• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 B
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• pp.765-766
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• 2006

Interior Permanent Magnet Synchronous Motor(IPMSM) have many advantages such as high power density, wide speed range and so on. With the IPMSM, miniaturization and energy efficient design can be achieved in comparison with Surface Permanent Magnet Synchronous Motor(SPMSM). In order to secure miniaturization and manufacturing efficiency of the motor, it has concentrated winding, because concentrated winding can reduce the motor volume and make manufacturing to be simple compared with the distributed winding. However, according to the pole-slot combinations motor parameters can be changed and unexpected normal force can be generated. Especially, unbalanced normal force in airgap can cause serious vibration and acoustic problem. Accordingly, in this paper, normal force and parameters variation of concentrated winding IPMSM are investigated according to the pole-slot combinations.

• Journal of Microbiology and Biotechnology
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• 제24권11호
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• pp.1473-1483
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• 2014

Reports of herbicide resistance events are proliferating worldwide, leading to new cultivation strategies using combinations of pre-emergence and post-emergence herbicides. We analyzed the impact during a one-year cultivation cycle of several herbicide combinations on the rhizobacterial community of glyphosate-tolerant Bt-maize and compared them to those of the untreated or glyphosate-treated soils. Samples were analyzed using pyrosequencing of the V6 hypervariable region of the 16S rRNA gene. The sequences obtained were subjected to taxonomic, taxonomy-independent, and phylogeny-based diversity studies, followed by a statistical analysis using principal components analysis and hierarchical clustering with jackknife statistical validation. The resilience of the microbial communities was analyzed by comparing their relative composition at the end of the cultivation cycle. The bacterial communites from soil subjected to a combined treatment with mesotrione plus s-metolachlor followed by glyphosate were not statistically different from those treated with glyphosate or the untreated ones. The use of acetochlor plus terbuthylazine followed by glyphosate, and the use of aclonifen plus isoxaflutole followed by mesotrione clearly affected the resilience of their corresponding bacterial communities. The treatment with pethoxamid followed by glyphosate resulted in an intermediate effect. The use of glyphosate alone seems to be the less aggressive one for bacterial communities. Should a combined treatment be needed, the combination of mesotrione and s-metolachlor shows the next best final resilience. Our results show the relevance of comparative rhizobacterial community studies when novel combined herbicide treatments are deemed necessary to control weed growth.

• International Journal of Concrete Structures and Materials
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• 제3권1호
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• pp.11-14
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• 2009

This paper is interested in the incorporation of crushed sand and desert sand in the composition the self compacting concretes (SCC). Desert dune sand, which has a fine extra granulometry, and the crushed sand, which contains an important content of fines, can constitute interesting components for SCC. Part II consists in studying the behaviour of SCC containing various sands with different origins. These sands, with different sizes, consist of several combinations of rolled sand (RS), crushed sand (CS) and desert sand (DS). The study examines the influence of the granular combination of sands on the characteristics in the fresh and the hardened state of SCC. The results of the experimental tests showed an improvement of the workability of the fresh SCC by combining sands of varied granulometry. The addition of the DS to CS or to RS allowed the increase of the mixture viscosity but decreased the mechanical strengths. Furthermore, the CS-RS combinations increased the compressive and the tensile strengths of the studied SCC. The optimized formulations of sands gave the highest performances of the SCC.

• 한국건설순환자원학회논문집
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• 제7권3호
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• pp.85-90
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• 2012

In this study, temperature profile of the fly ash concrete were studied in accordance with the change of heating curing method combination for the slab concrete in order to develop efficient protection method of the concrete subjected to $-20^{\circ}C$. The slab concretes with the size of $1200mm{\times}600mm{\times}200mm$ were fabricated with W/B of 50% and exposed to $-20^{\circ}C$ for 7 days. Five different combinations of heat curing methods were applied to the slab concrete specimen; two combinations of heat supplying by electrical heater and surface heat insulation material such as polyethylene film and quadrupled layer bubble sheet based on heat enclosure installment; three combinations of heating coil embedment and surface heat insulation materials such as polyethylene film, sawdust and quadrupled layer bubble sheet based on heat enclosure installment. Test results showed that by applying both heating coil and bubble sheet and heat enclosure, the concrete exposed to $-20^{\circ}C$ can be effectively protected from early-age frost damage.

• Structural Engineering and Mechanics
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• 제56권6호
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• pp.1095-1113
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• 2015

Jute rope is one of the most popular materials used for composites in various industries and in civil engineering. This experimental study investigated two types of jute rope with different diameters for jute rope composite plates to determine the best combination of jute rope and carbon fiber in terms of ratio and physical and mechanical properties. Eight combinations of carbon fiber and jute rope with different percentages of carbon fiber were analyzed. Tensile tests for the jute rope composite plate and hybrid jute rope composite were conducted, and the mechanical and physical properties of the specimens were compared. Thereafter, the ideal combinations of jute rope with an optimum percentage of carbon fiber were identified and recommended. These particular combinations had tensile strengths that were 2.23 times and 1.76 times higher than other varieties in each type.

