Cloud Compute-and-Forward with Relay Cooperation

We study a cloud network with M distributed receiving antennas and L users, which transmit their messages towards a centralized decoder (CD), where M>=L. We consider that the cloud network applies the Compute-and-Forward (C&F) protocol, where L antennas/relays are selected to decode integer equations of the transmitted messages. In this work, we focus on the best relay selection and the optimization of the Physical-Layer Network Coding (PNC) at the relays, aiming at the throughput maximization of the network. Existing literature optimizes PNC with respect to the maximization of the minimum rate among users. The proposed strategy maximizes the sum rate of the users allowing nonsymmetric rates, while the optimal solution is explored with the aid of the Pareto frontier. The problem of relay selection is matched to a coalition formation game, where the relays and the CD cooperate in order to maximize their profit. Efficient coalition formation algorithms are proposed, which perform joint relay selection and PNC optimization. Simulation results show that a considerable improvement is achieved compared to existing results, both in terms of the network sum rate and the players' profits.Comment: Submitted to IEEE Transactions on Wireless Communication

Pengaruh Service Marketing Mix (Bauran Pemasaran Jasa) Terhadap Citra Merek Dan Dampaknya Pada Keputusan Pembelian (Survei Pada Peserta Lembaga Kursus Dan Pelatihan Royal English Toefl & Toeic Center Malang)

This research aims to identify and explain influence of Service Marketing Mix on Brand Image and Purchase Decision. The independent variable in this study is Service Marketing Mix, the dependent variables are Brand Image and Purchase Decision. The research method was conducted by explanatory research with quantitative approach. The research was conducted in Royal English TOEFL & TOEIC Center Malang with participants of this research are the students of Royal English TOEFL & TOEIC Center Malang who have followed the course program ≥ 4 weeks or 12 meetings and take by simple random sampling and for collecting by using questionnaire. Data analysis was conducted by descriptive and path analysis. The results showed that:Service Marketing Mix has significantly influence on Brand Image of 0,639 with a probability of 0.000 (p <0,05). Service Marketing Mix has negative influence and no significantly influence on Purchase Decision of -0,099 with a probability of 0,333 (p >0,05). Brand image has significantly influence on Purchase Decision of 0,659 with a probability of 0,000 (p <0,05)

Pengaruh Kondisi Keuangan Perusahaan terhadap Pengungkapan Tanggung Jawab Sosial

 Universitas Islam Indonesia Yogyakarta Syamsul Hadi Universitas Islam Indonesia Yogyakarta e-mail: [email protected] Pelaksanaan tanggung jawab sosial Perusahaan merupakan hal yang wajib dilakukan Perusahaan di Indonesia. Meskipun demikian, tidak disebutkan jenis aktivitas yang harus dilakukan. Kajian dalam tulisan ini bertujuan untuk melihat seberapa jauh hubungan antara kondisi keuangan Perusahaan dengan pengungkapan tanggung jawab sosial Perusahaan. Dalam penelitian ini, kondisi keuangan Perusahaan diukur dengan tingkat profitabilitas, ukuran Perusahaan, likuiditas, status Perusahaan dan tingkat hutang (leverage). Hasil penelitian mendukung hipotesis yang berhubungan dengan tingkat profitabilitas, ukuran Perusahaan, status Perusahaan dan tingkat hutang (leverage), tetapi tidak mendukung hipotesis yang berhubungan dengan likuiditas

Outlier Detection Using Nonconvex Penalized Regression

This paper studies the outlier detection problem from the point of view of penalized regressions. Our regression model adds one mean shift parameter for each of the $n$ data points. We then apply a regularization favoring a sparse vector of mean shift parameters. The usual $L_1$ penalty yields a convex criterion, but we find that it fails to deliver a robust estimator. The $L_1$ penalty corresponds to soft thresholding. We introduce a thresholding (denoted by $\Theta$) based iterative procedure for outlier detection ($\Theta$-IPOD). A version based on hard thresholding correctly identifies outliers on some hard test problems. We find that $\Theta$-IPOD is much faster than iteratively reweighted least squares for large data because each iteration costs at most $O(np)$ (and sometimes much less) avoiding an $O(np^2)$ least squares estimate. We describe the connection between $\Theta$-IPOD and $M$-estimators. Our proposed method has one tuning parameter with which to both identify outliers and estimate regression coefficients. A data-dependent choice can be made based on BIC. The tuned $\Theta$-IPOD shows outstanding performance in identifying outliers in various situations in comparison to other existing approaches. This methodology extends to high-dimensional modeling with $p\gg n$, if both the coefficient vector and the outlier pattern are sparse

