Miracle-dz/UniFAR-FTUs huggingface dataset:
Evaluation of the healing activity of Cucurbita spp. leaf and seed extracts on experimental thermal burns

Burns are the most common skin injuries associated with many complications and high incidences of wound infections. Many compounds of plant products have been assessed to accelerate wound healing or reduce contamination. The possible healing effect of two Cucurbita spp. in skin burns was investigated. Cucurbita maxima and Cucurbita pepo leaves and seeds were extracted using ethanol and analyzed by gas chromatography–mass spectrometry. Second-degree burn wounds were made on laboratory rats, and the burn wounds were applied topically with extracts for 14 days and silver sulfadiazine (SS) for comparison. Serum vascular endothelial growth factor (VEGF) was analyzed posttreatment. Hydroxyproline content and histopathological changes were evaluated in skin biopsy. Phytochemical analysis displayed that C. maxima leaf extracts contain linolenic acid (21.94%), phytol (6.45%), and ascorbic acid (9.09%), and they were characterized by glucopyranoside (8.49%) and limonene (5.39%) compounds. The C. pepo leaves were characterized by palmitic acid (48.04%) and alkaloid (tetratriacontane: 13.11%). The seeds extracts of both Cucurbita spp. revealed a high ratio of linoleic acid, palmitic acid, and ascorbic acid. The leaf extracts accelerated wound contraction by 100%, with normal skin appearance, due to their more structural tissue layers, regular collagen fibers, ability to reduce inflammation, and high hydroxyproline content compared to the seed extracts and SS group. The bioactivity of unsaturated fatty acids, ascorbic acid, monoterpene, glycosides, and alkaloids provided the therapeutic property of these extracts. Serum VEGF was significantly reduced in the groups treated with extracts compared with those treated by the SS group. The leaf extracts of both Cucurbita species exhibited a healing efficiency on burn wounds, which were more effective than the seed extracts. Thus, they can be used as a promising plant derivative in burn treatments.
A 0.5-4.0-GHz Tunable Bandpass Filter Using YIG Film Grown by LPE

A tunable bandpass filter using YIG film grown by liquid phase epitaxy (LPE) has been developed. Taking advantage of the very low resonance frequency in the perpendicular resonance of YIG film, an operation frequency of 0.5 GHz has been achieved. In order to make this filter operate up to 4.0 GHz, a new technique for multioctave tuning has been developed and applied to the filter. Over the wide tuning range from 0.5 GHz to 4.0 GHz, low insertion loss and high spurious suppression have been achieved. The performance of this filter satisfies the requirements for use as a tracking preselector in a microwave spectrum analyzer.
Energy Management Strategies at Emergency Department Block C Hospital Sungai Buloh, Malaysia

Energy is an important element in human daily life. In Malaysia, about 80% of electrical energy produced from burning fuels that will cause of carbon dioxide emission to atmosphere. The effect could be reduced with less energy consumption. This project focuses on energy management strategies for energy saving that can be done on the HVAC system, air-cond, lighting and office equipment in Emergency Department, Block C Hospital Sungai Buloh. The annual profit, total cost and payment period for each research method are also studied. To implement for all major system must be link to chapter by Buiding Automation System. Major studies for this topic is to implement energy saving, calculate energy comsumption, power, area specific room, return of investment, analysis for daily cost for used, total for kWh for monthly usage.
Repetitive current control of two-level and interleaved three-phase PWM utility connected converters

