Two-Stage LASSO ADMM Signal Detection Algorithm For Large Scale MIMO

This paper explores the benefit of using some of the machine learning techniques and Big data optimization tools in approximating maximum likelihood (ML) detection of Large Scale MIMO systems. First, large scale MIMO detection problem is formulated as a LASSO (Least Absolute Shrinkage and Selection Operator) optimization problem. Then, Alternating Direction Method of Multipliers (ADMM) is considered in solving this problem. The choice of ADMM is motivated by its ability of solving convex optimization problems by breaking them into smaller sub-problems, each of which are then easier to handle. Further improvement is obtained using two stages of LASSO with interference cancellation from the first stage. The proposed algorithm is investigated at various modulation techniques with different number of antennas. It is also compared with widely used algorithms in this field. Simulation results demonstrate the efficacy of the proposed algorithm for both uncoded and coded cases.Comment: 5 pages, 4 figure

Modification of the Charge ordering in Pr1/2_{1/2}Sr1/2_{1/2}MnO3_{3} Nanoparticles

Transport and magnetic properties have been studied in two sets of sol-gel prepared Pr$_{1/2}$Sr$_{1/2}$MnO$_{3}$ nanoparticles having average particle size of 30 nm and 45 nm. Our measurements suggest that the formation of charge ordered state is largely affected due to lowering of particle size, but the ferromagnetic transition temperature ($T_{C}$) remains unaffected.Comment: Accepted in J. Appl. Phy

Upaya Alih Teknologi Pembuatan Virgin Coconut Oil di Desa Klapagading Kecamatan Wangon

Kegiatan ini bertujuan untuk memberikan pengetahuan dan ketrampilan kepada ibu rumah tangga dan remaja putri mengenai pembuatan Virgin Coconut Oil. Pelaksanaan kegiatan secara keseluruhan berlangsung selama 8 (delapan) bulan. Rangkaian kegiatan yang dilakukan terdiri dari (1) orientasi lokasi, (2) persiapan bahan, alat, dan materi, (3) kegiatan pelatihan, (4) pengamatan hasil pelatihan, dan (5) evaluasi terhadap pelatihan. Berdasarkan pada hasil evaluasi dan pembahasan, maka dapat disimpulkan bahwa ibu-ibu dan remaja putri di Desa Klapagading, Kecamatan Wangon sudah mulai menyadari dan mengerti pentingnya peranan pengembangan agroindustri khususnya minyak VCO sebagai sarana penunjang kesehatan dan menambah pendapatan keluarga. Selain itu peserta mengetahui peluang dan tantangan agroindustri VCO dengan benar dalam upaya meningkatkan ketrampilan dan pendapatan dari bidang pertanian. Di sisi lain mereka juga bertambah pengetahuannya tentang teknologi pembuatan VCO pada skala rumah tangga secara optimal

Pengaruh Konsentrasi Ekstrak Daun Kemangi (Ocimum Sanctum) untuk Pengendalian Akar Gada (Plasmodiophora Brassicae) pada Tanaman Caisim (Brassica Juncea L.)

People demand on Caisim (Brassicaejuncea L.) is progressively increasing. One of offorts that can be applied for increasing Caisim crop is by fertilization. Clup root disease caused by Plasmodiophorabrassicae fungi is the most important fungal plant disease infecting cabbagecrop types. This pathogenic fungal infection causes crop damage until 100% or crop failure. One of the disease integeated controlling components that can be developed is biological control. One of biological pesticides for controlling this fungal plant disease is Basil plant.This research aimed to observe effect of the best basil concentration extract for club root control. It was conducted in Laboratory of UniversitasMuhammadiyahPurwokerto and Dukuwaluh Village, Kembaran Sub-district. The research period was three (3) months : Juneto September 2016. The researcher used Random Group Design (RAK). The tested factor including only one factor. K0: control, K1: 50 g/l, K2 : 100 g/l, K3 : 150 g/l, K4 : 200 g/l. the effect of Bassil extract on K1 concrentation resulted the disease with the highest score0.75%, K2 concentration resulted the disease whit the highest disease index 1.17, K4 concentration resulted the tallest plant height 10.1 cm and K3 concentration resulted the heaviest wotwoight 12.2 g

