cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Ly alpha emissters at z=6.5 in the SSA22 field: An area more neutral or void at the end of the reionization epoch
Creators: name: Nakamura, E.
name: Inoue, A. K.
name: Hayashino, T.
name: Horie, M.
name: Kousai, K.
name: Fujii, T.
name: Matsuda, Y.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present results of a survey of Lyman $α$ emitters (LAEs) at $z=6.5$ which is thought to be the final epoch of the cosmic reionization. In a $\approx530$ arcmin$^2$ deep image of the SSA22 field taken through a narrowband filter NB912 installed in the Subaru/Suprime-Cam, we have found only 14 LAE candidates with $L_{\rm Lyα}\ga3\times10^{42}$ erg s$^{-1}$. Even applying the same colour selection criteria, the number density of the LAE candidates is a factor of 3 smaller than that found at the same redshift in the Subaru Deep field (SDF). Assuming the number density in the SDF is a cosmic average, the probability to have a number density equal to or smaller than that found in the SSA22 field is only 7% if we consider fluctuation by the large-scale structure (i.e. cosmic variance) and Poisson error. Therefore, the SSA22 field may be a rare void at $z=6.5$. On the other hand, we have found that the number density of $i'$-drop galaxies with $25.5
description: MNRAS accepted
title: Towards the biological degradation of plastics: Genetic engineering of Saccharomyces cerevisiae to secrete Ideonella sakaiensis derived PETase.
Creators: name: Issa, Noor
Publisher: name: University of Kent
Year: 2021

description: In this project we demonstrated that two strains of Saccharomyces cerevisiae, were able to produce the heterologous protein Polyethylene Terephthalate (PET) hydrolase from the novel bacterium Ideonella sakaiensis. This novel enzyme has been shown to have the capability of degrading PET into its subsequent monomers, Ethylene Glycol and Terephthalic acid. The original native form of PET hydrolase was mutated by the Beckham lab (Skaf et al. 2018) to increase efficiency of degradation, the two residues changed were at the active site which resulted in the narrowing of the cleft. The residues changed were Tryptophan at position 159 to a Histidine residue; and Serine at position 238 to a Phenylalanine. In this study the double mutant form of the enzyme was used. In this project we also demonstrated the capability of PETase expressed by Saccharomyces cerevisiae to cause surface changes on waste PET samples. Lastly, we have also shown that Saccharomyces cerevisiae has the ability to form cell clusters similar to biofilms on a PET surface. All of these findings point to the viability of using Saccharomyces cerevisiae as a novel system for plastic waste removal in an industrial setting.
Gas depletion in Local Group dwarfs on ~250 kpc scales: Ram pressure stripping assisted by internal heating at early times
Creators: name: Nichols, Matthew
name: Bland-Hawthorn, Joss
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: A recent survey of the Galaxy and M31 reveals that more than 90% of dwarf galaxies within 270 kpc of their host galaxy are deficient in HI gas. At such an extreme radius, the coronal halo gas is an order of magnitude too low to remove HI gas through ram-pressure stripping for any reasonable orbit distribution. However, all dwarfs are known to have an ancient stellar population (\geq 10 Gyr) from early epochs of vigorous star formation which, through heating of HI, could allow the hot halo to remove this gas. Our model looks at the evolution of these dwarf galaxies analytically as the host-galaxy dark matter halo and coronal halo gas builds up over cosmic time. The dwarf galaxies - treated as spherically symmetric, smooth distributions of dark matter and gas - experience early star formation, which sufficiently heats the gas allowing it to be removed easily through tidal stripping by the host galaxy, or ram-pressure stripping by a tenuous hot halo (n_H = 3x10^{-4} cm^{-3} at 50 kpc). This model of evolution is able to explain the observed radial distribution of gas-deficient and gas-rich dwarfs around the Galaxy and M31 if the dwarfs fell in at high redshifts (z~3-10).
description: ApJ accepted. 32 pages, 11 figures
title: ÐÐ¿ÑÐ¸Ð¼Ð¸Ð·Ð°ÑÐ¸Ñ Ð¿Ð°ÑÐ°Ð¼ÐµÑÑÐ¾Ð² Ð½Ð°ÐºÐ¾Ð¿Ð¸ÑÐµÐ»Ñ ÑÐ»ÐµÐºÑÑÐ¾Ð¼Ð°Ð³Ð½Ð¸ÑÐ½Ð¾Ð¹ ÑÐ½ÐµÑÐ³Ð¸Ð¸ Ð¿Ð¾ ÐºÑÐ¸ÑÐµÑÐ¸ÑÐ¼ Ð¼Ð¸Ð½Ð¸Ð¼Ð°Ð»ÑÐ½ÑÑ Ð·Ð°ÑÑÐ°Ñ Ð¸ ÑÐ°Ð²Ð½Ð¾Ð¼ÐµÑÐ½Ð¾ÑÑÐ¸ Ð¿Ð¾ÑÑÐµÐ±Ð»ÐµÐ½Ð¸Ñ ÑÐ»ÐµÐºÑÑÐ¾ÑÐ½ÐµÑÐ³Ð¸Ð¸
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Optimization of battery parameters by the criteria of minimum cost and uniformity of power consumption
Creators: name: ÐÐ»ÐµÐºÑÐ°Ð½Ð´ÑÐ¾Ð², Ð¤ÐµÐ´Ð¾Ñ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2019
Subjects: ÐÐ°ÐºÐ¾Ð¿Ð¸ÑÐµÐ»Ð¸ ÑÐ½ÐµÑÐ³Ð¸Ð¸
