Miracle-dz/UniFAR-FTUs huggingface dataset:
Performance analysis for lateral-line-inspired sensor arrays

The lateral line is a critical component of the fish sensory system, found to affect numerous aspects of behavior including maneuvering in complex fluid environments, schooling, prey tracking, and environment mapping. This sensory organ has no analog in modem ocean vehicles, despite its utility and ubiquity in nature, and could fill the gap left by sonar and vision systems in turbid cluttered environments. Yet, while the biological sensory system suggests the broad possibilities associated with such a sensor array, nearly nothing is known of the input processing and what information is available via the real lateral line. This thesis demonstrates and characterizes the ability of lateral-line-inspired linear pressure sensor arrays to perform two sensory tasks of relevance to biological and man-made underwater navigation systems, namely shape identification and vortex tracking. The ability of pressure sensor arrays to emulate the "touch at a distance" feature of the lateral line, corresponding to the latter's capability of identifying the shape of objects remotely, is examined with respect to moving cylinders of different cross sections. Using the pressure distribution on a small linear array, the position and size of a cylinder is tracked at various distances. The classification of cylinder shape is considered separately, using a large database of trials to identify two classification approaches: One based on differences in the mean flow, and one trained on a subset which utilizes information from the wake. The results indicate that it is in general possible to extract specific shape information from measurements on a linear pressure sensor array, and characterize the classes of shapes which are not distinguishable via this method. Identifying the vortices in a flow makes it possible to predict and optimize the performance of flapping foils, and to identify imminent stall in a control surface. Vortices in wakes also provide information about the object that generated the wake at distances much larger than the near-field pressure perturbations. Experimental studies in tracking a vortex pair and an individual vortex interacting with a flat plate demonstrate the ability to track vortices with a linear pressure sensor array from both small streamlined bodies and large flat bodies. Based on a theoretical analysis, the relationship between the necessary array parameters and the range of vortices of interest is established. Thesis Supervisor: Michael S. Triantafyllou Title: Professor of Mechanical and Ocean Engineering
Tactical Missile Aerodynamics: Prediction Methodology

Tactical Missile Drag Drag Prediction Methods for Axisymmetric Missile Bodies Introduction to the Aerodynamic Heating Analysis of Supersonic Missiles The Component Build-Up Method for Engineering Analysis of Missiles at Low-to-High Angles of Attack Analysis Methods and Experiments for Missiles with Noncircular Fuselages Vortex Cloud Model for Body Vortex Shedding and Tracking Panelling Methods with Vorticity Effects and Corrections for Nonlinear Compressibility Supersonic Full-Potential Methods for Missile Body Analysis Space Marching Euler Solvers Time-Asymptotic Euler/Navier-Stokes Methods for Subsonic/Transonic Flows Three-Dimensional Boundary Layers on Missiles Navier-Stokes Analyses of Flows over Slender Airframes Exhaust Plumes and Their Interaction with Missile Airframes - a New Viewpoint.
The general relationship between regular-sampled pulse-width-modulation and space vector modulation for hard switched converters

Regular sampled pulse width modulation and space vector modulation are often presented as two alternative ways to modulate a hard switched converter system. In the present work, a mathematical relationship between these two types of modulating strategies is established, using reduced forms of general AC-AC matrix converter modulation theory. The resultant modulation strategy is shown to be identical to previously reported space vector solutions, which are known to achieve minimum harmonics for both voltage source and current source inverters. This relationship is then extended to be applied to an AC-AC matrix converter, to create a simple space vector modulation algorithm for a matrix converter which can be easily implemented for real-time computation in an online control system. <<ETX>>
Predicting the radiation pattern of a radial line slot array antenna