This thesis is mainly concerned with investigations into digital repetitive current control of two-level and interleaved utility connected PWM converters. The research is motivated by the relatively poor performance of classical (PI) controllers when the utility voltage harmonic distortion is high. This is due to the low gain, and poor disturbance rejection of the PI controller at the utility harmonic frequencies. Repetitive feedback controllers have the ability to track or reject periodic disturbances, such as utility harmonics, as they naturally have high gains at the utility voltage harmonic frequencies, assuming that these frequencies do not change. Repetitive controllers (RC) are known for being sensitive to variations in system parameters and disturbance frequency, which in practice renders them either ineffective or unstable. Another challenge arises from the memory requirements of RC in case of the absence of even harmonics, which can make its practical implementation difficult and expensive. In addition, another problem that has not been investigated extensively in the literature is that the effectiveness of RC is severely limited by the limited bandwidth of the plant (the utility connected converter and its filter). Theoretical analysis and simulation results presented in this thesis show that RC could not effectively reject disturbances at frequencies above the closed loop system bandwidth. The design of the converter's output filter bandwidth and the values of its components need to be selected carefully, to enable RC to be used effectively. The research in this thesis focuses on investigating the practical implementation and performance limits of two types of repetitive controllers (conventional and oddharmonics), used for current control of two-level utility connected converter with LCL output filter. The odd-harmonic repetitive controller halves the memory requirement and offers higher gains only at odd harmonic frequencies of interest. The overall control scheme consists of the traditional classical tracking controller with a dual loop feedback system and RC. The results indicate that the repetitive controller improves the steady state error and the total harmonic distortion of the output current, provided that the plant's bandwidth is sufficiently large. Finally, a repetitive controller for an interleaved utility connected converter has been designed and investigated in this study. The interleaved converter system has higher bandwidth than the two-level converter, which improves the effectiveness of RC. It provides good disturbance rejection compared to classical controllers which results in low output current THD. The RC was demonstrated to be robust despite uncertainty in utility impedance, while achieving a fast almost zero error convergence. The proposed RC has been experimentally implemented using a DSP and the results indicate that the quality of output current complies with international standards on harmonic limits and matches simulation results obtained from the Matlab/Simulink model of the system.
Performance and near wake measurements of a model horizontal axis wind turbine

The performance characteristics and the near wake of a model wind turbine were investigated experimentally. The model tested is a three-bladed horizontal axis type wind turbine with an upstream rotor of 0.90 m diameter. The performance measurements were conducted at various yaw angles, a freestream speed of about 10 m s −1, and the tip speed ratio was varied from 0.5 to 12. The time-averaged streamwise velocity field in the near wake of the turbine was measured at different tip speed ratios and downstream locations. As expected, it was found that power and thrust coefficients decrease with increasing yaw angle. The power loss is about 3% when the yaw angle is less than 10° and increases to more than 30% when the yaw angle is greater than 30°. The velocity distribution in the near wake was found to be strongly influenced by the tip speed ratio and the yaw angle. At the optimum tip speed ratio, the axial velocity was almost uniform within the midsection of the rotor wake, whereas two strong peaks are observed for high tip speed ratios when the yaw angle is 0°. As the yaw angle increases, the wake width was found to be reduced and skewed towards the yawed direction. With increasing downstream distance, the wake velocity field was observed to depend on the tip speed ratio and more pronounced at high tip speed ratio. Copyright © 2011 John Wiley & Sons, Ltd.
A new theory of the characteristic impedance of general printed transmission lines applicable when power leakage exists

Conventional definitions of the characteristic impedance, such as the voltage-current, power-current, and power-voltage methods, which have been commonly used for standard nonleaky transmission lines, become invalid when power leakage occurs. In this paper, we present a new theory of the characteristic impedance for printed transmission lines, applicable under the general conditions with or without power leakage. The theory is founded on dual field and circuit theories of transmission lines, formulated in the spectral domain, and uses a new approach called "the wavenumber perturbation approach. " In order to correctly compute the complex characteristic impedance under leakage conditions, the new theory requires to carefully "extract out" the surface-wave or parallel plate-wave poles on the complex k-plane. In obvious difference to this, it is well known that the poles must be "included" for a correct solution of the complex propagation constant of the leaky line. Incidentally, unlike the conventional methods, the new theory derives the complex characteristic impedance together with the solution of the phase and attenuation constants, in a single unified procedure. This avoids additional efforts in computational or analytical/formulational complexity. Results for selected cases of interest are presented, which demonstrate the validity and simplicity/elegance of the new theory.
SPECTRAL DOMAIN ANALYSIS OF COPLANAR STRIP DISCONTINUITIES