ÐÐ°ÑÐµÐ¼Ð°ÑÐ¸ÑÐµÑÐºÐ¾Ðµ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ
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Ð­Ð»ÐµÐºÑÑÐ¸ÑÐµÑÐºÐ°Ñ ÑÐ½ÐµÑÐ³Ð¸Ñ
Ð°ÐºÐºÑÐ¼ÑÐ»ÑÑÐ¾ÑÐ½Ð¾Ðµ Ð¾Ð±Ð¾ÑÑÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ
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ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ°Ñ ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÑ

description: Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ð° Ð¸ Ð¿ÑÐ¾Ð°Ð½Ð°Ð»Ð¸Ð·Ð¸ÑÐ¾Ð²Ð°Ð½Ð° Ð¼Ð°ÑÐµÐ¼Ð°ÑÐ¸ÑÐµÑÐºÐ°Ñ Ð¼Ð¾Ð´ÐµÐ»Ñ Ð¾Ð±ÑÐµÐºÑÐ°, Ñ Ð¿Ð¾Ð¼Ð¾ÑÑÑ ÐºÐ¾ÑÐ¾ÑÐ¾Ð¹ ÑÐ´Ð°Ð»Ð¾ÑÑ ÑÐµÑÐ¸ÑÑ Ð·Ð°Ð´Ð°ÑÑ Ð¿Ð¾ ÐºÑÐ¸ÑÐµÑÐ¸ÑÐ¼ Ð¼Ð¸Ð½Ð¸Ð¼Ð°Ð»ÑÐ½Ð¾Ð¹ ÑÑÐ¾Ð¸Ð¼Ð¾ÑÑÐ¸ Ð¸ ÑÐ°Ð²Ð½Ð¾Ð¼ÐµÑÐ½Ð¾ÑÑÐ¸ Ð¿Ð¾ÑÑÐµÐ±Ð»ÐµÐ½Ð¸Ñ ÑÐ»ÐµÐºÑÑÐ¾ÑÐ½ÐµÑÐ³Ð¸Ð¸. ÐÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ð° Ð¾ÑÐµÐ½ÐºÐ° Ð¼Ð°ÐºÑÐ¸Ð¼Ð°Ð»ÑÐ½Ð¾Ð¹ Ð²Ð¾Ð·Ð¼Ð¾Ð¶Ð½Ð¾Ð¹ ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸Ð¸ Ð·Ð°ÑÑÐ°Ñ Ñ ÑÑÐµÑÐ¾Ð¼ ÑÑÐ¾Ð¸Ð¼Ð¾ÑÑÐ¸ Ð°ÐºÐºÑÐ¼ÑÐ»ÑÑÐ¾ÑÐ½Ð¾Ð³Ð¾ Ð¾Ð±Ð¾ÑÑÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¸ Ð±ÐµÐ· Ð½ÐµÐ³Ð¾. ÐÑÐ¾Ð¸Ð·Ð²ÐµÐ´ÐµÐ½ Ð°Ð½Ð°Ð»Ð¸Ð· ÑÐ°Ð²Ð½Ð¾Ð¼ÐµÑÐ½Ð¾Ð³Ð¾ Ð¿Ð¾ÑÑÐµÐ±Ð»ÐµÐ½Ð¸Ñ ÑÐ»ÐµÐºÑÑÐ¾ÑÐ½ÐµÑÐ³Ð¸Ð¸ Ñ Ð¿Ð¾Ð¼Ð¾ÑÑÑ Ð½Ð°ÐºÐ¾Ð¿Ð¸ÑÐµÐ»Ñ.
description: A mathematical model of the object was developed and analyzed with the help of which it was possible to solve the problem according to the criteria of minimum cost and uniformity of electricity consumption. The estimation of the maximum possible cost savings, taking into account the cost of battery equipment, and without it. The analysis of the uniform consumption of electricity using the battery.
Systematic study of the system size dependence of global stopping: Role of momentum dependent interactions and symmetry energy
Creators: name: Kumar, Sanjeev
name: Kumar, Suneel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Using the isospin-dependent quantum molecular dynamical (IQMD) model, we systematically study the role of momentum dependent interactions in global stopping and analyze the effect of symmetry energy in the presence of momentum dependent interactions. For this, we simulate the reactions by varying the total mass of the system from 80 to 394 at different beam energies from 30 to 1000 MeV/nucleon over central and semi-central geometries. The study is carried in the presence of momentum dependent interactions and symmetry energy by taking into account hard equation of state. The nuclear stopping is found to be sensitive towards the momentum dependent interactions and symmetry energy at low incident energies. The momentum dependent interactions are found to weaken the finite size effects in nuclear stopping.
description: 10 Pages and 3 figures
Crowdsourcing resilience : discourses of rape culture and sexual violence at the University of British Columbia
Creators: name: Marley, Eva
Publisher: name: University of British Columbia
Year: 2019

description: Responding to the Association for Feminist Anthropology’s call for a greater awareness of the prevalence of gender-based violence in our society, this project aims to analyze multiple public responses to two well-documented cases of sexual violence that occurred in 2013 at the University of British Columbia in Vancouver, Canada (McChesney and Singleton 2010). This thesis considers mediated responses to these incidents, including news articles, administrative reports, and social media as important sources from which to evaluate these incidents, with special attention paid to the concept of rape culture and claims of its perpetuation within the institution. Drawing from a poststructuralist feminist framework, I explore the interplay between silence and voice within conversations about sexual violence, examining whose voices are amplified or stifled when responding to incidents of sexual assault in higher education and how this phenomenon shapes resistance narratives. While this research is grounded in specific case studies within the context of one Canadian post-secondary institution, it ultimately has significance among colleges and universities across North America. In 2014, for example, the Obama administration launched the “It’s On Us” campaign to end campus sexual assault. In Canada, demands from the public for federal legislation to address violence against women have prompted significant expansions to sexual assault laws to protect survivors (Government of Canada 2014, Johnson and Colpitts 2013, Morris 2008, Sinha 2013). This growing focus on feminist anti-violence activism has spawned what I refer to as the “crowdsourcing of resilience,” or the process by which individuals craft virtual communities of support where they can then begin to cultivate hope, draft strategies for organizing collectively and promote social change.