A simple but accurate method is presented to predict the radiation pattern of a single layer Radial Line Slot Array (RLSA) antenna. In this method, radiating slots are replaced by equivalent magnetic dipoles for which excitation coefficients are obtained by employing a small-coupling theory to the coaxial-probe-launched TEM radial mode. Comparison between theoretical and experimental results for 55 cm diameter RLSA antennas show that the presented method of predicting the radiation pattern works well.
Assessment of Quality of Care Provided to Hypertensive Patients in Primary Health Care Units in Ismailia City

Background: Several studies examined the link between care processes and controlled hypertension (HTN). However, these studies may not serve as the best preface to the current state of quality of care in primary health care (PHC). Previous analyses often comprised regional rather than national data, probably restrict the generalizability of the results. Furthermore, no such researches were accomplished in Egypt. Objective: to assess the quality of care provided to hypertensive patients at PHC units in Ismailia city. Method: Seventy-two hypertensive patients regularly follow-up at PHC for >6 months were recruited into the study. Data was collected from (1) Care Performance measures, (2) Quality of Care indicators, (3) Patients’ Satisfaction (patient’s perspective about quality of care) by Arabic version of Client Perception of Coordination Questionnaire (CPCQ), and (4) Patients’ characteristics. Results: The frequency of inadequate care performance was 56.9%. Only 5.6% of our patients were under health insurance coverage. The most common deficient indicator for quality of care was performing lifestyle modification (5.6%). Approximately 60% of the patients had uncontrolled HTN and 59.7% of the cases had positive perception about the care. The most common problems facing the patients were waiting too long till receiving the services (83.3%) and 23.6% of the studied patients didn’t have any caregiver. Significant factors affecting care performance were health insurance coverage, degree of caregiver involvement and quality of care adequacy. Conclusion: Quality of care provided to hypertensive patients at the PHC in Ismailia City was inadequate.
Effect of Free Flight Conditions on Controller Performance, Workload, and Situation Awareness

Abstract : Free flight represents a major change in the way that aircraft are handled in the National Airspace System. It has the potential to significantly increase airspace utilization and, by doing so, improve aircraft throughput. The degree to which these objectives can be met without compromising aircraft safety will depend on appropriate changes in the air traffic control system. This study provides an evaluation of some of the potential effects of free flight on controllers' ability to maintain an accurate and complete picture of the traffic situation. This picture or mental representation is essential for monitoring and separation functions. The study revealed that, using current technology, some aspects of free flight may adversely influence the situation awareness and performance of controllers. The results provide information on some possible consequences of free flight that should be explored in future research.
Guard lines conformal slotted antenna array for multiband application

This work investigated a miniaturized slotted conformal antenna array for multiband application. Three guard lines are incorporated to the side of main patch and top of main patch to reduce surface current for planner surface and observe the effect of guard line due to which it resonate at three frequencies in X band and Ku band to be useful for multiband. A rectangular slot is etched at center of patches to increase the current path for wide band application. A quarter wavelength feeding network is used with good agreement of impedance matching. The main lobe width and direction shows through the radiation pattern which remains stable even it is significantly curved. This structure is wrapped around a cylinder with a diameter of 41.4 mm in the circumferential direction. It is observed that the planner antenna array operating at 8.4 GHz, 11.2 GHz &18.2 GHz with a return loss of -20 dB to -45 dB with fractional BW of 25% at 3rd frequency range and the directivity from 3.4 dBi-6.8 dBi. By doing some alteration in dimensions for the conformal antenna producing fractional BW of 20% and the directivity 5.5 to 9.1 dBi at resonating frequencies of 8.4 GHz, 11.4 GHz, and 17.5 GHz. This proposed array is simulated on CST software.
The Determinants of Development Projects’ First Disbursement Delay: The Case of the African Development Bank