The characteristics of a coplanar strip discontinuity can be obtained accurately by employing the spectral domain technique which takes into account the radiation from the discontinuity. As an example, a coplanar strip open end is examined, and the reactive and resistive parts of its equivalent circuit are computed. The obtained reactance is shown to be in good agreement with that obtained from the theory and measurement reported recently in the literature. © 1997 John Wiley & Sons, Inc. Microwave Opt Technol Lett 15: 395–398, 1997.
Requerimiento hídrico y edad de trasplante del calabacín (Cucúrbita pepo L.) bajo riego por goteo en el Valle del Rio Guarapiche

El presente trabajo se realizó en el sector San Vicente, Municipio Maturín Estado Monagas, Venezuela entre los meses de Junio-Septiembre del 2015, con el objetivo de determinar el efecto de cuatro láminas de riego y dos edades de trasplante sobre las variables físicas de número de frutos, longitud, diámetro y peso del fruto en el cultivar Shiraz de calabacín (Cucurbita pepo L.). Se utilizó un diseño experimental de bloques al azar con tres repeticiones, con arreglo de parcelas divididas, donde la parcela principal fueron las diferentes láminas de riego y las subparcelas las dos edades de trasplante. Se aplicaron 8 tratamientos que resultaron de la combinación de las edades de trasplante, edad 1 (14 días) y la edad 2 (21 días) y cuatro criterios de riego consistentes en reponer el equivalente al 60%, 80%, 100% y 120% de la evapotranspiración del cultivo (ETc). Un tanque evaporímetro tipo “A” se utilizó para estimar la evapotranspiración del calabacín. De los resultados obtenidos se concluye que la lámina de riego y la edad de trasplante que más efecto tuvo en la calidad de los frutos de calabacín fue la lámina de 120 % de ETc y la edad de trasplante 2 (21 días). Se confirma el efecto negativo de las condiciones de déficit de riego sobre los atributos de calidad física. En este trabajo las variables más afectadas fueron peso y número de frutos.
Enhancements of the spectral-domain approach for analysis of microstrip Y-junction

Some enhancements of the spectral-domain approach in the polar coordinate are described. A simple and efficient algorithm is devised to numerically evaluate the contribution of the oscillatory tail of the two-dimensional (2-D) Sommerfeld integral. For the first time, four new vectorized basis functions are proposed. Good agreement is obtained between the simulated results and the measured data for a microstrip Y-junction in the 4-12 GHz range.
A new wireless and miniaturized high-resolution optical displacement sensor

A wireless displacement sensor is proposed which is composed of a fixed active head and a passive head which moves relatively to a grating scale. The passive head comprises a grating and two mirrors. It can be so small as to be inserted non-obtrusively where the displacement must be measured without spoiling the system optimum by undesirable size and structural compromises. It is insensitive to electromagnetic perturbations. The key characteristics of the sensor are high resolution and a very small size. The encoder uses a fixed grating scale as in standard designs, a passive-optical read head on the moving element and a stationary, opto-electronic source/detector module. Communication between the moving head and the detector module is done without cables using a free-space optical interconnection.
Screening of Potential Indonesia Herbal Compounds Based on Multi-Label Classification for 2019 Coronavirus Disease

