878 research outputs found

    Lifting fixed points of completely positive semigroups

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    Let {ϕs}sS\{\phi_s\}_{s\in S} be a commutative semigroup of completely positive, contractive, and weak*-continuous linear maps acting on a von Neumann algebra NN. Assume there exists a semigroup {αs}sS\{\alpha_s\}_{s\in S} of weak*-continuous *-endomorphisms of some larger von Neumann algebra MNM\supset N and a projection pMp\in M with N=pMpN=pMp such that αs(1p)1p\alpha_s(1-p)\le 1-p for every sSs\in S and ϕs(y)=pαs(y)p\phi_s(y)=p\alpha_s(y)p for all yNy\in N. If infsSαs(1p)=0\inf_{s\in S}\alpha_s(1-p)=0 then we show that the map E:MNE:M\to N defined by E(x)=pxpE(x)=pxp for xMx\in M induces a complete isometry between the fixed point spaces of {αs}sS\{\alpha_s\}_{s\in S} and {ϕs}sS\{\phi_s\}_{s\in S}.Comment: 4 pages, a new theorem is added, showing that part 3 of Theorem 1 holds for any commutative semigrou

    Characteristics of feeding and breeding practices for intensification of smallholder dairy systems in the Kenya highlands

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    This study aimed at better understanding of the characteristics of feeding and breeding practices smallholder farmers adopt in intensifying their dairy production. Use of hired labour for fodder gathering, growing of fodder crops and purchase of feeds increased with increasing intensification, but Bos taurus breeds did not respond to increasing feeding intensification while Bos indicus cattle responded, calving at earlier age and yielding more milk. Overall, first calving occurred at 32 months, but days open prolonged to 250 days with milk yield of 4 litres per day of calving interval. A principal component analysis extracted six feeding and breeding components, explaining 71.79% of the total variations in feeding and breeding practices for dairy intensification. The six components were labelled: non- intensified feeding and breeding; breeding decisions based-intensification; high external resource based-intensification; moderate resource based-intensification; resource poor based-intensification; and moderate external resource based-intensification. These characteristics points to some `evolutionary process¿ of intensification involving feeding and breeding decisions, depending on the risk-bearing capacity of the household. Intensification enhancing interventions for smallholders need be considered in the context of the household economy. Interventions on feeding and breeding have to be packaged together holistically if intensification is to enhance productivity. A selective intervention on only one of these is associated with low productivity levels, only contributing to sustaining family subsistence livelihood

    PERKEMBANG EKONOMI NASIONAL DALAM INDONESIA

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    Penelitian mempelajari untuk pengaruh perkembangan ekonomi secara nasional di indonesiaa pada periode 2014-2019 Data yang digunakan dalam penelitian ini adalah data sesunguh nya yaitu dari sampel dari melakukan uji pengambilan di masyarakat untuk melihat perkebangan ekonomi yang berkaitan dengan kurang nya pemodalan baik jumlah maupun sumbernya dan kurang nya keterampilan untuk mencba peluang bisnis dalam kehidupan masyarakat dan terbatas untuk pemasaran adanya terbatasnya ekonomi sehingga mengakibatkan keadaan lingkup usaha menjadi sempit atau terbatas membuat keadaan kawatir dalam ini dilandasi bahwa wilayah Indonesia akan menghadapi pangsa pasar bebas ketiaka itu terlaksanakan tuntutannya harus mampu bersaing namun mendapatkan suatu permasalah tetapi bisa terselesaikan dengan beberapa kebijakan yang akan membuka peluang bagi untuk mengakses Industri dengan mudah Sebab ini pertumbuhan yang akan diluncurkan dari sektor perbankan Ini menujukan permasalah yang bersumber dari permodalan dapat diselesaikan dengan mudah terselesaikan dan mencari pengelolahan sumber modal berimbas kepada pengelolaan modal dan produk yang dihasilkan akan lebih stabil dan inofati

    Cell Death Effects Of Garcinia Atroviridis Extracts On Dbtrg-05mg And U-87mg Human Brain Cancer Cell Lines

