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RISS 인기검색어
- 검색키워드
- 저자 : HyunSook Baek (검색결과 6 건)
- 무료
- 기관 내 무료
- 유료
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Reliability and Validity of the Korean Version of the Connor-Davidson Resilience Scale
HyunSook Baek,KyoungUk Lee,EunJeong Joo,MiYoung Lee,KyeongSook Choi 대한신경정신의학회 2010 PSYCHIATRY INVESTIGATION Vol.7 No.2
Objective-The Connor-Davidson Resilience Scale (CD-RISC) measures various aspects of psychological resilience in patients with posttraumatic stress disorder (PTSD) and other psychiatric ailments. This study sought to assess the reliability and validity of the Korean version of the Connor-Davidson Resilience Scale (K-CD-RISC). Methods-In total, 576 participants were enrolled (497 females and 79 males), including hospital nurses, university students, and firefighters. Subjects were evaluated using the K-CD-RISC, the Beck Depression Inventory (BDI), the Impact of Event Scale-Revised (IES-R), the Rosenberg Self-Esteem Scale (RSES), and the Perceived Stress Scale (PSS). Test-retest reliability and internal consistency were examined as a measure of reliability, and convergent validity and factor analysis were also performed to evaluate validity. Results-Cronbach’s α coefficient and test-retest reliability were 0.93 and 0.93, respectively. The total score on the K-CD-RISC was positively correlated with the RSES (r=0.56, p<0.01). Conversely, BDI (r=-0.46, p<0.01), PSS (r=-0.32, p<0.01), and IES-R scores (r=-0.26, p<0.01) were negatively correlated with the K-CD-RISC. The K-CD-RISC showed a five-factor structure that explained 57.2% of the variance. Conclusion-The K-CD-RISC showed good reliability and validity for measurement of resilience among Korean subjects.
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White-box AES implementation revisited
Baek, Chung Hun,Cheon, Jung Hee,Hong, Hyunsook Editorial Department of Journal of Communications 2016 Journal of communications and networks Vol.18 No.3
<P>White-box cryptography presented by Chow et al. is an obfuscation technique for protecting secret keys in software implementations even if an adversary has full access to the implementation of the encryption algorithm and full control over its execution platforms. Despite its practical importance, progress has not been substantial. In fact, it is repeated that as a proposal for a white-box implementation is reported, an attack of lower complexity is soon announced. This is mainly because most cryptanalytic methods target specific implementations, and there is no general attack tool for white-box cryptography. In this paper, we present an analytic toolbox on white-box implementations of the Chow et al.'s style using lookup tables. According to our toolbox, for a substitution-linear transformation cipher on n bits with S-boxes on m bits, the complexity for recovering the key obfuscated in the white-box implementation is O((3n/max(m(Q), m))2(3max(mQ,m)) + 2min {(n/m) L(m+3)2(2m), (n/m) L(3)2(3m) + n log L . 2(L/2)}), where m(Q) is the input size of nonlinear encodings, m(A) is the minimized block size of linear encodings, and L = lcm(m(A), m(Q)). As a result, a white-box implementation in the Chow et al.'s framework has complexity atmost O (min {(2(2m)/m) n(m+4), n log n.2(n/2) }), which is much less than 2(n). To overcome this, we introduce an idea that obfuscates two advanced encryption standard (AES)-128 ciphers at once with input/output encoding on 256 bits. To reduce storage, we use a sparse unsplit input encoding. As a result, our white-box AES implementation has up to 110-bit security against our toolbox, close to that of the original cipher. More generally, we may consider a white-box implementation of the t parallel encryption of AES to increase security.</P>
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Hyunsook Lee,Jae-Gwang Lee,K. S. Baek,H. N. Oak 한국자기학회 2003 Journal of Magnetics Vol.8 No.4
Ni_(0.65)Zn_(0.35)Cu_xFe_(2-x)O₄ thin films were prepared by using a sol-gel method. Their crystallographic, dielectric and magnetic properties were investigated as a function of Cu contents by means of an X-ray diffractometer (XRD), X-ray reflectivity, LCZ meter (NF2232), a vibrating sample magnetometer (VSM), and an atomic force microscope (AFM). From typical C-V measurements for Ni_(0.65)Zn_(0.35)Cu_xFe_(2-x)O₄ thin films on p-type silicon substrate, the surface charge density was calculated as 1.4 μC/㎡. The dielectric constant evaluated from the capacitance at the accumulation state was 28. The high Hc and low Msat at x=0.0 and 0.1 were due to the growth of the α- Fe₂O₃ phase having antiferromagnetic properties. The rapidly decreased Hc and increased Msat at x=0.2 and 0.3 can be explained that the α- Fe₂O₃ phases have completely disappeared at x=0.3 and so, non-magnetic defects are minimized. The Msat was slightly decreased and the Hc was increased above at x=0.3 because the increase of grain boundary due to smaller grain size acts as defects during magnetization process.
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대학생의 역기능적 진로신념과 진로관여행동의 관계에서 우연대처기술의 매개효과
백성호(Baek, SeongHo),김현숙(Kim, HyunSook) 학습자중심교과교육학회 2017 학습자중심교과교육연구 Vol.17 No.10
The purpose of this study was to investigate mediating effects of happenstance coping skills between dysfunctional career beliefs and occupational engagement of university students. The subjects were 203 students. For analysis, correlation and multiple regression analysis were utilized. The results showed as follows: First, dysfunctional career beliefs and occupational engagement showed a significant negative correlations. And dysfunctional career beliefs had a significant negative correlations with happenstance coping skills. And happenstance coping skills had a significant positive correlations with occupational engagement. Second, happenstance coping skills mediated partly the relations between dysfunctional career beliefs and occupational engagement. These results imply that it could be a effective strategy to develop education and program for enhancing happenstance coping skills to promote occupational engagement of university students as well as considering dysfunctional career beliefs 본 연구는 대학생의 역기능적 진로신념과 진로관여행동과의 관계에서 우연대처기 술의 매개효과를 검증하고자 하였다. 이를 위해 부산, 경남에 소재한 4년제 대학교에서 교양과목을 수강하는 대학생 총 203명(남 93명, 여 110명)을 대상으로 자료 수집을 하였고, 상관분석 및 위계적 회귀분석을 사용하여 검증하였다. 주요결과는 다음과 같다. 첫째, 역기능적 진로신념, 우연대처기술, 진로관여행동은 각각 유의한 상관이 있었고, 역기능적 진로신념은 우연대처기술과 진로관여행동에 부적상관을, 우연 대처기술과 진로관여행동은 정적상관을 나타냈다. 둘째, 우연대처기술은 역기능적 진로신념과 진로관여행동을 부분 매개하는 것으로 나타났다. 따라서 대학생의 진로 관여행동을 촉진하기 위해 역기능적 진로신념에 대한 개입뿐만 아니라 우연대처기 술을 증진시킬 수 있는 방안 및 프로그램 개발이 적극적으로 이루어질 필요가 있다
ScienceON
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