it is initiated, it becomes quite automatic. If we try to control consciously our automated movement, then it becomes so unnatural. Edward Evart, a neurophysiologist, noticed in his monkey experiments that the arm muscle contraction for handle movement was preceded by the activation of neurons in the motor cortex that governs the arm movement. These experimental results may be taken as evidence for existence of central programs for movements in the motor cortex. Many other studies, however, have indicated that cerebellum is an important structure where motor program are stored. Potentially, motor programs may not be restricted to a particular site in the CNS. Instead, they may be distributed in the cortex. cerebellum and other neural structures such as the basal ganglia. To understand movements at the neural level, we should determine how movements are coded in the CNS. More specifically, we may have to reveal how neurons are interconnected and how they communicate with each other to ultimately produce movements. An important thing to realize before we attempt to answer these questions is the fact that there is no clear-cut boundary between voluntary and involuntary movements. Even in the voluntary activities such as tennis game, there are lots of involuntary components. Also, in many other cases, there is good evidence that perfect movements can be achieved involuntarily. Diving, which requires a rapid, coordinated control of eyes, arms, legs and other parts of the body, is a good example. To perform this type of movement, there must be a motor program. Cerebellum has been indicated as a key structure necessary for this kind of program. Cerebellum is known as a site involved in the control of independent limb movements, especially rapid, skilled movements. Such movements are initiated by neurons in the frontal association cortex, which control neurons in the primary motor cortex. Both the frontal association cortex and the primary motor cortex send information about intended movements to the cerebellum. Information from the somatosensory system, which informs about the current position and rate of the movement of the limbs-information necessary for computing the details of a movement-is also sent to the cerebellum. When the cerebellum receives the information that the motor cortex has begun to initiate a movement, it computes the contribution that various muscles will have to make to perform that movement. The result of this computation is sent back to the motor cortex. Thus, the information from the cortex enables the cerebellum to modify the ongoing movement initiated by the frontal cortex. The capacity of the cerebellum to fine-tune motor drive generated in the motor cortex may be enhanced by training. In this case, the training will influence the involuntary components of movement.

Diagnosis of Cardiovascular disease using Respiratory Gas Exchange in Submaximal exercise

Jae-Hyeng Im,Yoo-Joung Jeon,Hong-Gil Choi,Jung-Du Kwon,Chang-Hwan Kim,Byeong-Wan Kim 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11

The purpose of this study is to estimate clinical diagnosis using incremental treadmill exercise test, HR of the normal subjects linearly increases to the predicted maximal values as VO₂ increases. In contrast, CAD, PVD, sarcoidosis, and IPF patients showed non-linear data. For those in the normal subjects, their VCO₂ linearly increases in respect to VO₂. Also, the HR of the normal subjects linearly depended on intensity of exercise until they reach the predicted maximal heart rate, but PAD and COPD patients has lower increase rate of HR. O₂ pulse(VO₂/HR) of the normal subjects gradually increases to the predicted normal value while CAD patients with myocardial ischemia symptoms don’t show any changes. When PaCO₂ is normal, VE/VO₂ keeps falling and nadir reach less than 28 in AT. VE/CO₂ reach a nadir in ventilator compensation point and it is less than 32. CAD, PAD, and obesity patients’ VE/VO₂ and the nadir values of VE/CO₂ tend to be normal. But, IPF patients(symptoms with chronic heart failure, PVD, COPD, sarcoidosis, and VD/VT increase) have high nadir values.

탄수화물과 운동

임재형(Jae-Hyeng Im) 한국체육과학회 1995 한국체육과학회지 Vol.4 No.1

근방추와 신전반사

임재형(Jae-Hyeng Im),지용석(Yong-Seok Jee) 한국코칭능력개발원 2005 코칭능력개발지 Vol.7 No.1

뇨폐환자(尿閉患者) 1예에 대한 임상적 고찰

김재형 ( Jae Hyeng Kim ),조충식 ( Chung Sik Cho ),김철중 ( Chul Jung Kim ) 대전대학교 한의학연구소 2005 혜화의학회지 Vol.14 No.1

성인병과 운동

임재형(Im Jae-Hyeng),지용석(Jee Yong-Seok) 한국코칭능력개발원 2006 코칭능력개발지 Vol.8 No.4