cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A Knowledge base model for complex forging die machining
Creators: name: Mawussi, Kwamiwi
name: Tapie, Laurent Pierre
Publisher: name: arXiv
Year: 2011
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: Recent evolutions on forging process induce more complex shape on forging die. These evolutions, combined with High Speed Machining (HSM) process of forging die lead to important increase in time for machining preparation. In this context, an original approach for generating machining process based on machining knowledge is proposed in this paper. The core of this approach is to decompose a CAD model of complex forging die in geometric features. Technological data and topological relations are aggregated to a geometric feature in order to create machining features. Technological data, such as material, surface roughness and form tolerance are defined during forging process and dies design. These data are used to choose cutting tools and machining strategies. Topological relations define relative positions between the surfaces of the die CAD model. After machining features identification cutting tools and machining strategies currently used in HSM of forging die, are associated to them in order to generate machining sequences. A machining process model is proposed to formalize the links between information imbedded in the machining features and the parameters of cutting tools and machining strategies. At last machining sequences are grouped and ordered to generate the complete die machining process. In this paper the identification of geometrical features is detailed. Geometrical features identification is based on machining knowledge formalization which is translated in the generation of maps from STL models. A map based on the contact area between cutting tools and die shape gives basic geometrical features which are connected or not according to the continuity maps. The proposed approach is illustrated by an application on an industrial study case which was accomplished as part of collaboration.
Additional file 1 of Auto3DCryoMap: an automated particle alignment approach for 3D cryo-EM density map reconstruction
Creators: name: Al-Azzawi, Adil
name: Ouadou, Anes
name: Duan, Ye
name: Cheng, Jianlin
Publisher: name: figshare
Year: 2020
Subjects: subject: Artificial Intelligence and Image Processing
subject: FOS: Computer and information sciences

description: Additional file 1. The supplementary data of Auto3DCryoMap.
Resilienzförderung in Kindertagesstätten: Resilienzentwicklung, -forschung, Prävention & professionelle Unterstützung im Betreuungskontext
Creators: name: Bolender, Paul Friedrich
Publisher: name: Zenodo
Year: 2021

description: Ziel der vorliegenden Bachelorarbeit ist es, die Resilienzentwicklung- und -förderung im Kontext der pädagogischen Praxis in Kindertagesstätten zu betrachten und entsprechende Fördermöglichkeiten aufzuzeigen. Dazu wird über die Entwicklung der Resilienzforschung, Einflussfaktoren der Resilienzentwicklung und verschiedenen Resilienzmodellen hin zu Unterstützungsmöglichkeiten der Fachpersonen in Kindertagesstätten geführt. Um dieses Ziel zu erreichen, wird auf verschiedene Fachliteraturwerke zurückgegriffen, welche Informationen zu aktuellen Forschungsständen, Präventions- und Interventionsmöglichkeiten beinhalten. Die Ergebnisse zeigen, dass eine frühzeitige, präventive Resilienzförderung durch adäquate Unterstützung, Förderung und den Einbezug mehrerer Ebenen in der Lebenswelt des Kindes einen Mehrwehrt für die kindliche Entwicklung schöpfen können, wenngleich noch Forschungsfragen bezüglich differenzierten Wirkmechanismen in der Resilienzentwicklung offenbleiben. Schlüsselworte: Resilienz, Kindheit, Kindertagesstätte, Resilienzforschung, Soziale Arbeit, Salutogenese, psychische Widerstandsfähigkeit, Resilienzentwicklung, Risikofaktor, Schutzfaktor, Resilienzfakto
description: + Code Diss LU: hslusa basp + Fussnote: Bachelor-Arbeit, Hochschule Luzern – Soziale Arbeit, Studienrichtung Sozialpädagogik, 2021 + NL-Code: NLLUHSA202110
Disentangling Cooper-pair formation above Tc from the pseudogap state in the cuprates
Creators: name: Kondo, Takeshi
name: Hamaya, Yoichiro
name: Palczewski, Ari D.
name: Takeuchi, Tsunehiro
name: Wen, J. S.
name: Xu, Z. J.
name: Gu, Genda
name: Schmalian, Joerg
name: Kaminski, Adam
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The discovery of the pseudogap in the cuprates created significant excitement amongst physicists as it was believed to be a signature of pairing, in some cases well above the room temperature. In this "pre-formed pairs" scenario, the formation of pairs without quantum phase rigidity occurs below T*. These pairs condense and develop phase coherence only below Tc. In contrast, several recent experiments reported that the pseudogap and superconducting states are characterized by two different energy scales, pointing to a scenario, where the two compete. However a number of transport, magnetic, thermodynamic and tunneling spectroscopy experiments consistently detect a signature of phase-fluctuating superconductivity above leaving open the question of whether the pseudogap is caused by pair formation or not. Here we report the discovery of a spectroscopic signature of pair formation and demonstrate that in a region of the phase diagram commonly referred to as the "pseudogap", two distinct states coexist: one that persists to an intermediate temperature Tpair and a second that extends up to T*. The first state is characterized by a doping independent scaling behavior and is due to pairing above Tc, but significantly below T*. The second state is the "proper" pseudogap - characterized by a "checker board" pattern in STM images, the absence of pair formation, and is likely linked to Mott physics of pristine CuO2 planes. Tpair has a universal value around 130-150K even for materials with very different Tc, likely setting limit on highest, attainable Tc in cuprates. The observed universal scaling behavior with respect to Tpair indicates a breakdown of the classical picture of phase fluctuations in the cuprates.
