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The Critical Links between Socio-Demographic Dynamics of Sundarbans Impact Zone and Forest Resource Depletion, Bangladesh: A Review
Get PDFThe question often asked is, does population dynamics in Sundarbans Impact Zone (SIZ)
matters to degradation of Sundarbans Reserve Forest in Bangladesh? This study aims to examine the
link whether population factors contribute to degradation of Sundarbans or not. Population size of SIZ
increased by around 56% in 2011 compared with 1974 (from 1377763 in 1974 to 2155889 in 2011).
Annual population growth rate in SIZ districts decreased dramatically, but sheer number of
population increased significantly which had contributed to increase the overall population size.
During 2001 and 2011, population growth rate of SIZ area was negative, yet the forest land decreased
which could be explained by the impact of climate change. Hence, not only population factors but also
other mediating factors are interplaying to the depletion of resources from Sundarbans. Rigorous
study on demographic determinants of SIZ is required while formulation policies and programs at
micro and macro level
An Analysis on Effects of Story Mapping in Writing Short Stories in EFL Classes, Iraqi Case
Get PDFIn this study, it is investigated that how much story map graphic organizers contribute to foster
writing short stories. Eighteen EFL students from foundation year were randomly chosen and provided
eight writing courses. First, the writing teacher provided a topic to the students for each course, and asked
them to write three short stories about given topics. In the following two lessons, the instructor introduced
graphic organizers and taught the elements of short story to the students. Later, they were given another
three topics for the following three courses to create short stories using story map graphic organizers
created by writing teacher. Then, the researcher selected two of their first and second pieces randomly and
developed a scale to assess the students’ first and second products. The results were classified by including
story elements.in two tables as percentage
The Effects of Working Abroad on the Development of Teaching Skills
Get PDFTeaching overseas has always been a great opprotunity for academic and social development. Teachers who have international experiences stand a better chance of not only developing their teaching skills, communication skills and classroom management but also learning new languages and about other cultures. Teaching abroad can help teachers promote their skills for efficiency and effectiveness. It is important to stress that teachers with international experience can teach effectively and contribute to the achievement of their students more. This paper focuses on the effects of working abroad as a teacher on the development of teaching skills
Isolation, Biochemical Identification and Antioxidant Activity of Locally Isolated Lactobacillus spp in Garmian Area
Get PDFThe study was conducted in the Biology research laboratory in Garmian University during the period of summer to autumn 2016, which aimed to the isolation and biochemically identification of Lactobacillus sp. and comparing their antioxidant activity with Lactobacillus reuteri ATCC 23272, as well as both of the isolates and reference strain with ascorbic acid which used as a control. Out of 25 samples were collected from different sources such as vaginal swabs, infant stool, sheep and cow’s milk, six strains of Lactobacillus sp were Identified according to their colony morphology on MRS agar along
with microscopic examination. Further identification strategies are carried out by biochemical analysis including catalase, oxidase, and API 50 CHL kit system through which strains as L. pentosus, L.acidophilus, L. collinoides, L. fermentum, L. salivarius and L. brevis were identified. The results of antioxidant activity which carried out by 2,2-DiPhenyl-2-Picryl hydrazyl hydrate ( DPPH) assay for all six isolated strains revealed that the best antioxidant activity was recorded by L. pentosus strain IC50=0.0464 which showed no-significantly differences with the ascorbic acid antioxidant activity IC50 = 0.0186, on the other hand, Lactobacillus reuteri ATCC 23272 exhibited antioxidant activity about IC50=1.998, in addition, other isolated strains L. acidophilus, L. fermentum, L. salivarius, L. collinoides and L. brevis demonstrates good antioxidant activity with IC50= 0.2311, 0.2792, 0.3707, 3.744 and 5.766 respectively
Can Human Rights be Reconciled with State Sovereignty?
