• Ceramist
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• v.19 no.3
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• pp.89-102
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• 2016

• 월간 기계설비
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• s.322
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• pp.112-115
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• 2017

근로기준법상 법정근로간은 1일 8시간, 주40시간입니다. 정부는 4월 14일부터 인사혁신처를 시작으로 금요일 조기퇴근제를 실시할 예정이라고 하는데요. 주40시간 범위내에서 월~목까지 매일 30분씩 연장 근로하는 대신 한달 중 금 1회 오후 4시에 조기퇴근하는 방식으로 운용될 예정이라고 합니다. 공공기관에서는 이미 유연근로시간제가 실시되고 있는 사업장도 있고 별도 연장 근무 없이 Family day 또는 culture day 등으로 명명하고 월 1회 조기 퇴근하는 제도를 운용하고 있기도 합니다. 기존에 자율적으로 기업형편에 따라 실시되었던 유언근로시간제와 더불어 금 조기퇴근제도는 공기업을 중심으로 좀 더 확대될 것으로 보입니다. 다만 국가공무원법이 적용되는 공무원과 달리 민간부문에서 유연근로시간제도를 도입하고자 할 경우에는 근로기준법을 준수하여야 하므로 법률에서 정한 유연근로시간제도의 유형에 따라 취업규칙의 변경 또는 근로자대표와의 서면합의 등의 절차를 거쳐야 합니다. 금요일 4시 조기퇴근제도는 탄력적 근로시간제도의 일 유형이라고 볼 수 있기에 이번 호에서는 탄력적 근로시간제도에 대해 알아보고자 합니다.

• TTA Journal
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• s.68
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• pp.128-144
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• 2000

이동중인 최종이용자에게 전화와 저속데이터통신을 접속시켜주는 2세대무선통신은 세계전기통신산업체에서 단골로 등장하는 성공담이 되었다. 제2세대이동전화의 성장으로 이동통신이 완전한 대중시장보급을 지향하여 순조롭게 나아가고 있음을 알 수 있다. 인터넷의 엄청난 성장에 힘입어 멀티미디어 역시 폭발적인 속도로 대중시장에 보급되고 있다. 디지털셀룰러의 영역과 인터넷멀티미디어서비스가 결합함으로서 미래의 종합무선통신 및 멀티미디어접속시스템이 완성되는 것이다. 제3세대통신으로의 이전(移轉)은 종합멀티미디어, 패킷교환 및 광대역무선을 현재의 주도적인 2세대시스템에 접속하는 유연한 이전방법에 기초들 두어야 한다. 당초에 지역적으로 이들 시스템 이외의 표준을 정하였지만, 결국 표준화기관 및 전기통신산업계의 회원들이 제3세대무선접속표준에 대한 공조된 범세계 시나리오에 합의하였다. 저자는 새로이 공조된 범세계 시나리오를 설명하고, 3세대무선접속표준개발에 관한 멀티미디어와 그 유연성, 스펙트럼할당 그리고 2세대시스템으로부터 성공적인 이전 요건에 대처하는 방안을 설명한다.

• Journal of the Korean Society of Clothing and Textiles
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• v.6 no.1
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• pp.67-72
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• 1982

이 해설문에서는 최근 수년간 개발된 합성섬유에의 Comfort 가공 : Polyester 섬유의 촉감 개선, 소수성섬유에 있어서 친수성을 향상시키기 위한 화학적인 처리, 대전방지가공, 오염방지가공, 그리고 유연제에 대한 것을 문헌조사를 통해 소개하고 있다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.21 no.3
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• pp.643-650
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• 2017

The control of flexible joint robot is getting more attentions because its applications are more frequently used for robot systems in these days. This paper proposes a robust impedance controller for the flexible joint robot by using integral sliding mode control and backstepping control. The sliding mode control decouple disturbances completely but requires matching condition for disturbances. The dynamic model of flexible joint robot is divided into motor side and link side and the disturbance of the link side does not satisfy matching condition and cannot be decoupled directly by the actual input in the motor side. To overcome this difficulty, backstepping control technique is used with sliding mode control. The mismatched disturbance in the link side is changed into matched one in the respect to virtual control input which is the state controlled by actual input in the motor side. Integral sliding mode control is used to preserve the impedance control performance and the improved robustness at the same time.

• Korean Chemical Engineering Research
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• v.50 no.6
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• pp.960-968
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• 2012

In this study, the measurement of physical properties of 3 different ethylene oxide adducted zwitterionic surfactants were measured such as critical micelle concentration, surface tension, interfacial tension, contact angle, viscosity and foam stability. Also, the dual function characteristics of the zwitterionic surfactants were investigated by determining an isoelectric point, which were obtained using zeta potential measurement and QCM (quartz crystal microbalance) experiments. The isoelectric point of the synthesized zwitterionic surfactant determined by zeta potential measurement was close to that obtained by QCM experiment and both results have shown almost the same trend as that determined by the frictional property measured using an automated mildness tester. In particular, it has been observed that all three surfactants used during this study provide better softening effect at a pH of neutral condition than at an acidic or an alkaline condition. This result indicates that the synthesized surfactants act as a cationic surfactant at a pH of neutral condition and thus provide good softening effect during a rinsing cycle in the detergency process.

• Korean Journal of Ichthyology
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• v.10 no.1
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• pp.128-138
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• 1998

Comparative studies on the morphological characters of the circumorbital bone were made in order to investigate the phylogenetic relationships of the family Cyprinidae. In this paper, forty four species from Korea and three species of Gobiobotia and Saurogobio dabryi from China were studied. Pungtungia herzi, Pseudopungtungia nigra and Pseudopungtungia tenuicorpus were similar in morphological structure on points of the first infraorbital elongated. In Hemibarbus, the base portion of the opened sensor canal was transformed into a lateral plate in the infraorbital. Microphysogobio was characteristic in that the infraorbital series were large, and had close relationship with Pseudogobio esocinus and Saurogobio dabryi. Gobiobotia were reduced to a bony canal with dermal bone. Culter brevicauda had a short supraorbital. Cyprininae were characterized by larger fourth and fifth infraorbitals. Leuciscinae were divided into two groups: Moroco and Zacco. The former includes Phoxinus phoxinus, Moroco oxycephalus and Moroco kumgangensis, and the latter includes Zacco platypus, Zacco temmincki and Opsariichthys bidens. Moroco group was distinguished from Zacco group in points of having a short supraorbital and a elongated the first infraorbital.

• Polymer(Korea)
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• v.26 no.6
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• pp.778-784
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• 2002

Chemical modification of a dextran film to improve its physical properties was carried out by addition of plasticizers and crosslinking agents. Moreover, low-temperature plasma treatment with acetylene gas was done. The dextran film showed high mechanical strength but was brittle and vulnerable to moisture. When plasticizer was added, it became very soft but with large reduction of mechanical strength. However, a flexible film with fairly high mechanical strength and water resistance was prepared when the film was crosslinked by adding crosslinking agent with or after the addition of plasticizer. Treatment with an acetylene plasma changed the dextran film surface from hydrophilic to hydrophobic with little influence on the bulk properties of the film.

• 한국생물공학회:학술대회논문집
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• 2005.04a
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• pp.54-55
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• 2005

• Proceedings of the KHMA Conference
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• 2013.11a
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• pp.113-132
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• 2013