title: ÐÑÐ¾Ð´Ð²Ð¸Ð¶ÐµÐ½Ð¸Ðµ Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¸ cÑÐµÑÑ Ð¾Ð±ÑÐµÑÑÐ²ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð¿Ð¸ÑÐ°Ð½Ð¸Ñ Ð² ÐÐ½ÑÐµÑÐ½ÐµÑÐµ ÑÑÐµÐ´ÑÑÐ²Ð°Ð¼Ð¸ Ð R Ð¸ ÑÐµÐºÐ»Ð°Ð¼Ñ (Ð½Ð° Ð¿ÑÐ¸Ð¼ÐµÑÐµ ÐÐÐ Â«ÐÐ¾Ð½ÐºÐ¾ÑÑÂ»)
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Promotion of the organization of the public sphere supply on the internet means of pr and advertising (on the example of Concort LLC)
Creators: name: Ð Ð°ÑÑÐ°Ð´Ð¸Ð½Ð°, ÐÐ½Ð½Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2021
Subjects: Ð¸Ð½ÑÐµÑÐ½ÐµÑ-Ð¿ÑÐ¾Ð´Ð²Ð¸Ð¶ÐµÐ½Ð¸Ðµ
Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ñ ÐÐÐ Â«ÐÐ¾Ð½ÐºÐ¾ÑÑÂ»
ÑÑÐµÑÐ° Ð¾Ð±ÑÐµÑÑÐ²ÐµÐ½Ð½ÑÑ ÑÑÐ»ÑÐ³
Ð¸Ð½ÑÑÑÑÐ¼ÐµÐ½ÑÑ ÑÐµÐºÐ»Ð°Ð¼Ñ Ð¸ PR
Ð¼Ð°ÑÐºÐµÑÐ¸Ð½Ð³
ÑÐ¾ÑÐ¸Ð°Ð»ÑÐ½Ð°Ñ ÑÐµÑÑ
ÐÐ¾Ð½ÑÐ°ÐºÑÐµ
Instagram
internet promotion
organization of "Concort" LLCc
public services
advertising and PR tools
marketing
social network
Vkontakte

description: ÐÐ°Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° Ð² Ð¿ÐµÑÐ²ÑÑ Ð¾ÑÐµÑÐµÐ´Ñ ÑÐ¿Ð¾ÑÐ¾Ð±Ð°Ð¼, Ð²Ð¾Ð·Ð¼Ð¾Ð¶Ð½Ð¾ÑÑÑÐ¼ Ð¸Ð½ÑÐµÑÐ½ÐµÑ-Ð¿ÑÐ¾Ð´Ð²Ð¸Ð¶ÐµÐ½Ð¸Ñ Ñ Ð¿Ð¾Ð¼Ð¾ÑÑÑ ÑÐµÐºÐ»Ð°Ð¼Ñ Ð¸ PR. Ð Ð¿ÑÐ¾ÑÐµÑÑÐµ ÑÐ°Ð±Ð¾ÑÑ Ð±ÑÐ»Ð¸ Ð¿Ð¾Ð»Ð½Ð¾ÑÑÑÑ Ð²ÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ñ ÑÐµÐ»Ð¸ Ð² Ð¸Ð·ÑÑÐµÐ½Ð¸Ð¸ ÑÑÑÐµÑÑÐ²ÑÑÑÐ¸Ñ ÑÐ¼ÐµÐ¶Ð½ÑÑ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ð¹, Ð¸Ð·ÑÑÐµÐ½Ð¸Ðµ Ð¾ÑÐ¾Ð±ÐµÐ½Ð½Ð¾ÑÑÐµÐ¹ Ð¸Ð½ÑÐµÑÐ½ÐµÑ-Ð¿ÑÐ¾Ð´Ð²Ð¸Ð¶ÐµÐ½Ð¸Ñ, Ð¾ÑÐ½Ð¾Ð²Ð½ÑÑ ÑÐµÐ½Ð´ÐµÐ½ÑÐ¸Ð¹ Ð² Ð¿ÑÐ¾Ð´Ð²Ð¸Ð¶ÐµÐ½Ð¸Ð¸ Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¹ ÑÑÐµÑÑ Ð¾Ð±ÑÐµÑÑÐ²ÐµÐ½Ð½ÑÑ ÑÑÐ»ÑÐ³, ÐºÐ¾Ð½ÐºÑÑÐµÐ½ÑÐ½ÑÐ¹ Ð°Ð½Ð°Ð»Ð¸Ð·, ÑÐ¸ÑÑÐ°ÑÐ¸Ð¾Ð½Ð½ÑÐ¹ Ð°Ð½Ð°Ð»Ð¸Ð· Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¸ ÐÐÐ Â«ÐÐ¾Ð½ÐºÐ¾ÑÑÂ», Ð° ÑÐ°ÐºÐ¶Ðµ Ð´ÐµÐ¹ÑÑÐ²ÑÑÑÐ¸Ñ Ð¼ÐµÑÐ¾Ð´Ð¾Ð² Ð¿ÑÐ¾Ð´Ð²Ð¸Ð¶ÐµÐ½Ð¸Ñ Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð¸ ÐºÐ¾Ð½ÐºÑÑÐµÐ½ÑÐ¾Ð² Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¸; Ð±ÑÐ» Ð¿ÑÐ¾Ð²ÐµÐ´ÑÐ½ Ð°Ð½Ð°Ð»Ð¸Ð· ÑÑÐ½ÐºÐ° ÑÑÐµÑÑ Ð¾Ð±ÑÐµÑÑÐ²ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð¿Ð¸ÑÐ°Ð½Ð¸Ñ Ð² 2020 Ð³Ð¾Ð´Ñ Ð² Ð Ð¾ÑÑÐ¸Ð¸ Ð¸ Ð·Ð° ÑÑÐ±ÐµÐ¶Ð¾Ð¼. ÐÑÐ¾Ð³Ð¾Ð¼ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ ÑÑÐ°Ð»Ð¸ ÑÑÐ¾ÑÐ¼Ð¸ÑÐ¾Ð²Ð°Ð½Ð½ÑÐµ Ð°Ð²ÑÐ¾ÑÐ¾Ð¼ Ð¿ÑÐ¾ÐµÐºÑÐ° Ð¿Ð¾ Ð¸Ð½ÑÐµÑÐ½ÐµÑ-Ð¿ÑÐ¾Ð´Ð²Ð¸Ð¶ÐµÐ½Ð¸Ñ Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¸ ÐÐÐ Â«ÐÐ¾Ð½ÐºÐ¾ÑÑÂ».
description: This work is primarily devoted to the methods and possibilities of Internet promotion through advertising and PR. In the course of the work, the objectives of studying existing related research, studying the features of Internet promotion, the main trends in the promotion of organizations in the field of public services, competitive analysis, situational analysis of the organization of LLC "Concort", as well as the current methods of promoting the organization and the organization's competitors were fully fulfilled; an analysis of the market of public catering in 2020 in Russia and abroad was conducted. The result of the study was formed by the author of the project on Internet promotion of the organization "Concort" LLC.
