234 research outputs found
Epidermophyton floccosum as apossible aethiological agent of tinea capitis: a case report
Tinea capitis is a superficial fungal infection of scalp that affects particularly school-aged children. It is usually caused by dermatophytes, although Epidermophyton floccosum can cause the tinea capitis. Tinea capitis caused by the E. floccosum is quite interesting because it can confirm the sporadic occurrence of hair parasitism by this dermatophyte. In this article, it was reported tinea capitis caused by E. floccosum. A 15-year-old girl, presented with itchy scaly alopecia on scalp since 1 week ago. The patient denied any contact with cat or dog, and there was not any family history. On physical examinations, lymphadenopathies were found at both lateral neck and alopecia with scales and crusts, lenticular to nummular sizes, at scalp. Hair-pull test was positive. The trichoscopy examination found comma hairs, broken hairs, and black dots. The fungal culture examination discovered the growth of E. floccosum. The patient was diagnosed with tinea capitis and treated with 500 mg of griseofulvin orally, 10 mg of cetirizine orally, and 2% of ketoconazole shampoo. Epidermophyton floccosum is an anthropophilic dermatophyte that frequently causes tinea cruris, tinea pedis, tinea corporis and onychomycosis, but not tinea capitis. Several reports have showed the capability of E. floccosum in perforating hairs and causing tinea capitis. In conclusion, E. floccosum is a possible aethiological agent of tinea capitis through its ability to perforate hairs
A Portfolio Approach to NLOS and Multipath Mitigation in Dense Urban Areas
Non-line-of-sight (NLOS) reception and multipath interference are major causes of poor GNSS positioning accuracy in dense urban environments. They are commonly grouped together. However, both the mechanisms by which they cause position errors and many of the techniques for mitigating those errors are quite different [1]. For example, correlation-based multipath mitigation has no effect on the errors caused by NLOS reception. University College London (UCL) has investigated the performance of a number of multipath and/or NLOS mitigation techniques in dense urban areas, including C/N0-based solution weighting [2], advanced consistency checking [3], dual-polarization NLOS detection [4] and vector tracking [5]. In this paper, we present a new multipath detection technique based on comparing the measured C/N0 on multiple frequencies and also new dual-polarization results. Meanwhile, other researchers have demonstrated NLOS detection using a panoramic camera [6, 7] or 3D city model [8, 9] and detection of NLOS and multipath using an antenna array [10]. All of these techniques bring some improvement in positioning performance in urban environments, but none of them eliminate the effects of both NLOS reception and multipath interference completely. As the different techniques are largely complementary, best performance is obtained by using several of them in combination, a portfolio approach. This paper comprises three parts. The first presents a feasibility study on a new multipath detection technique using multi-frequency C/N0 measurements. Constructive multipath interference results in an increase in the measured C/N0, whereas destructive multipath interference results in a decrease. As the phase of a reflected signal with respect to its directly received counterpart depends on the wavelength, the multipath interference may be constructive on one frequency and destructive on another. Thus, by comparing the difference in measured C/N0 between two frequencies with what would normally be expected for that signal at that elevation angle, strong multipath interference may be detected. However, the converse is not true because, depending on the path delay, the phase of the multipath interference may also be consistent across the two frequencies. Consistency across three frequencies in the presence of multipath interference is much less likely than consistency across two. Therefore, by comparing C/N0 measured across three (or more) frequencies, the chance of detection is improved substantially, noting that reliability is less critical as part of a portfolio approach to multipath detection than for a stand-alone technique. Experimental results are presented demonstrating the potential of this approach using