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이상섭(Sang-Sud Lee),유성연(Seng-Yeon yOO),김병채(Byeong-Chae Kim),김은기(Eun-Kee Kim),임덕재(Duck-Jae Lim),정장규(Chang-Kyu Chung),김석벙(Seoung-Beom Kim) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
Naphthalene sublimation technique is used to investing the average and local heat transfer from the circular rod, and to determine the average and local heat transfer from the circular rod with and without squarc wing type mixing vane in axial flow. The experiments are performed for a circular rod and flat plate with and without mixing vane in wind tunnel. In comparison with flat plate and circular rod in axial flow, averaged Nusselts namber is increased 2 times as the increase of Reynolds namber with mixing vane. Longitudinal vortex induced by square wing type has the stronger vortex strength. so square wing type vortex generator shows an effect in downstream.
Modeling the influences of aerosols on pre-monsoon circulation and rainfall over Southeast Asia
Lee, D.,Sud, Y. C.,Oreopoulos, L.,Kim, K.-M.,Lau, W. K.,Kang, I.-S. Copernicus GmbH 2014 Atmospheric Chemistry and Physics Vol.14 No.13
<P>Abstract. We conduct several sets of simulations with a version of NASA's Goddard Earth Observing System, version 5, (GEOS-5) Atmospheric Global Climate Model (AGCM) equipped with a two-moment cloud microphysical scheme to understand the role of biomass burning aerosol (BBA) emissions in Southeast Asia (SEA) in the pre-monsoon period of February-May. Our experiments are designed so that both direct and indirect aerosol effects can be evaluated. For climatologically prescribed monthly sea surface temperatures, we conduct sets of model integrations with and without biomass burning emissions in the area of peak burning activity, and with direct aerosol radiative effects either active or inactive. Taking appropriate differences between AGCM experiment sets, we find that BBA affects liquid clouds in statistically significantly ways, increasing cloud droplet number concentrations, decreasing droplet effective radii (i.e., a classic aerosol indirect effect), and locally suppressing precipitation due to a deceleration of the autoconversion process, with the latter effect apparently also leading to cloud condensate increases. Geographical re-arrangements of precipitation patterns, with precipitation increases downwind of aerosol sources are also seen, most likely because of advection of weakly precipitating cloud fields. Somewhat unexpectedly, the change in cloud radiative effect (cloud forcing) at surface is in the direction of lesser cooling because of decreases in cloud fraction. Overall, however, because of direct radiative effect contributions, aerosols exert a net negative forcing at both the top of the atmosphere and, perhaps most importantly, the surface, where decreased evaporation triggers feedbacks that further reduce precipitation. Invoking the approximation that direct and indirect aerosol effects are additive, we estimate that the overall precipitation reduction is about 40% due to the direct effects of absorbing aerosols, which stabilize the atmosphere and reduce surface latent heat fluxes via cooler land surface temperatures. Further refinements of our two-moment cloud microphysics scheme are needed for a more complete examination of the role of aerosol-convection interactions in the seasonal development of the SEA monsoon. </P>
SUCCESSIVE INDUCTION OF LACTATION IN CATTLE
Dabas, Y.P.S.,Sud, S.C. Asian Australasian Association of Animal Productio 1989 Animal Bioscience Vol.2 No.4
Five multiparous and four nulliparous cross-bred cows were administered s/c with oestradiol-$17{\beta}$ and progesterone 0.1 mg and 0.25 mg/kg. b.w./day for 7 days and 2 mg s/c twice daily of reserpine on days 9 to 12. Lactation was successfully induced in all animals for periods from 258 to 476 days. All animals were dried off for a minimum of 2 months. Subsequently, they were injected s/c with oestradiol valerate and hydroxyprogesterone caproate at 0.1 mg and 0.25 mg/kg. b.w./day on days 1 to 3 and 2 mg twice daily of reserpine on days 8 to 11. Lactation was successfully reinduced in all the cows for a period varying from 228 to 426 days.
Kaur, Paramjeet,Bansal, Priti,Sud, Dhiraj Korean Chemical Society 2013 대한화학회지 Vol.57 No.3
The present paper focuses on the synthesis, characterization and application of nanophotocatalyst for degradation of quinalphos and monocrotophos. Novel heterostructured ZnO/$TiO_2$ photocatalyst ($Z_9T$) was prepared and characterized with X-ray diffraction (XRD), SEM and UV-vis diffuses reflectance spectroscopy. The average crystalline size of synthesized $Z_9T$ was found to be 21.48 nm. The pesticides were degraded in the presence of nanophotocatalysts i.e., $TiO_2$, ZnO, $TiO_2$/ZnO mixed in various proportions and heterostructured nanophotocatalyst synthesized by Sol-Gel method. The batch experiments were performed by adding photocatalyst to 100 ml of pesticide solution and suspension was subjected to irradiation under UV light. In case of mixed catalyst, the maximum degradation of monocrotophos and quinalphos has been observed when ZnO and $TiO_2$ were in the ratio of 7:3 and 8:2 respectively. The degradation efficiency with synthesized heterostructured nanophotocatalyst ($Z_9T$) was found to be comparable with $TiO_2$.
A NOTE ON THREE-DAY STEROID THERAPY FOR INDUCTION OF LACTATION IN INFERTILE HEIFERS
Dabas, Y.P.S.,Sud, S.C. Asian Australasian Association of Animal Productio 1989 Animal Bioscience Vol.2 No.4
Estradiol-$17{\beta}$ and progesterone at the rate of 0.1 and 0.25 mg respectively, per kg body weight per day were administered s/c to each of the five infertile feifers for 3 consecutive days i.e. days 1 to 3, and 2 mg of reserpine were followed twice daily on days 8 to 11. Results indicated that three of the treated heifers were successfully induced into lactation. Progesterone concentrations in the blood plasma and defatted milk exhibited considerable variations.
TRIALS OF GONADOTROPIN TO REGRESS OVARIAN CYSTS PROVOKED BY HORMONAL INDUCTION OF LACTATION
Dabas, Y.P.S.,Sud, S.C. Asian Australasian Association of Animal Productio 1992 Animal Bioscience Vol.5 No.2
Successful induction of lactation in 5 nulliparous repeat breeding cows was achieved by administering diethyl stillboestrol (0.1 mg/kg B.W.) and hydroxyprogesterone caproate (0.25 mg/kg B.W.) for 3 days followed by reserpine (4 mg/day) for 4 days, and dexamethasone (16 mg/day) for one day. The treatment caused cystic ovarian condition in all the animals. Intravaginally progesteronesoaked sponges suppressed but did not eliminate the behavioural estrus. Administration of LHRH ($300{\mu}g$) regressed the cysts in all animals in the first instance but the cysts reappeared in 2 animals. One animal became pregnant and delivered a normal calf.
TREATMENT OF CYSTIC OVARIAN DISEASE IN COWS WITH GONADOTROPINS
Dabas, Y.P.S.,Atheya, U.K.,Sud, S.C.,Lakchaura, B.D. Asian Australasian Association of Animal Productio 1989 Animal Bioscience Vol.2 No.1
Eighteen multiparous and 8 nulliparous cows with cystic ovarian disease (19 having follicular cysts, 7 with luteal cysts) were administered either 3000 I. U. HCG or $300{\mu}g$ LHRH. Ten animals responded satisfactorily leading to normal estrus within a period of 15 to 30 days and subsequent conception. In 8 animals cysts recurred and no effect of treatment was observed in 3 patients. Plasma progesterone concentration was significantly lower in animals having follicular cysts compared to those with luteal cysts.