Miracle-dz/UniFAR-FTUs huggingface dataset:
The Emergence of Knowledge-Based Technologies in Promoting Knowledge Sharing Behavior

This article addresses the emergence of knowledge-based technologies and its focus is on factors that stimulate the successful of knowledge sharing behavior. People nowadays are utilizing knowledge-based and web-based technology, such as Internet, Intranet, social media and other online technology for interaction and collaboration. These are the platforms through which knowledge can be extracted, shared and distributed around the globe and people are starting to communicate and socialize using the latest media and technology. Literature on knowledge sharing and virtual mode suggest the pre-existence of shared knowledge or a shared belief system as a condition for the knowledge-based technologies to emerge. The objective of this study is to analyze the role of these knowledge-based technologies to promote the knowledge sharing behavior. This research uses quantitative methodology for the collection and analysis of data by conducting surveys from the researchers in these organizations. Self-administered questionnaire were distributed to 510 researchers from selected Malaysian Government-Linked Companies (GLCs). The theoretical model developed in this paper is empirically tested on a sample of researchers of five organizations, and significant relationships among these constructs were found. Conclusions and directions for future research are also formulated.
Development of highly stable BOTDR strain sensor employing microwave heterodyne detection and tunable electric oscillator

We successfully developed a new Brillouin-OTDR (BOTDR) that is highly stable in the face of surrounding temperature fluctuations it by employing a microwave heterodyne receiver and a tunable electric oscillator. We were able to realize good frequency and power stability because the BOTDR only pulse-modulates the probe light launched into the sensing fiber. The design is optimized to detect cracks that occur in concrete structures by measuring the strain in a sensing fiber fixed to the concrete structure at a certain level. We demonstrated that the BOTDR could measure the strain in a 10 km long sensing fiber to an accuracy of 10 (mu) (epsilon) (corresponding to 0.5 K in temperature) with an optimum spatial resolution of 20 ns. This accuracy is sufficient given the required strain of 50 (mu) (epsilon) for crack detection. In addition, the BOTDR strain deviation caused by temperature fluctuation was less than several (mu) (epsilon) . The simple design of the BOTDR meant that the measurement time could be reduced to 170 sec.
People’s Voices on the Sustainable Forest Reform in the Democratic Republic of Congo

Since the early 2000s, the Democratic Republic of Congo has been conducting a reform of its forestry sector with the publication of The Forest Code (2002). The implementation of this law, which aims to assure the participation of all stakeholders, has been evolving slowly since then. The present research aims to evaluate the knowledge local communities and indigenous people detain over the ongoing reform, and the expectations they created when negotiations over the implementation of industrial harvesting activities in their traditional territories began. By interviewing local people, we came to understand that insufficient knowledge regardin the law gathers with a lack of concern towards ecological or environmental matters and with the need of seeing basic needs satisfied; all this in a context in which different stakeholders’ responsibilities and negotiational terms are often misunderstood.
Thermal Analysis of the Transient Temperatures Arising at the Contact Spots of Two Sliding Surfaces

The three-dimensional hyperbolic heat conduction equation is solved to obtain the analytical solution of the temperature rise at the contact area between an asperity and a moving smooth flat. The present analyses can provide an efficient method to avoid the problem of being difficult to give the correct boundary conditions for the frictional heat conduction at an asperity. The mean contact area of an asperity which is needed in the heat transfer analysis is here obtained by a new fractal model. This fractal model is established from the findings of the size distribution functions developed for surface asperities operating at the elastic, elastoplastic and fully plastic regimes. The expression of the temperature rise parameter T/f (T: Temperature rise. f: friction coefficient) is thus derived without specifying the deformation style of a contact load. It can be applied to predict the T/f variations due to the continuous generations of the frictional heat flow rate in a period of time. The combination of a small fractal dimension and a large topothesy of a surface is apt to raise the contact load, and thus resulting in a large T/f value. A significant difference in the behavior exhibited in the parameters of temperature rise and temperature rise gradient is present between the Fourier and hyperbolic heat conductions; Fluctuations in the thermal parameters are exhibited only when the specimen material has a large value of the relaxation time parameter.
Analysis and experiment of substrate integrated waveguide cavity of four sidewalls of cylinders and solid top and bottom walls

Given in this paper are the equivalence formulas to convert the substrate integrated rectangular waveguide (SIW) resonant cavity of cylinder sidewalls (and solid top- and bottom-walls) to its equivalent rectangular wavguide cavity of solid sidewalls. The equivalence is analytical, therefore it should be excellent as long as the radius of the cylinders and their separation are small in terms of wavelength. Two prototypes are fabricated to demonstrate the validity of the equivalence formula. Excellent agreement of the measured and analytical resonant frequencies of TE101 mode has been observed in the substrate integrated rectangular waveguide resonant cavity, indicating the accuracy of the proposed equivalence theory. Such equivalences are convenient for the design of small waveguides, of millimeter wave, in a multilayer circuit structure, such as the LTCC.
Kinesiological factors in vertical jump performance: Differences within individuals

