Hardware implementation of series DC arc fault protection using fast Fourier transform

This paper proposes method of series DC arc fault protection using low cost microcontroller. Series DC arc fault occurs when gap between conductor or wire flows a current. Series DC arc fault can cause fire hazard if do not detected and protected. However, Series DC arc fault is difficult to detected using conventional protection. To detect series DC arc fault accurately using fast Fourier transform (FFT). FFT is used to transform signal in time domain to frequency domain. Series DC arc fault has different characteristic compared by normal current in frequency domain. Therefore, the proposed algorithm for protection of series DC arc fault based on magnitudes of the current in frequency domain. Hardware system is implemented by 100 V DC power supply and DC arc fault generator. Test result is conducted experimentally under varying of load current such as 2 A, 2.5 A, 3 A, 3.5 A, 4 A and 5 A. Experimental testing results show that Series DC arc fault protection has time for trip of 0.48 s, 0.26 s, 1.04 s, 0.68 s, 0.44 s and 0.48, respectively. The fastest time for trip is 0.26 s with current of 2.5 A. Therefore, the proposed algorithm for series DC arc fault protection can operate to trip accurately and have the good performance

Caracterización del Barrio Belén, localidad de La Candelaria: narrativas de adulto mayor. Adulto mayor: una percepción desde los jóvenes del sector de la Candelaria en Bogotá

Psicología Comunitaria-Servicio SocialEsta investigación es la secuencia de un abordaje realizado a la comunidad de adultos mayores de la localidad de La Candelaria. En la primera parte del proyecto se realizó una investigación con el fin de identificar las condiciones actuales de vida del adulto mayor, en donde se contó con la colaboración de gente de la tercera edad de dicha comunidad, quienes por medio de diferentes actividades como mesas de discusión y entrevistas manifestaron sus inquietudes, necesidades y puntos de vista respecto a las falencias que presentan, conformándose así la primera parte del trabajo realizado. Como respuesta a las necesidades encontradas se realiza un proceso de intervención con la construcción de varios talleres y actividades, que concienticen a la población de jóvenes de la localidad de La Candelaria hacia la situación que enfrenta el adulto mayor; y de esta manera potencializar la participación de los jóvenes en mejorar la calidad de la vida del adulto mayor de la localidad de La Candelaria.PregradoPsicólog

Perancangan dan Analisis Antena Dipole pada Frekuensi 2,4 GHz untuk Modul Xbee S2 Pro Menggunakan HFFS 14.0

Xbee s2 pro module works at 2,4 Ghz using IEEE 802.15.4 standard and polarization are linear. There are many types of antennas that can be used, which one is the dipole antenna. The simulation model implemented in this study uses Ansoft HFSS 14.0 software. HFSS stands for high frequency structure simulator is a pioneer in the use of finite element method for electromagnetic wave simulators that implement tangential vector finite elements, adaptive meshing and Adaptive Lanczos-Pade Sweep (ALPS) technology. By using HFSS 14.0 simulation, the axial ratio value of 35.0359 dB that means linier polarization. For the value of s-parameter -21,1851 db and VSWR value approaches 1, that is 1.5195 db. The gain value obtained is 0.7469 dB, the gain value needs to be optimized by using a metamaterial to get a good gain

THE EFFECTS OF HORMONAL THERAPY IN MENOPAUSE

Abstract. Through all the immediate and long-term consequences of estrogenic deprivation, menopause is an important public health issue with social, personal and economic impact. If immediate menopausal symptoms are sometimes noisy, the long-term, insidious consequences, especially cardiovascular and bone, are of major importance. In order to eliminate troublesome symptoms and prevent long-term consequences in order to provide a good quality of life for menopausal women, it is nowadays unanimously recognized that hormonal therapy is necessary in the context of adhering to recognized indications and contraindications, also rigourosly following the effects of therapy

