3,880 research outputs found

    On the expected diameter, width, and complexity of a stochastic convex-hull

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    We investigate several computational problems related to the stochastic convex hull (SCH). Given a stochastic dataset consisting of nn points in Rd\mathbb{R}^d each of which has an existence probability, a SCH refers to the convex hull of a realization of the dataset, i.e., a random sample including each point with its existence probability. We are interested in computing certain expected statistics of a SCH, including diameter, width, and combinatorial complexity. For diameter, we establish the first deterministic 1.633-approximation algorithm with a time complexity polynomial in both nn and dd. For width, two approximation algorithms are provided: a deterministic O(1)O(1)-approximation running in O(nd+1logn)O(n^{d+1} \log n) time, and a fully polynomial-time randomized approximation scheme (FPRAS). For combinatorial complexity, we propose an exact O(nd)O(n^d)-time algorithm. Our solutions exploit many geometric insights in Euclidean space, some of which might be of independent interest

    Pengaruh Faktor-Faktor Ekuitas Merek Sepeda Motor Yamaha terhadap Keputusan Pembelian Masyarakat Kecamatan Indra Makmu Aceh Timur

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    Penelitian ini dilakukan dengan tujuan untuk mengetahui pengaruh ekuitas merek yang terdiri dari kesadaran merek, kesan kualitas, loyalitas merek dan asosiasi merek terhadap keputusan pembelian pada masyarakat Kecamatan Indra Makmu Aceh Timur. Penelitian ini menggunakan data primer yang diperoleh dari kuesioner yang diberikan kepada 96 orang sampel. Data kemudian di analisis dengan menggunakan persamaan regresi linier berganda, uji statistik dan koefisien determinasi. Hasil diperoleh KP= 1,073+0,358Km+0,280Kk+0,324Am+0,207Lm. Pada variabel kesan kualitas, t hitung > t tabel (2,646>1,986). Pada variabel Loyalitas merek t hitung > t tabel (2,732>1,986). Pada variabel asosiasi merek t hitung > t tabel (2,125>1,986) dengan demikian secara parsial dapat dinyatakan kesadaran merek, kesan kualitas, loyalitas merek dan asosiasi merek berpengaruh positif dan signifikan terhadap keputusan pembelian sepeda motor Yamaha di Kecamatan Indra makmu Aceh Timur.Hipotesis yang menyatakan kesadaran merek, kesan kualitas, loyalitas merek dan asosiasi merek berpengaruh secara simultan terhadap keputusan pembelian sepeda motor Yamaha di Kecamatan Indra Makmu Aceh Timur, dapat diterima yang dapat dibuktikan dengan uji F diperoleh  F hitung > F tabel (22,351>2,70) sehingga dapat dinyatakan secara simultan atau bersama-sama kesadaran merek, kesan kualitas, loyalitas merek dan asosiasi merek berpengaruh positif dan signifikan terhadap keputusan pembelian sepeda motor Yamaha di Kecamatan Indra Makmu Aceh Timur.R Square sebesar 0,496 berarti 49,6% variabel Keputusan Pembelian dapat dijelaskan oleh kesadaran merek, kesan kualitas, loyalitas merek dan asosiasi merek

    Penggunaan Metode Inkuiri pada Mata Kuliah Statistik Ekonomi dalam Meningkatkan Hasil Belajar Mahasiswa Prodi Manajemen Fakultas Ekonomi Universitas Samudra

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    Metode pembelajaran adalah siasat dosen dalam mengefektifkan, mengefisienkan serta mengoptimalkan fungsi dan interaksi antara mahasiswa dengan komponen pembelajaran dalam suatu kegiatan peembelajaran untuk mencapa tujuan pembelajaran untuk mencapai tujuan pengajaran. Jumlah sampel yang digunakan adalah sebanyak 43 orang yang merupakan mahasiswa tingkat II EKM A Prodi Manajemen Fakultas Ekonomi Universitas Samudra Tahun Akademik 2016/2017. Metode analisis data dengan menggunakan PTK (Penelitian Tindakan Kelas). Berdasarkan hasil penelitian dan pembahasan dari 43 mahasiswa mata kuliah Statistik Ekonomi terdapat 15 mahasiswa memperoleh nilai diatas 85 (34,8%) dan 13 mahasiswa mamperoleh nilai diatas 70 (30,2%). Secara umum nilai rata-rata kelulusan adalah B (75,81) sebesar 65%