description: 9 pages, 4 figures
title: Ð¥ÑÐ´Ð¾Ð¶ÐµÑÑÐ²ÐµÐ½Ð½Ð°Ñ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ñ Ð¾Ð±ÑÐ°Ð·Ð° Ð Ð¾ÑÑÐ¸Ð¹ÑÐºÐ¾Ð¹ Ð¸Ð¼Ð¿ÐµÑÐ¸Ð¸ Ð² ÑÐ¾Ð¼Ð°Ð½Ðµ ÐÐ¸ ÐÐ°ÑÐ´ÑÐ³Ð¾ Â«Ð¢ÐµÐ½Ñ Ð¸ ÐºÐ¾ÑÑ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: Artistic realization of the image of the Russian empire in Leegh Bardugo's novel "Shadow and bone"
Creators: name: ÐÑÑÑÐ¾Ð²Ð°, ÐÑÐ¸Ð½Ð°
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: 2022
Subjects: Ð»Ð¸ÑÐµÑÐ°ÑÑÑÐ½ÑÐ¹ Ð¾Ð±ÑÐ°Ð·
Ð¼Ð¾ÑÐ¸Ð²
ÑÐºÐ°Ð½Ð´Ð¸Ð½Ð°Ð²ÑÐºÐ°Ñ Ð¼Ð¸ÑÐ¾Ð»Ð¾Ð³Ð¸Ñ
ÑÐ»Ð°Ð²ÑÐ½ÑÐºÐ°Ñ Ð¼Ð¸ÑÐ¾Ð»Ð¾Ð³Ð¸Ñ
Ð Ð¾ÑÑÐ¸Ð¹ÑÐºÐ°Ñ Ð¸Ð¼Ð¿ÐµÑÐ¸Ñ
ÐÐ¸ ÐÐ°ÑÐ´ÑÐ³Ð¾
literary image
motive
scandinavian mythology
slavic mythology
Russian empire
Leegh Bardugo

description: ÐÐ°Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° Ð°Ð½Ð°Ð»Ð¸Ð·Ñ Ð¸Ð½ÑÐµÑÐ¿ÑÐµÑÐ°ÑÐ¸Ð¸ ÑÐµÐ°Ð»Ð¸Ð¹ Ð Ð¾ÑÑÐ¸Ð¹ÑÐºÐ¾Ð¹ Ð¸Ð¼Ð¿ÐµÑÐ¸Ð¸ Ð² ÑÐ²Ð¾ÑÑÐµÑÑÐ²Ðµ Ð°Ð¼ÐµÑÐ¸ÐºÐ°Ð½ÑÐºÐ¾Ð¹ Ð¿Ð¸ÑÐ°ÑÐµÐ»ÑÐ½Ð¸ÑÑ ÐÐ¸ ÐÐ°ÑÐ´ÑÐ³Ð¾. Ð ÑÐ¾Ð´Ðµ ÑÐ°Ð±Ð¾ÑÑ Ð±ÑÐ»Ð¸ Ð¸Ð·ÑÑÐµÐ½Ñ ÑÐ¿Ð¾ÑÐ¾Ð±Ñ Ð¸Ð½ÑÐµÑÐ¿ÑÐµÑÐ°ÑÐ¸Ð¸ ÑÐµÐ°Ð»Ð¸Ð¹ Ð² ÑÐ¾Ð¼Ð°Ð½Ð°Ñ ÐÐ¶. ÐÐ°ÑÑÐ¸Ð½Ð° Ð¸ ÐÐ¶. Ð . Ð . Ð¢Ð¾Ð»ÐºÐ¸ÐµÐ½Ð° Ð¸ ÑÑÐ°Ð²Ð½ÐµÐ½Ñ Ñ Ð¸Ð½ÑÐµÑÐ¿ÑÐµÑÐ°ÑÐ¸ÐµÐ¹ ÐÐ°ÑÐ´ÑÐ³Ð¾. ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð½Ð°Ð¿ÑÐ°Ð²Ð»ÐµÐ½Ð¾ Ð½Ð° Ð°Ð½Ð°Ð»Ð¸Ð· ÑÐ¿Ð¾ÑÐ¾Ð±Ð¾Ð² ÑÐ¾Ð·Ð´Ð°Ð½Ð¸Ñ Ð²ÑÐ¼ÑÑÐ»ÐµÐ½Ð½ÑÑ Ð³Ð¾ÑÑÐ´Ð°ÑÑÑÐ² Ð² ÑÐ²Ð¾ÑÑÐµÑÑÐ²Ð¾ ÐÐ¸ ÐÐ°ÑÐ´ÑÐ³Ð¾. Ð ÑÐ¾Ð´Ðµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð±ÑÐ»Ð¸ Ð²ÑÑÐ²Ð»ÐµÐ½Ñ Ð¾ÑÐ¾Ð±ÐµÐ½Ð½Ð¾ÑÑÐ¸ Ð² Ð¸Ð½ÑÐµÑÐ¿ÑÐµÑÐ°ÑÐ¸Ð¸ ÐºÑÐ»ÑÑÑÑÐ½ÑÑ Ð¸ Ð¸ÑÑÐ¾ÑÐ¸ÑÐµÑÐºÐ¸Ñ Ð¼Ð¾ÑÐ¸Ð²Ð¾Ð² Ð Ð¾ÑÑÐ¸Ð¹ÑÐºÐ¾Ð¹ Ð¸Ð¼Ð¿ÐµÑÐ¸Ð¸Â Ð² Ð¿ÑÐ¾Ð¸Ð·Ð²ÐµÐ´ÐµÐ½Ð¸ÑÑ ÐÐ¸ ÐÐ°ÑÐ´ÑÐ³Ð¾ Ð¸Ð· ÑÐ¸ÐºÐ»Ð° Â«Ð¢ÐµÐ½Ñ Ð¸ ÐºÐ¾ÑÑÑÂ».
description: The paper is devoted to the analysis of the interpretation of the motives of the Russian Empire in the work of the American writer Lee Bardugo. Following ways of interpreting realities in the novels of G. Martin and J. R. R. Tolkien have been considered and compared with Bardugoâs interpretation. The research is dedicated to analyzing the ways of creating fictional states in the work of Leegh Bardugo. The study revealed features in the interpretation of the cultural and historical motives of the Russian Empire in the works of Leegh Bardugo from the cycle âShadow and Boneâ.
Hydropower Potential of Tendaho Irrigation Hydropower Potential of Tendaho Irrigation Earth Dam Dam
Creators: name: Ashenafi Wondimu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2014

description: In rural areas of Ethiopia, modern forms of energy are not available.  Traditional sources such as
fuel wood, cow dung, and crop residue are being depleted rapidly thereby deepening the rural
energy crisis. Compared with other new and renewable sources of energy, hydropower has been
recognized  as  being  a  viable  and  mature technology.  It  can  be  applied  immediately  on  an
economic  scale  in  a  flexible  manner  and  can  comparatively  easily  bring  benefits  to  the
population in isolated areas, who are so far not covered by national electricity supply grid.
