Effect of Rainfall on Digital/Analog Television Signals

Rainfall has a strong negative impact on television (TV) signals, most especially at the receivers’ end. This is due to the propagation effect caused by absorption of the wave signal by atmospheric rain. Television signals may reach the TV receiver unstable due to interferences caused by heavy rainfall which creates undesirable poor-quality reception, and noise. The effect of rain induced attenuation on television signal reception is not enviable especially when it is heavy. Consequently, the aim of this work is to analyze the correlation between received signal strength, and frequency of transmission during rainfall. To achieve this aim, the received signal strength measurements and rainfall data were collected concurrently during dry days and rainy days. These readings were taken with a signal strength meter and some other mobile phone softwares such as (rain-gauge app, compass etc.). Results obtained show that rainfall leads to a noticeable degradation in the quality of received signals. Specifically, the data obtained were simulated and it was observed that attenuations increase sharply as rain rate increases. In particular, when the frequency is about 1080 GHz and the wavelength is low, there tends to be a disturbance between the drop of rain fall which causes attenuation resulting in a low signal strength. To conclude, this work proposes possible solution favorable to all television subscribers during rainfall

User-Centered Design-Based Approach in Scheduling Management Application Design and Development

The process of manually making and setting course schedules using Microsoft Excel is ineffective, time-consuming, and still prone to errors. This research develops a website-based scheduling management application with a case study at SMK Pariwisata Margarana so that it can solve scheduling problems manually. The UserCentered Design (UCD) method is applied in the application prototype design stage. Open interviews, field observations, simulations, and questionnaires were used as research data collection methods. Three iterations were carried out at the prototype design stage to fulfill all user needs. The high-fidelity prototype in the last iteration is then implemented into an application. Application quality is measured using ISO/IEC 25010 with five characteristics. The test results on usability characteristics show that the scheduling management application obtains an average usability score of 91.2%. The appropriateness recognizability sub-characteristic obtained the highest usability score of 93.53%. UCD can help produce an application that can meet all the user’s needs when implemented in the application design phase

The Relation Among Business Process Orientation Practices in Influencing Organizational Performance

Organizations always look for ways to improve their performance to survive in the business environment. One way to improve organizational performance is to improve business process orientation (BPO). Several studies identified practices that can be implemented and significantly impact an organization’s BPO maturity. These practices are called Critical Practices (CPs) strategic view, process definition and documentation, process measurement and management, organizational process structure, people management, process organizational culture, market orientation, supplier view, and information technology. However, most studies treat CPs independently, and the relationship between CPs and between CPs with organizational performance has not been addressed. This study tests and confirms the relationship between CPs, BPO, and organizational performance. Based on the literature, a structural model of the relationship between CPs and organizational performance is developed. An online questionnaire is designed to collect data from various organizations in Indonesia. The survey results are analyzed using Structural Equation Modeling (SEM) to investigate the relationship between variables. Most hypothesized relationships between CPs are confirmed except the relationship between supplier practices (SU) and culture (CT), which are not supported. Not all practices affect organizational performance directly, but they must be mediated by other practices to have a significant effect. The results suggest that to improve organizational performance, an organization needs to improve the practice of strategic view (SV), performance measurement (PM), customer (CU), process definition (PD), and information technology (IT)

Project Delay Risk Assessment

Maintenance activities on power plant projects, which are located in remote areas, are prone to risks related to project delay due to the high complexity of work and limited completion time. This research aimed to fill the existing research gap by developing a delay risk assessment of those projects using a probability impact matrix, which is then transformed into a fuzzy set theory. A case study has been undertaken to represent this research topic at three PLTMGs in Nusa Tenggara. The research steps were potential delay risks identification, critical risk assessment, and risk response development. The results show that the critical risks are lack of skilled and experienced manpower, delay in material and equipment delivery, poor communication and coordination between the contractor and the client, unavailability of materials in the local market, and incomplete material received. Several risk responses are provided in this research, such as strengthening the qualification of the job vacancy, having regular training or sharing sessions before the project execution, and having a stock of emergency spare parts in the central warehouse

Data Quality Management Strategy To Improve Remote Sensing Data Quality: A Case Study On National Remote Sensing Data Bank

National Remote Sensing Data Bank (Bank Data Penginderaan Jauh Nasional; BDPJN) is the operational implementer in the field of remote sensing to meet the needs of national data on remote sensing images. Remote sensing images are essential in the Indonesian government for various needs, such as in regional (spatial planning, city boundaries), disaster (forest fires, floods, landslides, earthquakes, volcanic eruptions), plantation, natural resources, and environment sectors. Quality management of BDPJN’s satellite images becomes challenging due to the increasing number of products owned and users annually. For this reason, a data quality management strategy is needed to guarantee and improve the quality of BDPJN data. To develop such a strategy, an assessment of the maturity of BDPJN’s data quality man- agement was conducted from the aspect of data processing by implementing Loshin’s Data Quality Management Maturity Model (DQM3) to find out the characteristics that were lacking. The results were then mapped based on Data Quality Management (DQM) activities in DAMA-DMBOK as a recommendation for data quality management strategies. This study applies quantitative research where data collection was done by distributing questionnaires to 24 respondents who are data stewards of medium, high, and very high-resolution mosaic images. Based on the assessment, BDPJN is in the maturity level of Defined to Managed. The recommendations are 21 DQM activities that can be carried out to improve BDPJN data quality

Probabilistic Scheduling Based On Hybrid Bayesian Network–Program Evaluation Review Technique,