Frequency metrology in quantum degenerate helium: Direct measurement of the 2 3S1 - 2 1S0 transition
Creators: name: van Rooij, R.
name: Borbely, J. S.
name: Simonet, J.
name: Hoogerland, M. D.
name: Eikema, K. S. E.
name: Rozendaal, R. A.
name: Vassen, W.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Precision spectroscopy of simple atomic systems has refined our understanding of the fundamental laws of quantum physics. In particular, helium spectroscopy has played a crucial role in describing two-electron interactions, determining the fine-structure constant and extracting the size of the helium nucleus. Here we present a measurement of the doubly-forbidden 1557-nanometer transition connecting the two metastable states of helium (the lowest energy triplet state 2 3S1 and first excited singlet state 2 1S0), for which quantum electrodynamic and nuclear size effects are very strong. This transition is fourteen orders of magnitude weaker than the most predominantly measured transition in helium. Ultracold, sub-microkelvin, fermionic 3He and bosonic 4He atoms are used to obtain a precision of 8.10^{-12}, providing a stringent test of two-electron quantum electrodynamic theory and of nuclear few-body theory.
description: 14 pages, 6 figures
Clustering of obscured and unobscured quasars in the Bootes field: Placing rapidly growing black holes in the cosmic web
Creators: name: Hickox, Ryan C.
name: Myers, Adam D.
name: Brodwin, Mark
name: Alexander, David M.
name: Forman, William R.
name: Jones, Christine
name: Murray, Stephen S.
name: Brown, Michael J. I.
name: Cool, Richard J.
name: Assef, Roberto J.
name: Kochanek, Christopher S.
name: Dey, Arjun
name: Jannuzi, Buell T.
name: Eisenstein, Daniel
name: Eisenhardt, Peter R.
name: Gorjian, Varoujan
name: Stern, Daniel
name: Floc'h, Emeric Le
name: Caldwell, Nelson
name: Goulding, Andrew D.
name: Mullaney, James R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the first measurement of the spatial clustering of mid-infrared selected obscured and unobscured quasars, using a sample in the redshift range 0.7 < z < 1.8 selected from the 9 deg^2 Bootes multiwavelength survey. Recently the Spitzer Space Telescope and X-ray observations have revealed large populations of obscured quasars that have been inferred from models of the X-ray background and supermassive black hole evolution. To date, little is known about obscured quasar clustering, which allows us to measure the masses of their host dark matter halos and explore their role in the cosmic evolution of black holes and galaxies. In this study we use a sample of 806 mid-infrared selected quasars and ~250,000 galaxies to calculate the projected quasar-galaxy cross-correlation function w_p(R). The observed clustering yields characteristic dark matter halo masses of log (M_halo [h^-1 M_sun]) = 12.7^+0.4_-0.6 and 13.3^+0.3_-0.4 for unobscured quasars (QSO-1s) and obscured quasars (Obs-QSOs), respectively. The results for QSO-1s are in excellent agreement with previous measurements for optically-selected quasars, while we conclude that the Obs-QSOs are at least as strongly clustered as the QSO-1s. We test for the effects of photometric redshift errors on the optically-faint Obs-QSOs, and find that our method yields a robust lower limit on the clustering; photo-z errors may cause us to underestimate the clustering amplitude of the Obs-QSOs by at most ~20%. We compare our results to previous studies, and speculate on physical implications of stronger clustering for obscured quasars.
description: 18 emulateapj pages, 14 figures, 1 table; accepted for publication in ApJ
Properties of Fragmentation Photons in p+p Collisions at 200 GeV Center-of-Mass Energies
Creators: name: Hanks, Ali
Publisher: name: Zenodo
Year: 2010
Subjects: fragmentation
photon
correlations
jet
rgamma

description: This thesis reports results on the production of fragmentation photons within high energy proton-proton collisions. The hadron- fragmentation photon pair cross-section has been measured over a range of hadron and photon pT using the method of two-particle correlation. The fraction of inclusive hadron-photon pairs produced directly from the parton fragmentation was also determined from the cross-section measurement.
title: Σχεδιασμός υπαίθριων ανατινάξεων σε πετρώματα με εμπειρικές εξισώσεις και προγραμματισμό σε Η/Υ
Creators: name: Μαστορης Γεωργιος
Publisher: name: Technical University of Crete
Year: 2021

description: Ο σκοπός της συγκεκριμένης διπλωματικής, είναι η ανάπτυξη λογισμικού σε μορφή εφαρμογής για Η/Υ, για τον υπολογισμό διαφόρων παραμέτρων μίας υπαίθριας ανατίναξης. Επιγραμματικά να αναφερθεί, ότι είναι δυνατός ο υπολογισμός του φορτίου με 7 διαφορετικές εξισώσεις και ο αναλυτικότερος σχεδιασμός της ανατίναξης με δύο περιπτώσεις αυτών (Langefors, Konya). Επίσης, δίνεται η δυνατότατα προβολής των αποτελεσμάτων σε άξονες, είτε σε τρισδιάστατη μορφή, είτε σε δύο διαστάσεις, η δυνατότητα σύγκρισης περιπτώσεων και γραφημάτων, η εξαγωγή των αποτελεσμάτων σε υπολογιστικά φύλλα (spreadsheets) κ.α..

	Η εφαρμογή αυτή απευθύνεται κυρίως στους φοιτητές του τμήματος Μηχανικών Ορυκτών Πόρων του Πολυτεχνείου Κρήτης, ώστε μέσα από την γραφική απεικόνιση των αποτελεσμάτων, να κατανοήσουν ευκολότερα τις συγκεκριμένες έννοιες. Παρόλα αυτά, μπορεί η εφαρμογή να φανεί χρήσιμη και σε κάποιον μηχανικό, για μία πρώτη εκτίμηση μίας ανατίναξης, λόγο της ταχύτητας των υπολογισμών.

	Η εφαρμογή προγραμματίστηκε εξ΄ ολοκλήρου, στη MATLAB και με τα εργαλεία της για ανάπτυξη γραφικού περιβάλλοντος χρήστη, GUIDE και App Designer.
description: The purpose of this thesis, is the development of a software in the form of a computer application, for the calculation of various parameters for a surface blasting site. Briefly, the software is capable of calculating the burden with seven different equations and specifically design the surface blasting of a site with two of them (Langefors and Konya). Also, is capable of producing and depicting the results in 3D and 2D graphs, allows the comparison of the results and graphs, extract them in spreadsheets etc.
This computer application is addressed mainly for the students of the Mineral Resources Engineering department of Technical University of Crete, so that through the graphical visualization of the results can better understand the concepts of surface blasting. Nonetheless, it can be of use to an engineer, for a first evaluation of the parameters, due to the speed of the calculations.