Only less than one percent of the rural population, which is eighty two percent, of Ethiopia has
access to electricity. However, a number of irrigation dams have been constructed and planned
for implementation  which  could  generate  and provide  electricity  to  the  rural  population  in
addition to its irrigation requirement.
A case study regarding generating hydropower had been conducted on Tendaho dam, which is
one  of irrigation  earth  dams  in  Afar  Regional  State  so  as to  integrate  it  with hydropower.
Accordingly a number of objectives were accomplished like collecting, processing and analyzing
meteorological data, collecting and preparing input data for the DP model, establishing reservoir
operation rule curve, formulation of discrete dynamic programming model.
A  Visual  Basic  Program was  written  to  solve  the  DP  model.  The  main  results obtained  were
monthly  energy  output,  energy  output  duration  curve  and optimal  reservoir  operation  guide
curve. The  yearly average energy production for the mean monthly inflow data is found to be
7563.47 MWh.
The  results  of  this  study  showed  that  it  is  possible  to  produce  a  valuable  amount  of  electric
energy  that  is  very  useful  in  electrifying  the  rural community without  affecting  its  irrigation
service by applying systems engineering as a planning tool. Based on the findings, conclusions
and recommendations for further studies are drawn.
Spiking Neurons with ASNN Based-Methods for the Neural Block Cipher
Creators: name: Al-Omari, Saleh Ali K.
name: Sumari, Putra
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cryptography and Security (cs.CR)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: Problem statement: This paper examines Artificial Spiking Neural Network (ASNN) which inter-connects group of artificial neurons that uses a mathematical model with the aid of block cipher. The aim of undertaken this research is to come up with a block cipher where by the keys are randomly generated by ASNN which can then have any variable block length. This will show the private key is kept and do not have to be exchange to the other side of the communication channel so it present a more secure procedure of key scheduling. The process enables for a faster change in encryption keys and a network level encryption to be implemented at a high speed without the headache of factorization. Approach: The block cipher is converted in public cryptosystem and had a low level of vulnerability to attack from brute, and moreover can able to defend against linear attacks since the Artificial Neural Networks (ANN) architecture convey non-linearity to the encryption/decryption procedures. Result: In this paper is present to use the Spiking Neural Networks (SNNs) with spiking neurons as its basic unit. The timing for the SNNs is considered and the output is encoded in 1's and 0's depending on the occurrence or not occurrence of spikes as well as the spiking neural networks use a sign function as activation function, and present the weights and the filter coefficients to be adjust, having more degrees of freedom than the classical neural networks. Conclusion: In conclusion therefore, encryption algorithm can be deployed in communication and security applications where data transfers are most crucial. So this paper, the neural block cipher proposed where the keys are generated by the SNN and the seed is considered the public key which generates the both keys on both sides In future therefore a new research will be conducted on the Spiking Neural Network (SNN) impacts on communication.
description: 11 pages, 4 Figures, International journal of computer science & information Technology
HYDRAULICS MODELING OF WATER SUPPLY DISTRIBUTION FOR  SELADINGAY TOWN SYSTEM UPGRADING
Creators: name: BEFEKADU HAILU ALEMU
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: The main objective of this study is to improve the performance of Seladingay town water
supply  distribution  system  and  control  its  operation  with  the  aid  of  computer  analysis.
The approaches adopted for the system components to perform the model, existing water
distribution  system  and  other  related  available  data  has  been  collected  like  number  of
population and institutions, topography of the study area, the type of water sources and its
yield,  collect  surveying  data  like  x,  y  coordinate,  elevation  and  distance  by  using  total
station,  the  collected  data  like  type  of  pipe  material,  length  of  pipe,  demand,  pipe
diameter and elevation have been entered into the built model,  then  simulated  for single
period and extended period using different scenarios.  The model analysis result showed
the different problems of the system. These are oversized and undersized pipes, and high
pressures in existing system caused by customers at too low demand have been identified
and  solution  is  established  using  pressure-reducing  valves.  Comparing  representative
samples  of  distribution  main’s  pressure  field-test  with  the  model-simulated  values
showed a reasonable and small difference to calibrate the model. Finally, 21% of the total
distribution  mains  are  modified  and  development  of  Seladingay  town  distribution
network scenarios.  The  existing  system  has been evaluated in reality  depending on the
existing  situation  of  operating  the  different  parts  of  the  network  head  loss,  velocity  of
flow and pressure in water distribution system has  been determined using Water CAD,
and also the water distribution system layout has been prepared using the surveyed data.
Quantum kinetic theory model of a continuous atom laser
Creators: name: Dennis, G. R.
name: Davis, Matthew J.
name: Hope, J. J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We investigate the feasible limits for realising a continuously evaporated atom laser with high-temperature sources. A plausible scheme for realising a truly continuous atom laser is to outcouple atoms from a partially condensed Bose gas, whilst continuously reloading the system with non-condensed thermal atoms and performing evaporative cooling. Here we use quantum kinetic theory to model this system and estimate feasible limits for the operation of such a scheme. For sufficiently high temperatures, the figure of merit for the source is shown to be the phase-space flux. The dominant process limiting the usage of sources with low phase-space flux is the three-body loss of the condensed gas. We conclude that certain double-magneto-optical trap (MOT) sources may produce substantial mean condensate numbers through continuous evaporation, and provide an atom laser source with a narrow linewidth and reasonable flux.
description: 28 pages, 5 figures
Additional file 4 of Characterization of genome-wide association study data reveals spatiotemporal heterogeneity of mental disorders
Creators: name: Yulin Dai
name: O’Brien, Timothy D.
