With the advancement in diagnostic imaging, providing shielding against X-rays has become a significant concern. While Lead has been extensively used as the shielding material, it is costly and toxic to humans and the surrounding environment. This study aims to… More

With the advancement in diagnostic imaging, providing shielding against X-rays has become a significant concern. While Lead has been extensively used as the shielding material, it is costly and toxic to humans and the surrounding environment. This study aims to evaluate the feasibility of eggshells as alternative shielding material against diagnostic X-rays. To this end, the eggshells were collected, ground, sieved and mixed with cement and water with an increasing amount. Radiographic analysis was utilized to measure the performance of the shields. The results showed that increasing the number of eggshells increased its shielding performance; however, more shielding is required at higher X-ray energies. Nevertheless, the performance of the standard Lead shield and the shield with the highest number of eggshells yielded a comparable result. The eggshells can be used as alternative shielding material against diagnostic X-rays. Less

Mount Apo Natural Park (MANP) is an important forest reserve in most part of Region XI and XII because of its watershed importance. However, the MANP may also threatened by habitat modification that may alter most of its water resource.… More

Mount Apo Natural Park (MANP) is an important forest reserve in most part of Region XI and XII because of its watershed importance. However, the MANP may also threatened by habitat modification that may alter most of its water resource. Thus, this study was conducted to assess the abundance of freshwater fish and analyze the physico-chemical properties like water temperature, pH, turbidity, dissolved oxygen (DO), total dissolved solids (TDS), electric conductivity (EC), oxidation-reduction potential (ORP) of the two major rivers of MANP. A total of six freshwater fishes consisting of four native and two introduced species were collected and identified in the two sampling stations. The native Barbodes binotatus (Valenciennes 1842) was found to be the most abundant in all the years the survey was conducted. The data on physico-chemical properties showed fluctuations in all year (2012-13 and 2015). High turbidity rate in Marbel River and high water temperature recorded in upper station of Matingao River could have influenced the collection and abundance of freshwater fishes. Shannon diversity index in Marbel River and Matingao River are very low with values of 0.69 (2012-2013); 0.68 (2015) and 0.70 (2012-2013); 0.70 (2015) for the two rivers, respectively. This could be attributed to anthropogenic activities, characteristics and physico-chemical properties of the river. Less

The purpose of this study was to determine secondary physics teachers’ conceptions about Simple DC circuits. Data were obtained from responses in two sets of concept tests related to DC circuits and Determining and Interpreting Resistive Electric Circuits Concept Test… More

The purpose of this study was to determine secondary physics teachers’ conceptions about Simple DC circuits. Data were obtained from responses in two sets of concept tests related to DC circuits and Determining and Interpreting Resistive Electric Circuits Concept Test (DIRECT) developed by Engelhardt and Beichner. The study involved 24 physics teachers teaching in private and public high schools in Bukidnon. Results have shown that teachers have misconceptions similar to those held by students. Moreover, the study was extended to determine the usefulness of workshop activities on the same subject matter in identifying and improving the alternative views and associated mental models that the teachers hold. Less

Siltation at Pulangui Reservoir in Maramag, Bukidnon is a big problem for the hydroelectric power plant. This study explores the potential of Pulangui alluvial sediments from five different locations for compressed stabilized earth block (CSEB) production based on the soil… More

Siltation at Pulangui Reservoir in Maramag, Bukidnon is a big problem for the hydroelectric power plant. This study explores the potential of Pulangui alluvial sediments from five different locations for compressed stabilized earth block (CSEB) production based on the soil consistency and textural properties of sediments and compressive strength of the blocks. The effect of coal fly ash as partial replacement to ordinary portland cement as binder was also examined. The results showed that the soil consistency and textural properties of alluvial sediments failed to pass the suitability criteria for CSEB. Additional sand was added in 1:2 ratio (soil to sand). The replacement of cement with coal fly ash tends to increase its compressive strength up to 20% replacement of cement. The highest compressive strength was observed from the alluvial soils of Panadtalan with 4.32 a . CSEB is viewed to have certain potentials that have the comparative advantage over other materials like hollow blocks but needs a promotional campaign to encourage its usage. The comparative cost analysis revealed that the CSEB with coal fly ash is only 4.30% cheaper compared to the conventional method. Overall, the alluvial deposits of Pulangui reservoir and coal fly ash could be utilized for CSEB production. Less