• 제어로봇시스템학회논문지
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• 제6권12호
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• pp.1045-1052
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• 2000

In this paper, we propose a method to apply the Input Shaping Technique (IST) to multi-input multi-output (MIMO) systems. In MIMO systems, there is a high possibility of multi-mode residual vibration. The IST filter designed for this multi mode may need a longer time to suppress the residual vibration. Previous works prove that we can shorten the time lag by using negative sequence. This negative sequence, however, causes another problem - it requires excessive control input. In this paper, we provide a remedy to reduce the size of control input by limiting the reference input by limiting the reference input and its derivative. The result of simulations and experiments on a 2 link flexible arm confirmed the effectiveness of the proposed method.

• Wind and Structures
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• 제4권1호
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• pp.45-62
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• 2001

This paper is focused on the torsional effects that are induced on bridge piers by unbalanced wind buffeting on the deck during double cantilever erection stages. The case of decks with variable cross section is considered in particular as this characteristic is typical of most frame bridges that are built by the cantilever method. The procedure outlined in the paper is basically an application of the method that Dyrbye and Hansen (1996) have illustrated for decks with constant cross section. This format was chosen because it is suitable for design purposes and may easily be implemented in structural codes. As a complement, the correspondence with the format that is adopted in the Canadian code (NBCC 1990) for the gust factor is established, which might be useful to bridge designers used to the North-American approach to the gust effects on structures. Only alongwind turbulence and horizontal movements of the deck are considered. The combination of torsional and bending effects is also discussed and it is illustrated with an example of application.

• Steel and Composite Structures
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• 제4권1호
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• pp.49-75
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• 2004

The paper derives, validates and illustrates the application of GBT-based formulae to estimate distortional critical lengths and bifurcation stress resultants in cold-formed steel rack-section columns, beams and beam-columns with arbitrarily inclined mid-stiffeners and four support conditions. After a brief review of the Generalised Beam Theory (GBT) basics, the main concepts and procedures employed to obtain the formulae are addressed. Then, the GBT-based estimates are compared with exact results and, when possible, also with values yielded by formulae due to Lau and Hancock, Hancock and Teng et al. A few remarks on novel aspects of the rack-section beam-column distortional buckling behaviour, unveiled by the GBT-based approach, are also included.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권3호
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• pp.1311-1320
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• 2016

The fourth industrial revolution is currently proceeding and is expected to significantly affect the way individuals live and in result change the society in various aspects. The ICT-based convergence industries of the fourth industrial revolution contain various fields such as driverless cars, lighter and tougher materials, robotics, 3D printing and even biotechnology. This paper examines the researches done in fourth industrial revolution field based on the articles submitted to APIC-IST 2015. The topics from articles related to the fourth industrial revolution were categorized based on the keyword frequency of main issues. Results suggested that IoT and Wireless sensor network related researches were among the fields that the most researches were done in it and topics like nanotechnology, biotechnology, driverless cars, sharing economy and 3D printing were not mentioned at all. This paper also suggests necessary contents in the fourth industrial revolution to be focused on for further research in this field.

• 한국독어학회지:독어학
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• 제10집
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• pp.67-95
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• 2004

In diesel Albeit wird belegt, dass sich die Entstehung des Germanischen nicht als organische, $ausschlie{\ss}lich$ intern motivierte Weiterentwicklung des $Indoeurop\"{a}ischen$ verstehen $l\"{a}sst$, sondern dass substraie und superstrale Kontaktsprachen, bzw. Kontakt-sprachfamilien an seiner Entstehung beteiligt waren, namlich das mitl dem heutigen Baskischen verwandte Vaskonische und das mit dem heutigen Hamito-Semitischen verwandte Atlantische. Als Beweise $f\"{u}r$ $nicht-indoeurop\"{a}ische$ Kontakte des $Indoeurop\"{a}ischen$ werden $angef\"{u}hrt$ die Lexik und Strukturmerkmale der Ortsnamen, der $gro{\ss}e$ nicht aus dem Indoeuropaischen deutbare Anteil des Wortschatzes, der Initialakzent, die Systematisierung des Ablauts in starken Verben und die Spaltung der Wortstellung. Dabei wird deutlich, dass das Germanische ist substral vaskonisiertes, superstral semitisiertes $Indoeurop\"{a}isch$ ist.

• Journal of Communications and Networks
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• 제4권4호
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• pp.292-301
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• 2002

Wireless LAN technology is complementary to 3G systems and could be used to provide high bandwidth hotspot coverage, for example in railway stations and offices, in order to provide the high bandwidth video and broadband services such as those emerging on DSL fixed access. The IST Projects BRAIN and MIND have investigated a number of key technical enablers for such a system beyond 3G. These include scenarios and business models, design of an all-IP access network, consideration of ad hoc network extensions, enhancing Wireless LAN efficiency and compatibility with IP and, finally, terminal middleware and signalling for rapid adaptations to network QoS changes.