International aid effectiveness has recently been significantly questioned in the development literature with regard to the large amount of aid received by developing countries to finance development projects and the mixed results achieved. However, assessment of development projects is not an easy task due to the lack of appropriate measurement tools. Several factors impact project implementation including the delay between the donors pledge to provide aid to a country and the effective first disbursement. This indicator is one of the key determinants of project performance. Nevertheless, the literature is almost silent on the evaluation of these delays, mainly due to lack of data. This paper is the first attempt to assess these delays for an international multilateral bank, the African Development Bank (AfDB). We use an exhaustive dataset of 2,195 AfDB-financed investment projects implemented between 1967 and 2008 and worth US$ 143.7 billion. Four main findings are drawn from the study. First, we find that every US$1 invested by the AfDB seems to attract US$2 more. Secondly, delay to the first disbursement is linked to the beneficiary country’s economic development. Third, large projects experience shorter delays than small projects, contrary to what is observed for private sector financed projects. Finally, pro-poor sectors seem to experience more delays and may explain the aid ineffectiveness observed in many countries. Operational recommendations are drawn from this analysis.
A Study on Stress, Self-Perception and Resilience among Undergraduate Nursing Students

Background : The aim of this study was to identify the levels of stress, self-perception and resilience of undergraduate nursing students and to recognize the correlations between them. Method : The research design is a descriptive correlational study design which used convenience sampling on 198 senior nursing students in South Korea. The used research measures were tools which measure stress, self-perception and resilience. Data collection was conducted from May 13, 2019 to May 24, 2019 using SPSS 21.0 for data analysis. Findings : The results show that stress is affected by health status, and clinical practice satisfaction. Meanwhile, resilience is affected by health status, interpersonal relationships, personality trait and major satisfaction. Stress and resilience are negatively correlated while self-perception and resilience are positively correlated. Furthermore, an increase in self-perception correlates with an increase in resilience and a decrease in self-perception correlates with a decrease in resilience. Applications : It is important for nursing leaders of education and practice to find out the sources of stress and coping strategies used by the students so that such leaders can help students effectively manage upcoming problems and situations. In addition, if the social support system that protects nursing students is systemically formed and utilized, it can not only help increase self-perception and resilience of prospective helping professionals but also improve their happiness.
Förskolebarn i matematikens värld

Olika forskningsprojekt och studier visar att matematikresultaten i skolan har forsamrats och att grundskoleeleverna tappar intresse for amnet matematik. Det nya styrdokumentet, lpfo 98 reviderad 2010, betonar vikten av matematik och sprak i forskolan. I var studie har vi undersokt hur forskolebarnens matematiska kunskapsniva paverkas av pedagogernas arbetssatt i forskolan. Vi har vidare tagit reda pa hur essentiella elevers baskunskaper i matematik ar, nar de borjar forskoleklassen i skolan. For att komma fram till ett resultat har vi valt den kvalitativa metoden och har observerat forskolebarn i 4-5ars aldern i tva forskolor med tva olika lokala pedagogiska planeringar i tva kommuner. Vidare har vi intervjuat pedagoger i tva forskoleklasser i respektive omraden. Efter analysen av vara observationer och intervjuer har vi kommit fram till att matematiken ar overallt runt omkring oss och en hel del matematik ingar i barnens vardag i forskolan oavsett pedagogiskt inriktning. Forskolepedagogernas medvetenhet kring var och hur matematik anvands kan lagga grunden for det livslanga larandet. Var undersokning pekar pa att elevers matematiska kunskaper nar de borjar forskoleklassen ar individuellt. Resultatet av vara undersokningar visar att pedagogerna i forskoleklassen inte ser nagra skillnader pa barnens matematiska kunskaper beroende pa vilken forskola de kommer ifran. Nivan pa elevernas matematiska kunskaper ar helt beroende pa barnets tidigare erfarenheter, mognadsniva samt barnens intresse for amnet. Nyckelord: Lek, Matematiska begrepp, metod, pedagogisk medvetenhet, pedagogiska miljon.
A Gamma-moment approach to monotonic boundaries estimation: with applications in econometric and nuclear fields

The estimation of optimal support boundaries under the monotonicity constraint is relatively unexplored and still in full development. This article examines a new extreme-value based model which provides a valid alternative for completely envelopment frontier models that often suffer from lack of precision, and for purely stochastic ones that are known to be sensitive to model misspecification. We provide different motivating applications including the estimation of the minimal cost in production activity and the assessment of the reliability of nuclear reactors.
Why Open Source Software / Free Software (OSS/FS, FLOSS, or FOSS)? Look at the Numbers!