• International Journal of Industrial Entomology and Biomaterials
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• 제25권1호
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• pp.123-127
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• 2012

An experiment was carried out to boost the production of tasar crops through application of secondary nutrients. Different combinations of secondary nutrients were prepared and its effect was studied on the yield and quality of leaves of tasar food plant Terminalia tomentosa W & A with 2.4 m ${\times}$ 2.4 m spacing and cocoon characters of tasar silkworm Antheraea mylitta Drury reared on them. Among different combinations of secondary nutrients, foliar application of magnesium sulphate (2%, w/v) and basal application of 3 quintal/ha of calcium carbonate (secondary nutrient combination SM5) was found to be the best in crop improvement. It improves the quantity and quality of leaves as well as the commercial characters of cocoons. As a result, silk production improves. Under this combination, leaf yield increased by 26.55% in comparison to control. Average increase in moisture, total mineral, crude protein and total carbohydrate was 3.26%, 20.84%, 15.39% and 17.85% respectively as compared with control. Further, bio assay studies revealed that average larval weight, E.R.R., cocoon weight, shell weight and silk ratio percent increased by 11.25%, 25.71%, 20.05%, 35.14% and 12.17% respectively over control which indicates that secondary nutrient combination $SM_5$ has significant role in improving the production of tasar crops.

• 한국HCI학회논문지
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• 제5권1호
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• pp.19-24
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• 2010

색감정 형용사쌍을 이용하여 단색과 두가지 색을 조합한 배색에서 느낀 감정을 조사를 하였다. 열 개의 색감정형용사쌍을 이용해서 5개의 단색 컬러패치와 두가지 색을 조합한 10개의 배색 컬러패치의 색감정을 측정했다. 20명의 참가자들이 관측 실험에 참가했으며 같은 실험을 영어와 한국어로 진행했다. 실험 결과, 영어와 한국어의 색감정관계에서 언어의 차이는 크지 않았다. 두가지 색을 배색했을 때의 색감정은 각각의 단색을 평균했을 때의 색감정으로 대체적으로 만족스럽게 예측할 수 있었다. 그러나 몇몇의 경우에서 두가지 색이 배색되었을 때의 색감정이 하나의 단색의 색감정보다 강하게 나타난 경우가 발견되었다.

• 대한방사선기술학회지:방사선기술과학
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• 제11권2호
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• pp.21-26
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• 1988

Newly developed orthochromatic film HR series have many different types according to high speed, high resolution and special latitude. And now authors have practiced various screen-film combinations, those were usual regular type Fuji new RX film-LT screen and orthochromatic type HR films-rare earth G3, G4 screens. As a result of the experiment, we obtained high speed with high resolution and expansion of diagnostic range on the following combinations compared with usual new RX/LT series. Those combinations were RXO-G and HR-L films to skull, HR-G films to knee joint and hand part, HR-L film to abdomen. Therefore it may be desirable to select adquate kinds of HR series films according to investigated parts.

• 전자공학회논문지
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• 제52권7호
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• pp.119-124
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• 2015

배경잡음에 강인한 음성인식을 위한 전처리기로써 음성향상 기법이 요구되고 있다. 코드북 기반의 음성향상 기법은 기존 잡음 추정 알고리즘들과 비교하여 nonstationary 배경잡음 환경에 강인하다는 장점이 있다. 하지만 코드북 정보에 의존적이기 때문에 입력신호와 상관성이 떨어지는 코드벡터의 조합을 사용할 경우 성능이 급격히 떨어진다는 단점이 있다. 본 논문에서는 학습된 음성과 잡음 코드벡터를 조합하는 과정에서 입력신호와 상관성이 떨어지는 코드벡터의 조합을 제거함으로써, Log-Spectral Distortion (LSD)과 Perceptual Evaluation of Speech Quality (PESQ) 관점에서 기존 코드북 기반 알고리즘의 성능을 향상시켰다.

• 비교문화연구
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• 제22권
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• pp.355-375
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• 2011

This paper investigates multiple marking of evidentials in Korean. Korean has 4 evidential markers: Present Sensory -ney, Past Sensory -te-, Inference -keyss-, Reported -ay. Korean allows evidential marked more than once in the same clause. Not all the possible combinations of evidential markers are, however, observed in Korean. Only five combinations of evidential markers are allowed: Inference followed by Past Sensory (-keysste-), Inference followed by Present Sensory (-keyssney), Past Sensory followed by Reported (-teray), Inference followed by Reported (-keysstay), Inference followed by Past Sensory and Reported (-keyssteray). Multiple making of evidentials in Korean seems to follow combination restrictions: i) Inference comes before Direct Knowledge, ii) Present Sensory and Reported cannot be marked in the same clause, iii) Reported must come after other evidential markers, iv) Past Sensory and Present Sensory cannot be marked in the same clause. Because of these restrictions, only 5 out of dozens possible multiple evidential marking combinations are observed in Korean. This paper takes inflectional suffixes including evidential markers in Korean as syntatic markers and argues that syntactic markers have their own scope and contribute semantic meaning to the scope not to the full sentence. Evidential markers in double marking have different syntactic scope and add not contradictory but complementary meanings to the preposition to express subtle and delicate evidential-related meanings.