name: Guangsheng Pei
name: Zhongming Zhao
name: Peilin Jia
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 4. GO enrichment for genes (non MHC genes) in the top 10 significant modules. Gene ontology term enrichment (biological process) analysis for five mental disorders in 12 spatiotemporal points. The top three GO terms were listed on the right for each spatiotemporal point in the order of “black”, “red”, and “blue”. Green dash indicated –log10 (p-value) after Bonferroni correction of all BP terms (2740). (A) ADHD: attention deficit hyperactivity disorder; (B) ASD: autism spectrum disorder; (C) BIP: bipolar disorder; (D) MDD: major depressive disorder; (E) SCZ: schizophrenia; FC: frontal cortex region, SM: sensory motor region, SC: sub-cortical region, TP: temporal-parietal cortex region, ST1: stage 1 (prenatal), ST2: stage 2 (after birth to 11 years old), ST3: stage 3 (older than 13 years)
Groundwater-Surface Water Interaction and possible changes  due to Climate Change Tana Basin, Upper Abay River Basin
Creators: name: Mulugeta Admas Gerb
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2010

description: The  objective  of  this  thesis  is  to  quantify  groundwater-surface  water  interaction  and  to
detect  climate change  impact on the  interaction  of the  Tana  Basin, Upper Abbay  Basin
Ethiopia.  ArcSwat  2.3.3 model is used for the estimation of surface  water balance both
for  the  observed  climate  stations  and  future  Regional  climate  Models  (RCM)  climate
output  scenarios  of  time  periods  (2031–2040  and  2091–2000)  .From  SWAT  outputs
developed future  climate scenarios  have  both increasing and decreasing effects  in space
and time  for surface runoff,  but   decreasing  trend  in  deep  aquifer recharges  for all  sub
basins.
A  three-dimensional  transient  groundwater  flow  model  ,Modflow  2000,has   been  used
to  quantify  groundwater-surface  water  interaction  on  those  major  Rivers
Gumar,Rib,Megech and Gilgel Abay    for  both the      baseline period and    future climate
scenarios  of  the  top  unconfined  aquifer  Tana  basin   .Perturbing  groundwater  recharge
output  from  SWAT  model  for  climate  scenarios  the  base  period  (1990s)  and  future
climate  scenarios  (2030s  and  2090s).As  that  of  recharge  simulated  from  SWAT  model
decreases  to  the  future  climates  ,groundwater  contributing  to  the  streams  depicts
reduction  .  Climates  exert  larger  percentage  variation  on  surface  runoff  compared  to
groundwater-surface water interaction.
Assessment of The Impact of Climate Change on Surface  Hydrological Processes Using GIS Based Hydrological Model  (Case Study of Omo Gibe River Basi, Ethiopia).
Creators: name: Shiferaw Eromo Chaemiso (BS.C)
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2014

description: Climate Change impact are assessed by the General circulation Model. GCM output simulation
have  systematic  errors  called  Bias  ,which  need  to  be  corrected  The  bias  correction  of
precipitation and temperature leads to reasonable result in hydrological impact studies . Physicalbased,  semi-distributed  hydrological  models,  ArcSWAT,  was  utilized  to  simulate  hydrological
responses to land use and climatic changes. Stream-flow data at the outlet of the watershed was
utilized  to  analyze  seasonal  stream  flow  variability.  The  performance  of  the  model  has  been
evaluated through sensitivity analysis, calibration, validation and uncertainty analysis. The  case
study  was  applied  on  Omo-Gibe  river  basin,  Ethiopia.  Among  the  most  sensitive  parameters
governing runoff generation process, in the studied Basin, were CN2, ALPHA_BF and ESCO etc
. The overall evaluation indicated that the SWAT model satisfactorily simulates river flows in
the study  catchments with limited data availability and where global spatial data are appropriate.
By using input data used for SWAT model calibration, and validation, whereby the gauged flows
in the Gojeb and Great Gibe water sub-catchments are the calibration targets. Calibration and
validation processes were undertaken using the Parasol and manual methods of SWAT2005, and
the SUFI-2 methods of SWAT-CUP. Time series plots, as well as statistical measures, such as
the Nash-Sutcliffe efficiency (NSE) and the coefficient of determination (R
2
) between observed
and  simulated  stream  flows  are  computed  on  daily  or  monthly  time  scales  and  indicate  a
goodperformance of the final calibrated SWAT model. In monthly time scales Great Gibe Abelti
gauging station the R
2
was found to be 72.4%,and NSE. = 62.6 % for calibration and the R
2
was
found  to  be  68.1%,and  NSE.  =  68  %  for  validation.  This  shows  the  simulation’s  very  good
correlation  with  the  gauged  flow.SUFI-2,  algorithms  gave  good  results  in  minimizing  the
differences between observed and simulated flow in the Great Gibe sub-basin. The p-factor and
r-factor computed using SUFI-2 gave good result performance more than 60% of the observed
and  simulated  data  under  calibration  and  validation.  The  studies  show  that  there  is  an  overall
increasing  trend  in  annual  temperature  and  significant  variation  of  monthly  and  seasonal
precipitation  from  the  base  period  1985  to  2005  level.  The  results  indicate  that  the  annual
potential evapotranspiration (PEV) will show increasing trend for both future climate scenario.
The study makes the recommendation that SWAT model can be effectively used for assessing
the water balance components of a river basin
Relaxation time distributions for an anomalously diffusing particle
Creators: name: Pottier, Noëlle
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: As well known, the generalized Langevin equation with a memory kernel decreasing at large times as an inverse power law of time describes the motion of an anomalously diffusing particle. Here, we focus attention on some new aspects of the dynamics, successively considering the memory kernel, the particle's mean velocity, and the scattering function. All these quantities are studied from a unique angle, namely, the discussion of the possible existence of a distribution of relaxation times characterizing their time decay. Although a very popular concept, a relaxation time distribution cannot be associated with any time-decreasing quantity (from a mathematical point of view, the decay has to be described by a completely monotonic function). Technically, we use a memory kernel decaying as a Mittag-Leffler function (the Mittag-Leffler functions interpolate between stretched or compressed exponential behaviour at short times and inverse power law behaviour at large times). We show that, in the case of a subdiffusive motion, relaxation time distributions can be defined for the memory kernel and for the scattering function, but not for the particle's mean velocity. The situation is opposite in the superdiffusive case.
