Viability of Rice Husk Ash Concrete Brick/Block from Green Electricity in Bangladesh

As a developing country, Bangladesh has to face numerous challenges. Self Independence in electricity, contributing to climate change by reducing carbon emission and bringing the backward population of society to the mainstream is more challenging for them. Therefore, it is essential to ensure recycled use of local products to the maximum level in every sector. Some private organizations have already worked alongside government to bring the backward population to the mainstream by developing their financial capacities. As rice husk is the largest single category of the total energy supply in Bangladesh. As part of this strategy, rice husk can play a great as a promising renewable energy source, which is readily available, has considerable environmental benefits and can produce electricity and ensure multiple uses of byproducts in construction technology. For the first time in Bangladesh, an experimental multidimensional project depending on Rice Husk Electricity and Rice Husk Ash (RHA) concrete brick/block under Green Eco-Tech Limited has already been started. Project analysis, opportunity, sustainability, the high monitoring component, limitations and finally evaluated data reflecting the viability of establishing more projects using rice husk are discussed in this paper. The by-product of rice husk from the production of green electricity, RHA, can be used for making, in particular, RHA concrete brick/block in Bangladeshi aspects is also discussed here

The right way to kiss: directionality bias in head-turning during kissing

Humans have a bias for turning to the right in a number of settings. Here we document a bias in head-turning to the right in adult humans, as tested in the act of kissing. We investigated head-turning bias in both kiss initiators and kiss recipients for lip kissing, and took into consideration differences due to sex and handedness, in 48 Bangladeshi heterosexual married couples. We report a significant male bias in the initiation of kissing and a significant bias in head-turning to the right in both kiss initiators and kiss recipients, with a tendency among kiss recipients to match their partners’ head-turning direction. These interesting outcomes are explained by the influences of societal learning or cultural norms and the potential neurophysiological underpinnings which together offer novel insights about the mechanisms underlying behavioral laterality in humans

Different approaches to the second order Klein-Gordon equation

We derive the Klein--Gordon equation for a single scalar field coupled to gravity at second order in perturbation theory and leading order in slow-roll. This is done in two ways: we derive the Klein--Gordon equation first using the Einstein field equations, and then directly from the action after integrating out the constraint equations. We also point out an unexpected result regarding the treatment of the field equations.Comment: 9 pages, revtex

Peningkatan Keterampilan Siswa Berbicara Melalui Media Gambar Dikelas III SD Inpres Maranatha.

Penelitian ini merupakan penelitian tindakan kelas yang bertujuan untuk meningkatkan hasil belajar siswa berbicara pada siswa kelas III SD Inpres Maranatha dengan menggunakan media gambar, dimana media gambar adalah salah satu media yang mudah digunakan oleh guru dalam menyampaikan materi pembelajaran, dan juga dengan menggunakan alat peraga tersebut siswa merasa senang ketika mengikuti kegiatan pembelajaran dan siswa juga merasa mudah memahami materi yang disampaikan oleh guru. Desain penelitian ini mengikuti model Kemmis dan Mc. Taggart (Arikunto, 2007) dengan subyek melibatkan 30 orang siswa. Penelitian ini dilaksanakan dalam dua siklus dengan pembelajaran berbicara, masing-masing siklus meliputi 4 tahap: (i) perencanaan (ii) pelaksanaan tindakan (iii) observasi dan (iv) refleksi. Penerapan media gambar dapat meningkatkan hasil belajar berbicara siswa kelas III, Hal ini dapat dilihat pada peningkatan hasil belajar siswa, untuk ketuntasan klasikal pada siklus I sebesar 46,7% dan pada siklus II sebesar 86,7% dan meningkat sebesar 40%. Untuk daya serap klasikal pada siklus I sebesar 61,8% dan pada siklus II sebesar 72,2% dan meningkat sebesar 10,9%. Sedangkan untuk aktivitas guru pada siklus I diperoleh rata-rata persentase sebesar 55,29% berada pada kategori kurang dan pada siklus II diperoleh rata-rata persentase sebesar 85,,88% berada pada kategori baik dan meningkat sebesar 30,59%. Untuk aktivitas siswa pada sisklus I diperoleh rata-rata persentase 45,33% berada pada kategori kurang dan pada siklus II diperoleh rata-rata persentase sebesar 80% berada pada kategori baik dan meningkat sebesar 34,67%