PREVENTION WITH DESORGESTREL OF ENDOMETRIOUS CYSTS RECURRENCE AFTER SURGICAL TREATMENT

Currently, endometriosis is an important public health issue due to the increasing number of cases and the risk of developing ovarian and endometrial tumours(10% of ovarian endometrial carcinomas are associated with uterine endometrioid carcinomas), which has led to increased research into the mechanisms of appearance and progression of this condition.Although endometriosis is considered a benign chronic disease, it can show an invasive character causing severe symptoms. Endometriosis has an increasing incidence, affecting 2% of the general population, being the third gynecological cause of infertility, chronic pelvic pain, dyspareunia and dysmenorrhea. Endometriosis affects 7-15% of women of childbearing age, with 25-30% of sterility cases having a significant social impact. Endometriomas are difficult to excise due to vascularization and increased adhesion of the cyst wall. Surgical treatment of endometriosis is effective in the short term. Surgery most often reduces ovarian reserve. The rate of recurrence after surgery can be reduced with the help of menstrual suppression medications such as hormonal contraceptives. Desogestrel treatment improves intraoperative conditions mainly by reducing bleeding and increasing laxity between cyst coat and normal ovarian tissue

THE EFFECTS OF HORMONAL THERAPY IN MENOPAUSE

Abstract. Through all the immediate and long-term consequences of estrogenic deprivation, menopause is an important public health issue with social, personal and economic impact. If immediate menopausal symptoms are sometimes noisy, the long-term, insidious consequences, especially cardiovascular and bone, are of major importance. In order to eliminate troublesome symptoms and prevent long-term consequences in order to provide a good quality of life for menopausal women, it is nowadays unanimously recognized that hormonal therapy is necessary in the context of adhering to recognized indications and contraindications, also rigourosly following the effects of therapy

Pembuatan Mesin Pengering Udang Rebon Guna Meningkatkan Produktivitas Nelayan Kenjeran, Surabaya

Udang rebon merupakan hasil tangkapan utama nelayan sukolilo baru, Kenjeran, Surabaya. Saat musim panen, nelayan mampu mendapat udang rebon hingga 150kg/kapal dengan jumlah kapal yang aktif melaut ±30 unit.. Untuk menghasilkan udang rebon yang bagus, perlu proses pengeringan dengan memanfaatkan panas matahari selama 2-3 hari tergantung cuaca. Padahal puncak musim udang rebon terjadi pada saat musim penghujan. Hal ini menjadi kendala, karena nelayan masih sangat ketergantungan dengan panas matahari untuk proses pengeringan. Untuk mengatasi permasalahan tersebut, maka perlu adanya alat pengering modern. Terdapat dua bagian utama yakni bagian sistem pemanas otomatis dan sistem pengering. Sistem pemanas otomatis menggunakan pemanas infrared berbahan bakar gas LPG dengan pengatur suhu. Bagian kedua yakni sistem pengering menggunakan rak bertingkat, agar dapat menghemat lahan penjemuran. Alat pengering udang rebon menggunakan sumber bahan bakar gas LPG, dengan tujuan untuk menghemat ongkos produksi dibandingkan jika memakai sumber energi listrik. Alat ini mampu mengeringkan udang rebon hingga 50 kg dalam waktu 2.5 jam dengan suhu pemanasan 45-50 derajat celcius

Lack of Accredited Clinical Training in Movement Disorders in Europe, Egypt, and Tunisia

Background: Little information is available on the official postgraduate and subspecialty training programs in movement disorders (MD) in Europe and North Africa. Objective: To survey the accessible MD clinical training in these regions. Methods: We designed a survey on clinical training in MD in different medical fields, at postgraduate and specialized levels. We assessed the characteristics of the participants and the facilities for MD care in their respective countries. We examined whether there are structured, or even accredited postgraduate, or subspecialty MD training programs in neurology, neurosurgery, internal medicine, geriatrics, neuroradiology, neuropediatrics, and general practice. Participants also shared their suggestions and needs. Results: The survey was completed in 31/49 countries. Structured postgraduate MD programs in neurology exist in 20 countries; structured neurology subspecialty training exists in 14 countries and is being developed in two additional countries. Certified neurology subspecialty training was reported to exist in 7 countries. Recommended reading lists, printed books, and other materials are the most popular educational tools, while courses, lectures, webinars, and case presentations are the most popular learning formats. Mandatory activities and skills to be certified were not defined in 15/31 countries. Most participants expressed their need for a mandatory postgraduate MD program and for certified MD sub-specialization programs in neurology. Conclusion: Certified postgraduate and subspecialty training exists only in a minority of European countries and was not found in the surveyed Egypt and Tunisia. MD training should be improved in many countries.Peer reviewe