description: 17 pages
SEDIMENT YIELD ESTIMATION FROM UPPER AWASH  WATERSHED: SEDIMENTATION IN TO KOKA RESERVOIR, ETHIOPIA
Creators: name: SUFIYAN ABDULMENAN
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2014

description: Poor  land  use  practices  and  improper  management  systems  have  played  a  significant  role  in
causing high soil erosion rates, sediment transport and loss of agricultural nutrients. SWAT (Soil
and  Water  Assessment  Tool),  the  comprehensive  and  semi-distributed  river  basin  model  that
requires a large number of input parameters, was used to simulate the sediment yield from the
upper Awash watershed (Area 1156.048 km
2
), located at central Ethiopia. The purpose of the
study was to predict the sediment yield from the watershed and to evaluate the sediment inflow in
to  Koka reservoir. The simulation was done by dividing the watershed into 38 sub watersheds
and by assigning a hydrological response unit based on multiple HRU definition. The manual
and  automated  calibration  processes  were  used  to  calibrate  the  model  parameters  using  time
series data from 1989 to 2000. Data from 2001 to 2005 were used to validate the model using
the  input  parameter  set.  Time  series  plots  and  the  statistical  measures  of  coefficient  of
determination  (R
2
),  Nash-Sutcliffe  efficiency  (ENS)  and  PBIAS  were  used  to  evaluate  the
performance of the model. The predicted and observed sediment yields generally matched well.
The  results  of  the  model  calibration  and  validation  showed  reliable  estimates  of  monthly
sediment yield with R
2
= 0.80, ENS= 0.79 and PBIAS=0.16 during the calibration period and
R
2
=0.80,  ENS=0.77  and  PBIAS=0.19  during  the  validation  period.  The  model  was
underestimated  the  sediment  yield  by  16%  &  19%  during  calibration  and  validation  period
respectively. The result of the simulation was illustrates the potential sediment generating sub
basins that needs urgent management or conservation measures.
title: ÐÑÐ¾ÐµÐºÑ Ð¶Ð¸Ð»Ð¾Ð³Ð¾ Ð´Ð¾Ð¼Ð°
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: Residential building project
Creators: name: ÐÐµÐ´Ð²ÐµÐ´ÐµÐ², ÐÐ¸ÐºÐ¸ÑÐ°
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: Ð¼Ð°Ð»Ð¾ÑÑÐ°Ð¶Ð½Ð¾Ðµ ÑÑÑÐ¾Ð¸ÑÐµÐ»ÑÑÑÐ²Ð¾
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Ð°ir hÐµÐ°ting
sÐµlÐµÑtiÐ¾n Ð¾f ÐµnÑlÐ¾sing struÑturÐµs
ventilation system

description: Ð¦ÐµÐ»Ñ ÑÐ°Ð±Ð¾ÑÑ: Ð·Ð°Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°ÑÑ Ð¸ ÑÐ°ÑÑÑÐ¸ÑÐ°ÑÑ Ð¼Ð°Ð»Ð¾ÑÑÐ°Ð¶Ð½ÑÐ¹ ÑÐ½ÐµÑÐ³Ð¾ÑÑÑÐµÐºÑÐ¸Ð²Ð½ÑÐ¹ Ð´Ð¾Ð¼. ÐÐ»Ñ Ð´Ð¾ÑÑÐ¸Ð¶ÐµÐ½Ð¸Ñ Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐµÐ»Ð¸ ÑÐµÑÐ°Ð»Ð¸ÑÑ ÑÐ»ÐµÐ´ÑÑÑÐ¸Ðµ Ð·Ð°Ð´Ð°ÑÐ¸: â¢ ÐÑÐ±Ð¾Ñ ÑÑÐ°ÑÑÐºÐ° Ð¿Ð¾Ð´ ÑÑÑÐ¾Ð¸ÑÐµÐ»ÑÑÐ²Ð¾. â¢ Ð¡ÑÐ°Ð²Ð½ÐµÐ½Ð¸Ðµ Ð¸ Ð²ÑÐ±Ð¾Ñ ÑÑÐµÐ½Ð¾Ð²Ð¾Ð³Ð¾ Ð¼Ð°ÐµÑÑÐ¸Ð°Ð»Ð°. â¢ Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ° Ð°ÑÑÐ¸ÑÐµÐºÑÑÑÐ½Ð¾-Ð¿Ð»Ð°Ð½Ð¸ÑÐ¾Ð²Ð¾ÑÐ½ÑÑ ÑÐµÑÐµÐ½Ð¸Ð¹. â¢ Ð Ð°ÑÑÐµÑ ÑÐµÐ¿Ð»Ð¾Ð²Ð¾Ð³Ð¾ Ð±Ð°Ð»Ð°Ð½ÑÐ° Ð·Ð´Ð°Ð½Ð¸Ñ Ð´Ð»Ñ ÑÐµÐ¼Ð¿ÐµÑÐ°ÑÑÑÑ Ð½Ð°Ð¸Ð±Ð¾Ð»ÐµÐµ ÑÐ¾Ð»Ð¾Ð´Ð½Ð¾Ð¹ Ð¿ÑÑÐ¸Ð´Ð½ÐµÐ²ÐºÐ¸. â¢ ÐÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð¸ ÑÐ°ÑÑÐµÑ ÑÐ¸ÑÑÐµÐ¼Ñ Ð²Ð¾Ð·Ð´ÑÑÐ½Ð¾Ð³Ð¾ Ð¾ÑÐ¾Ð¿Ð»ÐµÐ½Ð¸Ñ. â¢ ÐÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð¸ ÑÐ°ÑÑÐµÑ ÑÐ¸ÑÑÐµÐ¼Ñ Ð²ÐµÐ½ÑÐ¸Ð»ÑÑÐ¸Ð¸. â¢ ÐÐ¾Ð´Ð±Ð¾Ñ ÑÐ½ÐµÑÐ³Ð¾ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾Ð³Ð¾ Ð¾Ð±Ð¾ÑÑÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ. â¢ ÐÐ¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ñ ÐºÐ»Ð°ÑÑÐ° ÑÐ½ÐµÑÐ³Ð¾ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸. Ð ÐµÐ·ÑÐ»ÑÑÐ°Ñ ÑÐ°Ð±Ð¾ÑÑ: Ð¿ÑÐ¾ÐµÐºÑ ÑÐ½ÐµÑÐ³Ð¾ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾Ð³Ð¾ Ð¼Ð°Ð»Ð¾ÑÑÐ°Ð¶Ð½Ð¾Ð³Ð¾ Ð´Ð¾Ð¼Ð° Ñ Ð²Ð¾Ð·Ð´ÑÑÐ½ÑÐ¼ Ð¾ÑÐ¾Ð¿Ð»ÐµÐ½Ð¸ÐµÐ¼.