The purpose of this study was to examine the changes in both the coordination patterns of segmental actions and the dynamics of vertical jumping that accompany changes in vertical jump performance (VJP) occurring from trial to trial in single subjects. Ground reaction forces and video data were analyzed for 50 maximal vertical jumps for 8 subjects. It was possible to predict VJP from whole-body or even segmental kinematics and kinetics in spite of the small jump performance variability. Best whole-body models included peak and average mechanical power, propulsion time, and peak negative impulse. Best segmental models included coordination variables and a few joint torques and powers. Contrary to expectations, VJP was lower for trials with a proximal-to-distal sequence of joint reversals.
Demand- and supply-side factors affecting utilisation and provision of maternal health services under the free maternal health care policy in one municipality in Northern Ghana

BackgroundA free maternal health care policy was introduced in Ghana in 2008 to cater for the health needs of pregnant women for the reduction of maternal deaths. Experiences from other regions and countries show that demand- and supply-side factors often affect the success of such policies although this is unknown in this context. The study aimed to assess demand- and supply-side factors affecting the utilisation and provision of services during pregnancy under the policy. MethodsA convergent parallel mixed methods study was undertaken, collecting quantitative and qualitative data. The study was carried out in the Kassena-Nankana East Municipality in Ghana. Questionnaire were used to collect data from women (n=406) who utilised services during pregnancy. Focus group discussions with women (n=10) and in-depth interviews with midwives and nurses (n=25) were also conducted. Quantitative data were analysed and presented using descriptive statistics. Qualitative data were audio-recorded, transcribed and coded using themes and sub-themes. ResultsBoth demand- and supply-side factors impacted the use and provision of services. Distance and time to facilities challenged the use of services. Supply-side factors such as laboratory services, equipment, drugs and supplies were not adequately available. Antenatal, childbirth and postnatal services were carried out together in the same rooms at the community-based health planning and services (CHPS) compounds. Emergency transport was also unavailable for referral of emergencies. ConclusionDemand- and supply-side factors were reported to impede the use and provision of services. Government and stakeholders should prioritise building as well as expanding the infrastructure of CHPS compounds. Emergency transport for women should also be provided. These together may contribute to improving the use and provision of services, leading to a reduction in maternal deaths and achievement of universal health coverage.
Evaluation of the Ecological Benefits of Recycling Multiple Metals from Lithium Battery Saggars Based on Emergy Analysis

With the rapid development of China’s new energy industry, the use of lithium-ion batteries has increased sharply, and the demand for battery cathode metals such as nickel, cobalt, and manganese has also increased rapidly. Scrapped ceramic saggars that are used to produce the cathode materials of lithium-ion batteries contain large amounts of nickel, cobalt, and manganese compounds; thus, recycling these saggars has high economic value and ecological significance. In this paper, the emergy method is used to analyze the ecological benefits of the typical Ni–Co-containing saggar recycling process in China. This paper constructs an ecoefficiency evaluation index for industrial systems based on emergy analysis to analyze the recycling of nickel and cobalt saggars. The ecological benefits are analyzed, and the following conclusions are drawn. (1) The Ni–Co-containing saggar recycling production line has good economic and ecological benefits. (2) The process has room for improvement in the energy use efficiency and clean energy use of the crystallization process and the efficiency of chemical use in the cascade separation and purification process. This study also establishes a set of emergy analysis methods and indicator system for the evaluation of the ecological benefit of the recycling industry, which can provide a reference for the evaluation of the eco-economic benefit of similar recycling industry processes.
An Archaeological Curation-Needs Assessment for the US Army Corps of Engineers, Mobile District

Abstract : The report presents the findings of the St. Louis District's assessment of 16 repositories at 11 facilities in five states that are curating Mobile District archaeological collections. A total of 7,084 cubic feet of artifacts and 558 linear feet of associated documentation, and 901 human skeletal remains were examined. Repositories were assessed for the adequacy of their storage structures, maintenance of facilities, existence of environmental controls, security measures, protection from fire and water damage, and the current status of the collections. Research by the St. Louis District showed that only one of the 16 repositories approaches the standards of 36 CFR 79. Objects, human remains, and associated records were found, in large part, to be in abysmal condition. In order to correct these inadequacies, recommendations are made for facility improvements. A plan for safeguarding the collections is presented. In addition, a bibliography of the archaeological survey reports relevant to the collections is provided for each repository.
Effects of the augmented reality game Pokémon GO on fitness and fatness in secondary school students

