• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.1
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• pp.853-859
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• 2015

1-DOF shear building was designed, built and tested to investigate the interactions between the shear building and the shaking table excited harmonically by the electro-magnetic forces. In the experiments horizontal accelerations of the shaking table and the shear building were measured. To understand the experimental results experimental setting was modeled as an unconstrained 2-DOF system under the hormonic forces. The responses of the shear building and the shaking table of the unconstrained 2-DOF system were found with the equations of motions. The magnification factors of the table and the shear building with respect to the amplitude of the harmonic forces and the transmission of the shear building with respect to the table excitations were found and compared with the experimental results.

• Journal of Korean Institute of Industrial Engineers
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• v.27 no.4
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• pp.406-412
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• 2001

IP address lookup is to determine the next hop destination of an incoming packet in the router. The address lookup is a major bottleneck in high performance router due to the increased routing table sizes, increased traffic, higher speed links, and the migration to 128 bits IPv6 addresses. IP lookup time is dependent on data structure of lookup table and search scheme. In this paper, we propose a new approach to build a lookup table that satisfies the memory constraint. The design of lookup table is formulated as an optimization problem. The objective is to minimize average depth from the root node for lookup. We assume that the frequencies with which prefixes are accessed are known and the data structure is level compressed trie with branching factor $\kappa$ at the root and binary at all other nodes. Thus, the problem is to determine the branching factor k at the root node such that the average depth is minimized. A heuristic procedure is proposed to solve the problem. Experimental results show that the lookup table based on the proposed heuristic has better average and the worst-case depth for lookup.

• Korean Journal of Applied Biomechanics
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• v.16 no.4
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• pp.135-145
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• 2006

The aim of this study was to find out the differences of biomechanical factors from touching down the vaulting board to landing when techniques of 1/1Turn, stretched, and Tucked were performed on the old vaulting horse and on the new vaulting table. Three national representative men gymnasts were sampled for this study. Three dimension motion analyses by means of six Sony PD-150 video cameras with the velocity of 60 fps were used. As a result of analyzing the kinetic data from two kind of vaulting table, the following conclusions were made. 1. There was not significant differences of angular momentum between the old and the new vaulting table in all three techniques except the phase of stepping on the vaulting board and contacting the vaulting horse in the Tucked technique. IN the two phases above, the angular momentum in the new vaulting table was greater than that of the old vaulting horse. 2. There were few significant differences between the old and the new vaulting horses in the horizontal and vertical reaction force according to techniques when stepping was performed. However, it appeared tendency that the horizontal and vertical reaction force in the new vaulting table was a little greater than that of the old vaulting horse when the 1/1Turn, the Stretched and the Tucked were performed.

• Smart Structures and Systems
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• v.13 no.1
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• pp.137-154
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• 2014

Servohydraulic shaking tables are being increasingly used in the field of earthquake engineering. They play a critical role in the advancement of the research state and remain one of the valuable tools for seismic testing. Recently, the National Earthquake Engineering Research Center, CGS, has acquired a 6.1m x 6.1 m shaking table system which has a six degree-of-freedom testing capability. The maximum specimen mass that can be tested on the shaking table is 60 t. This facility is designed specially for testing a complete civil engineering structures, substructures and structural elements up to collapse or ultimate limit states. It can also be used for qualification testing of industrial equipments. The current paper presents the main findings of the experimental shake-down characterization testing of the CGS shaking table. The test program carried out in this study included random white noise and harmonic tests. These tests were performed along each of the six degrees of freedom, three translations and three rotations. This investigation provides fundamental parameters that are required and essential while elaborating a realistic model of the CGS shaking table. Also presented in this paper, is the numerical model of the shaking table that was established and validated.

• The Journal of Korean Association of Computer Education
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• v.10 no.1
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• pp.89-96
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• 2007

Two-way specification table for educational objectives proposed by B.S.Bloom, which is useful in reviewing and determining the objectives of instructions, is widely used in schools. However, differences in subject matters and school environments require various types of two-way specification table. Extensible markup language (XML) can be effectively applied for two-way specification table for educational objectives because it is well structured and the content of an XML document can be separated from its presentation. In this paper, the document type definition (DTD) for two-way specification table was designed. An example of XML document and XSL style sheet for the table were also presented. Furthermore, applications of the designed DTD were discussed. It is expected that the proposed DTD can be useful to various applications related to education assesment.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.05a
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• pp.189-190
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• 2006