description: Ð urÑÐ¾sÐµ Ð¾f wÐ¾rk: tÐ¾ dÐµsign Ð°nd ÑÐ°lÑulÐ°tÐµ Ð° lÐ¾w-lÐµvÐµl ÐµnÐµrgy ÐµffiÑiÐµnt hÐ¾usÐµ. TÐ¾ Ð°ÑhiÐµvÐµ this gÐ¾Ð°l, thÐµ fÐ¾llÐ¾wing tÐ°sks wÐµrÐµ sÐ¾lvÐµd: â¢ SÐµlÐµÑtiÐ¾n Ð¾f Ð° sitÐµ fÐ¾r ÑÐ¾nstruÑtiÐ¾n. â¢ Ð¡Ð¾mÑÐ°risÐ¾n Ð°nd sÐµlÐµÑtiÐ¾n Ð¾f wÐ°ll mÐ°tÐµriÐ°ls. â¢ DÐµvÐµlÐ¾ÑmÐµnt Ð¾f Ð°ÑÑitÐµÑturÐ°l Ð°nd ÑlÐ°nning sÐ¾lutiÐ¾ns. â¢ Ð¡Ð°lÑulÐ°tiÐ¾n Ð¾f thÐµ hÐµÐ°t bÐ°lÐ°nÑÐµ Ð¾f thÐµ building fÐ¾r thÐµ tÐµmÑÐµrÐ°turÐµ Ð¾f thÐµ mÐ¾st ÑÐ¾ld fivÐµ dÐ°ys. â¢ DÐµsign Ð°nd ÑÐ°lÑulÐ°tiÐ¾n Ð¾f thÐµ Ð°ir hÐµÐ°ting systÐµm. â¢ DÐµsign Ð°nd ÑÐ°lÑulÐ°tiÐ¾n Ð¾f thÐµ vÐµntilÐ°tiÐ¾n systÐµm. â¢ SÐµlÐµÑtiÐ¾n Ð¾f ÐµnÐµrgy ÐµffiÑiÐµnt ÐµquiÑmÐµnt. â¢ DÐµtÐµrminÐ°tiÐ¾n Ð¾f thÐµ ÑlÐ°ss Ð¾f ÐµnÐµrgy ÐµffiÑiÐµnÑy. RÐµsult Ð¾f wÐ¾rk: ÑrÐ¾jÐµÑt Ð¾f Ð°n ÐµnÐµrgy-ÐµffiÑiÐµnt lÐ¾w-lÐµvÐµl hÐ¾usÐµ with Ð°ir hÐµÐ°ting.
On the dimension of graphs of Weierstrass-type functions with rapidly growing frequencies
Creators: name: Baranski, Krzysztof
Publisher: name: arXiv
Year: 2011
Subjects: subject: Metric Geometry (math.MG)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We determine the Hausdorff and box dimension of the fractal graphs for a general class of Weierstrass-type functions of the form $f(x) = \sum_{n=1}^\infty a_n \, g(b_n x + θ_n)$, where $g$ is a periodic Lipschitz real function and $a_{n+1}/a_n \to 0$, $b_{n+1}/b_n \to \infty$ as $n \to \infty$. Moreover, for any $H, B \in [1, 2]$, $H \leq B$ we provide examples of such functions with $\dim_H(\graph f) = \underline{\dim}_B(\graph f) = H$, $\bar{\dim}_B(\graph f) = B$.
description: 18 pages
Breaking maize monoculture by introducing soybeans and oat cover crop in the rotation in Bearn (France)
Creators: name: Toque, C
name: Aliaga, C
name: Bachelet Piris, P
Publisher: name: Zenodo
Year: 2020
Subjects: DiverIMPACTSPA
Rotation
Multiple cropping

description: Problem: For climatic and soil condition reasons, maize monoculture in the Bearn region is the reference system for more than 60 years. However, this system faces technical and regulatory issues. This cropping system can suffer from high weed pressure (such as foxtail, crabgrass, datura, panic, bindweed, etc.) and pest damage (wireworm, corn borer, sesamia, etc.). Moreover, this system must also cope with the evolution of CAP regulations, which require the diversification of crop rotation. Solution: To reduce these pressures and face CAP regulations, 8 innovative diversified cropping systems have been evaluated, during the last 3 years, in Bearn. The innovative system based on a 2-year maize-soybean rotation, with an oat cover crop, which has given the most satisfactory results.
Trophic metacommunities : lessons from studying bromeliad and teaching programming in biostatistics
Creators: name: Guzman Uribe, Laura Melissa
Publisher: name: University of British Columbia
Year: 2019

description: Trophic metacommunity ecology brings together the spatial thinking of metacommunity ecology and the complexity of food web ecology. While theoretical development in this field has been bountiful, empirical development has been slower. Using a diverse methodology, I bring together three different empirical approaches to understand trophic metacommunities as exemplified by bromeliads macro-invertebrates. First, I used Markov network analysis to study the effect of regional environmental gradients on community composition and trophic interactions. I found that a gradient in precipitation underlies the spatial turnover of some species and that the interactions of certain predators differed due to differences in bromeliad water volume. Second, I combined experimental feeding trials and a food web model to study the effect of body size diversity at the local scale on food web dynamics. I found that predator persistence was maximized when the minimum prey size in the community was intermediate, but as prey diversity increased the minimum body size could take a broader range of values due to Jensen’s inequality. Third, I used population genetics to estimate dispersal kernels of a predator and a prey. I then used these empirical estimates of dispersal kernels and feeding rates to parameterize a trophic metacommunity model, to study the effect of differences in dispersal between a predator and a prey on persistence. From the empirical dispersal kernel estimates, I found that the prey dispersed up to 25 km whereas the predator dispersed up to 200 m. From the trophic metacommunity model, I found that differences in dispersal rates were sufficient to generate differences in occupancy of our modelled landscape, without requiring variation in the abiotic niche. None of this work would have been possible without strong programming skills and a good understanding of statistics. In my final chapter, I studied the effect of using cognitive load theory to design R programming assignments for undergraduate biostatistics courses. I found that students that learned R through our assignments rated their programming ability higher and were more likely to put the usage of R as a skill in their CVs than control students.
