Average 기법에 의한 Visual-TEP의 검출과 DC-Drift 제거에 의한 TEP 신호개선에 관한 연구

배병훈,최정미 대한의용생체공학회 1994 의공학회지 Vol.15 No.2

This paper presents average method to detect Visual-Transient Evoked Potential from the human scalp electric potential measured by the ElectroEncephaloGram. To confirm the validity of average method, the average-process is performed with both stimulated and no-stimulated potentials respectively, and both results are compared. The specific waveform, which is visual-transient evoked potential, is produced only in the case of stimulated potential. It was found that a dc-drift, due to instrumentation errors and other noises, can produce significant changes in the evoked-potential waveform. This can be removed with a high-pass filter (cut-off frequency=0.5Hz).

한강의 '채식주의자'에 나타난 ‘근원적 상실’과 우울․자살충동의 상관관계 연구: 로버트 제이 리프톤의 ‘형성화’ 개념을 중심으로

배병훈 한국문학과종교학회 2017 문학과종교 Vol.22 No.3

This paper asserts that the deepest background of all depression lies in the emptiness and meaninglessness caused by ‘ultimate loss,’ and that the key to overcoming it is to restore the sense of ‘transcendence’ and ‘connection.’ The characters appearing in The Vegetarian by Kang Han are all lonely human beings. They live in their own way, but they are not truly alive. In their lives, they do not properly create what Robert J. Lifton calls a ‘formulation.’ They are not connected with each other and have no symbolic integration with ‘Ultimate Reality.’ They are living in a moribund life trapped by their own trauma or emptiness. At the same time, they all show signs of depression and suicidal impulse. Therefore, by observing the novel, this paper examines human lives in modern times where depressions are prevalent, and suggests ways to solve such problems.

녹내장 치료용 능동형 압력조절밸브(Implant) 모델링 및 설계

배병훈,김낙훈,이연,기홍석,김선호,박기환,Bae, Byunghoon,Kim, Nakhoon,Lee, Yeon,Kee, Hongseok,Kim, Seoho,Park Kyihwan 대한기계학회 2001 大韓機械學會論文集A Vol.25 No.5

Glaucoma is an eye disease which is caused by abnormal high IOP (Intra Ocular Pressure). High IOP is caused by the aqueous humor which is produced consistently but not drained due to malfunction of the trabecular system which has a role of draining the aqueous humor into the venous system. Currently, there are three methods to treat glaucoma-using medicines, surgical operation, and using implant device. The first and second methods are not long acting, so the use of implants is increasing in these days in order to drain out the aqueous humor compulsory. However, though conventional implants have a capability of pressure regulation, they cannot maintain IOPs desired for different patients, and too much aqueous humor are usually drained, to cause hypotony. To solve these problems, it is needed to develop a new implant which is capable of controling the IOP actively and copes with personal difference of patients. An active glaucoma implant consists of the valve actuator, pressure sensor, controller, and power supply. In this paper, firstly, we make an analysis of the operation of a conventional implant using a bond graph and show defects and limitations of the conventional valve analytically. Secondly, we design and analyze a valve actuator considering actuation principles, resistance elements, control methods, and energy sources focused on power saving problem. Finally, using simulations the possibility of the proposed valve actuator is investigated.