The software was developed in total, in the MATLAB environment and programming language, with its tools for Graphical User Interface development (GUI), GUIDE and App Designer.
Simulating Object Weight in Virtual Reality: The Role of Absolute Mass and Weight Distributions
Creators: name: Kalus, Alexander
name: Klein, Johannes
name: Ho, Tien-Julian
name: Henze, Niels
Publisher: name: Universität Regensburg
Year: 2024
Subjects: subject: virtual reality, weight interfaces, weight perception, weight simulation, multisensory integration
subject: 004 Informatik
subject: Human-centered computing → Haptic devices
subject: Virtual reality

description: Weight interfaces enable users of Virtual Reality (VR) to perceive the weight of virtual objects, significantly enhancing realism and enjoyment. While research on these systems primarily focused on their implementation, little attention has been given to determining the weight to be rendered by them: As the perceived weight of objects is influenced not only by their absolute mass, but also by their weight distribution and prior expectations, it is currently unknown which simulated mass provides the most realistic representation of a given object. We conducted a study, in which 30 participants chose the best fitting weight for a virtual object in 54 experimental trials. Across these trials, we systematically varied the virtual objects’ visual mass (three levels), their weight distribution (six levels), and the position of the physical mass on the grip (three levels). Our Bayesian analysis suggests that the visual weight distribution of objects does not affect which absolute physical mass best represents them, whereas the position of the provided physical mass does. Additionally, participants overweighted virtual objects with lower visual mass while underweighting objects with higher visual mass. We discuss how these findings can be leveraged by designers of weight interfaces and VR experiences to optimize realism.
Slowing down of water dynamics in disaccharide aqueous solutions
Creators: name: Lerbret, Adrien
name: Affouard, Frederic
name: Bordat, Patrice
name: Hedoux, Alain
name: Guinet, Yannick
name: Descamps, Marc
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The dynamics of water in aqueous solutions of three homologous disaccharides, namely trehalose, maltose and sucrose, has been analyzed by means of molecular dynamics simulations in the 0-66 wt % concentration range. The low-frequency vibrational densities of states (VDOS) of water were compared with the susceptibilities chi" of 0-40 wt % solutions of trehalose in D2O obtained from complementary Raman scattering experiments. Both reveal that sugars significantly stiffen the local environments experienced by water. Accordingly, its translational diffusion coefficient decreases when the sugar concentration increases, as a result of an increase of water-water hydrogen bonds lifetimes and of the corresponding activation energies. This induced slowing down of water dynamics, ascribed to the numerous hydrogen bonds that sugars form with water, is strongly amplified at concentrations above 40 wt % by the percolation of the hydrogen bond network of sugars, and may partially explain their well-known stabilizing effect on proteins in aqueous solutions.
description: 14 pages, 4 figures, accepted in Journal of Non-Crystalline Solids (proceedings of the conference IDMRCS6)
Comparative chemical profiling, antimicrobial activity of Cyclospermum leptophyllum (Pers.) Sprague ex Britton and P. Wilson essential oil and evaluation of their integrative network pharmacology
Creators: name: Dev, Kapil
name: Sharma, Ritesh
name: Sharma, Sanjeev K.
name: Pati, Aparna Maitra
name: Agnihotri, Vijai K.
Publisher: name: Taylor & Francis
Year: 2025
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology

description: Cyclospermum leptophyllum is an annual herb of the Apiaceae family. This study aims to investigate the chemical compositions of C. leptophyllum aerial, fruits, leaves, and stem parts and evaluate their potential anti-microbial activity. For the identification and quantification of essential oil (EO) constituents gas chromatography-mass spectrometry and gas chromatography-flame ionisation detector techniques was used. The hydrodistillation of the aerial, stem, leaves, and fruit part resulted in (0.45–0.65)% v/w EOs yield. Altogether, twenty compounds were identified from all samples representing (99.45%–99.67%) of the total EOs composition. EOs composition were dominated by oxygenated monoterpenes (53.91%–89.77%) with thymohydroquinone dimethyl ether (37.91%–67.94%) present in major amounts in all four parts. Further, antimicrobial activity of the EOs were evaluated against six strains of bacteria and two fungal strains. To analyse the potential therapeutic effect of EO constituents network pharmacological approach was applied.
Novel Hierarchical Routing Protocols to Improve Event Detection in Wireless Sensor Networks
Creators: name: Al-Shammaa, Ameer A.
Publisher: name: University of Leicester
Year: 2021
Subjects: Uncategorized

description: The number of applications that depend on wireless sensor networks (WSNs) has risen recently. Since WSN applications are becoming more complex, more efficient routing protocols are needed. However, WSNs have limited resources in terms of restricted storage capacity, energy, and processing. The main goal of WSNs is to transmit the sensed data to the sink in an efficient way to achieve high degree of event detection reliability. The level of reliability required is determined by the nature of the application. Organising the network nodes into clusters is a common technique to improve reliability. Many clustering methods have been proposed, with LEACH (Low-Energy Adaptive Clustering Hierarchy) being the first. Many of these employ IEEE 802.15.4 which uses Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) as a technique to access the shared communication medium. However, for 802.15.4 (ZigBee) based systems CSMA/CA does not work well when the number of nodes is increased. In this thesis, firstly LEACH and direct transmission (DT) protocols are implemented and evaluated using up to 15 Waspmote wireless nodes with XBee-Pro S1 802.15.4 radio modules as a hardware testbed. These were used as a baseline to test the performance, in terms of event delivery ratio (VDR) and event reporting round time (RRT), of new clustering protocols (ToRRCH, and F-ToRRCH) which were developed to solve the conflicts between the events delivery reliability and the hardware constraints of WSNs. Clustering in both ToRRCH and F-ToRRCH are based on token ring transmission techniques. Results show that the worst VDR was achieved using DT, due to the deficiency of the backoff function in the CSMA/CA protocol implemented in the XBee-Pro S1 802.15.4 module. However, ToRRCH achieved a 100% VDR, but with longer RRT than LEACH and DT. The long RRT problem was solved by developing a new protocol called F-ToRRCH.