DDVCS on nucleons and nuclei
Creators: name: Kopeliovich, B. Z.
name: Schmidt, Ivan
name: Siddikov, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper we evaluate the double deeply virtual Compton scattering on nucleons and nuclei in the framework of the color dipole model. Both the effects of quark and the gluon shadowing are taken into account.
description: 11 pages, 4 figures. In version 3 a few references added
ASSESSMENT OF PERFORMANCE OF GEWADA ALLE WOREDA  WATER SUPPLY SCHEME, SEGEN ZONE, ETHIOPIA
Creators: name: EADEN OLLO
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: Gewda, Guma, Golango and Lalicho are located at Alle woreda at Segen  Zone, southern
Nations nationalities Region, Ethiopia. These four Kebeles have a water supply network
using  spring  sources  from  highland  and  the  scheme  was  constructed  in  2003  E.C.
Although  it  was  constructed  recently  it  had  many  problems  in  the  network  and  in
operation  and  maintenance.  This  study  was  to  identify  the  problems  and  propose  a
solution  by  using  EPANET  2.0  software,  survey  and  conducting  questionnaire  to  the
users and the committee members.
From the EPANET  analysis  and site survey Gewada  Kebele had  water scarcity because of the
high  pressure  occurring  at  the  site  which  resulted  in  the  burst  of  the  pipes.  Another  output  of
EPANET was the high pressure at Guma, resulted in repeated interruption of water supply for
downstream  users.  It  means  the  pipes  used  are  of  most  probably  poor  quality  although  the
pressure is high and technical problem during design and construction can be another reason.
The finding of the questionnaire about the water supply are summarized as follows: 18.6% said
the  water  supply  service  delivery  in  the  community  was  inadequate  due  to  poor  construction,
45.7%  responded  insufficient  water  quantity,  38.6%  have  responded  weak  ownership  feeling,
31.4% responded inadequate water committee training, 34.3 % said the system had low operation
and  maintenance,  10%  of  the  responded  weak  water  fee  cost  management.  According  to  the
respondents about the water quality, 8.6% said weak protection of the water sources and 20% of
them said the water had unacceptable taste and 40%  said it the water had colour and 21.4 % said
the water had odor.
From the survey, although all the taps are functional, the per capita consumption of water in the
woreda  was  calculated  11.6  litters  which  is  not  sufficient  and  is  below  the  rural  water  supply
standard  of  Ethiopia  which  showed  that  the  community  is  seriously  suffering  from  shortages
water.
From  the  studies  all  the  water  quantity  and  quality  problems  and  the  proper  function  of  the
network were ascribed due to lack of proper operation and maintenance, weak protection of the
spring and the catchment, weak management, low ownership of the community, low training of
the water committee and failure of some part of the network was due to construction and design
problems.  Therefore,  based  on  this  preliminary  study,  regular  maintenance  and  awareness
creation  and  follow  up  to  the  community  by  the  water  Bureau  of  the  Wereda  can  be  a  better
solution to solve the problem before it is getting worse.
ASSESSMENT OF MICRO TO SMALL HYDROPOWER POTENTIAL  SITES OF NYABARONGO RIVER BASIN OF RWANDA
Creators: name: GATETE BENJAMIN
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: The assessment  of micro to small hydropower is very important for the electrical power generation of a
country  based on the hydrological  data. This  study has been conducted at Nyabarongo  River Basin of
Rwanda along with eights gauged stations with the purpose of assessing the hydropower potential based
on micro to small hydropower potential  sites. The  hydrological data have been collected  and analyzed
and  the missing data were filled by using the  arithmetic  mean, double  mass curve was used to check its
consistency. The arc SWAT with arc GIS were used for the identification of the sites and contour map was
done by showing different heads which will help in calculation of the power output of the identified sites.
The selected turbine was Francis turbine which is compatible with micro and small hydropower with the
efficiency ranging between65-80% and in  this study  the efficiency of 75% was selected to be  used. The
total energy output from monthly flow for all sites was calculated and found to be1459.04 GWh, and  the
total energy output taken from flow duration  curve was 1193.35GWh for all eight stations.  Finally  the
community  was  informed  and  been  told  about  the  use  or  the  advantages  and  the  significances  of  the
hydropower for their future life so that to protect and take care of the components of hydropower with its
surroundings.
Spontaneous symmetry breaking and collapse in bosonic Josephson junctions
Creators: name: Mazzarella, Giovanni
name: Salasnich, Luca
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We investigate an attractive atomic Bose-Einstein condensate (BEC) trapped by a double-well potential in the axial direction and by a harmonic potential in the transverse directions. We obtain numerically, for the first time, a quantum phase diagram which includes all the three relevant phases of the system: Josephson, spontaneous symmetry breaking (SSB), and collapse. We consider also the coherent dynamics of the BEC and calculate the frequency of population-imbalance mode in the Josephson phase and in the SSB phase up to the collapse. We show that these phases can be observed by using ultracold vapors of 7Li atoms in a magneto-optical trap.