Coronavirus disease 2019 pandemic spreads rapidly and requires an acceleration in the process of drug discovery. Drug repurposing can help accelerate the drug discovery process by identifying new efficacy for approved drugs, and it is considered an efficient and economical approach. Research in drug repurposing can be done by observing the interactions of drug compounds with protein related to a disease (DTI), then predicting the new drug-target interactions. This study conducted multilabel DTI prediction using the stack autoencoder-deep neural network (SAE-DNN) algorithm. Compound features were extracted using PubChem fingerprint, daylight fingerprint, MACCS fingerprint, and circular fingerprint. The results showed that the SAE-DNN model was able to predict DTI in COVID-19 cases with good performance. The SAE-DNN model with a circular fingerprint dataset produced the best average metrics with an accuracy of 0.831, recall of 0.918, precision of 0.888, and F-measure of 0.89. Herbal compounds prediction results using the SAE-DNN model with the circular, daylight, and PubChem fingerprint dataset resulted in 92, 65, and 79 herbal compounds contained in herbal plants in Indonesia respectively.
Budget-Constrained Service Allocation Optimization for Mobile Edge Computing

The service resource allocation strategy optimization problem has always been a hot issue in mobile edge computing (MEC). In this article, we formulate the problem as a long-term quality of service (QoS) improvement problem while satisfying the budget of MEC service provider (MSP). Since it is very unrealistic to accurately obtain the request information of user equipments (UEs) over a long time, we first transform the original problem into a series of real-time linear programing sub-problems by using Lyapunov optimization method, and propose a centralized algorithm to determine the resource allocation strategies. However, since the sub-problems are still NP-hard problems, it is a huge challenge to determine the strategies for all UEs with the centralized algorithm in a large scale MEC environment. Thus, we then formulate the sub-problem as an <inline-formula><tex-math notation="LaTeX">$N$</tex-math><alternatives><mml:math><mml:mi>N</mml:mi></mml:math><inline-graphic xlink:href="ding-ieq1-3133547.gif"/></alternatives></inline-formula> players non-cooperative game, prove that there exists a Nash equilibrium, and develop two iterative algorithms to find the Nash equilibrium while determining the strategies. Experimental results show that the algorithms can take into account QoS and budget of MSP at the same time, and perform better compared to five other common schemes.
Integrating Computer-Based Technology In Higher Education Programs: Availability, Utility, Opinions, And Anxiety Of University Teachers

The current study was designed to assess the integration of computer-based technology tools in universities of southern Punjab, Pakistan. Integration of technology has become the major concern of educational institutions. This is because that technology is considered the knowledge transfer highway in various countries. Every nation is working hard to upgrade its education system according to international standards. A quantitative research design was selected for the present study. A survey approach was used for the collection of data. The population of the study was all university teachers in district Bahawalpur, Punjab. The sample size consisted of 205 public and private university teachers and was approached via a systematic random sampling technique. A questionnaire was developed according to the objectives of the study and its reliability was assessed by Cronbach alpha, which was 0.88. It was observed that various factors influence the integration of computer-based technology in classrooms including availability, utility, teachers’ opinions, and anxiety towards computer-based technology.
Evaluation of short-term wind predictability

Short-term wind predictability is the ability to foresee hourly wind energy one or several days in advance. The problem is addressed in general and the focus is on the form in which the predictability information should be given, which power models should be selected, and how to formulate the problem in a convenient perspective and approach its solution. A theory is developed to provide the basis for a quantification of the value of predictability. The concept of operational planning capacity is introduced together with some definitions and derived results. Based on these results, an algorithm to quantify the value of predictability is proposed. Numerical results illustrate the various steps of the algorithm. >
The Validation and Reliability of the Food and Health Questionnaire to Assess Health and Nutrition Knowledge