• 미생물학회지
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• 제3권2호
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• pp.27-43
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• 1965

Wir haben das Wachstum und Chloropbyllzunahme und -abnahme bei der Autotroph-, Mixotroph-, und Heterotrophanzucht analysiert, und ob Glukose-Chlorose von Stickstoffi-nangel verursacht wird, oder Glukose die Chlorophyllbildung unterdriickt, und wie Lipid und Stdrke gebildet worden ist. Wir wollten bei Glukose-Chlorose Zucker, Stickstoff und Chlorophyll drei Verhiiltnisse untersuchen. Chlorella variegate fehlte Nitrat-Reduktase. Sie wachste nicht mit $KNO_3$ als stickstaffquelle und bildete kein chlorophyll bei Heterotroph und unterdrilckte chlorophyllbildung bei Mixotroph. Akkumulation von Lipid und Stdrke war nicht so viel wie bei Mineralsalz mangelchlorose. Chlorella variegate brauchte nicht $CO_2$ die Oxydationsphosphorylierung aber $O_2$ ist notig. Durch DNP und Fluoracetat blockierte Chlorella variegate die oxydationsph-osphorylieriing. Zell-Vermehrung und Koblenhydratbildung sind reduziert worden, aber nicht normal.

• 대한가정학회지
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• 제20권4호
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• pp.177-184
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• 1982

Die Arbeit im Haushalt, der unmittelbaren Versorgung des Menschen gilt, D rfte der lteste Begriffsinhalt von Arbeit berhaupt sein. Diese Arbeit im Haushalt zur unmittelbaren Daseinsvorge steht heute aber in unserer Gesellschaft in zunehmendem Make zur Disposition. Solange in einer Gesellschaft Arbeiten oder Arbeits bereiche der Daseinsvorsorge ganz selbstverst nd lich bernommen werohen, weil sie nicht delegierbar erscheinen und gen gend menschen f r diese Aufgaben verf gbar sind, werden ihr Wert und ihre Bedeutung dem einzelnen und der gesellschaft haum bewupt. Wir be handeln die leistung der Familien hansfrauen wie die gute Luft. Die Leirtung wird selbstuerst ndlich erwartet, und erst eine nicht erbrachte Leistung erregt pers nlichesoder gesellschaftliches Aufsehen. Die Volkswirtschaftliche Gesamtrechung ist auch ohne produktions-und Kapitalkonto der privatin Haushalte konzipiert worden. Eine Diskussion um wert und Bewertung der Hausarbeit ist nicht nur eine Frage der volkswirt schaftlichen Rechnungs fuhrung. Sie rept dar ber hinaus an, den Bestimmungs faktoren an suchen, die dazu f hrten, da$\beta$ die Hausarbeit heute so wertlos erscheint, da$\beta$ ann hernd niemand sie erlernen und nur noch wenige sie machen mochtan.

• Steel and Composite Structures
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• 제6권3호
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• pp.221-236
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• 2006

The objective of this work is to describe the main steps involved in the derivation of a GBT (Generalised Beam Theory) formulation to analyse the vibration behaviour of loaded cold-formed steel members and also to illustrate the application and capabilities of this formulation. In particular, the paper presents and discusses the results of a detailed investigation about the local and global free vibration behaviour of lipped channel simply supported columns. After reporting some relevant earlier GBT-based results dealing with the buckling and vibration behaviours of columns and load-free members, the paper addresses mostly issues concerning the variation of the column fundamental frequency and vibration mode nature/shape with its length and axial compression level. For validation purposes, some GBT-based results are also compared with values obtained by means of 4-node shell finite element analyses performed in the code ABAQUS.

• Nuclear Engineering and Technology
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• 제34권4호
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• pp.331-343
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• 2002

We performed an importance analysis of In-Service Testing (157) components for Ulchin Unit 3 using the integrated evaluation method for categorizing component safety significance developed in this study. The developed method is basically aimed at having a PSA expert perform an importance analysis using PSA and its related information. The importance analysis using the developed method is initiated by ranking the component importance using quantitative PSA information. The importance analysis of the IST components not modeled in the PSA is performed through the engineering judgment, based on the expertise of PSA, and the quantitative and qualitative information for the 157 components. The PSA scope for importance analysis includes not only Level 1 and 2 internal PSA but also Level 1 external and shutdown/low power operation PSA. The importance analysis results of valves show that 167 (26.55%) of the 629 IST valves are HSSCs and 462 (73.45%) are LSSCs. Those of pumps also show that 28 (70%)of the 40157 pumps are HSSCs and 12 (30%) are LSSCs.