• Journal of the Institute of Electronics Engineers of Korea TE
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• v.39 no.4
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• pp.409-412
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• 2002

The LNA(Low Noise Amplifier) is designed for use in low cost commercial application covered fully IMT-2000 band(1920~2170MHz, BW=250MHz). It is optimized source inductance for source lead and designed to equivalent etched line. The LNA uses a high pass impedance matching network for noise match and simple structure. The bias circuit designs have been made self-biased with a negative voltage applied to gate. The power supply voltage is 8V, total current is 180mA. The LNA is biased at a Vgs of -0.4, Vds of 4V for first stage and Vds of 5V for second stage. The LNA is designed competitively for commercial product specification. The measured gain and noise figure of the completed amplifier was 20dB and 1dB, respectively. Also, input VSWR, P1dB and gain flatness was measured of 1.14 ~ l.3dB, 22.4dBm and $\pm$0.45dB, respectively. The designed LNA can be used for commercial product.

• Journal of the Institute of Electronics Engineers of Korea TE
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• v.39 no.4
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• pp.335-340
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• 2002

In this paper, the stress induced leakage currents of thin silicon oxides is investigated in the ULSI implementation with nano structure transistors. The stress and transient currents associated with the on and off time of applied voltage were used to measure the distribution of high voltage stress induced traps in thin silicon oxide films. The stress and transient currents were due to the charging and discharging of traps generated by high stress voltage in the silicon oxides. The transient current was caused by the tunnel charging and discharging of the stress generated traps nearby two interfaces. The stress induced leakage current will affect data retention in electrically erasable programmable read only memories. The oxide current for the thickness dependence of stress current, transient current, and stress induced leakage currents has been measured in oxides with thicknesses between 113.4${\AA}$ and 814${\AA}$, which have the gate area $10^3cm^2$. The stress induced leakage currents will affect data retention and the stress current, transient current is used to estimate to fundamental limitations on oxide thicknesses.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.37 no.11
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• pp.43-49
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• 2000

In this paper, we have modeled and fabricated $1{\times}5$ equal power splitter for 1.55${\mu}m$ wavelength using finite-difference beam propagation method and $Ag^+-Na^+$ ion-exchanged method in BK7 glass, respectively. The power splitting ratio could be controlled by changing the center waveguide gap and the inner Y-branch angle. As a result, the power splitting ratio shows 0.46dB when the waveguide width, the inner Y-branch angle and the center waveguide gap are 4.5${\mu}m$, 0.3 degree and 575${\mu}m$, respectively.

• Journal of the Institute of Electronics Engineers of Korea TE
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• v.42 no.3
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• pp.51-56
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• 2005

To improve the BER of OFDM on a fading channel, a low-density parity check coded OFDM system is proposed in this paper. LDPC codes are decoded with Sum-Product or Belief Propagation Algorithm known by probability propagation algorithm. When LDPC codes are applied to OFDM system, the BER performance is dependant on the iteration number of decoding. To improve the spectral efficiency, multi-level modulations are used in mobile communication system. But, It is not clear how to decode LDPC code used in OFDM with multi-level modulations. In the paper, a decoding algorithm is described for LDPC coded OFDM with MPSK. When use the proposed decoding algorithm, we get the good BER for AWGN and a Fading Channel. Simulation results show that the proposed decoding algorithm is confirmed LDPC coded OFDM with MPSK.

• Journal of the Institute of Electronics Engineers of Korea TE
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• v.42 no.3
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• pp.45-50
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• 2005

A UV camera is being used in various application regions such as industry, medical science, military, and environment monitoring. A ROIC(ReadOut IC) is developed and can read the responses from UV photodiode sensors which are made with III-V nitride semiconductors of GaN series haying high resolution and high efficiency. To design FPA(Focal Plane Array) UV $8{\times}8$ ROIC, the photodiode type sensor devices are modeled as the capacitor type ones. The ROIC reads out signals from the detector at)d outputs sequentially pixel signals after amplifying and noise filtering of them. The ROIC is fabricated using the $0.5{\mu}m$ 2Poly 3Metal N-well CMOS process. And then, it and photodiode array are hybrid bonded by gold stud bumping process using ACP(Anisotropic Conductive Paste). After the packaging, UV images appearing on PC verified the operations of the ROIC.

• Korean journal of applied entomology
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• v.36 no.3
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• pp.237-242
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• 1997

Comparative studies on suppression possibility with three phytoseiid mite species (An.thly,seiu,sw omersleyi Schicha. A. ,fidIrrc~i.Gs arman and T\ulcornerphlorlrotiiu.s oc~c~idetitaliNs esbit) to the two-spotted spider mite (Te~trrrt~yc.Iir~l~l\ulcorner.i\c .(re Kwh) on kidney bean leaves in field and greenhouse were carried out. In the field experiments with the initial prey -predator ratio of 4 : 1. I0 : I and 20: I . A. ,firllrrcis suppressed successfully the prey populations at all three ratios 17 days after the initial infestation. A. wornc,r-;leyi \uppressed the prey population only at the ratio of 4 : 1, while T. oc~c~ideritcr1iw.s as unable to suppress the prey population at all tested ratios. In the greenhouse experiments with the initial prey-predator ratio of 10: 1, A. jil1ltrci.s could suppress the prey population continuously during the infestation period. A. ~~otnc~r,slceoyuil d suppress the prey population for 13 days after the initial infestation, while T. occie1mttrli.s could suppress the prey population for 8 - 23 days after the initial infestation.

