2,548 research outputs found

    Proposed New Antiproton Experiments at Fermilab

    Full text link
    Fermilab operates the world's most intense source of antiprotons. Recently various experiments have been proposed that can use those antiprotons either parasitically during Tevatron Collider running or after the Tevatron Collider finishes in about 2010. We discuss the physics goals and prospects of the proposed experiments.Comment: 6 pages, 2 figures, to appear in Proceedings of IXth International Conference on Low Energy Antiproton Physics (LEAP'08), Vienna, Austria, September 16 to 19, 200

    Production Performance of Indigenous Chicken under Semi Intensive Management Conditions in Central Tanzania

    Get PDF
    A study to evaluate four indigenous chicken – namely: Horasi, Kuchi, Naked neck and Frizzled in order to obtain grand-parent and parent stocks was carried out at Tanzania Livestock Research Institute, Mpwapwa district of Dodoma, Tanzania. The perfomance of the ecotypes were compared so as to come out with the best indigenous chicken among the four. A total of 548 indigenous chicken including Horasi (162), Kuchi (253), Naked neck (81) and Frizzled (52) were used in the study. All chicken were treated equally in terms of management under semi intensive system. Data were collected on body weight, external egg characteristics, day old chick weight, body weight gain, weight at 4, 8, 12, 16, 20, 24 weeks of age for each ecotype. Age at first egg and egg number were also determined. The collected data was analysed using General Linear Model of SAS (2006). The results showed that there were significant differences in mature body and egg weight between the ecotypes. The mature body weight and egg weight respectively were 2075g, 2070g, 1792g , 1622g and 44.73g, 45.94g, 38.28g, 38.08g for Horasi, Kuchi, Naked neck and Frizzled respectively. Day old chick weight were 34.26g, 36.26g, 31.99g and 29.02g for Horasi, Kuchi, Naked neck and Frizzled respectively. Average growth rate per day in grams for Horasi and Kuchi was 3.67g and 3.96g per day from day old chick to week 4 and 6.83g and 8.25g per day from week 5 to week 8, respectively. Average egg numbers per clutch for Horasi and Naked neck were 16 and 18 eggs respectively. Average body weight at week 24 for naked neck and Horasi (F1) were 1427g and 1572.8g respectively. Average ages at first egg for Horasi and Naked neck (F1) were found to be 15 weeks and 16 weeks, respectively. The study reveals that, Horasi and Naked neck ecotypes under semi intensive system perform better than Frizzed. It was conclude that, Horasi and Naked neck can be used at farm level for egg production and Kuchi could be used to improve meat production on other indigenous chicken hence increase income of smallholder farmers

    Duality Invariant M-theory: Gauged supergravities and Scherk-Schwarz reductions

    Full text link
    We consider the reduction of the duality invariant approach to M-theory by a U-duality group valued Scherk-Schwarz twist. The result is to produce potentials for gauged supergravities that are normally associated with non-geometric compactifications. The local symmetry reduces to gauge transformations with the gaugings exactly matching those of the embedding tensor approach to gauged supergravity. Importantly, this approach now includes a nontrivial dependence of the fields on the extra coordinates of the extended space.Comment: 22 pages Latex; v2: typos corrected and references adde

    PEMANFAATAN RADIO FREQUENCY IDENTIFICATION (RFID) UNTUK PEMANTAUAN KEBERADAAN KARYAWAN (Studi Kasus: Program Studi Teknik Informatika Universitas Pasundan)

    Get PDF
    Pemantauan dan pengendalian kedisiplinan karyawan merupakan hal yang penting untuk memastikan karyawan hadir dan bekerja di tempat kerja selama jam kerja untuk meningkatkan produktifitas lingkungan kerja. Pemantauan karyawan sangat bermanfaat untuk orang yang memiliki kepentingan dengan karyawan tersebut, karena dapat mempermudah dalam mengetaui lokasi karyawan secara akurat selama jam kerja. Pemantauan keberadaan lokasi karyawan di butuhkan untuk membantu mengetaui lokasi karyawan tersebut berada untuk mempermudah dalam menemui karyawan. Untuk itu perlu sistem untuk mengawasi karyawan dengan efektif. Namun, teknologi yang saat ini di gunakan berupa fingerprint kurang efektif karena sistem tersebut hanya mampu mencegah pemalsuan presensi saja namun tidak menjamin karyawan tersebut berada tempat kerja selama jam kerja. Bisa saja karyawan keluar dari tempat kerja tanpa terdeteksi dan kembali ke tempat kerja saat jam pulang kantor, sehingga data yang tersimpan hanya data pegawai masuk dan keluar dari tempat kerja. Penelitian ini dilakukan untuk membantu Mahasiswa dan pihak yang berkepentingan untuk mengetahui lokasi dimana karyawan tersebut berada dengan memanfaatkan Radio Frequency Identification (RFID) sebagai alat untuk pemantauan keberadaan karyawan di program studi Teknik Informatika Universitas Pasundan Bandung. Pemanfaatan RFID di pilih karena menggunakan metode identifikasi objek maupun orang dengan menggunakan sarana tag dan reader untuk menyimpan dan menerima data tanpa membutuhkan kontak secara langsung. Tag digunakan sebagai kartu tanda pengenal karyawan dan reader ditempatkan di tiap lorong atau titik tertentu. Sehingga dengan sistem karyawan dapat terpantau secara langsung karena tag mengirim terus menerus ke reader sehingga keberadaan karyawan dapat diketahui lokasinya. Hasil akhir dari penelitian ini adalah sebuah rencana Pemanfaatan RFID untuk pemantauan keberadaan Karyawan di program studi Teknik Informatika, yang nantinya hasil pemantauan akan dapat di lihat pada media Informasi Fakultas Teknik. Kata kunci : Radio Frequency Identification, Reader, Tag, Pemantauan, teknik Informatika, Karyawa

