International Journal of Physical Sciences and Engineering <p style="text-align: justify;"><strong>IJPSE</strong>&nbsp;is published in English and it is open to authors around the world regardless of the nationality. It is currently published three times a year, i.e. in&nbsp;<em>April</em>,&nbsp;<em>August</em>, and&nbsp;<em>December</em>.&nbsp;&nbsp;</p> en-US (Prof. Joan Manuel Rodríguez Diaz, Ph.D.) (Vedran Vucic) Thu, 13 Sep 2018 10:54:40 +0000 OJS 60 Utilizing turbine ventilator as supplier of electrical energy resources for home information <div style="text-align: justify;">The power plant has been created with turbine ventilator as a source of electrical energy for lighting. Voltage generator generated when wind speed between 0 m/s up to 6 m/s with no given load is between 0 volts up to 8.38 volts. Generator-generated electricity can be utilized in everyday life after going through several processes like converting the voltage from DC to AC by using a DC to AC inverter and increasing the AC voltage to a 220-volt voltage using a transformer. In this study using 5 watts LED lamp that can be used to help to light.</div> I Wayan Supardi, Komang Ngurah Suarbawa, I Made Satriya Wibawa, Made Padmika, Ni Wayan Dewi Mahayani, I Wayan Wisnawa Saputra ##submission.copyrightStatement## Mon, 28 May 2018 16:28:58 +0000 Drills forehand training strategy on the stroke of forehand drive ability in tennis <p style="text-align: justify;">This article describes the effect of training strategy on forehand drills and arm strength on the ability of a forehand drive stroke on tennis. Operationally, the purpose of this research is to know the interaction between forehand drills training strategy and arm strength to the ability of forehand drive on the playing of tennis by observing reality of tennis training pattern of students in Department of Physical Health and Recreational Education, Faculty of Teacher Training and Education, Halu Oleo University who programmed a Tennis course in 2018th even semester. Overall this article attempts to describe its analysis by looking at four main factors that control the path of an object that is being struck through the theories: (1) the speed of hitting the object, (2) the angle at which the power of the object, (3) the force of gravity affecting the object that is being hit, and (4) the effect of aerodynamic power. The technique of analysis that is used in this article is by observing the strength factor of the basic ability of physical condition. In which, the power component is also one of the biometric components that have contributions in improving the components of the overall physical condition.</p> La Sawali ##submission.copyrightStatement## Tue, 19 Jun 2018 14:27:52 +0000 Flow of guineal river within the framework of local energy development <p style="text-align: justify;">Although currently, more than 70% of the energy generated in Ecuador is of hydraulic origin, in the province of Manabí the source of basic generation is still thermal, with a high cost of kWh generated and with high rates of CO2 emissions to the atmosphere. However, in the territory of the province, several rivers can provide potential water energy that has could use in the generation of electricity. The work shows the results of the analysis of the Guineal River's energy potential, which has was carried out by applying the study of the river flow in 18 sampling points that are close to rural communities where the quality of the electric service has deficiencies. The results obtained were presented in tables that have can be used to generate projects aimed at introducing electricity generation technology, constituting a local development solution to the energy problem.</p> Jose Andres Rengifo Pinargote, Miryan Elizabeth Duartez Velez, Carlos Gustavo Villacreses Viteri, Vazquez Perez Antonio ##submission.copyrightStatement## Sat, 30 Jun 2018 08:04:27 +0000 Attitudes toward the use of internet for students <p style="text-align: justify;">In this era, the internet has become the main media utilized by many people. In Indonesia, teenagers use the internet to find some information related to school, work, and lifestyle. The Internet makes a range of distance and time is no longer an obstacle in obtaining information. It can be accessed in every place and every time. However, if the teenagers do not use the internet wisely or they use it to find some negative contents on websites, it will result in negative impacts on them. This study aimed at investigating some attitudes toward the use of the internet for students. The samples of the study were students in SMA N 1 Kediri. The method used was a survey by asking the students to fill out a questionnaire. The findings show that most of the students give a positive attitude toward the use of the internet for students. Most of them argue that crimes will be decreased if the students used the internet wisely. Also, there will be many creative ideas initiated by students for the development of this country.