• The Journal of Korean Academy of Prosthodontics
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• v.54 no.4
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• pp.445-450
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• 2016

Piezography, prosthetic space recorded by pronunciation, can be used as a reference for arrangement of artificial teeth and polishing surface of a denture. In this case, a 67 year old female patient was presented for new dentures. Old dentures had class II relationship and poor retention. For fabrication of stable dentures, using piezography and lingualized occlusion was planned. After taking impressions with conventional method, conventional denture bases with wax rim were fabricated. Then, additional mandibular denture base was fabricated for piezography. With fast setting silicon impression material, piezography was recorded by using six pronunciations, 'si', 'so', 'me', 'te', 'de', and 'mu'. According to the piezographic space, mandibular artificial teeth were arranged and modified for lingualized occlusion. As a result, the patient was satisfied with new dentures functionally and esthetically.

• BMB Reports
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• v.35 no.4
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• pp.432-436
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• 2002

Pseudomonas sp. S-47 is capable of degrading catechol and 4-chlorocatechol via the meta-cleavage pathway. XyITE products catalyze the dioxygenation of the aromatics. The sylT of the strain S-47 is located just upstream of the xylE gene. XylT of the strain S-47 is located just upstream of the xylE gene. XyIT is typical chloroplast-type ferredoxin, which is characterized by 4 cystein residues that are located at positions 41, 46, 49, and 81. The chloroplast-type ferredoxin of Pseudomonas sp. S-47 exhibited a 98% identity with that of P. putida mt-2(TOL plasmid) in the amino acid sequence, but only about a 40 to 60% identity with the corresponding enzymes from other organisms. We constructed two recombinant plasmids (pRES1 containing xylTE and pRES101 containing xylE without xylT) in order to examine the function of XyIT for the reactivation of the catechol 2,3-dioxygenase (XyIE) that is oxidized with hydrogen peroxide was recovered in the catechol 2,3-dioxygenase (C23O) activity about 4 mimutes after incubation, but the pRES101 showed no recovery. That means that the typical chloroplast-type ferredoxin (XyIT) of Pseudomonas sp. S-47 is involved in the reactivation of the oxidized C23O in the dioxygenolytic cleavage of aromatic compounds.

• Journal of the Korean Society of Costume
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• v.19
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• pp.175-194
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• 1992

Le Proche-Orient est le pays de la Bible, Le peuple He breu ancien, appartenant la race des S mits s mi-nomades, est venu avec Abraham, de m sopotamie en Palestine, terre de Canaan. Nous avons consid r les v tements du peuple des anciens H breux en nous basant sur la Bible et en observant des peintures murales et des bas-reliefs des divers payes de l'ancienne poque, Pour comprendre l' volution des v tements des gens de la pr sente r gion palestinienne, nous avons tudi les v tements traditionnels de la race b douine qui m nent jusqu' maintenant une vie nomade dans le m nent jusqu' maintenant une vie nomade dans le d sert, parce que nous n'avons pas pu connaitre le processus d' volution des v tements apr s l'ancienne poque la suite d' v nements historiques compliques. En conclusion, nous pouvons nous r sumer comme suit: 1) Nous pensons que la kimlah, costume important du peuple h breu ancien est devenu abajeh, manteau des B douins, puisque ces v tements servent prot ger le corps lors des changments de temps, et la nuit on les utilise comme couverture et comme sac pour y mettre des objets, et comme tente lors su travail. en un mot, les fonctions de la Simlah et celles de l'abajeh sont les memes l' poque ancienne et maintenant. 2) Nous pensons que la forme et l'utilisation de la Kethoneth ayant une forme de tunique et de la thob des B douins sont presque semblable. La kethoneth et la thob sont la tuniqu importante que portent jusqu' maintenant tous les peuples du Proche-Orient. 3) Comme on le voit dans la Bible, les femmes du peuple h breu et celles des B douins utilisent le voile pour couvrir la e te, et se servent d'accessoires pour d corer leur corps. A l'avenir, les vVtements des Palestiniens, dans une recherche pous approfondie, feront l'objet de a 2 me partie de l' tude des costumes du Proche-Orient.

• The Korean Journal of Community Living Science
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• v.22 no.1
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• pp.5-20
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• 2011

It is very important that the development of rural tourism resources and contents for agritourism increases rural household income and vitalizes local economy. In this sense, accelerating the rural traditional food materials into resources plays significant roles for the local economy. The farm-restaurant project, as a part of a development of rural traditional foods can not only help popularize the rural food-culture, but it also promote the consumption of local products by urban customers. It is difficult to manage both types of restaurants which are the dining type and the experience-centered farm restaurants as a farmer. In particular, the managers of the farm restaurants have some operational problems in developing a new menu and an experiential-program using their local farm products. The purpose of this study was to present steps that can be used for the existing menu-improvement and developing new menu processes of the farm restaurants that have been in operation for more than two years. By the purpose of menu developing for a restaurant, this research is designed for the case study. For collecting date for the study, we gained knowledge about the issues concerning menus from in depth interviews with the managers in two subject farm restaurants. The results suggested that a new menu, such as table d'h$\^{o}$te, $\`{a}$ la carte meals, specialties, kids meal, various dressing, are based on solving issues such as a limitation of food materials and the necessity of a kids meal in dining type of farm restaurants. Also, the suggested new menu, such as seasonal specialties and side dishes, are based on solving issues such as urgent development of various experiential programs and necessity of seasonal specialties in experiential type of farm restaurants.