PERFORMANCE EVALUATION OF EMBANKMENT DAM AND REMEDIAL MEASURES  (CASE  OF KESEM EMBANKMENT DAM, AFAR  REGION,  ETHIOPIA)
Creators: name: Ashenafi Melka
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: Safety  of  earth  dams  depends  on  the  proper  design,  construction,  and  monitoring  of  actual
behavior during the construction and during the operation of the structure. The geotechnical and
geodetic monitoring besides providing a warning system in case of an abnormal behavior  of the
dam  may  be  used  as  a  tool  for  a  verification  of  design  parameters  where  geotechnical
parameters are of the highest importance by comparing results of monitoring measurements with
a prediction (deterministic). Geostudio software is one of geotechnical program that is  based on
the finite element and can consider analysis like stress-strain, seepage, slope stability, dynamic
analysis  and  also  fast  water  drop  in  reservoir  by  assume  different  mesh  size.  In  this  research
geostudio  has  been  used  to  analysis    the  stability  (seepage,  slope  stability  and  stress
deformation)  of  kesem  rock  fill  dam.  In  addition  to  stability  the  seepage  source  has  been
identified  using  daily  Electrical  conductivity  and  temperature  of  the  reservoir,  hot  spring,
ground water, right and left abutment seeped water data. The Result show that average flow rate
of leakage under the different mesh size for kesem dam equal  to  0.0159m
3
/s  for  the entire length
of the dam  and  Slope/W software is used under different conditions to evaluate slope stability
Analyzes  for  each  state  and  each  slope  with  Bishop,  Janbu,  ordinary  method  of  slides  and
Morgenstern  methods  is  calculated  and  compared  with  the  minimum  acceptable  safety  factor
provided from  United States army  of Corps. In the other hand  the mechanical behavior of kesem
rock fill was evaluated at the end of construction and a  two  dimensional  numerical analysis was
conducted  based  on  a  finite  element  method  on  the  largest  cross  section  of  the  dam.The  data
recorded  by the instruments located in the largest cross-section were compared with the results
of  the  numerical  analysis  at  the  place  of  instruments.  The  vertical  settlement  and  horizontal
displacment  was the parameters used for evaluating the dam  behavior at the end of construction
and  the  results  showed  that  the  settlements  obtained  from  the  numerical  analysis  were  in
reasonable agreement with the data recorded by the instruments.
PERFORMANCE  EVALUATION  OF  WONJI-SHOA  IRRIGATION  SCHEMES (CASE STUDY OF ULAGA IRRIGATION PROJECT)
Creators: name: ASHENAFI CHALA
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: Irrigation  schemes  are  usually  designed  and  implemented  on  the  basis  of  assumed
efficiencies in water application, water conveyance, and water distribution. However, over
time, physical changes in the schemes such as poor maintenance of structures, soil property
changes  and  deterioration  of  equipment  may  alter  these  efficiencies.  It  is  therefore
imperative  that  the  efficiencies  are  periodically  evaluated  as  a  way  of  monitoring  and
evaluating the irrigation scheme. The study was conducted to assess the performance of the
two wonji -Shoa expansion  irrigation schemes using  various  indicators such as output per
unit cropped area and water consumed, related to production with land and water. Relative
water supply (RWS), irrigation supply (RIS) and water delivery capacity (WDC), related to
water supply from the system with crop water demand. The irrigation schemes were Ulaga
zone100 and  Ulaga zone200. In this  study, the performance  indicators in  Ulaga zone100
and Ulaga zone200  Irrigation Scheme were determined for year 2013/14; the results were
discussed and evaluated.  Moreover, the research assesses the main problems in the major
component of dragline sprinkler systems, and suggest the possible solution.
The necessary primary and secondary data to calculate the eight  indicators were collected.
Primary data collection included daily field observation related to the conveyance systems,
measurement  of  the  actual  dimensions  of  the  conveyance  systems,  measurement   of  the
actual dimensions of the structure, measurement  of pressure at inlet of each field, Interview
of technical  experts and assistances, geographical coordinates (Longitudes & latitudes) of
the scheme.
The secondary data were collected  from Ethiopian Sugar Development Agency  Research
Center  and  from  Water  Works  Design  and  Supervision  Enterprise,  which  included
topographic  map  of  specific  site,  meteorological  and  Hydrological  data,  and  design
document of a scheme, total yields and investment costs.
Sequential measurements of conjugate observables
Creators: name: Carmeli, Claudio
name: Heinosaari, Teiko
name: Toigo, Alessandro
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We present a unified treatment of sequential measurements of two conjugate observables. Our approach is to derive a mathematical structure theorem for all the relevant covariant instruments. As a consequence of this result, we show that every Weyl-Heisenberg covariant observable can be implemented as a sequential measurement of two conjugate observables. This method is applicable both in finite and infinite dimensional Hilbert spaces, therefore covering sequential spin component measurements as well as position-momentum sequential measurements.
description: 25 pages
Cooking with Conversation: Enhancing User Engagement and Learning with a Knowledge-Enhancing Assistant
Creators: name: Frummet, Alexander
name: Speggiorin, Alessandro
name: Elsweiler, David
name: Leuski, Anton
name: Dalton, Jeff
Publisher: name: Universität Regensburg
Year: 2024
Subjects: subject: Conversational agents, interactive search, wizard-of-oz, conversational search
subject: 004 Informatik
subject: Information systems→Search interfaces; Collaborative search
subject: Human-centered computing→ Empirical studies in interaction design

description: We present two empirical studies to investigate users’ expectations and behaviours when using digital assistants, such as Alexa and Google Home, in a kitchen context: First, a survey (N = 200) queries participants on their expectations for the kinds of information that such systems should be able to provide. While consensus exists on expecting information about cooking steps and processes, younger participants who enjoy cooking express a higher likelihood of expecting details on food history or the science of cooking. In a follow-up Wizard-of-Oz study (N = 48), users were guided through the steps of a recipe either by an active wizard that alerted participants to information it could provide or a passive wizard who only answered questions that were provided by the user. The active policy led to almost double the number of conversational utterances and 1.5 times more knowledge-related user questions compared to the passive policy. Also, it resulted in 1.7 times more knowledge communicated than the passive policy. We discuss the findings in the context of related work and reveal implications for the design and use of such assistants for cooking and other purposes such as DIY and craft tasks, as well as the lessons we learned for evaluating such systems.
OPTIMAL WATER ALLOCATION AND WATER DEMAND ASSESSMENT: CASE STUDY BARO WATERSHED
Creators: name: DEBEBE DERIB
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: Watershed  is  considered  to  be  the  ideal  unit  for  management  of  the  natural  resources.