Endogenous caulimovirid sequences are widespread in plant genomes

Endogenous sequences from members of the Caulimoviridae and Geminiviridae families have been identified in the genome of several plant species. They are thought to result from illegitimate recombination events and are generally replication-defective. However, some caulimovirid sequences of tobacco, petunia and banana are capable of causing infection. We performed in silico analyses on nucleotide sequences from plant genome databases and reconstituted 11 full length and potentially infectious viral genomes from endogenous viral sequences embedded in the genomes of monocotyledonous and dicotyledonous Brassicaceae, Euphorbiacae, Fabacae, Myrtaceae, Poaceae, Rutaceae, Saliaceae and Vitaceae plant species. Sequence comparisons show that the corresponding viruses belong to a new genus in the family Caulimoviridae, tentatively named Dionyvirus. Mapping of endogenous Dionyvirus sequences was achieved in two fully sequenced grape genomes, allowing for the first time the study of the distribution pattern of endogenous viral sequences at the host plant genome scale. Dionyvirus-specific primers were designed and used for a PCR-based large scale screening of plant germplasm. It showed that endogenous Dionyvirus sequences are widespread among plants of temperate, tropical and arctic origins, and belong to distinct viral species. Endogenous Dionyvirus sequences belonging to distinct viral species were also identified in single host plants, showing that endogenization of viral sequences is a common phenomenon in plants. Our work shed new lights on plant/virus molecular interactions. The potential contributions of endogenous viral sequences to normal plant functions and to plant and virus evolution will be discussed. (Texte intégral

Upaya Meningkatkan Keterampilan Berfikir Kritis Dan Keaktifan Siswa Pada Pembelajaran Matematika Melalui Pendekatan Konstruktivisme (Penelitian Tindakan Kelas Pada Siswa Kelas VII SMPN 2 Ciwaru Kab. Kuningan )

Kemampuan berpikir kritis merupakan kemampuan yang mendasar yang perlu untuk dimiliki oleh setiap orang dalam menghadapi tantangan saat ini. Sehingga rendahnya kemampuan berpikir kritis siswa saat ini merupakan suatu permasalahan yang penting dalam pendidikan matematika. Untuk mengembangkan kemampuan berpikir kritis siswa perlu adanya upaya dengan menerapkan suatu pendekatan pembelajaran yang memungkinkan siswa melakukan observasi dan eksplorasi agar dapat membangun pengetahuannya sendiri.Penelitian ini bertujuan untuk mengetahui bagaimana kemampuan berpikir kritis dan keaktifan siswa siswa setelah diterapkan pendekatan konstruktivisme dalam proses pembelajaran di kelas pada pokok bahasan bangun ruang sisi datar khusus nya pada kubus dan balok di kelas VIII-A. Konstruktivisme adalah landasan berfikir dalam pembelajaran yang menyatakan bahwa konstruksi pengetahuan dilakukan oleh siswa sendiri, dengan guru sebagai fasilitator bertugas menciptakan iklim pembelajaran yang mendukung. Dalam kelas konstruktivis seorang guru tidak mengajarkan kepada anak bagaimana menyelesaikan persoalan, namun mempresentasikan masalah dan meng\u27encourage\u27 (mendorong) siswa untuk menemukan cara mereka sendiri dalam menyelesaikan permasalahan.Penelitian ini menggunakan metode penelitian tindakan kelas. Adapun yang digunakan sebagai subyek penelitian adalah siswa kelas VIII-A, SMPN 2 Ciwaru Kabupaten Kuningan yang berjumlah 29 siswa dengan komposisi perempuan 11 siswa dan laki-laki 18 siswa. Kegiatan penelitian ini dilakukan guru dengan bermitra dengan rekan guru lain. Guru yang bersangkutan berlaku sebagai guru pengajar sedang pengamatan kegiatan pembelajaran dan aktivitas siswa dilakukan oleh rekan guru yang lain.Pelaksanaan penelitian dilakukan sebanyak tiga siklus. Berdasarkan pelaksanaan tindakan sebanyak tiga siklus tersebut, diperoleh suatu kesimpulan bahwa penerapan pendekatan konstruktivisme dapat meningkatkan keterampilan berpikir kritis dan keaktifan siswa kelas VIII-A SMPN 2 Ciwaru Kab.Kuningan. Hal ini ditandai dengan peningkatan nilai rata-rata keterampilan berpikir kritis siswa pada setiap siklusnya, yaitu siklus I (56,9), siklus II (64,7) meningkat (7,8%) dari siklus I, dan siklus III (78,16) meningkat (13,46%) dari siklus II. Hasil tersebut ditunjang dengan peningkatan hasil tes siswa pada setiap akhir siklus yaitu siklus I (63,5), siklus II (73,4) meningkat (9,9%) dari siklus I, dan siklus III (82,1) meningkat (8,7%) dari siklus II. Dan peningkatan skor rata-rata partisipasi dan aktifitas siswa setiap siklusnya, yaitu siklus I (2,26), siklus II (3,26) meningkat (20%) dari siklus I, dan siklus III (4,05) meningkat (15,8%) dari siklus II

Uji Daya Hasil Beberapa Aksesi Jarak Pagar Berpotensi Produksi Dan Berkadar Minyak Tinggi Pada Lahan Kering Di Asembagus

