Information theoretic analysis of LSD scheme

In this paper, the capacity region of Low Density Signature Multiple Access Channel (LDS-MAC) is calculated through information theoretic analysis. LDS Code Division Multiple Access (LDS-CDMA) uses spreading sequences of low density for spreading the data symbols in time domain. This technique benefits from a less complex Multiuser Detector (MUD) compared to conventional CDMA with optimum MUD; while keeping the performance close to the single user scenario for up to 200% loaded conditions. Also evaluated is the effect of different factors on the capacity of LDS MAC

Average energy efficiency contours with multiple decoding policies

This letter addresses energy-efficient design in multi-user, single-carrier uplink channels by employing multiple decoding policies. The comparison metric used in this study is based on average energy efficiency contours, where an optimal rate vector is obtained based on four system targets: Maximum energy efficiency, a trade-off between maximum energy efficiency and rate fairness, achieving energy efficiency target with maximum sum-rate and achieving energy efficiency target with fairness. The transmit power function is approximated using Taylor series expansion, with simulation results demonstrating the achievability of the optimal rate vector, and negligible performance difference in employing this approximation

Redox supercapacitor performance of nanocrystalline molybdenum nitrides obtained by ammonolysis of chloride- and amide-derived precursors

Reactions of MoCl5 or Mo(NMe2)4 with ammonia result in cubic ?-Mo2N or hexagonal ?1-MoN depending on reaction time and temperature. At moderate temperatures the cubic product from Mo(NMe2)4 exhibits lattice distortions. Fairly high surface areas are observed in the porous particles of the chloride-derived materials and high capacitances of up to 275 F g?1 are observed when electrodes made from them are cycled in aqueous H2SO4 or K2SO4 electrolytes. The cyclic voltammograms suggest charge is largely stored in the electrochemical double layer at the surface of these materials. Amide-derived molybdenum nitrides have relatively low surface areas and smaller capacitances, but do exhibit strong redox features in their cyclic voltammograms, suggesting that redox capacitance is responsible for a significant proportion of the charge stored

Tingkat Kebugaran Jasmani pada Penderita Tuberkulosis Paru di Puskesmas Rawat Jalan Sidomulyo Pekanbaru

Tuberculosis (TB) is an infectious disease caused by the bacillus Mycobacterium tuberculosis that infected among 20-43% worldwide pupulation. TB still a major health problem in the world. According to World Health Organization (WHO) there are 0,4-0,5 million patients in Indonesia. This was a descriptive observasional study to know body fitness of lung TB in Sidomulyo Outpatient Community Health Center, Pekanbaru using Harvard Step Test method. The data from the 33 patients were taken from the interview and Harvard Step Test in Sidomulyo Outpatient Community Health Center, Pekanbaru on June 2014. The result of this study indicated that 96,97% of lung TB patients whom being treated in the were have very low physical fitness. About 66,67% were male patients and 33,33% were female patients. 27,27% patients were 25-29 years old age group. In job classification were found 48,49% with mid classified jobs. By using Brinkman Index patients with medium and heavy smoking history 24.24% each, the most duration of treatment were found 75,75% in advanced phase, and 93,94% patient are orderly treated

Throughput analysis for cognitive radio networks with multiple primary users and imperfect spectrum sensing

In cognitive radio networks, the licensed frequency bands of the primary users (PUs) are available to the secondary user (SU) provided that they do not cause significant interference to the PUs. In this study, the authors analysed the normalised throughput of the SU with multiple PUs coexisting under any frequency division multiple access communication protocol. The authors consider a cognitive radio transmission where the frame structure consists of sensing and data transmission slots. In order to achieve the maximum normalised throughput of the SU and control the interference level to the legal PUs, the optimal frame length of the SU is found via simulation. In this context, a new analytical formula has been expressed for the achievable normalised throughput of SU with multiple PUs under prefect and imperfect spectrum sensing scenarios. Moreover, the impact of imperfect sensing, variable frame length of SU and the variable PU traffic loads, on the normalised throughput has been critically investigated. It has been shown that the analytical and simulation results are in perfect agreement. The authors analytical results are much useful to determine how to select the frame duration length subject to the parameters of cognitive radio network, such as network traffic load, achievable sensing accuracy and number of coexisting PUs

Meningkatkan Motivasi Belajar Siswa Pada Mata Pelajaran PKn Melalui Penerapan Metode Kolaborasi Kelas V SDN 3 Parigi

PKn siswa kelas V SDN 3 Parigi dengan penerapan metode kolaborasi. Tujuan penelitian ini adalah meningkatkan motivasi belajar siswa pada pembelajaran PKn di kelas V SDN 3 Parigi. Penelitian ini menggunakan metode penelitrian tindakan kelas yang terdiri dari empat tahapan yaitu perencanaan, pelaksanaan, observasi, dan refleksi. Teknik pengumpulan data adalah observasi, kemudian teknik analisis data menggunakan tiga tahap yaitu reduksi data, penyajian data, dan verifikasi. Hasil penelitian pada motivasi siswa mengalami peningkatan yaitu keaktifan siswa mengerjakan PR mengalami peningkatan 21,43%. Keaktifan siswa mengikuti pelajaran sebesar 35,71%, keaktifan bertanya siswa sebesar 35,71%, ketaatan siswa pada tatatertib sebesar 42,86%, keaktifan siswa mengerjakan tugas sekolah sebesar 28,57% dan prestasi belajar siswa meningkat sebesar 35,71%. Dapat disimpulkan bahwa penerapan metode kolaborasi dapat meningkatkan motivasi belajar siswa di kelas V SDN 3 Parigi

Pengendalian Sosial oleh Guru dalam Mengatasi Perilaku Menyimpang Siswa Membolos (Studi di SMA)

This research aimed to find out the forms and result of the social control by the teachers in addressing the deviant behavior of students truant (study in class X SMA Islamiyah Pontianak). The method used was descriptive. The technique of data collection techniques used were observation, interview and documentation study. The data collection tools were an observation guide, interview guidelines and documentation. The results showed the a forms of social control undertaken by teachers as an effort to prevent and cope the deviant behavior of the skipping the class done by the students. Two types of social control the first one was persuasive, that was done by giving an understanding, socialization, and guidance. Then the second one was coercive social control that was done the by warnings and punishments. At also found that the result of the social control implemented by the teacher has been running well based on the fact that the were no students who repeat that deviant behavior