• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 하계종합학술대회 논문집 Ⅳ
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• pp.2439-2442
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• 2003

In this paper, we examine the acoustic characteristics of Korean vowels on pitch alteration utterance. The prosody is known as an indicator of acoustic characteristics of emotions. Also, speech is acoustically differenced according to the emotional variation and environmental variation, although speaker utters the same speech. We analyzed the spectral envelopes and formants from the voiced regions as data points on the speech waveform.

• Clinical and Experimental Pediatrics
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• 제51권11호
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• pp.1133-1135
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• 2008

The ultimate goal of the term alteration to pediatrics is that not only infants and children but also adlescents are subjet to pediatrics. At 27, June, 2007 the term pediatrics was altered to pediatrics (children and aoldescent medicine). From now on the roles of pediatricians for adolescents are needed and adolescent medicine should be reorganized in Korea. Although the numbers of children are decreased in the times of low birth rate, the efforts of pediatricians try to enlarge the range of treatment for adolescents are need.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2002년도 추계학술대회 논문집
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• pp.198-202
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• 2002

In this paper, stability of ultra precisio unit is analyzed, this unit is the kernel unit precision processing machine. According alteration of shape and material about stability investigation is performed. Through this stability investigation, trial is reduced in design and manufacture, at the time, we are accumulated foundation data for control.

• 방재와보험
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• 통권57호
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• pp.60-61
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• 1993

• 자원환경지질
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• 제23권2호
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• pp.161-181
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• 1990

The lead-zinc-silver-iron deposits from the Janggun mine are of hydrothermal-metasomatic origin, characterized by the marked hydrothermal alteration of the wallrocks, such as hydrothermal manganese enrichment of carbonate rocks, silicification, chloritization, sericitization, montmorillonitization and argillic alteration. The ore deposits have been emplaced within the Janggun Limestone of Cambro-Ordovician age at the immediate contacts with apophyses injected from the Chunyang Granite plutons of Late Jurrasic age. They have been structurally controlled by fractures in the carbonate rocks and the irregular intrusive contacts of granitic rocks, and are closely associated with hypogene manganese carbonate deposits. In the mine nine seperate orebodies are being mined. On the basis of the petrological study, hydrothermal alteration zone of this mine may be divided into the following four zones from wallrock to orebody. (I) Primary calcite and dolomite zone${\rightarrow}$(II) dolomitic limestone zone${\rightarrow}$(III) dolomitic zone${\rightarrow}$(IV) rhodochrosite zone${\rightarrow}$ orebody. There was not recongnized Mn and Fe elements in the primary calcite and dolomite zone. But, in the dolomitic limestone and dolomite zone, calcite and dolomite were subjected to weak hydrothermal manganese enrichment and the grade of the manganese enrichment increase oreward. By means of electron probe microanalysis, it was found that manganoan dolomite occured between primary dolomite grains, cross the cleavage of the primary dolomite and around the dolomite grains. Above these result supports that the Janggun manganese carbonate deposits are of hydrothermal metasomatic origin.

• 디지털융복합연구
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• 제14권10호
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• pp.375-380
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• 2016

본 연구에서는 폭주근점 변화를 통해 양안시 기능 평가의 가능성을 확인하고자 하였다. 연구대상자는 사위를 제외한 안질환이 없고 단안교정 소수 시력 1.0 이상인 30명(정시 16명, 근시 14명)이었다. 조절근점과 폭주근점, 사위검사는 평상시와 +1D의 자극 시에 측정하였다. 대상자의 폭주근점은 +1D의 자극 시 폭주근점보다 1.77cm 작게 나타났고, 근시보다 정시에서 폭주근점이 작게 나타났다. 정시 대상자에서 폭주근점과 +1D의 자극 시 폭주근점의 차이는 증가하였다. 폭주근점이 커질수록 근거리 외사위에 가까워졌으며, AC/A비는 크게 나타났다. 연구결과는 폭주근점 변화가 양안시의 참조변수인 AC/A비를 대체할 수 있는 것을 보여주었다. 다른 양안시 기능 평가 검사들과 융합하고 비교분석한다면, NPC 변화는 대체 평가지표로써 개발될 수 있을 것이다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제19권1호
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• pp.25-34
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• 1997

