2,753 research outputs found

    The survey of removal of suspended solids from river at flooding period by plain sedimentation process

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    The most important of surface sources of water in the large city are rivers. The turbidity and flow rate of rivers is a constantly changing phenomenon in the seasons from year. During rainy period, the run off carries with it silt, clay and sand which make a severe increasing in turbidity to over 1000NTU. The increasing of turbidity causes which the water plant treatment receives the more solides.However; in order to protection of plant units must apply pretreatment processes. In this research, the effectiveness of settling process in order to removal of TSS from raw water was studied. The beginning of the work, lab-scale pilot designed which consisted of a raw water preparation container; the settling column was made of Plexiglas with 2m height, 20cm diameter and the six of sampling ports. The settling column filled with the raw water associated with sediments of river. At defined time steps (30-60-90-120-150-180 min) samples were taken out from the bottom of the column (180cm under water surface). The temperature of water was in the range of 15 to 18oC during experiments. The results showed that between the increasing of TSS removal and settling time, a direct and significant relative (p<0/01) was obtained by Pearson, s correlation coefficient. Also with increasing the depth, the removal efficiency of TSS and turbidity decreased. In the settling time of 30min, 2640mg/L of TSS concentration, the depths of 30 and 180cm, systematically, the TSS removal 92.42% and 80.47% was obtained. when the initial TSS concentration increase to 27640mg/L (the most concentration of TSS), with increasing SOR from 25m/d to 60m/d, the total removal efficiency decreased from 99.2% to 92.2%, and with the TSS of concentration equals to 2640mg/L, the rate of total removal efficiency decreased from 97.2% to 95.7%. The results showed that the rising of SOR and TSS concentration, decreased the total removal efficiency. Also, these are an opposite and significant relative (p<0/05) between the removal of TSS and initial concentration of TSS

    The Use of Song Lyrics in Teaching Listening (a Case Study of Junior High School Grade 8 in Bandung)

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    This research entitled The Use of Song Lyrics in Teaching Listening (A Case Study of Junior High School Grade 8 in Bandung) was aimed at investigating the students' response toward the use of song lyrics during the teaching of listening, and the challenges faced by the teacher and students in using song lyrics in listening class. This research employed qualitative method by involving a case study in one of junior high school in Bandung. The data were obtained through classroom observation and questionnaire. The data from classroom observation were obtained from video recording, student's checklist and teacher's field notes during the teaching program. The data analysis were presented in a form of descriptive explanation, and then the data collected from questionnaire were analyzed and summarized by using the frequency table, represented in graphs, then described the phenomenon found. The findings of this study showed the use of song lyrics as an effective technique for teaching listening. Significantly, it can be seen that the students enjoyed their listening activity. As a result, they responded positively and enthusiastically to the lesson, and engaged easily in the whole learning process

    Rekonstruksi Yuridis Kekayaan Negara yang Dipisahkan pada Badan USAha Milik Negara

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    The Achievement of purpose of the state is always related to state finance as the financing of the operation of the government. In order to get the state finance, it must remain within the legal framework that is allowed by the 1945 Constitution. The problems of state finance management get a lot of attention. The state finance management through regulation definition of state finances,ideally will be very promising for the country\u27s financial rescue efforts of irregularities, but it will become problems if correlated with other regulations. Enactment of the Act Number 19 of 2003 on State-Owned Enterprises, has created a contradictory climate and polemical state finances statusin State-Owned Enterprises environment both in ownership and in management and supervision. The specifications of this research was done by normative juridical approach, ie testing and reviewing secondary data. With regard to the normative juridical approach that is used, the research was conducted in two phases, namely the study of literature and field research that are merely supporting, data analysis used is the analysis of qualitative juridical, ie the data obtained, and then arranged systematically, comprehensively and integratedly to achieve the clarity of the issues that will be analyzed. According to Article 2 of Act Number 17 of 2003 on State Finance, state assets stated aside the scope of state finances. Based on the results of the research, separated state asset is not a state financial scope. In this case, the state budget may not overcome the losses resulted from the management of State-Owned Enterprises

    Relationship between bridging and dimensions of sella turcica with classification of craniofacial skeleton

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    Purpose: In orthodontics, it is essential to determine the craniofacial skeleton pattern (class I, II, III) for planning treatment. Sella turcica bridging that is seen on lateral cephalometric radiographs is considered as a normal finding. This study aimed to compare sella turcica bridging and its dimensions in patients with various craniofacial patterns. Material and methods: A total of 105 lateral cephalometric radiographs (53 men and 52 women), aged 14-26 years, were randomly and equally assigned to three groups of class I, II, and III, respectively. The length, diameter, and depth of the sella turcica as well as sella turcica bridging were determined on radiographs. The chi-squared test was used for assessing the relationship between sella turcica bridging and craniofacial skeleton classification. ANOVA was used for assessing the relationship between the dimensions of the sella turcica and craniofacial skeleton classification. The Pearson's correlation coefficient was used for assessing the relationship between age and the dimensions of the sella turcica. Results: The sella turcica had a normal shape in 64.76% of patients, whereas 35.33% of patients had sella turcica bridging. In total, 11.42% of patients belonged to class I, 34.28% to class II, and 66.62% to class III. The diameter of the sella turcica had a significant relationship with age; the diameter of the sella turcica increased with age (p < 0.001). Conclusions: There is a significant relationship between craniofacial skeleton patterns and sella turcica bridging, i.e., the incidence of sella turcica bridging is higher in class III patients. The sella turcica had a greater diameter in older patients
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