Objective: The aim of this study was to analyse the effect of 8 weeks of Pokémon GO on physical fitness (cardiorespiratory fitness [CRF], Speed/Agility [S/A], and muscular strength [MS]) and fatness (body mass index [BMI], percentage of body fat [%BF], and waist-hip index), as well as possible differences between weekly physical activity (PA) levels, in Spanish adolescents between 12 and 15 years of age. Design, setting and method: Comparative design, with a control group (n = 86) that did not participate in Pokémon GO, and an intervention group (n = 78) which did so over an 8-week period. Age, sex, number of home computers, and maternal educational level were controlled for as possible confounding variables. Results: Results show that players walked a total of 52 km in 8 weeks. Moreover, they played the game for a mean of 40 min/day. Pokémon GO players showed improvements in CRF and BMI (p < .05). Inactive young people showed a 22.2% increase in CRF and an 11.3% decrease in their %BF compared to non-players. Despite these results, less than half of the participants considered that Pokémon GO had improved their overall fitness and felt more encouraged to engage in PA. Conclusion: Pokémon GO increased PA and CRF levels and decreased BMI and %BF after 8 weeks of practice independently of age, sex, number of computers at home, and maternal education. The Pokémon GO app could be used in school and family contexts to increase the daily amount of MVPA, improve CRF, and to take advantage of the effects of loss of body fat.
THREE DIMENSIONAL FLOW SIMULATIONS OVER A COMPLETE SATELLITE LAUNCHER WITH A CLUSTER CONFIGURATION

Aerodynamic flow simulations over the first Brazilian Satellite Launch Vehicle, VLS, during its first-stage flight are presented. The calculations use the Chimera technique together with block structured grids to discretize the computational domain. The current approach is based on the solution of the 3-D Euler equations in curvilinear coordinates. A finite difference method is applied to these equations and a centered spatial discretization is used. Artificial dissipation terms, based on a scalar, nonisotropic model, are added. The time march process is accomplished with a 5-stage, 2nd-order accurate, RungeKutta scheme. The results are validated using wind tunnel experimental data available for the VLS. The qualitative agreement between experimental and computational results is very good and it indicates that the flow simulation tool developed can be useful for aerodynamic analysis of launch vehicle configurations.
Sentiment Analysis on Twitter Data: Comparative Study on Different Approaches

Social media has become incredibly popular these days for communicating with friends and for sharing opinions. According to current statistics, almost 2.22 billion people use social media in 2016, which is roughly one third of the world population and three times of the entire population in Europe. In social media people share their likes, dislikes, opinions, interests, etc. so it is possible to know about a person’s thoughts about a specific topic from the shared data in social media. Since, twitter is one of the most popular social media in the world; it is a very good source for opinion mining and sentiment analysis about different topics. In this research, SVM with different kernel functions and Adaboost are experimented using CPD and Chi-square feature extraction techniques to explore the best sentiment classification model. The reported average accuracy of Adaboost for Chi-square and CPD are 70.2% and 66.9%. The SVM radial basis kernel and polynomial kernel with Chi-square n-grams reported average accuracy of 73.73% and 68.67% respectively. Among the performed experimentation, SVM sigmoid kernel with Chi-square n-grams provided the maximum accuracy that is 74.4%.
Estimation of Magnetizing Characteristics of Pole Transformers in Islanding Area

For the detection of islanding, it is very important to choose the threshold value for the change in the harmonic voltage. In this paper, we propose an analytical model of a pole transformer using a Fourier series and clarify the nonlinear magnetizing characteristics of the pole transformer in an islanding area. After determining the proposed model coefficients from the tests of the pole transformer excited by a sinusoidal voltage, distorted wave voltage tests were performed under conditions in which the third harmonic voltage or the fifth harmonic voltage was superimposed. The results of the testing showed that the magnetic properties vary greatly upon increasing the harmonic component of the voltage. The analytical and measurement results were in good agreement. By using the proposed method, the distributed generators (DGs) can estimate the magnetizing characteristics of the pole transformer by monitoring the connected terminal voltage. Thus, as an active signal for islanding detection, DGs can inject a harmonic current synchronized to the excitation current harmonics of the pole transformer into the distribution network. In the case of DGs equipped with the above functions, there is no need to change the settings of the islanding detection threshold for changes in the harmonic voltage even when there is a change in the excitation voltage or an increase in the number of DGs.
Optimization of Waterjet Propelled High Speed Ships - JHSS and Delft Catamatran

