Anthropogenic impact on land use land cover: influence on weather and vegetation in Bambasi Wereda, Ethiopia

Tamam Emiru,Hasan Raja Naqvi,Mohammed Abdul Athick 대한공간정보학회 2018 Spatial Information Research Vol.26 No.4

Land Use Land Cover Changes (LULCC) has impacts on a wide range of environmental and landscape attributes including the quality of land, water and air. The main objective of this study was to analysis the impact of anthropogenic activities and LULCC on weather (rainfall and temperature) and vegetation in the study area over a period of 28 years. The study has employed temporal LANDSAT sensors data to identify the changes in LULC and Vegetation Indices through anthropogenic influence. Moreover, statistical analysis of temperature and rainfall data (1985–2015) has also been done of Bambasi station. It has been found that the average temperature has been increased approximately 2.2 C and the average rainfall amount was declined throughout the period. The drastic changes have been noticed in LULC, vegetation health and its area through NDVI during the first interval (1987–2001) but the land change growth was less in second interval (2001–2015). The increasing population, urbanization and resettlement scheme for refugees were the responsible factors for changes. This case study indicates that the impact of anthropogenic activities leads the change in LULC and the climate has been influenced or vice versa over the time period in this semi-arid region of Ethiopia.

Utilization of plastic bottle waste of polyethylene terephthalate as a low-cost membrane and its modifications for gas separation

Badrut Tamam Ibnu Ali,Cininta Nareswari,Triyanda Gunawan,Nurul Widiastuti,Yuly Kusumawati,Juhana Jaafar,Hens Saputra,Dety Oktavia Sulistiono 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.127 No.-

Polyethylene terephthalate (PET) is a widely used polymer in packaging products, leading to the daily disposalof millions of PET bottles as waste. 1.1 to 8.8 million tonnes of plastic waste enter the sea each year. The environmental challenge of non-biodegradable PET waste can be addressed by utilizing it as a thinlayermembrane for gas separation. This study modified the PET membrane by blending it with Pebaxpolymer and adding zeolite as a filler to enhance its performance. Characterization techniques, includingFTIR, SEM, TGA, tensile strength testing, and contact angle measurements, were performed on all modifiedmembranes. The membranes were prepared using phase inversion via immersion precipitation. Theresults showed that the PET waste membrane had a denser surface pore morphology and asymmetricalcross-sectional pores than other membranes. Adding Pebax and zeolite resulted in a more regularsponge-like pore structure. The PET, PET-Pebax, and PET-Zeolite NaY-Pebax membranes exhibited hydrophilicproperties, as indicated by contact angle values ranging from 48-78. Regarding CO2/CH4 separation,the 9% PET-Pebax membrane had the highest CO2 permeability, a 21% increase from the originalPET waste membrane. Adding zeolite to the 9% PET-Pebax membrane increased CO2 permeability to1044%.

Influence of ethnic-related diversity experiences on intercultural sensitivity of students at a public university in Malaysia

Ezhar Tamam,Ain Nadzimah Abdullah 서울대학교 교육연구소 2012 Asia Pacific Education Review Vol.13 No.3

In this study, the authors examine the influence of ethnic-related diversity experiences on intercultural sensitivity among Malaysian students at a multiethnic, multicultural and multilingual Malaysian public university. Results reveal a significant differential level of ethnic-related diversity experiences (but not at the level of intercultural sensitivity) across ethnic groups studied. In comparison, the minority ethnic group of Indian students had a significantly higher level of ethnic-related diversity experiences than the Chinese and Malay students. The hypothesized significant main effect of level of ethnic-related diversity experiences on the level of intercultural sensitivity among the students is supported. The high-level ethnic-diversity experiences group significantly shows a higher level of intercultural sensitivity than the moderate and low-level groups, and the moderate level group is significantly higher than the low-level group. However, no significant interaction effect of ethnicity and ethnic-related diversity experiences on intercultural sensitivity is found. The implications of these findings are discussed further in the paper.

In vitro Propagation, Genetic Stability, and Secondary Metabolite Analysis of Wild Lavender (Lavandula coronopifolia Poir.)

