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Ultra-lightweight password CHAM is an algorithm with efficient addition, rotation and XOR operations on resource constrained devices. CHAM shows high computational performance, especially on IoT platforms. However, lightweight block encryption algorithms used on the Internet of Things may be vulnerable to side channel analysis. In this paper, we demonstrate the vulnerability to side channel attack by attempting a first power analysis attack against CHAM. In addition, a safe algorithm was proposed and implemented by applying a masking technique to safely defend the attack. This implementation implements an efficient and secure CHAM block cipher using the instruction set of an 8-bit AVR processor. 초 경량암호 CHAM은 자원이 제한된 장치 상에서 효율성이 뛰어난 덧셈, 회전연산, 그리고 XOR 연산으로 이루어진 알고리즘이다. CHAM은 특히 사물인터넷 플랫폼에서 높은 연산 성능을 보인다. 하지만 사물 인터넷 상에서 사용되는 경량 블록 암호화 알고리즘은 부채널 분석에 취약할 수 있다. 본 논문에서는 CHAM에 대한 1차 전력 분석 공격을 시도하여 부채널 공격에 대한 취약성을 증명한다. 이와 더불어 해당 공격을 안전하게 방어할 수 있도록 마스킹 기법을 적용하여 안전한 알고리즘을 제안하고 구현 하였다. 해당 구현은 8-비트 AVR 프로세서의 명령어셋을 활용하여 효율적이며 안전한 CHAM 블록암호를 구현하였다.
Objective: In the treatment of metastatic soft tissue sarcoma (STS), pazopanib is considered a standard treatment after failure of chemotherapy. We retrospectively investigated outcomes of pazopanib in patients with metastatic uterine STS. Methods: A retrospective study was performed on 35 consecutive patients with uterine STS treated with oral pazopanib 800 mg daily as salvage therapy for metastatic disease between September 2013 and December 2015. Endpoints included response rate, survival, and safety. Results: Among 35 patients, 27 (77%) had a histologic diagnosis of leiomyosarcoma (LMS) and the median age was 57 years (range, 36–70). Median number of metastatic sites was one (range, 1–5) with lung as the most frequently involved site. Pazopanib was generally well-tolerated: the major hematologic toxicity was grade 1/2 anemia (14%). Among the non-hematologic toxicities, grade 1/2 stomatitis was most commonly observed (22%), followed by fatigue and hypertension. Objective response and stable disease were observed in 10 (29%) and 11 (31%) patients, respectively. However, most cases of clinical response were observed in patients with LMS: 33% for LMS, 20% for undifferentiated pleomorphic sarcoma, and 0% for endometrial stromal sarcoma. Median progression-free and overall survivals were 5.8 months (95% confidence interval [CI]=3.6–8.1) and 20.0 months (95% CI=11.6–28.4), respectively. Conclusion: In this “real-world” retrospective study, salvage therapy with pazopanib demonstrated clinically relevant efficacy and tolerability in unselected patients with uterine STS. Although it is encouraging that outcomes for Korean patients with uterine STS were similar to those reported in the phase III trial, the clinical benefit was limited to LMS.
The demand of LNG (Liquefied Natural Gas), an environment-friendly fuel expedient, has continuously increased since its first import in the 1980’s. Due to its distinct characteristics, safety issue is primary with LNG storage facilities. However, it has rarely been studied on the maintenance of LNG storage tank’s cover, which is a composed of concrete materials. Therefore, in this study, damage detection of LNG storage tank cover is evaluated using structural diagnostic techniques : non destructive inspection techniques such as macrography, hammer sounding, schmidt hammer, ultrasonic velocity test, etc. This is frequently used for structural diagnostics.
The purpose of this study was to verify the effect of behavioral modification therapy among elementary students by comparing and analysing serum lipid between the experimental group and the control group on obese children. For this study, 44 obese children(boys: above 25% of % fat, girls: above 30% of % fat) between 11 and 12 years old S elementary school in Busan city were engaged in and were divided into two groups, each group consisting twenty two children an experimental group for behavioral modification therapy and a control group without any kind of obesity management program......