Stress and its associated factors among medical students in a public medical faculty, Malaysia

Background: Stress is common among university students. Levels of stress vary between the students of different courses in the university and many factors are associated with it. As compared to other professional courses, medical students are more prone to get depressed because medical education is known to be stressful and very demanding. Materials and Methods: This is a cross-sectional study using a pretested, self-administered questionnaire involving all medical students in academic session 2013/2014. The questionnaire consists of 3 parts; socio-demographic information, family factors and personal factors; Depression, Anxiety and Stress Score 21 questionnaire (DASS 21) and Duke University Religion Index (DUREL). DUREL measures religiosity in 3 scales namely; organized religious activity (ORA), non-organized religious activity (NORA) and intrinsic religiosity (IR). The questionnaire was distributed to all medical students available in FMHS during the data collection period. Data collected were analyzed using IBM SPSS version 21. Result: Of 409 medical students, 329 (80.4%) responded. Most (50.5%) were aged 22 years and above, majority (62.3%) were female students. Respondents were mainly Malay (54.4%) and Muslims (56.8%). Stress prevalence in medical students were 19.8%. Stress prevalence was higher among students aged ≤ 21 years (22.1%), male (20.2%), Indian (24.0%) and Hindus (31.6%),among students with father of primary education level (21.4%), mother of tertiary education level (25%) and low income family (21.4%). Prevalence of stress among students in pre-clinical year (21.4%) and clinical year students (17.9%), p>0.05. Stress among students who did not undergo matriculation course and those who attended were 21.7% and 18.8%, respectively. Proportion of stress students who entered medical school not on their own choice and on their own choice were 24.3% and 18.5%, respectively, p>0.05. Medical students with poor ORA and NORA showed higher proportion of stress (20.2%, 20.6% respectively) however, students with good IR had higher proportion of stress compared to those with poor IR (20.0%, 19.5%, p>0.05). Conclusion: Stress is prevalent among almost one-fifth of medical students, especially those in their pre-clinical years of studies. Students’ involvement in religious activities could be beneficial to prevent stress. Further research is needed to assess the effect of medical training on stress and the effect of religiosity on stress coping

Pengaruh Sterilan dan Waktu Perendaman pada Eksplan Daun Kencur ( Kaemferia Galanga L) untuk Meningkatkan Keberhasilan Kultur Kalus

Penelitian ini bertujuan mempelajari pengaruh senyawa kimia Bayclin (Natrium hipoklorid/NaClO) dan alkohol 70% terhadap penurunan kontaminasi eksplan daun kencur, mencari pengaruh waktu perendaman senyawa kimia sterilan terhadap pertumbuhan eksplan daun kencur serta mengetahui pengaruh interaksi antara senyawa kimia sterilan dan waktu perendaman terhadap peroleh kultur kalus kencur yang bebas kontaminasi. Penelitian ini dilaksanakan pada bulan Oktober 2009 sampai dengan bulan April 2010 di Laboratorium Kultur Jaringan Universitas Muhammadiyah Purwokerto. Rancangan yang digunakan adalah Rancanmgan Acak Lengkap (RAL) dengan 3 ulangan. Variabel pengamatan meliputi : Persentase kontaminasi, persentase eksplan yang tumbuh, waktu pertama kontaminasi muncul, dan sumber kontaminan (Bakteri/jamur). Hasil penelitian menunjukkan bahwa Penggunaan senyawa kimia bayclin (Natrium hipoklorid/NaClO) 20%dan alcohol 70% mampu mengurangi kontaminasi baik eksternal maupun internal yang disebabkan oleh jamur maupun bakteri. Waktu perendaman eksplan dalam senyawa kimia sterilan dengan lama waktu perendaman berkisar 5-10 menit mampu menurunkan kontaminasi antara 35-56 % dalam penelitian ini. Kombinasi penggunaan senyawa kimia bayclin 20% selama 10 menit dan alcohol 70% selama 10 menit mampu menurunkan kontaminasi pada eksplan berkisar 42%