Rasch 모형을 이용한 한국판 사회적 바람직성 척도 단축형(SDS-9)의 타당화

배병훈,이동귀,함경애 한국상담학회 2015 상담학연구 Vol.16 No.6

The Social Desirability Scale-17 (SDS-17; unidimensional 16 items), developed by Stöber (2001), has distinct strengths including: (a) its convenience in survey administration thanks to its relatively small number of items, (b) appropriateness in its contents that presumably reflect the societal reality, and (c) its sound psychometric properties (i.e., reliability and validity estimates) with adult samples over the age of 18. This study aims to validate the SDS-17 with the sample of 302 Korean college students through systematic and robust processes to assess the appropriateness and difficulty level of each item using the Rasch model. As a result, nine final items with two factors were selected, and then convergent and discriminant validate estimates were calculated to assess the validity of the revised version (SDS-9). This study ends with discussion of the utility of the scale in Korean context as well as its limitations. Stöber(2001)의 사회적 바람직성 척도(Social Desirability Scale-17; SDS-17)는 단일요인의 총 16문항으로 구성되어 있는데 문항수가 상대적으로 적어 설문지 연구에 포함하기에 용이하며, 사회상을 잘 반영하여 문항의 내용과 표현이 적절하고, 18세 이상 성인 대상으로 신뢰도와 타당도가 높은 유용한 척도로 평가되고 있다. 본 연구에서는 SDS-17에 대한 체계적 문항분석 과정을 거쳐 한국판 사회적 바람직성 척도를 타당화 하고자 대학생 302명으로부터 수집된 자료에 대해 Rasch 평정모형을 적용하였다. 그 결과, 문항의 적합도와 곤란도 분석을 바탕으로 9개의 최종 문항을 선정한 후, 추가적으로 수렴 및 변별 타당도 검증을 실시하여 수정된 SDS-9 척도(2요인 9문항)의 타당도를 평가하였다. 끝으로 한국판 사회적 바람직성 척도의 활용방안과 본 연구의 제한점을 논의하였다.

유발전위를 이용한 뇌의 시감각 및 체성감각 인지영역 추정기술

배병훈,김동우 대한의용생체공학회 1994 의공학회지 Vol.15 No.4

In this paper a study of neuro-pathway estimation based on visual and somatosensory evoked potential is given. The evoked potentials which are caused by visual and somatosensory stimulation are detected by an average method. The forward problem that is estimating a scalp potential from a given electrical source in the brain is solved by using a triple concentric spherical shell model of the head and a single current dipole model of the neuron activity. The inverse problem which calculates a source position is solved by a least square fit between the model predicted potential and a given evoked potential measurement. The similarities between estimated sensory neuro-pathways and physiological brain function regions are verified.

반건식-백필터에 의한 소각배가스 중의 HCI, SOx 제거 (Ⅰ)

배병훈,신남철,고경숙,김춘희,문종익,임경택 동아대학교 환경문제연구소 1997 硏究報告 Vol.20 No.1

This study has been carried out to investigate the removal efficiencies of HCl/SOx in a Spray-Dryer/Fabric-Filter system. In HCl/SOx removal, we could identify the key factors such as spray dryer outlet temperature, molar equivalence ratio(MER) and fabric filter velocity, but we couldn't find out the correlation of HCl and SOx. The removals of HCl/SOx were inversely proportional to spray dryer outlet temperature(l30~170℃) and filter velocity(l.0~1.5 m/min), at the MER, HCl removal efficiency was strongly proportional to MER, but SOx, removal efficiency was not particularly increased by MER over 1.5. The removal efficiencies of HCl/SOx were improved over 10% at the fabric filter. In this Spray-Dryer/Fabric-Filter system, HCl/SOx removal efficiencies were about 99%, 96% respectively.

신경전류 추적법을 이용한 뇌의 시각 신경로 추정 ( Estimation of the Visual Neuro-Pathway by the Source Tracing Method )

배병훈,김동우,최정미,김수용 대한전자공학회 1994 대한전자공학회 학술대회 Vol.1994 No.5

E . V . A . , 고무폐기물 소각에 따른 폐가스 처리의 연구

배병훈,장성호,임경택 한국환경과학회 1996 한국환경과학회지 Vol.5 No.2

The objectives of this study are to examine combustion characteristics of E.V.A. and rubber wastes by fixed-bed incinerator. The results are as follows. Combustion temperature with time rises rapidly, and mass of E.V.A. reduces at short time in E.V.A. combustion. In variation of air-fuel ratio (m), the ideal values of m of E.V.A. and rubber are 2.5, 1.5 respectively. Mixed-waste combustion is more economic than single E.V.A. combustion, because we can get high combustion efficiency (94.0∼99.0%) at 2.0 air-fuel ratio of mixed-waste combustion. Removal efficiencies of SO_2 at cooling tower are about 20%. The combustion efficiencies of rubber are over 98.0% according to the experimental conditions.