This paper provides quantitative data that, in many cases, using open source software / free software (abbreviated as OSS/FS, FLOSS, or FOSS) is a reasonable or even superior approach to using their proprietary competition according to various measures. This paper’s goal is to show that you should consider using OSS/FS when acquiring software. This paper examines market share, reliability, performance, scalability, security, and total cost of ownership. It also has sections on non-quantitative issues, unnecessary fears, OSS/FS on the desktop, usage reports, governments and OSS/FS, other sites providing related information, and ends with some conclusions. An appendix gives more background information about OSS/FS. You can view this paper at http://www.dwheeler. com/oss_fs_why. html (HTML format). A short presentation (briefing) based on this paper is also available. Palm PDA users may wish to use Plucker to view this longer report. Old archived copies and a list of changes are also available.
Expansive Errors-Based Fuzzy Adaptive Prescribed Performance Control by Residual Approximation

This article is concerned with an expansive errors (EE)-based fuzzy adaptive prescribed performance control of a class of multiple-input and multiple-output nonlinear systems in the presence of unknown interconnection nonlinearities using fuzzy residual approximation technique. Based on an newly defined expansive error, residual nonlinearities’ fuzzy approximation scheme is proposed. The merits of designed control can be presented as twofold: 1) by incorporating an EE-based technique into pioneering prescribed performance control methodology, the defined intermediate and output tracking errors are kept within the regions represented by preassigned functions and control parameters simultaneously and 2) expansive errors-related residual nonlinearity is approximated by fuzzy logic systems, which further ameliorates the output tracking performance by compensating the affects raised by composite inner and interconnection nonlinearities among subsystems. With the designed expansive errors-based fuzzy adaptive prescribed performance control, all the closed-loop signals are kept bounded in the sense of Lyapunov stability theorem. Comparative simulation studies are presented to verify the effectiveness and advantages of theoretical findings.
Batch and Packed Bed Column Study for the Removal of Cr (VI) and Ni (II) Using Agro-Industrial Wastes

The objective of this study was to prepare bio adsorbents from agro-industrial wastes from yam starch (YSR) and plantain (PSR) production for its use in the removal of Cr (VI) and Ni (II) in aqueous solution in batch and continuous packed-bed column systems. Bromatological analysis showed that the biomaterials are rich in cellulose, lignin, hemicellulose, and SEM micrographs that evidence a mesoporous structure characteristic of materials of lignocellulosic origin. FTIR evidenced functional groups such as hydroxyl, carbonyl, and methyl, possibly involved in the uptake of metal ions. EDS and FTIR analysis after adsorption confirmed that the retention of the metals on the surface of the adsorbent materials was successful. Cr (VI) and Ni (II) removal efficiencies above 80% were achieved using YSR and PSR in batch systems at the different conditions evaluated. The optimum conditions for removing Ni (II) on PSR were a bed height of 11.4 cm and a temperature of 33 °C, while for YSR, they were: 43 °C and 9 cm for temperature and bed height respectively. The variable with the most significant influence on the removal of Cr (VI) in a batch system on the two bio adsorbents was temperature. In contrast, the adsorbent dose and temperature are relevant factors for PSR Ni (II) removal. Therefore, the residues from the preparation of yam and plantain starch have high potential for removing heavy metals from wastewater and are presented as an alternative for their final disposal.
Utilising intrinsic robustness in agricultural production systems