The present work focuses on the application of Simulation Based Design (SBD) for the resistance optimization of two waterjet propelled high-speed ships, namely, the Joint High Speed Sea-lift (JHSS) which is a monohull, and the Delft Catamaran (DC) at Fr=0.34 and 0.5, respectively. Design optimization has been performed for both the parent hull form and the waterjet inlets. The adopted SBD explores the concept of variable physics approach for the Delft catamaran which shows strong waterjet hull interaction effects. First a simplified CFD waterjet model is used to include the waterjet induced forces and moments during the bare hull Delft catamaran optimization. Next, the waterjet is appended to the optimized barehull and the inlet is optimized by detailed simulation of the duct flow. The bow shape optimization and waterjet inlet optimization of the JHSS were done independent of each other since waterjet hull interactions are weak, and the bow shape modification does not affect the local flow near the waterjet inlet. For JHSS, which has four side by side axial waterjets, the effect of combining the waterjet inlets on the powering performance was also explored. The design optimization yielded geometries with significant resistance reduction for both the JHSS and Delft catamaran. The final optimized Delft catamaran will be built and model tested to validate the SBD process.
Three‐pole cross‐coupled substrate‐integrated waveguide bandpass filters based on PCB process and multilayer LTCC technology

This letter presents the design, implementation and experiment of planar and multilayer three‐pole cross‐coupled bandpass filters realized by substrate‐integrated waveguide (SIW). The two three‐pole filters centered at 10 GHz with one transmission zero are simulated by using full‐wave electromagnetic (EM) simulator. Then they are fabricated with printed circuit board (PCB) process and with multilayer low‐temperature co‐fired ceramic (LTCC) technology, respectively. By the comparison between the two filters, it is easily seen that the multilayer SIW filter based on LTCC technology occupies a very small area while obtaining good performance. The measured results coincide with the simulated results very well and show the superiority of multilayer LTCC technology. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 71–73, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23972
A complete GPS/INS integration technique using GPS carrier phase measurements

For its synergistic relationship, the integrated GPS/INS system has been adopted in many navigation systems. In this paper, a complete GPS/INS integration technique utilizing GPS carrier phase measurements is proposed. A measurement model of double-differenced GPS carrier phase measurements is newly derived in order to be used with the INS error model. Also, an algorithm is suggested to resolve the integer ambiguities of GPS carrier phase measurements by employing MS information. From simulation results, performance of the suggested technique is verified.
Compact and broad-band three-dimensional MMIC balun

This paper presents a simple and effective technique which compensates for the amplitude and phase differences of the Marchand balun. Compensation is accomplished by interconnecting a short transmission line to a pair of couplers. As a result, Marchand balun with operation frequency ranging as wide as 8.2-30 GHz is achieved. To fabricate the prototype, we adopt three-dimensional monolithic-microwave integrated-circuit technology together with a 2.5 /spl mu/m/spl times/4 layer polyimide structure stacked over a GaAs wafer. The topology yields a circuit area as small as 0.2 mm/spl times/0.4 mm for the balun.
Effectiveness of a holistic neuropsychological rehabilitation program using virtual reality

Acquired brain injury (ABI) is associated with severe functional consequences at several levels: personal, psychological, social, physical, economic, and systemic. The main objective of the present study is to show the potential of applying virtual reality (VR) in neuropsychological rehabilitation and the consequent psychological and cognitive improvement of the person with ABI. A total of 27 participants of both sexes with moderate or severe ABI participated in an investigation in a clinical trial-type design with pre-test and post-test. Participants in the experimental group (n = 8) underwent a remote holistic neuropsychological intervention program supported by a VR platform: the Virtual Centre for the Rehabilitation of Road Accident Victims (VICERAVI). The experimental group results were compared with a first control group (n = 10) that underwent a conventional holistic neuropsychological intervention face-to-face program; and with a second control group that did not have any neuropsychological intervention (n = 9). We conclude that the VR-based neuropsychological rehabilitation program (NRP) at a distance produces better cognitive results in general cognitive functioning, learning, memory, and executive functioning than the conventional face-to-face NRP. Still, at the psychosocial level, the conventional NRP obtained results similar to those of the VR-based NRP, which did not produce significant improvements. Thus, the study results suggest that the development of VR-based holistic NRPs may benefit the autonomy of people with ABI.
Stability and control of inductively coupled power transfer systems

Inductively coupled power transmission (ICPT) is becoming an accepted technique for transferring power from an extended loop (track) to a number of galvanically isolated movable pickup coils. Operation of ICPT systems is discussed and limiting factors in their operation are investigated. In particular, the control of multiple pick-up coils and the number of such pick-ups that may be used before the system becomes unstable is investigated. These theoretical developments are compared with practical measurements from a prototype ICPT system.