Wesam Al Khateeb,Razan Kanaan,Tamam El-Elimat,Muhammad Alu’datt,Jamil Lahham,Ahmad El-Oqlah 한국원예학회 2017 Horticulture, Environment, and Biotechnology Vol.58 No.4

Lavenders (Lavandula species) are important aromatic ornamental medicinal plants with wide rangingapplications in perfume and pharmaceutical industries. We developed an in vitro propagation protocol for Lavandulacoronopifolia. Murashige and Skoog (MS) medium supplemented with 0.5 mg・L-1N6-benzyladenine was the bestmedium for the proliferation of microshoots, while the highest rooting frequency was obtained using MS mediumsupplemented with 1.0 mg・L-1indole-3-butyric acid. Inter-simple sequence repeat analysis revealed that the invitro-propagated microshoots were highly genetically stable, even after subculture. The highest callus fresh weight(667.9 mg) was obtained by propagating on medium supplemented with a combination of 1.0 mg・L-1naphthaleneaceticacid and 0.5 mg・L-1butyric acid. Using the Folin-Ciocalteu method, methanolic extracts of wild L. coronopifoliarevealed total phenolic content of 4.9 mg expressed in gallic acid equivalents (GAE) (mg GAE・g-1dry matter). Radicalscavenging activity was estimated at 85% using the free radical 2,2-diphyenyl-picrylhydrazyl assay. Using the brineshrimp assay for cytotoxicity, the methanolic extract was found to be nontoxic. Finally, liquid chromatography tandemmass spectrometry with standard reference compounds was used to quantify the key phenolic compounds in both invitro and in vivo-grown L. coronopifolia. Six major phenolic compounds were identified: caffeic acid, rosmarinic acid,rutin, quercetin, luteolin, and hesperidin. Levels of these phenolic compounds were highest in wild plant extracts.

The Relationship Between the Oxytocin Level and Rejection Sensitivity, Childhood Traumas, and Attachment Styles in Borderline Personality Disorder

Fatma Kartal,Kerim Uğur,Burak Mete,Mehmet Emin Demirkol,Lut Tamam 대한신경정신의학회 2022 PSYCHIATRY INVESTIGATION Vol.19 No.3

Objective In this study, it is aimed to investigate the relationship between the oxytocin level and the rejection sensitivity, childhood mental traumas, and attachment styles in patients diagnosed with borderline personality disorder (BPD).Methods Participants between the ages of 18–30 were included in the study. The patient group consists of 31 participants and the healthy control group consists of 31 participants. Sociodemographic/Clinical Variables Questionnaire, Relationship Scales Questionnaire, Rejection Sensitivity Questionnaire and Childhood Trauma Questionnaire were administered to the participants included in the study. Serum oxytocin levels of the participants were measured using the Elisa method.Results The oxytocin levels were found to be significantly lower in patients with BPD than in healthy control subjects, whereas the rejection sensitivity and childhood traumas were found to be significantly higher. No difference was found between the patient and control groups in terms of attachment styles, yet it was determined that there may be differences between the oxytocin levels of the BPD patients according to the attachment styles the patients have.Conclusion In conclusion, the findings of this study revealed that the rejection sensitivity in BPD patients is not associated with oxytocin levels and childhood traumas, indicating the need to assess the BPD patients in terms of other biopsychosocial factors related to the etiopathogenesis of BPD.

Evaluation of biogeneric design techniques with CEREC CAD/CAM system

Yeliz Arslan,Secil Karakoca Nemli,Merve Bankoğlu Güngör,Evsen Tamam,Handan Yılmaz 대한치과보철학회 2015 The Journal of Advanced Prosthodontics Vol.7 No.6