A roadmap to develop dementia research capacity and capability in Pakistan: a model for low- and middle-income countries

Objective To produce a strategic roadmap for supporting the development of dementia research in Pakistan. Background While global research strategies for dementia research already exist, none is tailored to the specific needs and challenges of low- and middle-income countries (LMIC) like Pakistan. Methods We undertook an iterative consensus process with lay and professional experts to develop a Theory of Change-based strategy for dementia research in Pakistan. This included Expert Reference Groups (ERGs), strategic planning techniques, a “research question” priority survey, and consultations with Key Opinion Leaders. Results We agreed on ten principles to guide dementia research in Pakistan, emphasizing pragmatic, resource sparing, real-world approaches to support people with dementia, both locally and internationally. Goals included capacity/capability building. Priority research topics included raising awareness and understanding of dementia, and improving quality of life. Conclusion This roadmap may be a model for other LMIC health ecosystems with emerging dementia research cultures

Nano-confined synthesis of highly ordered mesoporous carbon and its performance as electrode material for electrochemical behavior of riboflavin (vitamin B2) and dopamine

Highly ordered mesoporous carbon (MC) has been synthesized from sucrose, a non-toxic and costeffective source of carbon. X-ray diffraction, N2 adsorption–desorption isotherm and transmission electron micrograph (TEM) were used to characterize the MC. The XRD patterns show the formation of highly ordered mesoporous structures of SBA15 and mesoporous carbon. The N2 adsorptiondesorption isotherms suggest that the MC exhibits a narrow pore-size distribution with high surface area of 1559 m2/g. The potential application of MC as a novel electrode material was investigated using cyclic voltammetry for riboflavin (vitamin B2) and dopamine. MC-modified glassy carbon electrode (MC/GC) shows increase in peak current compared to GC electrode in potassium ferricyanide which clearly suggest that MC/GC possesses larger electrode area (1.8 fold) compared with bare GC electrode. The electrocatalytic behavior of MC/GC was investigated towards the oxidation of riboflavin (vitamin B2) and dopamine using cyclic voltammetry which show larger oxidation current compared to unmodified electrode and thus MC/GC may have the potential to be used as a chemically modified electrode

Optical properties of diamond like carbon films prepared by DC-PECVD

Diamond-like carbon (DLC) thin films were deposited at different substrate temperatures using methane and hydrogen gas in DC-PECVD at 2x10-1Torr. From the light transmission using UV-VIS spectroscopy it was found that the optical transition had changed from allowed indirect transition to allowed direct transition as the substrate temperature increased. The Optical gap increased with temperature, highest of 3.034 eV was observed at 573 K, beyond which it dropped. Colour of the film changed from light brownish to a colourless transparent film in the higher temperature. The Urbach energy decreased from 1.25 eV to 0.75 eV with increasing substrate temperature till 573 K and a slight increase after it. This trend is attributed to change in sp3/sp2 ratio or change in structure. The cluster size decreases with temperature, resulting in larger band gap and the structure more ordered. Similar pattern is also witnessed in the emission spectrum of the photoluminescence

Dimension and stackability of cassava (Manihot esculanta Crantz) chips for mass production

Cassava chips that exist in the current market have no standardisation and cannot be stacked nicely into cylindrical container. The objectives of this work are to determine the different dimension of cassava chips produced with different thickness and to develop stackable chips during mass production. Fresh cassava tubers were harvested, washed, peeled and sliced. The thickness measurements used were 1.0 mm, 1.5 mm, 1.75 mm and 2.0 mm and 1.27 mm thickness was measured from commercial potato chips as a controlled sample. Then, it was fried in deep fat fryer with the temperature of 170°C. For each thickness studied, different numbers of slice (10, 20, 30 and 40 slices) were fried simultaneously. Results showed that there are 6 shapes of fried chips produced during the frying. To conclude, thickness of the slice and number of slices fried simultaneously give impact towards the shape of fried chip