GPS and GLONASS data collected in Central London. The second part of the paper presents the results of the first multi-constellation test of the dual-polarization NLOS detection technique pioneered at UCL [4]. This separately correlates the right hand circularly polarized (RHCP) and left hand circularly polarized (LHCP) outputs of a dual-polarization antenna and differences the resulting C/N0 measurements, producing a result that is positive for directly received signals and negative for most NLOS signals. Data was collected at six different sites in Central London and NLOS reception of both GPS and GLONASS signals was detected. Position solutions with the NLOS signals removed are compared with the corresponding all-satellite solutions. The final part of the paper addresses the portfolio approach to NLOS and multipath mitigation. Each technique is assessed qualitatively for its ease of implementation and its efficiency at detecting or directly mitigating both NLOS reception and multipath mitigation. A compatibility matrix is then presented showing which techniques may be combined without conflict. Suitable portfolios are then proposed both for professional-grade and for consumer-grade user equipment. References [1] Groves, P. D., Principles of GNSS, inertial, and multi-sensor integrated navigation systems, Second Edition, Artech House, 2013. [2] Jiang, Z., P. Groves, W. Y. Ochieng, S. Feng, C. D. Milner, and P. G. Mattos, “Multi-Constellation GNSS Multipath Mitigation Using Consistency Checking,” Proc. ION GNSS 2011. [3] Jiang, Z., and P. Groves, “GNSS NLOS and Multipath Error Mitigation using Advanced Multi-Constellation Consistency Checking with Height Aiding,” Proc. ION GNSS 2012. [4] Jiang, Z., and P. D. Groves, “NLOS GPS Signal Detection Using A Dual-Polarisation Antenna,” GPS Solutions, 2012, DOI: 10.1007/s10291-012-0305-5. [5] Hsu, L.-T., P. D. Groves, and S.-S. Jan, “Assessment of the Multipath Mitigation Effect of Vector Tracking in an Urban Environment,” Proc ION Pacific PNT, 2013. [6] Marais, J., M. Berbineau, and M. Heddebaut, “Land Mobile GNSS Availability and Multipath Evaluation Tool,” IEEE Transactions on Vehicular Technology, Vol. 54, No. 5, 2005, pp. 1697-1704. [7] Meguro, J., et al., “GPS Multipath Mitigation for Urban Area Using Omnidirectional Infrared Camera,” IEEE Transactions on Intelligent Transportation Systems, Vol. 10, No. 1, 2009, pp. 22-30. [8] Obst, M., S. Bauer, and G. Wanielik, “Urban Multipath Detection and mitigation with Dynamic 3D Maps for Reliable Land Vehicle Localization,” Proc. IEEE/ION PLANS 2012. [9] Peyraud, S., et al., “About Non-Line-Of-Sight Satellite Detection and Exclusion in a 3D Map-Aided Localization Algorithm,” Sensors, Vol. 13, 2013, pp. 829-847. [10] Keshvadi, M. H., A. Broumandan, and G. Lachapelle, “Analysis of GNSS Beamforming and Angle of Arrival Estimation in Multipath Environments," Proc ION ITM, San Diego, CA, January 2011, pp. 427-435
Variasi Komposisi Perekat Urea Formaldehida Dan Bahan Pengisi Styrofoam Terhadap Kualitas Papan Partikel Dari Limbah Batang Kelapa Sawit
The waste of oil palm trunks be redundant is alternative basic commodity manufacture particleboards. The purpose of this research was to evaluate the physical and mechanical properties of particle board made from oil palm trunk with variation of urea formaldehyde adhesives and padding Styrofoam particle board. The variation using for the urea formaldehyde adhesives and padding Styrofoam was 100 : 0 %, 90 :10%, 80 :20%, 70 : 30% and 60 :40 %. The boards were made with size 25 cm x 25 cm x 1 cm with density of 0,70% g/cm3. Particleboards using 10% and press 25 kg/cm2 by the padding Styrofoam. The temperatures was 1300 and the pressing times was 10 minute. Particleboards was tested for physical and mechanical properties.The results showed that although the density values ​​ranged from 0.565 - 0.627 g/cm ³, the water content of 7.45 - 8.23​​ %, DSA ​​81.66 - 111.84%, PT 9.99 to 16.35% MOE 6419.87 - 8660.58 kg/cm2, MOR 53.638 - 81.167 kg/cm2 and IB 0.85 - 6.11 kg/cm2. Entire physical properties have fulfilled to SNI 03-2105-2006 standards. All the mechanical properties have not fulfilled to the standards except internal bond with SNI 03-2015-2006 100 treatment: 0 % and 90: 10 %
ANALISIS SPASIAL KETERSEDIAAN RUANG TERBUKA HIJAU UNTUK MENDUKUNG PROGRAM GREEN CITY KOTA BOGOR