Chagas disease. The use of serology to establish drug efficacy. Value and limitations*

*Presented at the ”Consultative Meeting on the Strategic and Operational Aspects for the Clinical Development of Trypanocidal Drugs for Chagas Disease, 23-24 April 2007, Buenos Aires, Argentina.”, sponsored by TDR, WHO. This publication is dedicated to one of the authors (deceased) due to his life dedicated to Chagas disease and particularly to this subject. After 14 years, this material is still valid

Ideal Legal Concept of Fidusia Guarantee Registration Obligations by Justice-Based Financing Companies

In lending and borrowing activities, there are legal products used by the community in the form of guaranteeing goods to obtain financing. This is where fiduciary security is present to meet legal needs in guaranteeing lending and borrowing activities. This study aims to (1) review and analyze the implementation of Fiduciary registration obligations by finance companies based on Law Number 42 year 1999 concerning Fiduciary Guarantees (hereinafter referred to as UUJF), (2) review and analyze law enforcement in finance companies that do not register guarantees and formulate the ideal legal concept of justice-based fiduciary registration obligations. This study used research on normative law which includes legal principles, legal systematics, legal synchronization, and legal history. The findings in this study are first, the implementation of Fiduciary registration obligations by finance companies, are not obeyed or ignored by finance companies, because UUJF does not regulate legal sanctions. Second, law enforcement in finance companies that do not register guarantees is not optimal, synchronization and disharmony occur in the UUJF with the Regulation of the Minister of Finance Number 130/PMK.010/2012, the provisions of UUJF have no forced efforts in terms of law enforcement of the obligations of finance companies to register fiduciary guarantees. Third, the ideal legal concept is the obligation to register fiduciary collateral based on justice through institutional reconstruction, structure and legal culture

On the information freshness and tail latency trade-off in mobile networks

AbstractWith the advent of emerging mission-critical applications, sampling information updates and scheduling mobile traffic in a timely manner are very challenging. In addition, maintaining fresh information and low latency communication is important to these applications. To that end, in this paper, we first derive closed-form expressions for the latency tail probability (LTP) and the average age of information (AoI) in M/G/1 systems, where shifted exponential service time is considered. Different from the majority of existing work in this domain, our analysis is derived assuming different update sizes with different priority levels. Next, we have developed novel policies for sampling and scheduling the information updates over the choice of one (or a set) of the parallel links, e.g., WiFi and LTE links. Then, a joint minimization of AoI and LTP is formulated and efficient algorithms are provided. Unlike queue-based policies, our scheduling approach over parallel links enjoys two key advantages. First, the scheduling decision is independent of the queue length and is thus less complex. Second, it can differentiate the updates of the apps to further prioritize the very-timely sensitive information (e.g control signals) over other messages that can tolerate more delay (e.g., status updates). Our evaluation results show significant improvements of the proposed approaches as compared to the state-of-the-art algorithms.Abstract With the advent of emerging mission-critical applications, sampling information updates and scheduling mobile traffic in a timely manner are very challenging. In addition, maintaining fresh information and low latency communication is important to these applications. To that end, in this paper, we first derive closed-form expressions for the latency tail probability (LTP) and the average age of information (AoI) in M/G/1 systems, where shifted exponential service time is considered. Different from the majority of existing work in this domain, our analysis is derived assuming different update sizes with different priority levels. Next, we have developed novel policies for sampling and scheduling the information updates over the choice of one (or a set) of the parallel links, e.g., WiFi and LTE links. Then, a joint minimization of AoI and LTP is formulated and efficient algorithms are provided. Unlike queue-based policies, our scheduling approach over parallel links enjoys two key advantages. First, the scheduling decision is independent of the queue length and is thus less complex. Second, it can differentiate the updates of the apps to further prioritize the very-timely sensitive information (e.g control signals) over other messages that can tolerate more delay (e.g., status updates). Our evaluation results show significant improvements of the proposed approaches as compared to the state-of-the-art algorithms