Pengembangan tanaman jarak pagar banyak diarahkan ke lahan kering iklim kering di wilayah Timur Indo-nesia, sehingga masalah utama yang dihadapi adalah kekurangan air. Oleh karena itu, perlu dicari bahan tanaman yang sesuai untuk lahan kering dengan produktivitas tinggi. Salah satu cara untuk memperoleh ba-han tanaman tersebut ditempuh melalui seleksi genotipe. Hasil evaluasi produksi terhadap 421 aksesi plasma nutfah di Asembagus sampai umur satu tahun telah diperoleh 26 aksesi potensial yang berproduktivitas tinggi. Untuk menindaklanjuti hasil tersebut dilaksanakan penelitian uji daya hasil terhadap 26 aksesi potensial jarak pagar dengan kontrol IP-3A, bertujuan untuk mendapatkan beberapa aksesi yang berpotensi produksi dan berkadar minyak tinggi. Penelitian dilaksanakan di KP Asembagus mulai Desember 2009 hingga Novem-ber 2010. Perlakuan disusun dalam rancangan acak kelompok diulang tiga kali. Parameter yang diamati me-liputi tinggi tanaman, jumlah cabang, jumlah tandan, jumlah kapsul/tanaman, hasil biji kering, berat 100 biji, dan kadar minyak, serta data curah hujan selama penelitian berlangsung. Analisis data menggunakan ana-lisis ragam dengan pembandingan Tukey taraf 5%. Hasil penelitian terpilih tiga aksesi jarak pagar yang da-lam kondisi tanpa pengairan di musim kemarau memiliki produktivitas lebih tinggi dibandingkan dengan IP-3A dan berkadar minyak lebih dari 35%. Tiga aksesi tersebut yaitu SM-100/NTB, HS-48/NTT, dan SP-88/ Sulsel, masing-masing sampai dengan umur 12 bulan menghasilkan biji kering sebesar 827,8 kg; 824,2 kg; dan 818,0 kg/ha dengan kadar minyak 39,5%; 41,2%; dan 39,3%. Development of physic nut (Jatropha curcas L.) is directed to dry climate in Eastern Indonesia, so the main problem encountered is the lack of water. Therefore, it is necessary to find a suitable plant material to dry land with high productivity. One way to obtain plant material was taken through genotype selection. Evalua-tion of the production of 421 germplasm accessions in Asembagus until the age of one year, has gained 26 accession of high potential productivity. To follow up on this results, another research was conducted on 26 accessions of physic nut potential to control IP-3A, aiming to get some potential accession production and high oil yield. Research conducted at Asembagus Experimental Station from December 2009 until November 2010. Treatment arranged in a randomized block design, repeated three times. Parameters observed were plant height, number of branches, number of bunches, number of capsules per plant, weight of 100 dried seed, and oil content, as well as rainfall data during the study. Analysis of data using various analysis with Tukey\u27s comparison level of 5%. The results showed that selected three accessions (SM-100/NTB, HS-48/NTT, and SP-88/Sulsel) in the absence of irrigation in the dry season up to the age of 12 months had higher productivity than the IP-3A and oil yield over 35%, viz. yield of dry beans 827.8 kg, 824.2 kg, and 818.0 kg per hectare with oil content of 39.5%, 41.2%, and 39.3%, respectively

Endogenous Dionyvirus sequences are widespread in plant genomes

Endogenous sequences from members of the Caulimoviridae and Geminiviridae families have been identified in the genome of several plant species [1, 2]. They are thought to result from illegitimate recombination events and are generally replication-defective. However, some caulimovirid sequences of tobacco, petunia and banana are capable of causing infection. We performed in silico analyses on nucleotide sequences from plant genome databases and reconstituted 11 full length and potentially infectious viral genomes from endogenous viral sequences embedded in the genomes of monocotyledonous and dicotyledonous plant species. Sequence comparisons show that the corresponding viruses belong to a new genus in the family Caulimoviridae, tentatively named Dionyvirus. Mapping of endogenous Dionyvirus sequences was achieved in the fully sequenced genomes of grape, poplar, peach and rice, allowing for the first time the study of the distribution pattern of endogenous viral sequences at the host plant genome scale. Using the TEannot pipeline from the REPET package [3], we sensitively detected virus fragments and were able to join them to recover fragmented virus sequences. Full length and partial virus sequences were found in all four genomes, evenly distributed along chromosomes; they appear to be repeated throughout the whole genome. Allelic variations of endogenous Dionyvirus sequences were also characterized in grape, using the complete sequences of a near-homozygous line and a highly heterozygous genotype, PN40024 and Pinot Noir clone ENTAV115 respectively. Dionyvirus-specific primers were designed and used for a PCR-based large scale screening of plant germplasm. It showed that endogenous Dionyvirus sequences belonging to distinct viral species are widespread among plants of temperate, tropical and arctic origins, and that endogenization of viral sequences is therefore a common phenomenon in plants. siRNAs homologous to endogenous Dionyvirus species were identified in grape, peach, soybean and orange, providing evidence that the expression of such endogenous sequences is tightly regulated and/or might trigger RNAi-based antiviral defence. (Texte intégral