Extraction  of  watershed  parameters  using  (GIS)  and  use  of  mathematical  models  is  the
current trend for hydrologic evaluation of watersheds.
The aim of this thesis is to oversee the effect future water resource development projects on
the Baro watershed using SWAT models to assess water availability and WEAP mo dels in
assess the water demand of the study area.
The  SWAT  model  was  calibrated  and  validated  for  measured  stream  flow  at  Baro  near
Gambela  gauging  stations.  The  calibration  and  validation  result  showed  that  model
performance evaluation statistics (coefficient of determination (R
2
) and Nash-Sutcliffe model
efficiency  (ENS))  were  in  the  acceptable  range  (R
2
=0.76  ,E
NS  =0.72  for  calibration  and
R
2
=0.7,E
NS=0.63  for  validation).  This  indicates  that  the  observed  values  show  good
agreement  with  simulated  flow  value.  In  this  study  the  watershed  yields  average  annual
surface runoff of 425.07 mm.
Using WEAP, this study investigated the trend of supply and demand in Baro catchment . The
assessment  model  is  computed  based  on  two  scenarios,  Scenario1:  Irrigation  project
development  and  Scenario  2:  Extended  Dry  Climate  condition,  in  order  to  see  how  Baro
watershed responds to the supply of water resources. Based on the result, there will be unmet
demand in the years (2033-2034 and 2044-2045 for scenario 1) and (2033-2050 for scenario
2).  The  study  area  tends  to  experience  more  water  scarce  problem  in  the  second  scenario;
―Extended dry climate sequence‖ starting from the year 2033. there for a better water resource
management should perform to overcome this shortage.
Auswirkungen des Covid-19 Lockdowns auf Organisationen der Sucht- und Überlebenshilfe im Bereich Schadensminderung und deren Benutzer*innen: Handlungsempfehlungen für die Praxis der Sozialen Arbeit im Umgang zum möglichen «new-normal» der Pandemiesituation in der Suchtarbeit und Obdachlosenhilfe. Ergebnisse aus einer qualitativen Befragung in den Städten Luzern, Bern und Zürich.
Creators: name: Cadalbert, Ladina
name: Hürlimann, Simon
name: Tschümperlin, Angelina
Publisher: name: Zenodo
Year: 2021

description: Suchtmittelabhängige und/oder obdachlose Menschen stehen gemäss bestehender Fachliteratur in ihrem Alltag vielen Herausforderungen gegenüber. Darunter gehören finanzielle Probleme und der Kampf gegen Stigmata. Bei einer schweren Suchtmittelabhängigkeit dreht sich alles um die Beschaffung der Substanz. Bedürfnisse wie Nahrung und Schlaf stehen hinten an. Um diesen Menschen eine Unterstützung zu bieten, gibt es diverse Angebote von Organisationen im Bereich der Sucht- und Überlebenshilfe wie Notschlafstellen, Gassenküchen, Kontaktund Anlaufstellen, Drogen-Abgabestellen und Gassenarbeit. Durch die Covid-19 Pandemie und den Regelungen des Bundes, um diese zu bekämpfen, mussten viele Organisationen der Sucht- und Überlebenshilfe ihre Angebote anpassen. Diese Anpassungen führten unausweichlich zu Auswirkungen auf die Benutzer*innen. In der vorliegenden Bachelorarbeit gehen die Autor*innen den Fragen nach, wie die getroffenen Anpassungen in den verschiedenen Organisationen genau ausgesehen haben und welche bio-psycho-sozialen Auswirkungen diese auf die Benutzer*innen der Angebote hatten. Die Ergebnisse aus einer qualitativen Befragung bei Fachpersonen aus der Sucht- und Überlebenshilfe zeigen, dass die Anpassungen unterschiedlich angegangen wurden. Bezüglich bio-psycho-sozialen Auswirkungen auf die Benutzer*innen wurden einige Beobachtungen von den Fachpersonen geschildert. Diese Arbeit soll es den genannten Organisationen vereinfachen, in einem möglichen «new normal» dieser Pandemiesituation, ihre Angebote mit Blick auf die Benutzer*innen adäquat anzupassen und auch in Zukunft auf ähnliche Situationen reagieren zu können.
description: + Code Diss LU: hslusa basa + Code Diss LU: hslusa bask + Fussnote: Bachelor-Arbeit, Hochschule Luzern – Soziale Arbeit, Studienrichtung Sozialarbeit & Soziokultur, 2021 + NL-Code: NLLUHSA202110
Assessing Water Supply Coverage and Water Losses in Distribution  System: A Case Study of Debre Birhan Town, Ethiopia
Creators: name: Tesfaye Gebrehiyot
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: Safe drinking water is necessity  for  life.  Debre Birhan  town  is currently  facing water
shortage duo to the shortfall supply,  increasing water demand and  large expansion of
urbanization.  This  study  mainly  focuses  on  the  status  of  water  supply  coverage  and
losses in Debre Birhan town using statistical analyse, t echnical performance and water
audit  software.  A  statistical  analysis  was  applied  to  analyse  the  current  water  supply
coverage of the entire town and to develop distribution coverage  map using  Arc GIS
software. The technical performance measurement was eva luated by benchmarking the
design  document  and  current  states  of  utility.  Water  audit  software  was  also  used  to
analyze  water  loss  components  and  the  efficiency  of  the  system  was  evaluated  using
different performance indicators. Additionally discussions were made with stakeholders
to  support  the  quantitative  analysis  and  water  meter  test  to  quantify  the  water  loss.
From the result of the analysis, it was observed that the average daily per capita water
consumption of the town is 34  l/cap./day and the average in-house or yard connection
39%.  The  water  loss  is  relatively  medium  up  to  21.5%  of  system  input  volume.
Generally,  the results of this study emphasize the decision makers in utility to achieve
effective, efficient and sustainable water supply system.
title: Trockner-Theorie und Trockner-Systeme
Creators: name: Scheuter, Karl R.
Publisher: name: Keppler
Year: 1968

description: Hauptthema der Konferenz war der Offsetdruck in der Zeitungsherstellung. Dieser Beitrag befaßt sich im besonderen mit Trockeneinrichtungen, die im Hinblick auf den farbigen Zeitungsdruck immer wichtiger werden.
