• Title/Summary/Keyword: Central mounting

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Acceleration of Mounting in Self Mounting Method and Its Effect on Cocooning, Cocoon Characters and Reeling Parameters in Silkworm Bombyx mori L.

  • Himantharaj, M.T.;Das, Kakali;Kumari, K.M.Vijaya;Rajan, R.K.
    • International Journal of Industrial Entomology and Biomaterials
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    • v.4 no.1
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    • pp.19-22
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    • 2002
  • Rotary mountages are the best mountages among all the mountages that are used in sericultural areas. But to use this mountage more space, separate mounting hall & requires more labour to pickup the matured worms. to over come these problems, self mounting method is adopted to save the time Er labour, But the mounting rate is generally less. To accelerate the mounting rate different repellents viz; saw dust, phytoecdysone, 1% cresol with paddy husk, lime, kaolin, gormalin chaff were used in the present study. The results indicated that highest number of larvae climbed the mountage in 1% cresol with paddy husk, followed by phytoecdysone and lime. It is observed that the use of repellents at wandering stage accilerates mounting rate and did not affect the quality of the cocoons and reeling characters.

Early and Uniform Maturation in Silkworm Bombyx mori L. by Phytoecdysteroid Extracted from a Plant of Family Caryophyllaceae

  • Trivedy, Kanika;Nair, K.Sashindran;Ramesh, M.;Gopal, Nisha;Kumar, S.Nirmal
    • International Journal of Industrial Entomology and Biomaterials
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    • v.7 no.1
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    • pp.65-68
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    • 2003
  • One of the biggest problems encountered during the last phase of silkworm rearing is non-uniform maturation of the silkworms especially during cooler months. Phytoecdysteroid (20-hydroxy ecdysone) was extracted in large-scale from a plant belongs to Caryophyllaceae and fed to silkworm larvae to test the effect of phytoecdysteroid. About 80% of the silkworms were ready for mounting by 18 hrs after treatment (when the treatment is done for uniform spinning), whereas in control batch only 37% worms were ready for mounting by the same time.

Comparative Study of Commercial Characters of Cocoon Produced by Ripe and Unripe Bivoltine Larvae (Bombyx mori L.) Mounted at Different Maturation Levels

  • Rahmathulla, V.K.;Haque, S.Z.;Geetha Devi, R.G.
    • International Journal of Industrial Entomology and Biomaterials
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    • v.7 no.1
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    • pp.79-82
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    • 2003
  • To study the effect of mounting fully ripe and unripe silkworms at different maturation percentage, the ripe and unripe silkworms were mounted separately and observed the cocoon and reeling characters. The significant difference in the cocoon and reeling parameters was observed between all ripe and unripe batches except for summer season. The silkworms collecting together and mounting at a time can be recommended only in summer season and at certain level during rainy season.

Influence of Different Treatment Regimes of Phytoecdysteroid on Silkworm, Bombyx mori L.

  • Kumar S. Nirmal;Nair K. Sashindran;Mondal Sumana
    • International Journal of Industrial Entomology and Biomaterials
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    • v.14 no.1
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    • pp.63-68
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    • 2007
  • The response of silkworm, Bombyx mori L. to phytoecdysteroid (PE) when administered at different ages of $5^{th}$ instar was studied in the popular bivoltine ($CSR2{\times}CSR4$) and multi${\times}$bivoltine ($PM{\times}CSR2$) silkworm hybrids, reared on the Victory-1 variety of mulberry leaves. PE was administered to $5^{th}$ instar silkworm per os at a rate of $250{\mu}g$ per 100 larvae to different batches of silkworm at 0, 24, 48, 72, 96, 120, 144 hrs and at the onset of cocoon spinning when a few larvae were ripe. The larval and mounting duration, cocoon yield and cocoon characters were influenced by PE. The intensity of influence was dependent on the time of application. The larvae treated at the beginning of the instar, improved the economic traits significantly with a marginal increase in larval duration. In the larvae treated at the middle of the instar, larval duration was shortened remarkably but the economic traits were adversely affected. This particular treatment can become a good management strategy in the case of mulberry leaf shortage or disease incidence. In the larvae treated at the onset of cocoon spinning, the mounting duration was substantially reduced without much effect on the cocoon traits which would be a big benefit in commercial sericulture. The physiological significance of varied response of silkworm to PE administration is discussed.

A Research for the pattern of the Instrument Panel Design of passenger cars (승용차 인스트루먼트 패널 디자인 유형의 연구)

  • Koo, Sang
    • Archives of design research
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    • v.12 no.4
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    • pp.99-108
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    • 1999
  • The interior space in a passenger car is consisted with many partial elements, and the instrument panel is the most important part from all of them, which is designate the total image of the interior design and the space variation, drivability and safety of the interior space. ] The instrument panel of a passenger car in the early age had the concept of a wall between the engine room and the passenger cabin on which the instrument for the driver were fitted. Therefore the central mounting of the instruments was the typical feature regardless of the position of a driver seat. As the automobiles became more functional with many equipments, driver oriented instrument panel with energy absorbing materials had been developed, and that was the beginning of the various instrument panel design of these days. The recent instrument panels of passenger car have the tendency of going back to the central instrument mounting as it was at the past on a few cars for the strict safety regulation, a new production technology and for the enhanced drivability. It can be summarized into a few results as these with the analysis of a few recent instrument panels. -minimizing the total volume for the better frontal visibility. -energy absorbing and passive structures for the strict impact regulations. -revival of central instrument mounting for the convenience and safety through minimizing the difference of the focal length of a driver.

