306 research outputs found
Corrigendum to Practices of Law Number 6292 and Evaluation of Lands Taken Out of Forest Boundary: The Case of Finike District Year 2020, Volume 22, Issue 1, 222 - 231, https://doi.org/10.24011/barofd.659281
No full textThe authors regret there was an error in the author line related to a forgotten author and the corrected author Line is provided below. Mohammad CHEHREH GHANI 1,*, Nimet VELİOĞLU 2 1İstanbul Üniversitesi, Orman Fakültesi, Orman Mühendisliği Bölümü, , İSTANBUL 2 *Sorumlu Yazar (Corresponding Author): İstanbul Üniversitesi, Orman Fakültesi, Orman Mühendisliği Bölümü, , İSTANBUL These changes would not affect the results and conclusion of the whole manuscript. The authors would like to apologize for any inconvenience caused.*The authors regret there was an error in the author line related to a forgotten author and the corrected author Line is provided below. Mohammad CHEHREH GHANI 1,*, Nimet VELİOĞLU 2 1İstanbul Üniversitesi, Orman Fakültesi, Orman Mühendisliği Bölümü, , İSTANBUL 2 *Sorumlu Yazar (Corresponding Author): İstanbul Üniversitesi, Orman Fakültesi, Orman Mühendisliği Bölümü, , İSTANBUL These changes would not affect the results and conclusion of the whole manuscript. The authors would like to apologize for any inconvenience caused
Performance investigation of a naturally driven building ventilation terminal.
No full textNaturally driven ventilation terminals (wind vents) offer a way of improving comfort conditions while reducing building carbon emissions. The device sits on top of the building, trapping the air at higher velocity and delivering it into the interior of the building. The current cross-ventilated design combines the velocity, pressure, and density of air to produce wind driven ventilation. Currently there is scarce research investigating the performance of these devices in the United Kingdom (UK).This thesis provides a performance evaluation and optimisation of a commercially available building ventilation terminal (a benchmark) in the UK. A systematic review and optimisation of the device's geometrical components has been carried out using Computational Fluid Dynamics (CFD) and far-field experimentation.An extensive literature review was carried out to provide the framework for this investigation. Building on existing (developed) research techniques, the knowledge gaps identified in this subject area, were isolated and examined thoroughly.A new methodology for creating and dynamically modifying CFD models using complete wind vent geometry was devised. Using this technique the wind vent was subjected to systematic geometrical variation to establish the contribution of each component to the overall performance of the device.The research used full scale Far field experimentation to validate the CFD models of the wind vent. The Far field experimentation provided greater accuracy (0 - 0.08m/s) for this application, when compared to other validation techniques such as wind tunnel experimentation (0 - 0.15m/s).A new empirical methodology was devised for predicting the airflow through a wind vent. The empirical method was based on two dimensionless coefficients (0.44 and 0.3) found through the CFD experimentation research carried out.The investigation established the device is capable of meeting current British Standards Institute (BSI) guidelines, and is therefore suitable for UK applications. The BSI recommended 0.8L/sec of fresh air per m[2] floor area. The benchmark wind vent geometry delivered 1.1 L/sec per m[2] of floor area with an external wind speed of 1m/s (UK average was 4.5m/s).The key geometrical components (in isolation) were identified as the louver angle, distance between louvers and the number of louvers (now subject to patent number 0809311.4). Each of these geometrical variations provided an increase in performance over the benchmark case in the range of 27 - 45%. An optimum configuration of these parameters did not deliver the same increased performance range as the isolated case. However the optimised combination case increased the internal air movement rate using 50% less material than that of the benchmark geometry
Estimation of statistical parameters in candidate wheat genotypes for yield-related traits
No full textBackground: The selection of genotypes in breeding programs relies on accurate estimates of heritability for variables relevant to yield. The better genotypes may be chosen rapidly using statistical estimate. Seventeen advanced breeding lines and three commercial bread wheat (Triticum aestivum L.) genotypes (used as checks) were assessed regarding their genetic characteristics for yield-related traits in the cur-rent study.Methods: Grain yield's correlation with several possible qualities was investigated and compared to regional controls.Results: The results showed that the peduncle length was positively correlated with the spike length, plant height, and total number of spikes. There was a favorable correlation between grain yield and spike count. The number of tillers per square meter was favorably connected with days to maturity but nega-tively correlated with grain weight, moisture percentage, and gluten content. The percentage