&nbsp;&nbsp; &nbsp;</p> I Wayan Suryasa, I Gede Putu Adhitya Prayoga, I Wayan Astu Werdistira ##submission.copyrightStatement## Sat, 07 Jul 2018 13:11:16 +0000 Energy interpretation of solar radiation affects for Artemisa province <p style="text-align: justify;">Solar energy is one of the renewable sources with the best prospects for the future, which can have used directly in two fundamental ways: thermal energy and photovoltaic solar energy. Photovoltaic systems are a viable alternative to diversify the energy base worldwide, being able to inject electrical energy into the grid. The work shows the study of the energy interpretation of solar radiation that affects the province of Artemisa, for its possible use in the generation of electricity, based on the introduction of photovoltaic systems connected to the electricity grid. A theoretical analysis is made about the solar potential and the influence of the climatic variables in the use of it, the territory of the Artemisa province is characterized, where the solar radiation for the generation of electricity is valued, the energy impact is evaluated. Derives from the use of solar radiation that affects the territory to generate electrical energy.</p> Alixandra Perez Noa, Antonio Vazquez Perez, Javier Moreno Hechavarria, Raynel Diaz Santos ##submission.copyrightStatement## Thu, 12 Jul 2018 14:00:43 +0000 Comparison of studies through laboratory tests to loan material (ballast) of San Jose and AGRE S.A. quarries treated with asphalt emulsion or cement <p style="text-align: justify;">In the construction of pavement, structures are determined by granular materials treated with asphalt emulsion in the pavements, in the structure of the pavements is very common to find unsuitable materials which generate both in the constructive and economic environment various types of inconveniences. The pavement structures are made up of different layers, each of which fulfills a certain function. The treatment of the material helps to reduce the cost of the pavement structures, obtaining improvements in their behavior and economic results in the construction of the same. What is intended in this research is the treatment of the selected material combined with asphalt emulsion, therefore, that can be used both as a base or sub-base within the pavement structures. For the analysis of the behavior of the selected material, the San José and AGRE S.A quarries were taken, in order to determine their own characteristic variants and thus demonstrate whether stated material meets the technical specifications for incorporation in the construction of the pavement structures.</p> Maria Isabel Zambrano Meza, Edwin Alexander Rodriguez Veliz, Cesar Augusto Veliz Mendoza, Ricardo Andres Cedeno Delgado, Gema Flores Ormaza ##submission.copyrightStatement## Wed, 25 Jul 2018 00:00:00 +0000 Aquifers selection based on geoelectric method data in the framework of drilling wells <p style="text-align: justify;">The selection of aquifers based on Geoelectric Method data in constructing drilling wells was discussed in the present study. The research was conducted at the International Hospital Project in Nyitdah Tabanan Bali. The research position was around 8,5736 LS 115,1215 LE. Before the study was conducted, a well drill (well 1) has been made. The results showed that there were two types of aquifers, namely unconfined aquifers and unconfined aquifers. Related to this study, well 1 took water in the unconfined aquifers of 4 m depth. If the water kept taken for a long period, the quality and quantity of the water would be worse since well 1 was unconfined aquifers that took surface water. This would adversely affect the hospital building being built. The land around the building would be hollow due to the water loss, and the building would become unstable. Another drill well (well 2), based on geoelectricity data, can be made on 5,25 m - 18,75 m. In-depth 23 m, it was suspected that unconfined aquifers would have been found in well 2. After being drilled, aquifers were found in 23 m depth. Drilling was kept doing to 55 m depth.</p> I Nengah Simpen, I Wayan Redana, Ika Umratul ##submission.copyrightStatement## Sat, 28 Jul 2018 16:52:18 +0000 Ballast treated with asphalt emulsion, Megarok and San Jose. AASTHO standards <p style="text-align: justify;">In the research work, the results obtained at the laboratory level of the lending material (ballast) treated with asphalt emulsion from the quarries "Megarok and San José" are compared, applying the AASTHO standards. The quarries are located in the Picoazá-La Sequita parish of the Portoviejo canton. Samples from both quarries were evaluated in the laboratory and it was possible to carry out tests of natural humidity, Atterberg, granulometric, compaction, and soil bearing capacity (CBR). Based on the results obtained, they were compared by disclosing which of the quarries meets the appropriate conditions within the construction standards and techniques, in order to stabilize the material with asphalt emulsion; in addition to comparing it with the specifications of the AASTHO standards and the MTOP standard. The result was that the materials extracted from the quarries do not meet the technical specifications; but when mixed with the asphalt emulsion, the Megarok material fulfills as type A base.