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    Tujuan kajian ini adalah untuk mengkaji kesan-kesan kematian sel yang diaruh oleh ekstrak minyak pati daripada daun (EO-L) dan kulit kayu pokok (EO-B) G. atroviridis terhadap sel-sel kanser otak manusia DBTRG-05MG dan U-87 MG The aim of this study was to investigate the cell death effects of the essential oils extracted from the leaf (EO-L) and stem bark (EO-B) of G. atroviridis on DBTRG-05MG and U-87 MG human brain cancer cell

    ENVIRONMENTAL RISK IN ROMANIAN VINEYARDS

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    Agricultural activity, unlike other economic areas, is accompanied by a high degree of risk and uncertainty, caused mainly by environmental factors. The influence of weather on growth and developing processes of crops, orchards and vineyards is the science which studies and determines agricultural biotope necessary to achieve optimal biological productivity. Thus, agro meteorology involves agro-climatic resources’ management and conservation in developing agricultural production process (weather - deepening relationship). Agriculture, as user of agro meteorological information, recover their combination with specialized information (agricultural, technological, economic, etc.) for preventing and minimizing climatic risk upon plant species, but also for establishing sustainable development strategies. In order to prevent and reduce the negative impact on wine production, it is necessary to monitor weather forecasts and hazardous to achieve decision-making system of protection and assurance wine production.natural hazards, traceability, agro meteorological monitoring, risk management.

    Disposal and replacement practices in Kenya’s smallholder dairy herds

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    The objectives of this study were to explore the possibilities for improving the breeding practices and developing policies in support of smallholder dairy producers in the central highlands of Kenya through analysing current disposal and replacement practices. Data were obtained from a cross-sectional characterization study. This began with a pilot survey in one district where 365 households were randomly sampled and then extended to another eight districts where 1390 households were randomly sampled. The pooled data from the nine districts comprised 987 dairy households with information on dairy cattle disposal and replacement practices during the previous year and the primary reasons for animal deaths and sales. Complementary information on the origins of cows was collected through targeted surveys of 50 sample households representative of the major dairy systems. Based on farmer recall of events during the year preceding the surveys, almost a third of cow and heifer exits were driven by the households’ needs for cash, and another third resulted from losses caused by diseases. Poor performance was less important, accounting for about 10% of cow exits and about 5% for heifers. More cows (>25% y-1) left the herd in zero- and semi-zero grazing systems than from free-grazing herds (19% y-1) and fewer heifers were available as replacements. As a result, the herds in the more intensive grazing systems would have to purchase replacements to maintain their herd size. By contrast, there were surplus heifer replacements in the free grazing systems. The majority of the breeding cows were born within the herd (68%) and few were purchased: 25% from smallholdings and 7% from large-scale farms. Of the purchased cows, 90% originated from smallholdings and 10% from large-scale farms while 96% of heifers were purchased from smallholdings and only 4% from large-scale farms. Purchases from smallholder farms were from within the locality. The implications of these results for smallholder dairy production in Kenya are discussed

    A Complete Survey of the Central Molecular Zone in NH3

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    We present a map of the major part of the central molecular zone (CMZ) of simultaneous observations in the NH3 (J,K) = (1,1) and (2,2) lines using the Kagoshima 6-m telescope. The mapped area is -1.000 < l < 1.625 deg, -0.375 < b < +0.250 deg. The kinetic temperatures derived from the (2,2) to (1,1) intensity ratios are 20--80 K or exceed 80 K. The gases corresponding to temperature of 20--80 K and > 80 K contain 75% and 25% of the total NH3 flux, respectively. These temperatures indicate that the dense molecular gas in the CMZ is dominated by gas that is warmer than the majority of the dust present there. A comparison with the CO survey by Sawada et al. (2001) shows that the NH3 emitting region is surrounded by a high pressure region on the l-v plane. Although NH3 emission traces dense gas, it is not extended into a high pressure region. Therefore, the high pressure region is less dense and has to be hotter. This indicates that the molecular cloud complex in the Galactic center region has a ``core'' of dense and warm clouds which are traced by the NH3 emission, and an ``envelope'' of less dense and hotter gas clouds. Besides heating by ambipolar diffusion, the hot plasma gas emitting the X-ray emission may heat the hot ``envelope''.Comment: 21 pages, 14 figures, accepted for PAS
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