Get PDFThis paper centres on the question as to whether human rights can be reconciled with sovereignty. Therefore, in order to examine the reconciliation of human rights and state sovereignty, it is important to know the nature of relationship between them. This research first, analyzes the impact of the historical evolution of human rights on changing the nature of sovereignty and then engages with the different arguments based on the moral, legal, and political nature of the human rights which has an effect on its relationship with state sovereignty. There are some who think that human rights exist outside legal system of the states and they are moral, independent, and universal, linked to the nature of our own humanity like Chris Brown who thinks human rights have a moral nature rather than legal. In contrast, some others are thinking that human rights exist within legal system of the states and focusing on the particularity of the human rights. In between, there is Andrew Vincent’s argument, which is more supported in this paper, who explains this relationship through the political dimension which has both moral and legal outcome, in Andrew Vincent’s words; the states can become both object and subject of the human rights at the same time
Effects of Increasing the Base on Concrete Dam Stability
Get PDFThe concrete dam is one of the most important hydraulic infrastructures which play a vital role in providing a wide range of water services and helps prevent many potential disasters such as floods. The concrete dam subjected to many kinds of static and hydrodynamic forces which almost needs taking into account of design under different circumstances to satisfy the safety requirements. The shape of dam is pertinent to the stability of dam regarding the major forces and stresses. One of the most common ways which is necessary to solve the problems in design due to the cases of unsafely for any mode of failures is to add mass to the dam upstream face. In this work, a parametric study is made to investigate the effects of the increase in the base of dam on the principal and shear stresses developed in the dam. In all cases, all the relevant factors of safety are satisfied. The stability analysis for all possible modes of failures is carried out to check the performance of the initial section of dam due several loading conditions. Parameters of importance are studied, discussed and conclusions are drawn
Pressure Coefficients of Curved Lip of Vertical Lift Gate in Dam Tunnels
Get PDFThe vertical lift gate shaft is installed across the dam tunnel to regulate the flow rate passing toward the downstream side to satisfy the water demand in addition to the power generation requirements. The flow through the shaft is mostly divided into two parts, over and below the gate, and as a result, two forces will be created, vertically ,downward and upward on both top and bottom gate surfaces. The difference between these forces produces so-called hydrodynamic force or hydraulic downpull force which has a vital effect on gate operation, so that in the case of negative values, this force will prevent the closure of the gate. The downpull force influences by many parameters, however, the geometry of gate is considered as one of the most common effective factor that influence the values and behavior of downpull force. In present study, physical hydraulic model is used to assess the effects of different rounded gate lip shapes on downpull force with respect to different gate opening ratios. The variation of bottom pressure coefficient along the gate surface has also been studied and the results are discussed
The Residual Strength for Different Shaped High Strength Concrete Specimens at High Temperature
Get PDFFire can be considered as a destructive hazard that attacks concrete structures. Exposing to high temperature causes deterioration in strength and spalling for high strength concrete members. In this research the effect of high temperature on the different high strength concrete specimen shapes is studied as a represent of circular and rectangular column sections. For this purpose, cube and cylindrical shaped specimens were made from polypropylene fiber contained high strength concrete, as well as the plain high strength concrete. After moist curing periods for 7, 28 and 90 days, the specimens were subjected to high temperatures of 450 and 6500C, and their residual compressive strength were evaluated. Cube specimens exhibited higher residual strength than cylindrical specimens and the superior stability of rectangular section columns compared to circular ones at high temperatures is concluded
Assessment of Strengthening Scheme of Existing Buildings Extended by Adding Additional Floors
Get PDFThis study intends to analyze and design existing RC frames, of different concrete compressive strengths when extended by adding more floors to the existing buildings. It may be decided whether a strengthening scheme is feasible or not.In this work, analyses are made of 3 buildings of 14-stories with different compressive strengths in the first 6-floor columns for each building, extended to 16-stories frame by adding 2 stories of Normal weight concrete (NWC) or Steel.A case study is selected which is an existing RC buildings, and the owner requested 2 additional floors. It is assumed that the foundation system is capable of carrying the additional floors. First the capacity of the superstructures must be known, by using data obtained from the previous designs of the existing buildings.After extending the building by NWC or Steel, by using STAAD-pro, it has been shown that a considerable portion of the total number of columns in the superstructure of the existing building couldn’t carry the new loads due to the additional 2 floors, so in order to add two additional floors, strengthening scheme must be planned for the columns which require additional capacity