Fundamental Limits of Low-Density Spreading NOMA with Fading

Spectral efficiency of low-density spreading non-orthogonal multiple access channels in the presence of fading is derived for linear detection with independent decoding as well as optimum decoding. The large system limit, where both the number of users and number of signal dimensions grow with fixed ratio, called load, is considered. In the case of optimum decoding, it is found that low-density spreading underperforms dense spreading for all loads. Conversely, linear detection is characterized by different behaviors in the underloaded vs. overloaded regimes. In particular, it is shown that spectral efficiency changes smoothly as load increases. However, in the overloaded regime, the spectral efficiency of low- density spreading is higher than that of dense spreading

Evidence of secondary relaxations in the dielectric spectra of ionic liquids

We investigated the dynamics of a series of room temperature ionic liquids based on the same 1-butyl-3-methyl imidazolium cation and different anions by means of broadband dielectric spectroscopy covering 15 decades in frequency (10^(-6)-10^9 Hz), and in the temperature range from 400 K down to 35 K. An ionic conductivity is observed above the glass transition temperature T_{g} with a relaxation in the electric modulus representation. Below T_{g}, two relaxation processes appear, with the same features as the secondary relaxations typically observed in molecular glasses. The activation energy of the secondary processes and their dependence on the anion are different. The slower process shows the characteristics of an intrinsic Johari-Goldstein relaxation, in particular an activation energy E_{beta}=24k_{B}T_{g} is found, as observed in molecular glasses.Comment: Major revision, submitted to Phys. Rev. Let

Co-Morbidity of Pituitary Adenoma and Frontal Convexity Meningioma: A Case Report and Review of the Literature

Instruction: The current study reports a woman with pituitary adenoma and frontal convexity meningioma that was detected accidentially. To the best of our knowledge, this case is considered as a rare clinical scenario.Case presentation: A 37 years old woman suffering from amenorrhea and galactorrhea had her detail investigation showed hyperprolactinemia. The patient was diagnosed with a prolactinoma, and a frontal convexity meningioma was discovered on MRI. The prolactinoma controlled with Bromocriptine therapy, while the meningioma monitored through medical observation. After two months of pharmaceutical medication, her symptoms improved with the decrease in serum prolactin.Conclusion: Thanks to sophisticated MRI techniques, meningioma and prolactinoma were incidentally detected. It should be noted that co-morbidity of prolactinoma and meningioma is very rare. The mechanism of the association between these two familiar types of intracranial tumors has not yet been clarified, which indicates the need for further studies to offer possible targeted treatment for patients.Keyword: Meningiomas; Prolactinomas; Pituitary adenomas

Adopsi Citizen's Charter (Kontrak Pelayanan) untuk Optimalisasi Pelayanan Publik (Studi pada Instalasi Rawat Jalan (IRJ) RSU Dr. Saiful Anwar Malang)

Penelitian ini bertujuan untuk mendiskripsikan dan menganalisis pelaksanaan adopsi Citizen's Charter (kontrak pelayanan) untuk optimalisasi pelayanan publik di Instalasi Rawat Jalan (IRJ) RSU Dr. Saiful Anwar Malang. Metode penelitian kualitatif dengan teknik pengumpulan data melalui wawancara, dokumentasi dan observasi. Hasil penelitian menunjukkan bahwa pelaksanaan adopsi Citizen's Charter untuk optimalisasi pelayanan publik di IRJ RSU Dr. Saiful Anwar Malang dimulai dari Tahap Persiapan, Tahap Penyusunan Draft Dokumen Citizen's Charter, Tahap Pengesahan Dokumen Citizen's Charter, dan Tahap Pelaksanaan. Dinilai dari beberapa tema yang ada dalam Citizen's Charter pelaksanaan pelayanan publik dengan adopsi Citizen's Charter (kontrak pelayanan) di IRJ RSU Dr. Saiful Anwar Malang masih belum berjalan secara optimal, terutama dalam hal ; (a) standar yang lebih tinggi, meskipun standar pelayanan diberlakukan berdasarkan kesepakatan bersama antara pihak rumah sakit dengan perwakilan unsur masyarakat pengguna layanan, namun penerapannya masih ada yang belum memenuhi kesepakatan dalam dokumen Citizen's Charter; (b) keterbukaan; adanya keterbukaan baik jenis layanan, biaya layanan, jadwal layanan, nama dokter atau petugas pemberi layanan, maupun alur dan persyaratan layanan akan tetapi dalam hal ini masih banyak pasien yang belum memahami alur pelayanan; (c) Informasi; target maupun hasil kinerja tidak dipublikasikan secara terbuka tapi hanya dimuat dalam buku laporan tahunan rumah sakit. Oleh karena itu dalam hal ini pelaksanaan Citizen's Charter di IRJ RSU Dr. Saiful Anwar Malang hendaknya dipublikasikan secara luas baik itu melalui media masa cetak maupun elektronik, website, penerbitan booklet atau leaflet agar masyarakat awam mengetahui tentang pelaksanaan adopsi Citizen's Charter di IRJ RSU Dr. Saiful Anwar Malang selain itu masyarakat juga dapat ikut mengawasi proses penyelenggaraan pelayanan apakah sudah sesuai dengan kesepakatan dokumen Citizen's Charter atau belum. Evaluasi secara berkala mengenai pelaksanaan adopsi Citizen's Charter oleh Tim Citizen's Charter yaitu antara pihak rumah sakit dengan perwakilan unsur masyarakat pengguna layanan juga sangat diperlukan untuk mengetahui tingkat keberhasilan dari pelaksanaan progam tersebut

Delineation of the Native Basin in Continuum Models of Proteins

We propose two approaches for determining the native basins in off-lattice models of proteins. The first of them is based on exploring the saddle points on selected trajectories emerging from the native state. In the second approach, the basin size can be determined by monitoring random distortions in the shape of the protein around the native state. Both techniques yield the similar results. As a byproduct, a simple method to determine the folding temperature is obtained.Comment: REVTeX, 6 pages, 5 EPS figure

What is the Benefit of Code-domain NOMA in Massive MIMO?

In overloaded Massive MIMO systems, wherein the number K of user equipments (UEs) exceeds the number of base station antennas M, it has recently been shown that non-orthogonal multiple access (NOMA) can increase performance. This paper aims at identifying cases of the classical operating regime K < M, where code-domain NOMA can also improve the spectral efficiency of Massive MIMO. Particular attention is given to use cases in which poor favorable propagation conditions are experienced. Numerical results show that Massive MIMO with planar antenna arrays can benefit from NOMA in practical scenarios where the UEs are spatially close to each other.Comment: To appear at the 2019 IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE PIMRC 2019), 5 pages, 5 figure

Short-term heat treatment of ti6al4v eli as implant material

Due to its mechanical properties and good biocompatibility, Ti6Al4V ELI (extra low interstitials) is widely used in medical technology, especially as material for implants. The specific microstructures that are approved for this purpose are listed in the standard ISO 20160:2006. Inductive short-term heat treatment is suitable for the adjustment of near-surface component properties such as residual stress conditions. A systematic evaluation of the Ti6Al4V microstructures resulting from short-term heat treatment is presently missing. In order to assess the parameter field that leads to suitable microstructures for load-bearing implants, dilatometer experiments have been conducted. For this purpose, dilatometer experiments with heating rates up to 1000 °C/s, holding times between 0.5 and 30 s and cooling rates of 100 and 1000 °C/s were systematically examined in the present study. Temperatures up to 950 °C and a holding time of 0.5 s led to microstructures, which are approved for medical applications according to the standard ISO 20160:2006. Below 950 °C, longer holding times can also be selected