A patient table considering x-ray transparency, mechanical safety and compact multi-axis moving mechanism has been developed. The goal of medical imaging technology is to keep radiation exposure of patients during x-raying to a minimum. In order to obtain clear pictures at low dose, however, the x-ray table which supports the patient must be sufficiently permeable to radiation to allow good image resolution. The table top is made of low density foam for x-ray transparent effective area and structural aluminum plate to connect moving mechanism under the table, covered with thin carbon fiber. This sandwich construction is very rigid and lightweight, so the table top can handle relatively heavy load comparing to its cantilevered structure which is unavoidable as long as cooperate with C-arm radiography. To verify the design results finite element static analysis and experimental tests have been done. According to the verification the results well satisfy certification guide lines as a medical device.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.6 no.3
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• pp.815-834
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• 2012

Recently, along with the innovative development of wireless communication techniques and mobile devices, mobile P2P services in mobile wireless networks have gained a lot of attention. In this paper, we propose a resource discovery scheme with data dissemination over mobile P2P networks. In the proposed scheme, each peer manages a local information table, a resource index table, and a routing table in a local database to enhance the accuracy and cost of resource discovery. The local information table stores the status of a mobile peer, and the resource index table stores the resource information of the neighbor peers via the ranking function. The routing table is used to communicate with the neighbor peers. We use a timestamp message to determine whether or not the resource index table will be changed before the resource information is exchanged. Our ranking function considers the interest and mobility of the mobile peer and prioritizes the resource information transmitted from the neighbor peers. It is shown via various experiments that the proposed scheme outperforms the existing scheme.

• Journal of the Korean Society of Food Culture
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• v.30 no.5
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• pp.562-575
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• 2015

This study intends to discover stories and sensibilities connected with characteristics and symbols of the history and culture of Sangju to develop contents about the native foods of Sangju. 'General Jeong's Table', which supplied the energy and nutrition necessary for soldiers during war, is set with Jobap, Patipguk, Euneogui, Baechumoojeon, Kongnamulheojib, Patipnamul, and Munamulsileagideanjangmuchim. 'Sangjuseong retaking wartime food', as a kind of ready-to-eat meal, which stresses convenience above everything else, is composed of Konggarujumeokbap, Bbongipjuk, Gamjangajji, and Odigojgammodeumbagitteok for table setting. 'General Jeong's liquor table', which allowed the general to regain his energy or was set to entertain generals of allied forces in the Myeong Dynasty, is formed by Baeksuk, Gojgamssam, Kongjukjijim and Sangsurisul. Efficacies of food materials were analyzed in the Part of Drug Formula of the best-known medical book in Asia. Foods on 'General Jeong's Table' has health efficacies that protect the five viscera and maintain the spleen and stomach.

• Journal of the Korean Society of Food Culture
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• v.4 no.2
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• pp.125-143
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• 1989

To analyze daily meal of royal meal, studied Soora Sang were on record Wonheng Ulmyo Jungri Euigwae(1795). Historic book 'Jungri Euigwae' described the king's visit to his father's royal tomb 'Hyun Neung Won', during the domain of Cheung Jo, the 22nd King of Choson Dynasty. The results obtained from this study are as follows. A dining table was round table with feet as black lacquer. Vessels were brazen vessel, silverware and earthenware. Kinds of dishes indicated as the number of vessels (sets). Food was arranged in two kinds of table, the first one called the main table, the second the side table. The number of sets to be arranged on the table were different according to the royal status of the eater. 15 sets for king's mother, 7 sets for the king and his elder sister, the latter sets being arranged on a single table. Soy and bean paste were ruled out from kind of sets. Kinds of dishes served with a meal generally were cooked rice (飯), soup (羹), heavy soup (助致), jerked meat (佐飯), meat fish and others broiled with seasoning (灸伊), salted fish shrimp and etc, cooked potherbs and potherbs (菜), pickled vegetables (沈菜, 淡沈菜) soy and bean paste (醬). The meat and fish and vegetable in the composition of a menu were well arranged.

• Resources Recycling
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• v.10 no.6
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• pp.35-42
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• 2001

A study was conducted in order to remove Poly vinyl chloride (PVC) from granular plastic mixture by using Air Table. The motion of plastic particle on Air Table was investigated, and separation test on the plastic mixture with the mixing ratio of PVC 10% and PE 90% was conducted. At the optimum condition obtained from this study, that is frequency of 9.2Hz, air velocity of 1.05 m/sec, End-slope of $7.5 ^{\circ}$, Side-slope of $1^{\circ}$, Feeding speed of 450 g/min, etc., we could separate the PE-PVC mixture to PE (99.96% grade and 98.9% yield) and PVC (88.7% grade and 99.6% yield).