771 research outputs found
An automated function for identifying eeg independent components representing bilateral source activity
No full textIndependent component analysis (ICA) decomposition can be used for the identification and localization of brain generators. ICA separates EEG data into a sum of maximally distinct signals (independent components, ICs). Source localization algorithms can be directly applied to the component projections (scalp maps). Usually, brain-generated ICs are well modeled using one equivalent dipole or, in the case of IC scalp maps that appear bilaterally symmetric, with two position-symmetric dipoles. Selection of ICs for bilateral dipole fitting is typically performed by visual inspection, a time consuming and subjective step. We have developed and tested a routine for automated recommendation of ICs that may be best fit with a position-symmetric dual-dipole model. The algorithm is based on near bilateral symmetry of IC scalp map maxima and minima. Results showed good classification accuracy and specificity. Sensitivity can be optimized by adjusting free parameters as suggested
The state of emergency obstetric care services in Nairobi informal settlements and environs: results from a maternity health facility survey.
No full textBackground: maternal mortality in Sub-Saharan Africa remains a challenge with estimates exceeding 1,000 maternal deaths per 100,000 live births in some countries. Successful prevention of maternal deaths hinges on adequate and quality emergency obstetric care. In addition to skilled personnel, there is need for a supportive environment in terms of essential drugs and supplies, equipment, and a referral system. Many household surveys report a reasonably high proportion of women delivering in health facilities. However, the quality and adequacy of facilities and personnel are often not assessed. The three delay model; 1) delay in making the decision to seek care; 2) delay in reaching an appropriate obstetric facility; and 3) delay in receiving appropriate care once at the facility guided this project. This paper examines aspects of the third delay by assessing quality of emergency obstetric care in terms of staffing, skills equipment and supplies.Methods: we used data from a survey of 25 maternity health facilities within or near two slums in Nairobi that were mentioned by women in a household survey as places that they delivered. Ethical clearance was obtained from the Kenya Medical Research Institute. Permission was also sought from the Ministry of Health and the Medical Officer of Health. Data collection included interviews with the staff in-charge of maternity wards using structured questionnaires. We collected information on staffing levels, obstetric procedures performed, availability of equipment and supplies, referral system and health management information system.Results: out of the 25 health facilities, only two met the criteria for comprehensive emergency obstetric care (both located outside the two slums) while the others provided less than basic emergency obstetric care. Lack of obstetric skills, equipment, and supplies hamper many facilities from providing lifesaving emergency obstetric procedures. Accurate estimation of burden of morbidity and mortality was a challenge due to poor and incomplete medical records.Conclusion: the quality of emergency obstetric care services in Nairobi slums is poor and needs improvement. Specific areas that require attention include supervision, regulation of maternity facilities; and ensuring that basic equipment, supplies, and trained personnel are available in order to handle obstetric complications in both public and private facilitie
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No full textSocieties, international relief operations and the experiences gained during the war were the main topics held. Several reports and suggestions prepared by seven sub-committees were presented. The most important feature of the 10th Conference is that it gave a mandate to the National Societies and to the ICRC to assist victims of civil war and internal disturbances. A committee of four people had represented Turkey, and a member of the committee, Besim Omer Akalin had written down notes about the important points and framework of conference, and his expressions and thoughts. This study is aimed to present an important conference in the history of all Red Cross and Red Crescent institutions via the published notes of Besim Omer Akalin
Bandpass filters based on coupled split ring resonators for surface waves on planar Goubau lines
No full textThis paper demonstrates a method for enhancing the performance of recently introduced compact bandpass filters for terahertz surface waves on single wire waveguides, the socalled planar Goubau lines (PGLs). It is firstly shown numerically and validated experimentally that a gapped PGL loaded with a pair of split ring resonators (SRRs) acts as a bandpass filter. The concept and simulation result are validated through experiment. Furthermore, in order to achieve an improved frequency response, a third-order filter based on coupled SRRs is proposed. It is shown that while the size of the proposed filter is further reduced, it additionally benefits from a higher inband transmission, improved selectivity, and a controllable wide bandwidthAli K. Horestani, Withawat Withayachumnankul, Abdallah Chahadih, Abbas Ghaddar, Mokhtar Zehar, Derek Abbott, Tahsin Akalin, and Christophe Fumeau
77-GHz High-Gain Bull’s-Eye Antenna With Sinusoidal Profile
No full textA high-gain Bull's-Eye leaky-wave horn antenna working at 77 GHz with sinusoidal profile has been designed, fabricated, and experimentally measured. The influence of the number of periods on the gain and beamwidth is numerically investigated. Experimental measurements show a high gain of 28.9 dB, with low sidelobe level and a very narrow beamwidth in good agreement with results obtained from simulations
Ayancık ketenin altınotu bitkisiyle boyanmasında uygun mordan seçiminin gri ilişkisel analiz yöntemine göre belirlenmesi
No full textThe Effects of Fabric and Conductive Wire Properties on Electromagnetic Shielding Effectiveness and Surface Resistivity of Interlock Knitted Fabrics
No full textOur aim in this study was to investigate the effects of course density, yarn linear density and thickness and type of conductive wire on electromagnetic shielding effectiveness. Metal/cotton conductive composite yarns were produced by the core-spun technique on the ring spinning machine, involving stainless steel, copper and silver coated copper wires with 40 mu m, 50 mu m, 60 mu m thicknesses and Ne10/1 and Ne20/1 count yarns. The interlock fabrics were knitted on a 7G flat knitting machine with the three different machine settings. The EMSE and the surface resistivity of knitted fabrics were measured by the co-axial transmission line method according to the ASTM-D4935-10 standard in the frequency range from 15 to 3000 MHz and by the ASTM D257-07 standard, respectively. It was observed that all fabrics shielded around 95 % of electromagnetic waves at low frequencies, 80 % at medium frequencies and 70 % at high frequencies. Increasing the course density and thickness of conductive wire in interlock knitted fabrics increased the EMSE correspondingly. The knitted fabrics that had been produced with high yarn count showed greater EMSE because there was less isolation. The effect of the metal wire type was highly significant between 15 and 600 MHz
A research on the effect of method study on production volume and assembly line effeciency
No full textMethod study which is one of the two basic elements of work study is the most effective methods that are used to produce more effectively with current machines and labor without any need for investment. In this research, the operations in blouse sewing line are analyzed critically and the results of method study which is applied on four operations are investigated. Following that, assembly line balancing is conducted by using Ranked Positional Weight Method considering operation durations which are obtained from method study and current operation times. The aim of this research is to analyze the effects of method study on production volume and assembly line efficiency and to indicate the importance of method studies
Factors that affect consumers adoption intention of smart product innovations a study of smart bra and t shirt products as high tech innovations
No full textEffect of sock knitting maintenance costs on general production costs
No full textTextiles and apparels together are the biggest industry in Turkey which represents Over 60% of the overall exports and 14 play a very important role in the Turkish economy. Since the 1980's Turkish Textile and Apparel Industry have been growing rapidly and has become a force to be considered in the world textile trade. The Turkish sock knitting sector is one of these within textiles which has improved tremendously, since 1980 and become the 3rd largest sock exporter of the world. Maintenance and servicing of the sock knitting machines are directly related to the quality of the sock production and should not to be considered an addition to the cost and as a result increase the price of the product. The aim of this work is to investigate the maintenance, repair and revision approaches of the Turkish sock knitting industry and assess the relations between stoppage due to servicing time and machine breakage time and finally to see the effects of these on the production costs
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