This paper explores the potential of utilising robust crops and livestock for improving sustainability of agriculture. Two approaches for dealing with unwanted fluctuations that may influence agricultural production, such as diseases and pests, are discussed. The prevailing approach, which we call the ‘Control Model’, is to protect crops and livestock from disturbances as much as possible, to regain balance with monitoring and intervention and to look for add-on solutions only. There are a number of problems associated with the Control Model, including reduced animal welfare, environmental pollution and low public support. An alternative approach, which we call the ‘Adaptation Model’, is based on reducing the consequences of disturbances rather than taking disturbances out
Asynchronous Motor Nonlinear Control with Inverter Output LC Filter

In many adjustable electric drives the LC filter is used to smooth the voltages and currents supplying AC motors. The LC filter makes it difficult to implement precise control of these motors especially in the case of speed sensorless solution. Because measuring motor currents and capacitor voltages is not practical, a preferable solution is to measure only filter input current. A good approach is to use observers to restore unmeasured state variables. Additionally, it is necessary to modify the used control in case of the drive with LC filter. In this paper the proposed system with nonlinear control method of the asynchronous motor, and the speed and flux observer structure were been adapted regarding the LC filter. In the presented drive only sensors previously used in the system without LC filter were used. 1.5 kW drive was verified in by simulation and experiments.
An Empirical Study of Factors Influencing the Use of Knowledge Management Systems in A Public Sector Organization

The main purpose of this study is to explore the factors influencing the use of knowledge management systems (KMS). The research model was built on the basis of task-technology fit (TTF) framework as well as DeLone and McLean's information systems success model. Data were collected by using a questionnaire survey sent to a public sector organization in Taiwan, and structural equation modeling (SEM) was used to analyze hypothesized relationships between the constructs in the research model. The implications of the findings for knowledge management systems practice are discussed. Moreover, the limitations, contributions and future research of this study are examined. Finally, this paper provides a valuable reference for business managers and information systems executives whom are initiating or conducting knowledge management exercises in the e-business era, and for researchers interested in the fields of e-business and knowledge management.
Computational journalism in the UK newsroom

As new forms of multimedia, data-driven storytelling are produced by news organisations around the world, programming skills are increasingly required in newsrooms to conduct data analysis and create interactive tools and news apps. This has prompted some universities to combine journalism courses with computer skills and there is much hype about the emergence of hybrid programmer-journalists, journo-coders, journo-devs who are equally proficient writing code and copy. To date, most of the academic research into computational journalism in the newsroom has been restricted to the United States where studies suggest a model whereby the roles of journalist and programmer are merged. There is, therefore, a need to identify the extent to which this organisational model is replicated in newsrooms in other parts of the world. This paper is an exploratory study into two news organisations in the UK – the BBC and the Financial Times – to investigate the extent to which journalism skills and programming skills are being combined and the different professional identities being created. This study finds that the journalists and programmers are considered as two distinct professions and the idea of a hybrid role is rejected by the newsroom staff interviewed. A new model is identified in the newsroom whereby teams consisting of journalists, programmers and designers work closely together on interactive, data-driven projects. These findings are valuable to journalism educators in that they identify the technical skills and attitudes required by journalists working on innovative storytelling formats.
Broken damper bar detection studies using flux probe measurements and time-stepping finite element analysis for salient-pole synchronous machines

Detection of broken damper bars in salient-pole synchronous machines has not been reported in the literature, because the cases of broken damper bars in salient-pole machines are not common. Stringent starting cycles in a pumped storage hydroelectric generator caused broken bars after almost 40 years of service. Development of on-line monitoring and detection of broken bars has been attempted by using flux probes attached to the stator bore surface for measurement of air gap flux waveform during acceleration from standstill to rated speed. Measurements of flux probe signals and finite element modeling and simulation of electromagnetic transients during acceleration of the pumped storage generator show the viability of the air gap flux probes for the development of an on-line monitoring method for broken damper bar detection.