STABLITIY OF SLOPE AND SEEPAGE ANALYSIS IN EARTH FILL  DAMS USING NUMERICAL MODEL:  ACASE STUDY OF DORA  EMBANKMENT DAM, TIGRAY, ETHIOPIA
Creators: name: ASSEFA KIDANE ABERA
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: To  attain  the  primary  objective  of  seepage  and  slope  stability  analysis,  the  study  has  been
carried  out  based  on  primary  and  secondary  data  of  Dora  earth  fill  dam.  The  causes  of
seepage  problem  have  been  identified  using  geophysical  investigation  report  data  of  the
embankment and foundation, design document,  site investigation and construction history of
the dam.  Geo  studio  software  is  one  of  geotechnical  program  that  is  based  on  the  finite
element  and  can  consider  analysis  like  stress-strain,  seepage,  slope  stability,  dynamic
analysis  and  also  fast  water  drop  in  reservoir  by  assuming  different  mesh  size.  In  this
research  Geo  studiosoftware  has  been  used  to  calculate  seepage  and  slope  stability  of
Dora earth  fill  dam.  In this study seepage analysis  has  been done by seep/w software model
to  evaluate  the  total  f low  rate  through  the  dam  cross  section  using  three  cases  of  seepage
analysis  conditions.  And  case  three  or  seepage  analysis  at  normal  pool  level  based  on  the
rearranged soil hydraulic conductivity material is selected for further analysis and to put some
mitigation measure and the  result  show  that  average  flow   rate  of   leakage  under  the case
using  different  mesh  size  including  foundation   seepage  is  equal  to  0.079m
3
/s  for  the entire
length  of  the  dam.  This  value  is  compared  with  the  quantity  of  seepage  estimated
practically  at  the  down  stream  that  is  0.072m
3
/s.  Therefore,  the  practical  measurement
almost  has  some  uncertanity  of  quantifying  the  expected  quantity  of  seepage.  To  this  end,
problem  of  seepage  at  the  downstream  face  of  the  dam  which  are  threatening  the  dam
stability  are  expected  to  result  from  geology  where  the  dams  are  located  and  the  method
of  investigation  coupled  with  lack  of  experience  in  data  collection  and  analysis  and  also
considering  the  construction  history  are  the  major  factors  attributed  to  this  problem.  And
Slope/W  softw are  is  also  used  under  different  conditions  to  evaluate  slope  stability
calculation  for  each  state  and  each  slope  with  Bishop,  Janbu,  ordinary  method  of  slides
and  GLE  methods  is  calculated  and  compared  with  the  minimum  acceptable  safety  factor
provided  from  United  States  army  of  Corps  in  each  of  these  methods,  beconsidered  as  a
safety  factor  of  slope  stability.  To  alleviate  the  seepage  problem,  upstream impervious
blanketing,   downstream  berming  and  Provision  additional  shoulder  at  the  dawn  stream
dam surface with clayey gravel soil construction  are  the  proposed remedial  measures.
Divergence-free Interpolation of Vector Fields From Point Values - Exact divB=0 in Numerical Simulations
Creators: name: McNally, Colin P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: In astrophysical magnetohydrodynamics (MHD) and electrodynamics simulations, numerically enforcing the divB=0 constraint on the magnetic field has been difficult. We observe that for point-based discretization, as used in finite-difference type and pseudo-spectral methods, the divB=0 constraint can be satisfied entirely by a choice of interpolation used to define the derivatives of B. As an example we demonstrate a new class of finite-difference type derivative operators on a regular grid which has the divB=0 property. This principle clarifies the nature of divB != 0 errors. The principles and techniques demonstrated in this paper are particularly useful for the magnetic field, but can be applied to any vector field. This paper serves as a brief introduction to the method and demonstrates an implementation showing convergence.
description: MNRAS Letters accepted. 5 figures and 1 table
IMPACT OF CLIMATE CHANGE AND ASSESSMENT OF METEOROLOGICAL DROUGHT IN THE LIVELIHOOD OF PEOPLE IN GAMO-GOFA, SOUTHERN ETHIOPIA
Creators: name: ASHAIBIR ASHAGRE
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: Global climate change is real and accepted universally as an anatomy of the silent crises. Gamo
Gofa mainly based on rain fed agriculture, which is prone to varieties of weather and climate
shocks.  The  aim  of  this  research  is  projections  of  climate  change  and  assessment  of
meteorological drought in five districts of Gamo-Gofa zone, Southern Ethiopia. Instruments used
in  this  study  are: Arc  GIS  9.3  version  to  locate  study  areas;  SDSM,  HADCM3  General
Circulation Model (GCM) with (A2a , B2a) emission scenarios (predictors) and SPI for drought
analysis and cropwat8.0 for crop yields. The increase in mean maximum and precipitation are
projected as 0.102
0
C and 7.88%, 0.504
0
C and 29.31%, 1.6
0
C and 73.5% respectively in 2020s,
2050s  and  2080s  for  the  base  period  (1984-2013).  Besides  deforestation,  charcoal  ( kasele)
production population growth and agricultural land expansions were indicters of climate change
and drought. Drought is a slow onset phenomenon that affects people’s socio-economic activities
to a great extent. It is one of the most dangerous natural hazards because it is very difficult to
identify its onset. In Ethiopia, Gamo-Gofa is one of the states which face drought generally once
in  three  years.  Monitoring  of  drought  by  various  drought  indices  has  a  great  potential  in
mitigation the future droughts. SPI has been used to monitor drought in five districts, Gamo
Gofa, Ethiopia. It has been calculated for 3-month, 6-month, 12- month and 24-month time
scales to decide the effect of rainfall scarcity on the various natural resources. The SPI value will
give information about drought characteristics i.e. A real extent, Duration, Magnitude, Severity,
average duration of drought intensity and spatial extent for five districts are assessed. The
monthly rainfall data of 5 rainfall stations named Kamba, Geresse, Arba minch, Chancha and
Mirab Abya, has been collected for the period of 1974-2013 to calculate SPI. The results suggest
that Gamo-Gofa Zone had felt severe drought in 1990 Arba Minch Station. On an average there
is a condition of Mild drought in Gamo-Gofa zone once in three years. It can be also concluded
that since 2009 Gamo-Gofa zone has not felt any severe drought. The recent drought during
1974-2013 results indicate that with an increase in return period and time scale, the duration of
drought will be increased. In addition cropwat8.0 is used for yield reduction for drought years.