    Clinical submission of supernumerary head of adducter brevis muscle

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    Adductor brevis is an important member of the adductor family occupying the medial compartment of the thigh executing the function of adduction and medial rotation. Deviations from normal anatomy are unusual and rarely reported. A survey of anatomical archives revealed occasional mention of additional bellies of adductor brevis muscle. The present study reports a double belly of adductor brevis muscle (AB) found during a cadaveric dissection class for medical students. The left sided AB displayed two bellies disposed in the same plane. This case report attempts to present the clinical applications of supernumerary bellies of this important adductor muscle of the thigh. It is feasible to categorize these muscular variations upon specialized radiological procedures such as CT and MRI scans only if the radiologist possesses satisfactory understanding of variant anatomy of this region. It is thereafter inferred that upon recognition these muscles present a fair chance of being of utilitised in reconstructions. A biomechanical overview of the present anomaly is also attempte

    Pengaruh Citra Merek, Harga, dan Kualitas Produk terhadap Keputusan Pembelian Handphone Merek Xiaomi di Kota Langsa

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    Tujuan penelitian ini yaitu untuk mengetahui pengaruh citra merek, harga, dan kualitas produk terhadap keputusan pembelian handphone merek Xiaomi di Kota Langsa. Dari analisis data diperoleh persamaan regresi yaitu KP = 3,127 + 0,189 CM + 0,024 H + 0,250 KPr. Dari uji t dapat dijelaskan bahwa citra merek, harga, dan kualitas produk secara parsial berpengaruh signifikan terhadap keputusan pembelian handphone Xiaomi di Kota Langsa dimana masing- masing variabel bebas (citra merek, harga, dan kualitas produk) memiliki nilai t sig < 0,05. Dari uji F dapat dijelaskan bahwa citra merek, harga, dan kualitas produk secara simultan berpengaruh signifikan terhadap keputusan pembelian handphone Xiaomi di Kota Langsa dimana nilai F sig. sebesar 0,042 < 0,05. Dari analisis koefisien determinasi dapat dijelaskan bahwa citra merek, harga, dan kualitas produk mempengaruhi keputusan pembelian handphone Xiaomi di Kota Langsa sebesar 30,4%, sedangkan sisanya 69,6% dipengaruhi oleh variabel lain di luar model penelitian ini

    Preferences for Prenatal Tests for Cystic Fibrosis: A Discrete Choice Experiment to Compare the Views of Adult Patients, Carriers of Cystic Fibrosis and Health Professionals

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    As new technologies enable the development of non-invasive prenatal diagnosis (NIPD) for cystic fibrosis (CF), research examining stakeholder views is essential for the preparation of implementation strategies. Here, we compare the views of potential service users with those of health professionals who provide counselling for prenatal tests. A questionnaire incorporating a discrete choice experiment examined preferences for key attributes of NIPD and explored views on NIPD for CF. Adult patients (n = 92) and carriers of CF (n = 50) were recruited from one children’s and one adult NHS specialist CF centre. Health professionals (n = 70) were recruited via an e-mail invitation to relevant professional bodies. The key attribute affecting service user testing preferences was no miscarriage risk, while for health professionals, accuracy and early testing were important. The uptake of NIPD by service users was predicted to be high and includes couples that would currently decline invasive testing. Many service users (47%) and health professionals (55.2%) thought the availability of NIPD for CF would increase the pressure to undergo prenatal testing. Most service users (68.5%) thought NIPD for CF should be offered to all pregnant women, whereas more health professionals (68.2%) thought NIPD should be reserved for known carrier couples. The implications for clinical practice are discussed
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