This study was made with lateral cephalometric radiography of 28 skeletal class III malocclusion patients that were performed to setback surgery of mandible. The 28 patients were selected by four standards as follows. 1) Set-back amount of mandible is below 10 mm 2) No extrusion and intrusion of posterior tooth or alteration of interincisial angle at period of postoperative orthodontic treatment. 3) Change of mesial segment location of mandible on lateral cephalometrics 4) No genioplasty And 28 patients were divided to three group(1,2,3 group) by degree of preoperative occlusal plane angle to Burstone's horizontal plane. The preoperative occlusal plane angle, which of 1 group was smaller than $7^{\circ}$ and 2 group was between $7^{\circ}$ to $15^{\circ}$ and 3 group was larger than $15^{\circ}$. The results were as follows : 1. As the preoperative occlusal plane angle was larger, the degree of mandibular prognathism was not severe. 2. On comparsion of preoperative and immediate postoperative cephalometric analysis, specific relationship of occlusal plane angle and set-back amount of mandible was not present. 3. As the preoperative occlusal plane angle was smaller, the alteration of postoperative occlusal plane angle was increased tendency. As the preoperative occlusal plane angle was larger, the alteration of postoperative occlusal plane angle was decreased tendency. 4. The relapsed degree of B point distance to Vertical plane was not relationship to the degree of preoperative occlusal plane angle.

• 자원환경지질
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• 제38권3호
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• pp.347-353
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• 2005

뚬방라판 지역의 지질은 페름기-석탄기의 변성암(천매암), 백악기의 화강암 및 석탄기에서 제 3기의 퇴적암과 화산암 등으로 구성되어있다. 조사지역에는 3조의 단층이 발달하며 열수용액의 통로역할을 하였으며, 이 단층을 따라서 열수용액이 주입되어 응회암내에 석영맥을 형성하였다. 열수에 의한 모암의 변질작용은 조사지역에서 주로 이질 변질작용과 프로필릭 변질작용이 우세하게 나타나며 일부 규화작용도 초래된다. 이질 변질작용은 고령토+견운모+석영+녹니석+황철석의 광물조합을 갖는다. 반면 프로필릭 변질작용은 녹니석+녹염석+장석+석영+황철석+자철석의 광물조합을 갖는다. 조사지역에는 맥상, 파쇄충진, 망상 등의 열수광상이 발달되어 있다 석영맥과 변질암 시료들의 분석결과 금이 0.01g/t에서 4.6g/t으로 나타났다.

• Restorative Dentistry and Endodontics
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• 제39권3호
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• pp.201-209
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• 2014

Objectives: This study evaluated the solubility, dimensional alteration, pH, electrical conductivity, and radiopacity of root perforation sealer materials. Materials and Methods: For the pH test, the samples were immersed in distilled water for different periods of time. Then, the samples were retained in plastic recipients, and the electrical conductivity of the solution was measured. The solubility, dimensional alteration, and radiopacity properties were evaluated according to Specification No. 57 of the American National Standards Institute/American Dental Association (ANSI/ADA). Statistical analyses were carried out using analysis of variance (ANOVA) and Tukey's test at a significance level of 5%. When the sample distribution was not normal, a nonparametric ANOVA was performed with a Kruskal-Wallis test (${\alpha}$ = 0.05). Results: The results showed that white structural Portland cement (PC) had the highest solubility, while mineral trioxide aggregate (MTA)-based cements, ProRoot MTA (Dentsply-Tulsa Dental) and MTA BIO ($\hat{A}$ngelus Ind. Prod.), had the lowest values. MTA BIO showed the lowest dimensional alteration values and white PC presented the highest values. No differences among the tested materials were observed in the the pH and electrical conductivity analyses. Only the MTA-based cements met the ANSI/ADA recommendations regarding radiopacity, overcoming the three steps of the aluminum step wedge. Conclusions: On the basis of these results, we concluded that the values of solubility and dimensional alteration of the materials were in accordance with the ANSI/ADA specifications. PCs did not fulfill the ANSI/ADA requirements regarding radiopacity. No differences were observed among the materials with respect to the pH and electrical conductivity analyses.

• Biotechnology and Bioprocess Engineering:BBE
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• 제11권6호
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• pp.484-488
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• 2006

Alteration of illumination with optimum carbon dioxide fixation-based curve in this research successfully enhanced the $CO_{2}-fixation\;(q_CO_{2}$ capability of Chlorella vulgaris Buitenzorg cultivated in a bubble column photo bioreactor. The level of $CO_{2}$ fixation was up to 1.91 times that observed from cultivation with intensification of illumination on an optimum growth-based curve. During 144 h of cultivation, alteration of light intensity on an optimum $CO_{2}-fixation-based$ curve produced a $q_CO_{2}$ of $12.8\;h^{-1}$. Meanwhile, alteration of light intensity with a growth-based curve only produced a $q_CO_{2}$ of $6.68\;h^{-1}$. Increases in light intensity based on a curve of optimum $CO_{2}-fixation$ produced a final cell concentration of about 5.78 g/L. Both cultivation methods were carried out under ambient pressure at a temperature of $29^{\circ}C$ with a superficial gas velocity of $2.4\;m/h(U_{G}$. Cells were grown on Beneck medium in a 1.0 L Bubble Column Photo bioreactor illuminated by a Phillips Halogen Lamp (20 W/12 V/50 Hz). The inlet gas had a carbon dioxide content of 10%.