Distributed Approximation of Minimum Routing Cost Trees

We study the NP-hard problem of approximating a Minimum Routing Cost Spanning Tree in the message passing model with limited bandwidth (CONGEST model). In this problem one tries to find a spanning tree of a graph $G$ over $n$ nodes that minimizes the sum of distances between all pairs of nodes. In the considered model every node can transmit a different (but short) message to each of its neighbors in each synchronous round. We provide a randomized $(2+\epsilon)$-approximation with runtime $O(D+\frac{\log n}{\epsilon})$ for unweighted graphs. Here, $D$ is the diameter of $G$. This improves over both, the (expected) approximation factor $O(\log n)$ and the runtime $O(D\log^2 n)$ of the best previously known algorithm. Due to stating our results in a very general way, we also derive an (optimal) runtime of $O(D)$ when considering $O(\log n)$-approximations as done by the best previously known algorithm. In addition we derive a deterministic $2$-approximation

SOILS OF BISWANATH COLLEGE OF AGRICULTURE FARM: SURVEY AND LAND USE PLANNING

Not AvailableSoil is a unique living entity. It has its origins in physical, chemical and biological interactions between the parent materials and the atmosphere. The very existence of mankind depends on this natural resource. This resource has to be guarded against depletion of its individual intrinsic values for sustainable agricultural production. There is a growing realization on the scientific management of soil health both at the national and international level. Scientific management of soil needs location and site specific information pertaining to the nature of soil and other land resources, their constraints, potential and suitability for various crops and other uses. In this context soil survey plays an important role in exploiting the potential soil resources and basic information and principles for their better utilization. It is appreciated that our faculty members of the Department of Soil Science, AAU Jorhat and the Scientist from AICRP(DA), BNCA, AAU Biswanath Chariali have conducted a detailed soil survey of the farm of Biswanath College of Agriculture and prepared a soil survey report covering all the aspects pertaining to scientific management of the land resource. I sincerely hope that the report will provide the desired information on the soils of the area and offer the guidelines to develop better land use planning.Not Availabl

Numerical study of the thermoelectric power factor in ultra-thin Si nanowires

Low dimensional structures have demonstrated improved thermoelectric (TE) performance because of a drastic reduction in their thermal conductivity, {\kappa}l. This has been observed for a variety of materials, even for traditionally poor thermoelectrics such as silicon. Other than the reduction in {\kappa}l, further improvements in the TE figure of merit ZT could potentially originate from the thermoelectric power factor. In this work, we couple the ballistic (Landauer) and diffusive linearized Boltzmann electron transport theory to the atomistic sp3d5s*-spin-orbit-coupled tight-binding (TB) electronic structure model. We calculate the room temperature electrical conductivity, Seebeck coefficient, and power factor of narrow 1D Si nanowires (NWs). We describe the numerical formulation of coupling TB to those transport formalisms, the approximations involved, and explain the differences in the conclusions obtained from each model. We investigate the effects of cross section size, transport orientation and confinement orientation, and the influence of the different scattering mechanisms. We show that such methodology can provide robust results for structures including thousands of atoms in the simulation domain and extending to length scales beyond 10nm, and point towards insightful design directions using the length scale and geometry as a design degree of freedom. We find that the effect of low dimensionality on the thermoelectric power factor of Si NWs can be observed at diameters below ~7nm, and that quantum confinement and different transport orientations offer the possibility for power factor optimization.Comment: 42 pages, 14 figures; Journal of Computational Electronics, 201

Profil białek i izozymów esterazy w nasionach palczatki pogiętej [Cymbopogon flexuosus (Nees ex Steud.) Wats] zebranej w różnych warunkach środowiskowych