Purpose: This study aimed to translate and test the content validity and reliability of an English questionnaire used in the American food and health survey. Methods: The questionnaire was developed using 6 stages, then examined for test–retest. A total of 672 participants were recruited for validation and reliability. Validity test was performed using a correlation coefficient to measure the linear correlation between 2 questions at one given time. Moreover, the Kaiser-Meyer-Olkin, Measure of Sampling Adequacy, and Bartlett’s Test of Sphericity were performed to statistically determine the suitability for conducting exploratory factor analysis. Furthermore, reliability tests using Cronbach α was used to estimate the reliability coefficient properties of the translated scale. Finally, the most important correlated questions was plotted using a color-coded correlogram. Results: The test–retest reliability of all tested items was significantly correlated. The reliability test for all questions was 0.9. The cross-correlation test showed that all questions of the translated questionnaire were correlated significantly (P < .05) indicating reliability of the questionnaire. Conclusion: The tested questionnaire is applicable and may be used in population-based studies to raise awareness regarding health, food consumption, nutrition, and food safety among people in Jordan and/or other Arab countries.
The semiconductor laser beyond the locking range of optical injection

The voltage of a current-driven optically injected semiconductor laser has been measured. The experiments not only show the well known phenomenon of injection locking but also reveal unprecedented dispersive-like structures around the relaxation oscillation frequencies. Based on the single-mode rate equations a theoretical explanation of both phenomena is given. The dispersive-like structures are shown to be caused by four wave mixing.
Electromagnetic Interference in Silicon Carbide DC-DC Converters

A comparison of radiated noise for Silicon and Silicon Carbide converters is presented. SiC JBS diodes were used in this evaluation to enable fast switching times, whilst minimizing the transistor junction temperature. Radiated electromagnetic-interference measurements showed the highest noise signature for the SiC JFET and lowest for the SiC MOSFET. The negative gate voltage requirement of the SiC MOSFET introduces up to 6 dBµV increase in radiated noise, due to the induced current in the high frequency resonant stray loop in the negative power plane of the gate drive. The SiC JFET and MOSFET have shown overall converter efficiencies of 96% and 95.5% respectively. This efficiency shows only a weak frequency dependence, in contrast to the CoolMOS/SiC JBS diode combination which demonstrated an efficiency drop from 95% to 92.5% when increasing the frequency from 100kHz to 250kHz.
Evaluación de la producción de carne de ganado criollo patagónico Evaluation of Criollo Patagónico (Native Patagonian breed) cattle meat production

Objective. Evaluate the production of meat from the Criollo Patagonico cattle with resect to Angus and the cross breading between these two breeds. Materials and methods. A sample of 42 animals of the following cattle genotypes was used: Criollo Patagonico, Angus and the cross breed between these two breeds, classified in steers or heifers, finished in feedlot for a period of 114 and 156 days, after which eight groups of unbalanced analysis were formed. A factorial analysis was used during the exploratory stage. Linear mixed models were used to see the correlations between measurements on the same animal. Results. The findings suggest differences between the means of slaughter weights of the two fattening periods as well a the fact that this weight gain was deposited in the cuts of less commercial value. Regarding the productivity of cuts of high economic value, interaction was detected between them and the groups, allowing for an identification of differences amongst the groups in the case of some of the cuts. Conclusions. In virtue of the obtained results, the production of Criollo Patagonico cattle meat is considered promising in relation to the productivity of the high economic value cuts, as their average yields were only surpassed in “bife ancho” in its cross with Angus.
IV-CACCELERATED WEATHERING OF FIRE-RETARDANT-TREATED WOOD FOR FIRE TESTING

Fire-retardant-treated products for exterior applications must be subjected to actual or a ccelerated weathering prior to fire testing. For fire-retardant-treated wood, the two accelerated weathering methods have been Method A and B of ASTM D 2898. The rain test is Method A of ASTM D 2898. Method B includes exposures to ultraviolet (UV) sunlamps in addition to water sprays. D 2898 was recently revised to include Methods C and D. Method C is the “amended rain test” described in the acceptance criteria for classified wood roof systems (AC107) of the ICC Evaluation Service, Inc. Method D is the alternative rain test described in ASTM E 108 for roof coverings. Issues with the current methods are the limited availability of the UV sunlamps specified in the standard and the large amount of water used that may require special disposal.