반건식-백필터에 의한 소각배가스 중의 HCI, SOx 제거 (Ⅱ)

배병훈,신남철,조정구,문종익,임경택 동아대학교 환경문제연구소 1998 硏究報告 Vol.21 No.2

A combination of process modification and various additives to a lime-based spray-dryer/fabric-filter system was evaluated for its value in promoting sorbent utilization and simultaneous removal of HC1 and SO₂ from waste incineration flue gas. The variety of operating conditions were tested to evaluate important factors such as spray drying reactor(SDR) outlet temperature, retention time, molar equivalence ratio( MER ), fabric filter velocity, etc. For the sorbent activity enhancement, additives such as KmnO₄, NaOH, NaHCO₃, CaCl₂, a mixture of NaOH and CaCl₂ were added to Ca(OH)₂ at optimum operating condition. The mixture of NaOH and CaCl₂ ( 2 : 1 by weight ) was found to be the best economic additive. When that additive, 10% of Ca(OH)₂ by weight, was added, under the condition of Ca(OH)₂ of MER 1.0, HCl/SO₂ removal efficiencies at fabric filter were 98.3% and 97.1%, respectively.

자기결정성과 학업 꾸물거림이 학업 스트레스에 미치는 영향: 다변량 잠재성장모형을 이용한 종단분석

배병훈,신희천 한국상담심리학회 2009 한국심리학회지 상담 및 심리치료 Vol.21 No.3

This study examined the change of academic procrastination, self-determination and academic stress together with the relation among alteration of these three variables. A total of 274 undergraduates were assessed three times from the beginning of the semester until the mid-term period. The results analyzed by the Latent Growth Model indicated that the level of academic procrastination and academic stress increased as time passed. However, self-determination motive showed no changethus, the linear model could not be applied. The results also analyzed by the multivariate Latent Growth Model revealed that self-determination and academic stress were mediated through academic procrastination in initial time. In addition, the change of academic procrastination had a positive effect on the change of academic stress. 본 연구는 잠재성장모형(Latent Growth Model)에 근거하여, 대학생들이 경험하는 학업 꾸물거림, 자기결정성, 학업 스트레스의 변화양상과 변인들 간의 관련성을 살펴보았다. 구체적으로 학업 꾸물거림을 중심으로 하여 학업 꾸물거림의 예측요인인 자기결정성과 학업 꾸물거림으로 인한 학업 스트레스가 시험을 앞두고 시간의 경과에 따라 어떻게 변화하는지를 확인하고, 이러한 변화과정에서 자기결정성과 학업 꾸물거림이 학업 스트레스에 영향을 미치는 경로를 규명하고자 하였다. 이를 위하여 대학생 274명을 대상으로 중간고사 이전까지 2주 간격으로 총 3차례의 설문조사를 통하여 자기결정성, 학업 꾸물거림, 학업 스트레스를 측정하였고, 수집된 자료는 다변량 잠재성장모형으로 분석하였다. 잠재성장모형을 통해 세 변인 각각의 변화양상을 살펴본 결과, 학업 꾸물거림과 학업 스트레스는 선형 변화모형을 적용할 수 있었지만 자기결정성은 변화모형을 적용할 수 없었다. 다음으로 다변량 잠재성장모형을 적용해서 종단적으로 세 변인 간 관계를 살펴본 결과, 자기결정성은 학업 꾸물거림의 초기값과 학업 스트레스의 초기값에 영향을 미치고 학업 꾸물거림의 초기값은 학업 스트레스에 영향을 미치는 매개경로를 확인하였다. 또한 학업 꾸물거림의 변화율은 학업 스트레스의 변화율에 영향을 미치는 것으로 나타났다.