Seed protein profile and esterase isoenzme were studied in ten accessions of lemongrass [Cymbopogon flexuosus] collected from northeastern India belonging to two major chemotypes – citral and geraniol rich essential oil. Total four esterase isozyme bands were ob55 Vol. 57 No. 3 2011 Seed protein and esterase isozyme profile among the accession of lemongrass served with Rm values in the range of 0.394 to 0.798. Among them one with Rm value 0.747 was unique as it was consistently present in all the accessions irrespective of citral or geraniol rich chemotype. For seed protein, SDS-PAGE analysis of seven accessions (RLJ-TC-1, RLJ-TC-4, RLJ-TC-5, RLJ-TC-8, RLJ-TC-9, RLJ-TC-10 and OD-19) revealed a total of 13 bands among the accessions ranging in the size from 21.5 to 92.0 kd. Six citral rich accessions exhibits very similar seed protein profile with 10 to 11 protein band each. However, the geraniol rich chemo-type RLJ-TC-8 exhibit different profile with only six high molecular proteins. Four seed proteins with molecular weight 92.0, 86.0, 80.4 and 61.6 kd were consistently found in all the chemotypes irrespective of citral or geraniol rich and can be considered as marker for the species. Although esterase isozymes exhibited low polymorphism, yet close similarity of isozyme and seed protein profile can be considered as evidence of genetic homogeneity among the accession of lemongrass.Badano profil białkowy nasion i izoenzymów esterazy w próbkach palczatki pogiętej [Cymbopogon flexuosus (Nexx ex Steud.) Wats] pochodzących z dziesięciu stanowisk, zebranych w północno-wschodniej części Indii, należących do dwóch głównych chemotypów ze względu na zawartości olejków eterycznych: typu cytralowego i geraniolowego. Współczynnik ruchliwości elektroforetycznej Rm badanych prób wahał się w granicach 0,394– 0,798. Spośród nich współczynnik RM o wartości 0,747 wyróżniał się wśród pozostałych i występował na wszystkich analizowanych stanowiskach niezależnie od charakteru chemotypu. Rozdział elektroforetyczny SDS-PAGE profilu białkowego nasion roślin pochodzących z siedmiu stanowisk (RLJ-TC-1, RLJ-TC-4, RLJ-TC-5, RLJ-TC-8, RLJ-TC-9, RLJ-TC-10 i OD+19) charakteryzował specyficzny układ 13 prążków w zakresie wielkości od 21,5 do 92 kD. U roślin należących do chemotypu cytralowego (6 osobników) stwierdzono podobny układ 10–11 prążków. Jednakże w chemotypie bogatym w geraniol RLJ-TC-8 stwierdzono odmienny profil odpowiadający sześciu wysokocząsteczkowym białkom. W przypadku wszystkich badanych chemotypów obserwowano powtarzający się układ 4 prążków dla białek o wielkościach odpowiednio: 92,0, 86,0, 80,4, 61,6 kd, co pozwala uznać go za marker charakterystyczny dla badanych roślin. Pomimo występowania niskiego stopnia polimorfizmu izoenzymów esterazy, przy jednoczesnej wysokiej zgodności pomiędzy wynikami rozdziału elektroforetycznego izoenzymów i profilu białkowego nasion, można wnioskować o genetycznej homogenności badanych stanowisk palczatki pogiętej

Not Available

Not AvailableABSTRACT Basal stem rot disease caused by the fungus, Ganoderma lucidum (Curtis Ex. Fr.) Karst, is the most dreaded disease of arecanut in Assam. The experiment was carried out to test the antifungal activity of aqueous extract of thirty locally available plant species against the test fungus. Pure culture of Ganoderma sp. was isolated from fruiting body of infected arecanut palm. Among the plant species tested, Allium sativum corm extract exerted maximum inhibition with 90.89, 100 and 100 per cent inhibition over control at 5, 10 and 20 per cent conc. respectively, followed by extract of Solanum nigrum with 77.00. 84.11 and 100 per cent inhibition over control at 5, 10 and 20 per cent conc. respectively after 144h of incubation. Leaf extract of Clerodendron infortunatum, Bidens pilosa, Leucas aspera, Spilanthes paniculata, Lawsonia inermis and Cinnamomum verum showed strong inhibitory effect 83.88, 79.22, 77.22, 76.11 and 72.78 per cent inhibition over control respectively.Not Availabl

Utilization Of IEC By Middle Level Health Personnel In The Implementation Of National Nutrition Programmes

Research question: Extent of utilization of the information, Education and Communication (IEC) components in the implementation of national nutrition programmes by middle level health personnel. Objectives: (i) To assess the knowledge of paramedics with regard to nutrition concepts and programmes and also (ii) to find out the current level of utilization of IEC inputs in the delivery of nutrition programmes. Study design: Cross- sectional, questionnaire survey. Setting: Regional Training Centres for Male and Female Health Workers located in the State of Andha Pradesh, India. Sample size: A total of 211 in â€" service trainees. Participants: Multipurpose Health Assistants (Male an Female), Multipurpose Health Supervisor (Male and Female) and Multipurpose Health Extension Officers. Study Variables: Socio- economic, health enhancing lifestyles, nutrition knowledge, mass media and small media utilization. Statistical analysis : Percent frequencies and mean scores with standard deviation, correlations. Results: Middle level health personnel scored well in nutrition knowledge. But their utilization of IEC tools in programme implementation and community education was not satisfactory. Use of print and broadcast media to update their nutrition knowledge was poor. A significant correlation was observed among variables like nutrition knowledge, mass media and small media utilization

Low cost Vermicompost Production

Not AvailableLow cost vermicompost productionNot Availabl