Kota Bogor memiliki beberapa titik RTH publik dan potensi RTH privat yang dapat dimanfaatkan untuk kebutuhan masyarakat namun ketersediaan RTH tersebut terancam dengan semakin pesatnya pembangunan dan meningkatnya jumlah penduduk. Ketersediaan RTH merupakan bagian penting dalam upaya mengatasi permasalahan lingkungan kota seperti suhu udara yang meningkat, tingkat polusi yang tinggi, berkurangnya resapan air dan terbatasnya ruang interaksi masyarakat. Upaya Kota Bogor dalam mengembangkan RTH dinilai masih belum cukup untuk disebut sebagai Green City. Oleh karena itu, tujuan penelitian ini adalah 1) mengidentifikasi dan menganalisis distribusi spasial RTH eksisting; 2) menganalisis kebutuhan RTH Publik Kota Bogor berdasarkan luas wilayah dan jumlah penduduk dan 3) menganalisis area yang berpotensi dikembangkan menjadi RTH Publik. Hasil analisis menjadi bahan pertimbangan untuk menyusun rencana pengembangan RTH berdasarkan atribut Green City dengan pendekatan green open space yang menitikberatkan pada distribusi RTH secara merata dan pendekatan green planning design untuk meningkatkan kualitas RTH kota. Kata kunci : Distribusi RTH, Green City, Ketersedian. ABSTRACT Bogor City has several public and potential private green open space that can be utilized for community needs but the availability of green open space is at risk with the rapid development and increasing population. The availability of green open space is an important part of efforts to deal with urban environmental problems such as rising air temperatures, high levels of pollution, decreasing water infiltration and limited space for community interaction. Bogor City's efforts in developing green spaces are still considered insufficient to be called a Green City. Therefore, the objectives of this study are 1) to identify and analyze the spatial distribution of existing public green open space; 2) to analyze the need for public green open space in Bogor City based on area and population; and 3) to analyze areas that have the potential to be developed into public green open space. The results of the analysis will be taken into consideration to formulate green open space development plan based on Green City attributes with a green open space approach that focuses on the distribution of green open space evenly and green planning design approach to improve the quality of urban green open space. Keywords : Green Open Space Distribution, Green City, Availability
DECISION SUPPORT SYSTEM OF REWARDING ON LECTURER PERFORMANCE USING FUZZY TSUKAMOTO METHOD CASE STUDY AT MATARAM UNIVERSITY OF TECHNOLOGY
To prepare quality and character human resources, Mataram Technological University strives to provide the best in carrying out the tridharma activities of higher education, one of which is by giving rewards in the hope that morale and loyalty can continue to be improved. However, the gift-giving system that the Mataram Technological University has implemented has not been able to bring about change because the gift-giving system is incorrect. This is because the applied reward-giving assessment system only refers to the assessment without paying attention to other criteria in the tridharma of higher education. Such as the implementation of learning, Research, and community service. Therefore, to overcome this problem, a decision support information system for awarding lecturer performance is needed, which is built using the fuzzy Tsukamoto method by considering several criteria such as Presence, Research Results, and Community Service Results. Lecturer Performance Index in carrying out the learning process. With this decision support system, the implementation of the Tridharma carried out by lecturers can continue to monitor the system and improve the quality and accreditation of study programs and universities
Pengaruh Panjang Hari, Asam Indol Asetat, dan Fosfor terhadap Tanaman Kedelai dan Kualitas Benih dalam Penyimpanan