Project scheduling based on probabilistic methods commonly uses the Program Evaluation Review Technique (PERT). However, practitioners do not widely utilize PERT-based scheduling due to the difficulty in obtaining historical data for similar projects. PERT has several drawbacks, such as the inability to update activity dura- tions in real time. In reality, changes in project conditions related to resources have a highly dynamic nature. The availability of materials, fluctuating labor productiv- ity, and equipment significantly determine the project completion time. This research aims to propose a probabilistic scheduling model based on the Hybrid Bayesian Network-PERT. This model combines PERT with Bayesian Network (BN). BN is used to accommodate real-time changes in resource conditions. The modeling of BN diagrams and variables is obtained through an in-depth literature review, direct field observations, and distributing questionnaires to experts in project scheduling. The model is validated by applying the proposed model to a 60 m concrete bridge construction project in Indonesia. The simulation results of the proposed model are then compared with the case study project to assess the model’s accuracy. The result of the study shows that the proposed hybrid Bayesian-PERT model is accurate and can eliminate the weaknesses of the PERT method. Besides being able to provide an accurate prediction of project completion time (93.4%), this model can also be updated in real-time according to the actual condition of the projec

Deposition Silver Based Thin Film on Stainless Steel 316l as Antimicrobial Agent Using Electrophoretic Deposition Method

SUS316L stainless steel has been widely used in medical applications. However, some germs frequently adhere to the device surface, resulting in infections following implantation surgery. Unfortunately, the material lacks antibacterial characteristics that prevent microorganisms from adhering to the surface. This study aims to use electrophoretic deposition to deposit chitosan/silver (Ag) as an antibacterial agent on stainless steel 316L. The antimicrobial effects of chitosan and silver are well established. During the deposition, the rectifier voltage was adjusted to a constant 10 volts with a suspension pH range of 2.7 to 5.1. The effect of varying the pH of the suspension on the physical, mechanical, and antibacterial properties of chitosan/Ag thin films was investigated. The materials’ structure and morphology were studied using X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier- transform infrared spectroscopy (FTIR). The antimicrobial inhibition was examined using the Kirby-Bauer antimicrobial test. The results reveal that increasing the pH of the suspension causes an increase in the thickness, size, and aggregation of the chitosan/Ag thin film. The highest thickness achieved during deposition with a pH 5.1 suspension is 5.265 m. The best antibacterial agent is achieved at a pH 3.5 suspension sample with an inhibitory zone diameter of 4 m

Evaluation Of Dehydration Performance Of Belitung Taro (Xanthosoma Sagittifolium) Using Tray Dryer

Belitung Taro (Xanthosoma sagittifolium) is a plant that can be processed into various food products. The high-water content of taro and the lack of a precise drying system made this material easy to rot. This study aims to evaluate the dehydration performance of tray dryers to reduce the water content of Belitung Taro. The independent variables used were air velocity (3-6 m/s), taro thickness (1-4 mm), and drying time (30-120 min). The results showed that the optimum drying time of taro is 30 min. The dryer airflow of 5 m/s significantly reduces the water content. The thickness of the slices positively affects the drying rate. The lowest water content was obtained in drying with a thickness of 1 mm. The ANOVA results show the effect of thickness, time, and flow rate variations on the drying rate. Three types of mathematical modeling are used to estimate moisture content: Newton, Page, and Modified Page. The Modified Page equation was preferred to detect the moisture content of the taro. From this study, the optimum condition of the tray dryer can be the best solution to dehydrate Belitung Taro effectively and efficientl

Epidemiology and Characteristics of Resistant Typhoidal Salmonella Strains Prevalent in Lafia, Nigeria

Resistance to antibiotics by pathogens is a burden to disease management. The study characterized Salmonella species in patients with fever and determined their antibiotic susceptibility patterns in Dalhatu Araf Specialist Hospital Lafia, Nigeria. Faecal samples were collected from 400 patients, and Salmonella species were isolated. The isolates were rested against ten antibiotics to determine their multi-drug and extensively drug-resistant capabilities, after which molecular characterization was done. Male patients between the ages of 21 to 30 years had the highest prevalence of 17(44.7%) of the pathogen, and they were the most susceptible among those who regularly drank water from boreholes (19(50.0%)). Augmentin with 44(73.0%) Salmonella susceptibility was the most effective antibiotic, while gentamycin, ampicillin, chloramphenicol, and cotrimoxazole had the isolates obtaining resistance of 60(100%), 59(98.0%), 57(95.0%), and 56(93.4%) respectively. Only six of the 60 Salmonella isolates were not multidrug-resistant, while 25 were extensively drugresistant. Isolates S9 and S25 with staG genes were the only Salmonella typhi found in the study; others with ttr genes were of the Salmonella genera. The study concludes that the first-line antibiotics administered to patients with typhoid fever are no longer effective; hence, proactive measures should be put in place to surmount the observed challenge

Framework Analysis Using The Rapid Evidence Assessment (REA) Method in Human Resources Information System Development

The framework application in the first phase of the Human Resources Information System (HRIS) development at X Company, which is a mining company, has so far been considered to have encountered many problems, with bugs and defects frequently being found that occurred when the project was deployed to a production environment. This happens due to frequent changes in project requirements in the middle of the development process, so many features become less relevant to business systems. So making decisions quickly and precisely before the first phase ends is necessary. The Rapid Evidence Assessment (REA) method was taken because it is a rapid review, which only a few weeks can decide based on field objective evidence. The use of a questionnaire involving project members was compared with the literature review results, namely that five aspects affected the time to develop: organizational aspects, process aspects, project aspects, people aspects, and technical aspects. The Scrum framework is a framework that is much more relevant to the current project conditions, with 3.6-point results and 3.1 points for the waterfall