of protein and gluten also declined with the increasing quantity of grains in each spike. Weight per 1000 grains was favorably connected with moisture percent and negatively correlated with days to maturity. Day of matu-rity was positively correlated with yield, whereas day of blooming was negatively correlated. The number of tillers m-2 had strong heritability and rapid genetic improvement. The number of grains per spike, plant height, 1000-grain weight, peduncle length, days to maturity, and protein percentage all demon-strated high broad sense heritability and moderate genetic advance, whereas spike length and starch per-centage both displayed low heritability and poor genetic advance. The number of spikes per plant, plot yield, days to flowering, moisture%, and gluten% all showed moderate heritability with modest genetic progress.Conclusion: Following from the above, it is recommended that plant features with high heritability and genetic advancement be given preference in selection, while qualities with a negative link to grain output be subjected to cautious selection.(c) 2022 The Author(s). Published by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).King Saud University, Riyadh, Saudi Arabia; [RSP-2022R7]Acknowledgments This project was supported by Researchers Supporting Project number (RSP-2022R7) King Saud University, Riyadh, Saudi Arabia
Assessment Of Turbulence Models For Hydrofracturing Slurry Transport Simulation In Horizontal Perforated Pipe
No full textHydraulic fracture is a well stimulation process that involves injecting
pressurized liquid at high velocity to initiate and propagate a fracture in the deep rock
formations through which hydrocarbons are extracted [1]. Typically, the pressurized
liquid, or the fracking liquid, is water mixed with sand. The water creates the fracture
and the sand maintains the void open. Hydraulic fracture stimulation is a standard
completion process for modern unconventional gas reservoirs. Proppant transport
through the wellbore is a major consideration when a horizontal well is fractured.
CFD simulation is utilized to understand the hydrofracturing process. This
study is characterizing different turbulence models that can capture the hydraulic
fracturing process. Selection of a suitable CFD turbulence model is carried through
investigating slurry flow in a horizontal pipe and employing various turbulence
models. The CFD results obtained from a Standard k-ε, Renormalization Group
(RNG) k-ε and Reynold-Stress-Model (RSM) were assessed. The (RNG) k-ε model
deemed the best turbulence model when capturing the slurry flow behavior.
In a laboratory experiment, particle image velocimetry (PIV) was used to non
intrusively measure the transportation of sand slurry flow in a horizontal see through
pipeline with perforated holes. The investigation reports the results of the slurry flow patterns, the slurry flow pressure drop, the concentration profile and velocity
distribution at the perforated holes.
The experimental results supported the validity of the (RNG) k-ε model in
obtaining reliable predictions of the slurry flow. A linear relationship between the
surly velocity and the sand solid phase velocity was established
KARISMA K.H. MUHAMMAD ZAINI ABDUL GHANI DAN PERAN SOSIALNYA (1942-2005)
No full textIn this exposure, the author proposed about KH Muhammad Zaini Abdul Ghani, the study on charisma and social role and Kharisma of KH Muhammad Zaini Abd. Ghani also supported by the ability to master the classical Islamic sciences. He was able to explain the concepts and to construct elaborate religious in simple language. Therefore, when listening to the description of his talk was easy to understand, understood and grown the love (awe) to him. Feelings of love and admiration were also growing in the hearts of thousands of his disciples. Therefore, a lot of people who liked to tell his karamah - Karamah, although teachers themselves said, Karamah not very important for one's piety, but the consistency in doing good, more better than a thousand Karamah. Once passed away into Rahmatullah, the tomb of K.H. Muhammad Zaini Abd. Ghani always visited by the public until now. Hundreds of people come every day from various parts of this city. This shows that his charisma is not lost when the person dies
غنی خان کی شاعری میں پسے ہوئے طبقے کی ترجمانی: REPRESENTATION OF THE OPPRESED CLASSES IN THE POETRY OF GHANI KHAN
No full textA great poet of Pakhto language author, scholar, painter, painter, sculptor, engineer, politician and philosopher, Ghani khan was such a multi-dimensional personality of the 20th century who is, deservedly, the focus of Pakhtun nation’s pride۔ The person of Ghani khan is a veritable whole of numerous talents۔ His interests and work encompasses quite varied and broad subjects but his prominence is primarily based on his stature as a great poet۔ Although, his poetry consist of many equally important aspects, this research paper aims to bring into relief only those portion of his poetry which portrays the plight and fain of the poor, oppressed and down-trodden section of the society۔
Mathematical model for optimising the performance of a ground source heat pump.