The objective of this study was to investigate the effect of photoperiod, indole acetic acid (IAA), and phosphorus on soybean plant growth and seed quality during storage. The trial was carried out at Sebapo Experimental Station, Jambi, Center for Post Harvest Research and Development, The Ministry of Agriculture and Center for Forest Research and Development, The Ministry of Forestry, Bogor from November 2009 until June 2010. Split-split plot design was used consisted of three factors, i.e. photoperiods (12 and 14 hours 54 minutes) as the main plot, concentrations of IAA (0, 75, and 150 ppm) as subplot, and dosages of phosphorus (0, 60, and 120 kg P2O5 ha-1) as subplot. The result showed that photoperiod, IAA, and phosphorus application had significantly improved production and seed quality. The path analysis showed that the weight of 1,000 seeds affected other variables. The seed protein content has the largest path coefficient compared to other variables. The treatment of mother plant with 14 hours 54 minutes photoperiod combined with IAA of 150 ppm and P2O5 of 120 kg ha-1 resulted in the highest seed quality during 90 days of storage in room temperature
Pengaruh Stressor Renjatan Listrik (Electrical Foot Shock) terhadap Kadar Serum Alkalin Fosfatase Tikus Wistar (Rattus Norvegicus) Jantan
Stres merupakan mekanisme kompensasi tubuh guna mempertahankan homeostasis walaupun dapat menyebabkan gangguan kesehatan. Hal ini disebabkan pada saat stres terjadi Perubahan hormonal, terutama kortisol. Hormon kortisol dapat mempengaruhi kadar hormon estrogen atau androgen dimana kedua hormon tersebut berperan penting dalam proses metabolisme tulang. Pada metabolisme tulang, enzim alkalin fosfatase sangat dibutuhkan untuk pembentukan tulang. Tujuan penelitian ini adalah untuk mengetahui pengaruh stressor renjatanlistrik pada kadar serum alkalin fosfatase tikus wistar jantan. Penelitian ini merupakan eksperimental laboratoris dengan rancangan penelitian the post test only control group design. Penelitian ini dibagi menjadi dua kelompok yaitu kelompok kontrol dan kelompok perlakuan yang diberi perlakuan berupa stresor rasa sakit renjatan listrik dengan mengalirkan arus listrik 5-30mA, tegangan 25V dan frekuensi 60Hz selama 14 hari. Hasil penelitian menunjukkan bahwa rata-rata kadar serum alkalin fosfatase pada kelompok perlakuan lebih rendah dibanding kelompok kontrol. Hasil uji analisis Mann Whitney U menunjukan bahwa terdapat perbedaan yang bermaknaantara kelompok kontrol dan perlakuan (p<0.05). Kesimpulan menunjukkan bahwa stresor renjatan listrik dapat mempengaruhi proses pembentukan tulang yang ditandai dengan penurunan kadar alkalin fosfatase
Analisa Manajemen Pembiayaan Macet (Studi Pada Bmt Mitra Muamalah Jepara)
. Analisa Manajemen Pembiayaan Macet (Studi Pada BMT Mitra Muamalah Jepara). Hampir setiap lembaga keuangan baik konvensional maupun syariah yang menyalurkan dana mengalami risiko pembiayaan masalah keuangan. Oleh karena itu, perlu dilakukan penelitian bagaimana pengelolaan pembiayaan macet pada lembaga keuangan syariah. Penelitian ini menganalisis dan menggambarkan penerapan Tata Kelola Perusahaan yang Baik (Good Corporate Governance - GCG) dalam pengelolaan pembiayaan dan menggambarkan strategi kebijakan dalam mengatasi pembiayaan macet yang ada di BMT Mitra Muamalah Jepara pada tahun 2015-2016, dengan metode pendekatan kualitatif (wawancara, observasi dan dokumentasi). ) Informan dalam penelitian ini adalah pemangku kepentingan BMT Mitra Muamalah Jepara dengan teknik purposive dan snowball sampling. Metode analisis dengan teknik analisis interaktif Miles dan Huberman. Hasil penelitian menunjukkan bahwa penerapan tata kelola Perusahaan (GCG) pengelolaan pembiayaan buruk cukup baik dan dapat diterapkan untuk mengatasi masalah kredit macet yang terjadi di BMT Mitra Muamalah. Strategi untuk mengatasi kredit macet adalah membentuk tim perbaikan dan memperkuat prosedur operasi standar (SOP) pembiayaan dan memaksimalkan peran Account Officer (AO) sebagai pelaksana utama dalam proses pembiayaan penghentian non-performing
Robust Control of a Quadcopter Flying Via Sliding Mode
Sliding Mode Control (SMC) used to control the stability of a quadcopter from disturbances and uncertainties. This technique has two main advantages: the nonlinear dynamics and modelling errors of the quadcopter can be eliminated by switching function and the uncertainty problem can be overcome with a closed-loop response. The controller of the sliding mode technique consists of two components. The first is design equivalent control law to maintain the system state trajectory on the sliding surface. The second is design switching control law to reach the sliding surface. The Lyapunov theorem is used to ensure the stability of the system. Simulation results verify the robustness of the controller
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