PURPOSE. The aim of this study was to evaluate occlusal contacts generated by 3 different biogeneric design modes (individual (BI), copy (BC), reference (BR)) of CEREC software and to assess the designs subjectively. MATERIALS AND METHODS. Ten pairs of maxillary and mandibular casts were obtained from full dentate individuals. Gypsum cast contacts were quantified with articulating paper and digital impressions were taken. Then, all ceramic crown preparation was performed on the left first molar teeth and digital impressions of prepared teeth were made. BI, BC, and BR crowns were designed. Occlusal images of designs including occlusal contacts were superimposed on the gypsum cast images and corresponding contacts were determined. Three designs were evaluated by the students. RESULTS. The results of the study revealed that there was significant difference among the number of contacts of gypsum cast and digital models (P<.05). The comparison of the percentage of virtual contacts of three crown designs which were identical to the contacts of original gypsum cast revealed that BI and BR designs showed significantly higher percentages of identical contacts compared with BC design (P<.05). Subjective assessment revealed that students generally found BI designs and BR designs natural regarding naturalness of fissure morphology and cusp shape and cusp tip position. For general occlusal morphology, student groups generally found BI design "too strong" or "perfect", BC design "too weak", and BR design "perfect". CONCLUSION. On a prepared tooth, three different biogeneric design modes of a CAD/CAM software reveals different crown designs regarding occlusal contacts and morphology.

Evaluation of biogeneric design techniques with CEREC CAD/CAM system

Arslan, Yeliz,Nemli, Secil Karakoca,Gungor, Merve Bankoglu,Tamam, Evsen,Yilmaz, Handan The Korean Academy of Prosthodonitics 2015 The Journal of Advanced Prosthodontics Vol.7 No.6

PURPOSE. The aim of this study was to evaluate occlusal contacts generated by 3 different biogeneric design modes (individual (BI), copy (BC), reference (BR)) of CEREC software and to assess the designs subjectively. MATERIALS AND METHODS. Ten pairs of maxillary and mandibular casts were obtained from full dentate individuals. Gypsum cast contacts were quantified with articulating paper and digital impressions were taken. Then, all ceramic crown preparation was performed on the left first molar teeth and digital impressions of prepared teeth were made. BI, BC, and BR crowns were designed. Occlusal images of designs including occlusal contacts were superimposed on the gypsum cast images and corresponding contacts were determined. Three designs were evaluated by the students. RESULTS. The results of the study revealed that there was significant difference among the number of contacts of gypsum cast and digital models (P<.05). The comparison of the percentage of virtual contacts of three crown designs which were identical to the contacts of original gypsum cast revealed that BI and BR designs showed significantly higher percentages of identical contacts compared with BC design (P<.05). Subjective assessment revealed that students generally found BI designs and BR designs natural regarding naturalness of fissure morphology and cusp shape and cusp tip position. For general occlusal morphology, student groups generally found BI design "too strong" or "perfect", BC design "too weak", and BR design "perfect". CONCLUSION. On a prepared tooth, three different biogeneric design modes of a CAD/CAM software reveals different crown designs regarding occlusal contacts and morphology.

Implementation of a Non-Surfactant Water-in-Diesel Emulsion Fuel in a Common Rail Direct Injection Diesel Vehicle

Abdul Rahman Hasbullah,Rahman Md. Mujibur,Yahya Wira Jazair,Kaonain Tamanna E.,Abd Kadir Hasannuddin,Tamam Mohamad Qayyum Mohd,Ithnin Ahmad Muhsin,Ahmad Fauzan,Abdullah Mohd Fareez Edzuan,Noge Hirofum 한국자동차공학회 2023 International journal of automotive technology Vol.24 No.5

Water-in-diesel emulsion fuel has become a popular alternative fuel for diesel engines. The main limitation is related to its stability, whereby it relies heavily on surfactants to remain homogeneous, therefore causing production costs to rise. This paper highlights the application of real-time non-surfactant emulsion fuel supply system (RTES), a water/diesel emulsifying device without surfactants, to produce water-in-diesel emulsion fuel in a common rail direct injection diesel engine powered vehicle. In this study, RTES was installed near to the diesel fuel pump to ensure water-in-diesel emulsions were continuously fed to the engine. The test vehicle was set up on a roller dynamometer and operated following a modified West Virginia University (WVU) 5-Peak cycle. Fuel consumption and exhaust emissions were measured to determine the optimum water percentage of emulsion fuel and suitable timing for emulsion fuel to be introduced into the fuelling system based on the vehicle speed. The results revealed that the optimum water percentage of the emulsion fuel for the test vehicle is 10 wt%, as it was capable to reduce fuel consumption as well as nitrogen oxides and smoke emissions of a common rail direct injection diesel engine powered vehicle.