No full textEnergy demand for the twenty first century is expected to increase many fold along with corresponding diversification of energy sources and generation methods. Of the many energy sources available, use of Ground Source Heat Pump (GSHP) system is the focus of the analysis in this research. This work is carried out to identify the key parameters which affect the performance of the GSHP system. A mathematical model has been developed to understand the complex operation of the heat pump under typical working conditions. Individual sub-systems, such as Ground Heat Exchanger (GHE), evaporator, condenser, compressor and radiator are modelled in MathCAD and coupled together and solved simultaneously. The performance of the system is predicted while varying air temperature, power input to the compressor and the ground temperature beneath the earth's surface. In addition a special sub-model was developed for the single vertical U-tube GHE in FLUENT, a Computational Fluid Dynamics (CFD) software, to calculate the overall heat transfer coefficient for varying outer surface temperature of the borehole.The overall system results are validated against the published results with the system operating range of 18°C to 33°C with around 10 percent deviations. It is determined that the COP of the system increases with surface area and overall heat transfer coefficient (OHTC) of the heat exchanger. An increase in up to 500 m2 surface area, steep raise of COP from 10.05 to 10.3 is observed. Similarly increase of 10 W/m2K of OHTC has steep COP rise from 10.05 to 10.28. The temperature gradient across the system also has influence on its operating performance, where a 15°C increase in the ground temperature for cooling mode reduces the COP by around 5%. Finally the degree of refrigerant sub-cooling has a positive effect, for every 5°C temperature drop the COP improves by 0.5 similarly for degree of super-heating, COP improves by 0.25. Scope for performance enhancement for GSHP is investigated by tuning operating conditions. The effect of operating variables to the sensitivity of performance of heat pump is also determined
EXPERIMENTAL AND CFD INVESTIGATION OF SOLAR CENTRAL RECEIVER TUBES
No full textLower electricity cost corresponds to high efficiency, which in turn corresponds to high operating temperatures in Concentrated Solar Power technology. Central receiver of such system constitutes 15% of the cost and plays an important role in achieving high operating temperatures. Central receiver systems are composed of tubes with heat transfer fluid flowing inside them that transports heat from radiation on the outer wall of tubes. Circular cross-sectional tubes are conventionally used for this application, but many different variable geometry tubes have been proposed for better heat transfer. Numerous experiments have shown the enhanced heat transfer behavior of different corrugated tubes. This work proposes a tube of new cross-sectional geometry and performs experiment using water as heat transfer fluid. The experiment is conducted on four different samples of corrugated tubes adopted from literature and compared to a circular tube and a new proposed tube. The experimental and CFD results are compared and reported. It is found that the new tube design can be used for such heat transfer applications but is not an ideal option. Meanwhile, corrugated tubes have higher heat transfer than circular tube, but not without the addition of extra material and pressure drop. If the material is to be kept similar for all tubes, circular tube is found to be the best option for central receiver systems
Towards Sub-regional cooperation: India’s Northeast and Bangladesh
No full textThe South Asian countries have a shared past based on deep-rooted common cultural heritage and historical legacy. The region has demographic and geographical advantages young labour force and a contiguous border. The spatial dimension of regional integration of Northeast India and Bangladesh can be inferred from the historical fact that economic growth of Northeast during the British rule flourished essentially on the strength of its integrated transport network through East Bengal. Inland-water trade between India and Bangladesh is important in linking not only Assam but the region as a whole to Bangladesh. Cost effective trade routes through water ways is more important than land routes for India’s Northeast through the corridors of Bangladesh. Notwithstanding the importance of waterways, the land routes continue to be the safe transit for informal trade between both the countries.Regional cooperation; Northeast India
CHALLENGING GENDER ROLES: A FEMINIST ANALYSIS OF GHANI KHAN'S THE PATHANS
No full text<p><span>The present research aims to analyse the representation of gender dynamics in Ghani Khan’s <em>The Pathans</em> who is also known as Lewanai </span><span>Phalsafi (The Lunatic Philosopher), <span>is a towering literary figure in Pashto literature. He is commonly known for his poetry and art. Ghani Khan strived to unveil the atrocities of the tribal system and the usurpation of women's rights at the hands of the Pashtoon male-dominant society. Using a feminist theoretical framework and conducting textual analysis, this study endeavours to examine the ways prominent Pashto poet Khan challenges the traditional gender roles of Pashtuns. Specifically, this analysis will focus on the respective representation of masculinity and femininity and the power dynamics, and social norms that define both Pashtun women and Kaftar. The author has used strong female characters, increased the question of masculinity, and created a broader discussion on gender views. Therefore, all aspects of writing are from a feminist perspective. Hence, The Pathans emerges as a dominant text in creating and changing gender roles. The study reveals the ambiguous view of the author on the question of gender roles and shows how these views are expressed through the characters of women and men of Kurdish nationality. The study has shown that Khan’s place of birth strongly influences his views on the distribution of rights and obligations between people of different genders. Khan’s novel focuses on how power relations are pivotal in a particular society. </span></span></p>
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