</p> Maria Isabel Zambrano Meza, Edwin Alexander Rodriguez Veliz, Bethsy Anchundia Anchundia, Gema Cayetano Lucas, Gema Flores Ormaza ##submission.copyrightStatement## Mon, 06 Aug 2018 00:00:00 +0000 Design, construction, and energy of sustainable solar dryers in Jipijapa Canton <p style="text-align: justify;">Solar energy is one of the sources of renewable energy and more dispersed in the territory, this can be implemented for different energy uses for being a clean energy and that can be sustainable over time, the canton Jipijapa presents an annual radiation of 4.8 kWh/m2 day. In Cerro Grande community located in this area is located 529 meters above sea level, its inhabitants are engaged in agriculture, specifically the revival of the production of quality coffee for its taste and aroma. The drying treatment was not adequate, so their prices have dropped in the national and international market, with the aim of achieving a drying quality of this product and from knowing that the bamboo cane (Angustifolia Kunt) was a resource with good energy properties, two dryers were designed that take advantage of direct and indirect solar energy, to compare which was the most suitable for drying the coffee bean in a cleaner and simpler way. The results obtained in its design, construction and evolution determined that these types of drier can be implemented in communities that have the conditions of natural renewable resources and needs to improve the drying conditions of different agricultural products, thereby supporting the energetic and social sustainability of the populations that live in rural areas and that today are the base of the sustenance of agricultural products such as coffee, cocoa, and others.</p> Alfredo Cecilio Zambrano Rodriguez, Maria Rodriguez Gamez, Luis Garcia Faure ##submission.copyrightStatement## Sat, 18 Aug 2018 04:42:43 +0000 Development and optimization of the ratio vegetation index on the visible and infrared spectrum <p style="text-align: justify;">This study aims to find a suitable vegetation index model to analyze the distribution of clove vegetation in Buleleng regency, Bali. Vegetation index model Ratio Vegetation Index (RVI) extracted from Landsat 8 was developed in the visible spectrum (l = 0.450 - 0.680 ?m) and infrared (l = 0.845 - 2.300 ?m). Development methods are carried out on the basis of the spectral reflectance response characteristics of the dominant electromagnetic waves from the visible and infrared spectra of vegetation. Created a multiple regression relationship results from scattergram that links RVI vegetation index with band 3 = B3, band 5 = B5, band 6 = B6, and band 7 = B7. Optimization strategy is carried out by dividing the development of RVI with a variable number factor. There are 4 forms of RVI vegetation index models from the development and optimization of the visible and infrared spectra. Of the 4 new vegetation index forms, which provide optimal results and close to extensive data from the Forestry and Plantation Service, Buleleng regency, Bali is RVI<em><sub>new4</sub></em> = 0.0022 + 0.00142 * B3 + 0.00028 * B5 + 0.00054 * B6 + 0.00096 * B7. The area produced by this vegetation index model in analyzing the distribution of clove vegetation is 7667.82 ha. Is this area 99.40% of the average data area? the Forestry and Plantation Service, Buleleng regency, Bali in 2014, which is 7622.32 ha. The dominant distribution of clove vegetation is in the rare category with an area of 7441.74 ha.</p> I Made Yuliara, Gusti Ngurah Sutapa, Gde Antha Kasmawan ##submission.copyrightStatement## Mon, 20 Aug 2018 00:00:00 +0000 The concentration of radon gas in air-conditioned indoor <p style="text-align: justify;">Research has been conducted on the concentration of radon gas in air quality in air-conditioned rooms that can increase the potential for lung cancer. Indoor air quality is influenced by factors such as room occupants, material buildings, equipment and furniture in the room, contamination of pollutants from the outdoor air, seasonal influences, lighting, temperature, humidity, indoor noise, and ventilation. In addition, indoor air quality can be affected by radon gas. The concentration of radon gas is relatively high compared to other natural radionuclides. It is estimated that around 55% of the radionuclide concentration in nature comes from radon gas and is the largest source of radiation received by the world population, which is around 1.3 mSv/year. Based on the Risert of the National Institute of Occupational Health and Safety (NIOSH), America in 1997 as many as 52% of respiratory diseases associated with sick building syndrome stemmed from a lack of ventilation in the room and poor AC room performance, thus increasing the potential for lung cancer. The method used in this study is to determine the physical quantity and concentration of the radiation dose of radon gas in the room. The results show that air quality in terms of temperature, humidity, and noise is significantly still in compliance with environmental health requirements according to Kepmenkes No. 1405/Menkes/SK/XI/2002. But the lighting in the room has not been significantly fulfilled. Rooms with gypsum ceilings increase radiation doses and air-conditioned rooms can accumulate radiation doses evenly in the room.</p> I Gusti Agung Ayu Ratnawati, Gusti Ngurah Sutapa, Ni Nyoman Ratini ##submission.copyrightStatement## Tue, 21 Aug 2018 05:32:41 +0000