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Role of Phytoecdysteroid Treatment Time in the Maturation Process of $Multi{\times}Bivoltine$ ($BL67{\times}CSR101$) Hybrid Silkworm, Bombyx mori L. When Maintained at Low, Medium and High Temperature

  • Kumar S. Nirmal;Nair K. Sashindran;Rabha Jagat
    • International Journal of Industrial Entomology and Biomaterials
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    • v.12 no.2
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    • pp.51-56
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    • 2006
  • Use of products containing phytoecdysteroid (PE) as active principle has become popular in prominent sericultural areas of India for hastening larval maturation events and synchronizing cocoon spinning activities as an obvious advantage is assured. At times, the present recommendation of administering PE at the onset of spinning results in peak labour requirement at odd hrs. To enable making recommendation for the use of PE on $multi{\times}bivoltine$ silkworm hybrids based on the climatic conditions prevailing in different areas especially with regard to temperature, the experiment was taken up to determine proper treatment times so that the induced spinning will be more orderly and the labour can be leveraged more efficiently. Different brackets of low ($18-22^{\circ}C$), medium ($24-28^{\circ}C$) and high ($29-32^{\circ}C$) temperature were simulated during the latter half of V larval instar and cocoon spinning. PE was administered to $multi{\times}bivoltine$ silkworm ($BL67{\times}CSR101$) hybrid batches as per the recommended dose at three different times viz., 10 am, 4 pm and 10 pm. Three replicates of 100 larvae were maintained for each treatment. Absolute controls were also maintained in each temperature range to compare the results. Cumulative maturation percentage was recorded at 6 hrs interval to ascertain peak mounting span. The influence of the treatment on the cocoon traits also was studied. Based on the peak mounting span, it was evident that in low temperature 10 pm treatment would be better. In medium and high temperature, treatment at 4 pm proved to be a better option. The influence of the treatment times at different temperature range on labour management is discussed.

Effect of Top-Mounted ICI on Severe-Accident Mitigation (노내계측계통 상부탑재에 의한 중대사고 대처 영향)

  • Suh, Jungsoo;Kim, Han Gon
    • Transactions of the KSME C: Technology and Education
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    • v.3 no.3
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    • pp.209-215
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    • 2015
  • The effects of the mounting location of ICI cables on severe accident mitigation systems, specially IVR-ERVC (In-Vessel Retention by External Reactor Vessel Cooling) and core catcher (Ex-vessel corium retention and cooling system), are investigated. The effects of bottom-mounted ICI strategy on severe accident mitigation are summarized and advantages of top-mounted ICI to improve severe accident mitigation are also highlighted.

Information Pollution, a Mounting Threat: Internet a Major Causality

  • Pandita, Ramesh
    • Journal of Information Science Theory and Practice
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    • v.2 no.4
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    • pp.49-60
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    • 2014
  • The present discourse lasts around, information pollution, causes and concerns of information pollution, internet as a major causality and how it affects the decision making ability of an individual. As, information producers in the process to not to lose the readership of their content, and to cater the information requirements of both the electronic and the print readers, reproduce almost the whole of the printed information in digital form as well. Abundant literature is also equally produced in electronic format only, thereon, sharing this information on hundreds of social networking sites, like, Facebook, Twitter, Blogs, Flicker, Digg, LinkedIn, etc. without attributions to original authors, have created almost a mess of this whole information produced and disseminated. Accordingly, the study discusses about the sources of information pollution, the aspects of unstructured information along with plagiarism. Towards the end of the paper stress has been laid on information literacy, as how it can prove handy in addressing the issue with some measures, which can help in regulating the behaviour of information producers.

Unified design approach for single- and 3-phase input air conditioning systems using SiC devices

  • Kim, Simon;Balasubramaniasarma, Swaminathan;Ma, Kwokwai;Chung, Daewoong
    • Proceedings of the KIPE Conference
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    • 2020.08a
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    • pp.205-208
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    • 2020
  • This paper examines the approach, enabled by using SiC power devices, to unify the inverter design for central air conditioning (CAC) system for both single- and 3-phase input, and reduce the PFC inductor size to be PCB-mountable. By using SiC-instead of Si-diode in PFC stage, it is possible to increase the switching frequency from 16kHz to 60kHz to reduce the required PFC inductance from 0.93mH to 0.25mH, thus enable PCB-mounting of inductor. With the next step of using 1200V SiC MOSFET instead of Si-IGBT, the DC link voltage can be boosted from 311Vdc to 550Vdc in PFC stage, allowing the inverter and compressor used in 3-phase input CAC be used for single-phase input as well. Furthermore, using SiC MOSFET in inverter stage can further reduce total loss system total loss to 200.8 W. Simulation and experimental results are presented in the paper.

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Validity experiment of dipping method in the manufacture of metal-ceramic substructure (금속 도재 하부구조물 제작 시 침적법의 타당도 실험)

  • Lee, Wan-Sun;Im, Su-Yeon;Kim, Wook-Tae
    • Journal of Dental Rehabilitation and Applied Science
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    • v.31 no.1
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    • pp.26-32
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    • 2015
  • Purpose: The main purpose of this study is to suggest application plan of dipping method by comparing & analysing the difference between addition method and dipping method in the manufacture of metal-ceramic substructure of maxillary central incisor (#1), followed by assessing the work efficiency. Materials and Methods: Master die and hard plaster-copied one were produced and then a total of 20 copies, 10 copies for each through addition method and dipping method, were manufactured and experimented. Copings were fixed on the abutment model and invested in epoxy mounting cup. Samples were cut in labial and lingual direction, using cutter and then rubbed on sandpaper, whose 4 points were measured by using digital microscope. Results: The comparison of mean values by using t-test, parametric statistical method, shows overall significant difference (P < 0.05). Conclusion: The result of this study can be suggested as an application plan, since there is no significant difference between addition method and dipping method in the manufacture of metal-ceramic substructure.