    Boundary Conditions for Interacting Membranes

    Get PDF
    We investigate supersymmetric boundary conditions in both the Bagger-Lambert and the ABJM theories of interacting membranes. We find boundary conditions associated to the fivebrane, the ninebrane and the M-theory wave. For the ABJM theory we are able to understand the enhancement of supersymmetry to produce the (4,4) supersymmetry of the self-dual string. We also include supersymmetric boundary conditions on the gauge fields that cancel the classical gauge anomaly of the Chern-Simons terms.Comment: 36 pages, latex, v2 minor typos correcte

    The Open-Source Neuroimaging Research Enterprise

    Get PDF
    While brain imaging in the clinical setting is largely a practice of looking at images, research neuroimaging is a quantitative and integrative enterprise. Images are run through complex batteries of processing and analysis routines to generate numeric measures of brain characteristics. Other measures potentially related to brain function – demographics, genetics, behavioral tests, neuropsychological tests – are key components of most research studies. The canonical scanner – PACS – viewing station axis used in clinical practice is therefore inadequate for supporting neuroimaging research. Here, we model the neuroimaging research enterprise as a workflow. The principal components of the workflow include data acquisition, data archiving, data processing and analysis, and data utilization. We also describe a set of open-source applications to support each step of the workflow and the transitions between these steps. These applications include DIGITAL IMAGING AND COMMUNICATIONS IN MEDICINE viewing and storage tools, the EXTENSIBLE NEUROIMAGING ARCHIVE TOOLKIT data archiving and exploration platform, and an engine for running processing/analysis pipelines. The overall picture presented is aimed to motivate open-source developers to identify key integration and communication points for interoperating with complimentary applications

    Computability of ordinary differential equations

    Get PDF
    In this paper we provide a brief review of several results about the computability of initial-value problems (IVPs) defined with ordinary differential equations (ODEs). We will consider a variety of settings and analyze how the computability of the IVP will be affected. Computational complexity results will also be presented, as well as computable versions of some classical theorems about the asymptotic behavior of ODEs.info:eu-repo/semantics/publishedVersio

    Efficient noninteractive certification of RSA moduli and beyond

    Get PDF
    In many applications, it is important to verify that an RSA public key (N; e) speci es a permutation over the entire space ZN, in order to prevent attacks due to adversarially-generated public keys. We design and implement a simple and e cient noninteractive zero-knowledge protocol (in the random oracle model) for this task. Applications concerned about adversarial key generation can just append our proof to the RSA public key without any other modi cations to existing code or cryptographic libraries. Users need only perform a one-time veri cation of the proof to ensure that raising to the power e is a permutation of the integers modulo N. For typical parameter settings, the proof consists of nine integers modulo N; generating the proof and verifying it both require about nine modular exponentiations. We extend our results beyond RSA keys and also provide e cient noninteractive zero- knowledge proofs for other properties of N, which can be used to certify that N is suitable for the Paillier cryptosystem, is a product of two primes, or is a Blum integer. As compared to the recent work of Auerbach and Poettering (PKC 2018), who provide two-message protocols for similar languages, our protocols are more e cient and do not require interaction, which enables a broader class of applications.https://eprint.iacr.org/2018/057First author draf

    EVALUASI PENJADWALAN GALIAN C (PERTAMBANGAN PASIR) MENGGUNAKAN METODE (CPM DAN PERT) (Study Kasus Di PT. Graha Silver Silk)

    Get PDF
    Objek pada penelitian ini adalah perencanaan proyek, maka untuk melakukan perencanaan proyek dibutuhkan data-data awal sebagai input dalam pembuatan perencanaan waktu atau jadwal, untuk memperkirakan biaya suatu pekerjaan, perusahaan ini menggunakan analisa data pengalaman dari pekerjaan-pekerjaan proyek sebelumnya, dari perusahaan tersebut analisa ini merupakan panduan biaya. Sedangkan CPM dan PERT digunakan untuk mennunjukan hubungan antara kegiatan dan kapan kegiatan itu dilakukan, CPM dan PERT ini sangat cocok dengan kondisi proyek yang sedang diteliti karena terdapat hubungan pekerjaan yang tumpang tindih dengan kata lain pekerjaan B dimulai tanpa harus menunggu Pekerjaan A selesai. Upaya yang dilakukan untuk menyelesaikan persoalan dalam proyek ini (overallocation) yaitu dengan cara leveling pada Microsoft project 2013, leveling dilakukan dengan cara menyusun ulang jadwal kerja setiap kegiatan atau dengan cara menggeser jadwal beberapa pekerjaan dan penundaan waktu pelaksanaan hingga setiap pekerjaan tidak ada sumber daya yang overallocation. Seperti yang dilakukan pada evaluasi penjadwalan proyek ini yaitu: Mandor terjadi overallocation pada tanggal (15/05/2018 – 18/05/2018) pekerjaan pengerukan menggunakan bucket wheel, pada tanggal (19/05/2019 – 18/06/2018) pekerjaan pembuatan dinding kobakan kolam, pada tanggal (18/05/2018 – 22/06/2018) pekerjaan perakitan mesin penambang (Crusher), pada tanggal (28/05/2018 – 13/07/2018) pekerjaan penyortiran pasir dan tanah (23/05/2018 – 31/07/2018) pekerjaan pengolahan bahan galian, pada tanggal (06/10/2018 – 12/10/2018) pekerjaan penggurukan area pertambangan, pada tanggal (13/10/2018 – 20/10/2018) pekerjaan pembersihan lokasi. Kata kunci: Microsoft Project 2013, levelling, Presedence (CPM dan PERT
    • …
    corecore