description: 5 pages, 4 figures, to be published in Phys. Rev. A
DEVELOPMENT OF HYDRAULIC WATER PUMPING DEVICE DEVELOPMENT OF HYDRAULIC WATER PUMPING DEVICE
Creators: name: MANAYE GETU TSIGE
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: This thesis presents new development of hydraulic water pumping device, with necessary
design equations and steps to design mechanical and hydraulic features of the device. The
main working parts of the device are waterwheels, shaft and belt, along that the working
principle of the device involves rotary motion of shaft and waterwheels, and alternative
rotating and reciprocating motion of the belt. The major areas of studies to carry out this
particular  research  work  are  waterpower, waterwheels,  cavitation,  continuity  equation,
law of conservation of energy, theories of shaft design,  torque,  moment of force, shear
and bending moment, angular and linear velocity and some Statistical and Mathematical
manipulations. Prominently, technical analysis of the design parameters are carried out to
fix dimensions of the device parts and to determine nominal water flow capacity required
for the input power. Theoretical performance of the device is evaluated at slow motion of
the parts of the device to accommodate laboratory and field test by minimizing problems
associated with at high velocity.  A typical performance of the device at head of 0.5m, at
flow capacity of 0.0005­0.0015m
3
/s and at angular motion of 52­60 rev/min is one liter
volume  of  water  from  3­15m  depth  of  lifting  at  5­35  sec  time  interval.  The main
advantages of the device are that it uses non useful or waste water as its power source to
lift  useful  water and  the working principle  of  device  helps  to  avoid  occasional  and
technical  loses of useful water. The  limitations  of  this  study  are  that  it  not covers the
actual and theoretical performance of the device at fast motion of device parts, and it only
focuses on important mechanical and hydraulic design features of the device. The future
implication of this thesis is to develop water powered technology for our daily uses.
Spinon Phonon Interaction and Ultrasonic Attenuation in Quantum Spin Liquids
Creators: name: Zhou, Yi
name: Lee, Patrick A
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Several experimental candidates for quantum spin liquids have been discovered in the past few years which appear to support gapless fermionic $S = {1\over 2}$ excitations called spinons. The spinons may form a Fermi sea coupled to a $U(1)$ gauge field, and may undergo a pairing instability. We show that despite being charge neutral, the spinons couple to phonons in exactly the same way that electrons do in the long wavelength limit. Therefore we can use sound attenuation to measure the spinon mass and lifetime. Furthermore, transverse ultrasonic attenuation is a direct probe of the onset of pairing because the Meissner effect of the gauge field causes a "rapid fall" of the attenuation at $T_c$ in addition to the reduction due to the opening of the energy gap. This phenomenon, well known in clean superconductors, may reveal the existence of the U(1) gauge field.
description: 4+epsilon pages of main text + 12 pages of supplementary material
Diversifying rotations by introducing spring crop to reduce weed pressure in Berry (France)
Creators: name: Toque, C
name: Sauzet, G
name: Baranger, E
name: Bachelet Piris, P
Publisher: name: Zenodo
Year: 2020
Subjects: DiverIMPACTSPA
Rotation
Cropping system
Weed management

description: Problem: For economic reasons, rotations in the Berry region are short and focused on winter crops (rapeseed-wheat-barley). Such rotations are prone to high weed pressure (such as bedstraw, hedge mustard, geraniums, etc., including resistant weeds), and lead to a high dependence on herbicides (average TFI of 2.9). Ten-year projections (carried out by Arvalis, Terres Inovia and ITB using the Systerre® tool) have shown that weed pressure may increase further in these rotations, leading to a 37% increase in herbicide use, an 8% loss in crop productivity and a 60% decrease in profit. Solution:  To limit and reduce weed pressure and herbicide dependency, diversified cropping systems are being investigated. Diversifying rotation to rapeseed-maize-sunflower-soft winter wheat, i.e., by adding spring crop species for two consecutive years, may help reduce pest and disease burden. Other spring crops than maize and sunflower, e.g., lentils, can be added in the rotation to add value whilst breaking weed cycles.
Green infrastructure in the City of Vancouver : performance monitoring of stormwater tree trenches and bioswales
Creators: name: Vega, Osvaldo Miguel
Publisher: name: University of British Columbia
Year: 2019

description: Green infrastructure (GI) is an approach that aims to reduce the amount of stormwater that reaches the combined or stormwater sewer networks and protect receiving waterbodies in urban watersheds. Cities across North America and the world are devoting resources to implement different types of GI to showcase their use. As it is a new approach, the field of GI research is emerging. The main objective of this thesis is to contribute to the GI literature by assessing the water quantity and water quality performances of three green infrastructure practices constructed in 2018 by the City of Vancouver. A stormwater tree trench and two bioswales were monitored. The soil moisture levels in the structural soil stormwater tree trench and one of the bioswales were monitored to assess the drought resistance of these practices and to evaluate the salt migration. This research introduced low cost monitoring options that can simplify the monitoring of stormwater tree trenches and bioswale practices. This research concluded that structural soil stormwater tree trenches and bioswale practices are effective in treating heavy metals, suspended solids, and other pollutants harmful street pollutants. These practices are also effective tools in removing stormwater from the stormwater/sewer networks by promoting infiltration to native soils.
ASSESSMENT OF GROUNDWATER CONTAMMINATION BY  AGRICULTURAL CHEMICALS AND URBAN EFFLUENTS IN  ARBAMINCH AREA, SNNPR, ETHIOPIA
Creators: name: TEMESGEN ALEMU
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: Groundwater is a major source for all purpose of water requirements and it plays a vital role
to  human  life  and  economic  activities.  But  unplanned  and  non-scientific  action  on
groundwater has led to sharp depletion in quantity and degradation in quality of the resource
Therefore,  the  prime  focus  of  this  study wasto  holisticallt  understand  groundwater
contamination by agricultural fertilizers and sewage effluents by evaluating the groundwater
contaminant  parameters  and  their  spatial  distribution  using  geostatistical  methods at  Arba
Minch  University  farm.  To  achieve  this  objective  a  total  of  nine  observation  wells  were
established  by  hand  auger  manually  in  study  area  for  sampling  of  groundwater.  These
groundwater  wells  samples  were analyzed  in  the  field  for  physico-chemical  parameters
(Temperature, pH and EC) and depth to water levels was measured, and in the laboratory for
parameters such as  BOD, Nitrite, Nitrate and Phosphate. The physico-chemical parameters
result were compared to the standard guideline values as recommended by the World Health
Organizations  (WHO)  for  drinking  and  public  health  in  order  to  have  an  overview  of  the
present groundwater quality. The results of the Laboratory analysis were examined by the use
of  the  software  package  ArcGIS  and  AquaChem.  Using  GIS  interpolation  technique  with
ArcGIS  9.3,  spatial  distribution  maps  of  BOD,  Nitrate,  Nitrite  and  Phosphate  have  been
created.  Using  AquaChem  software  package,  interpretation  and  graphical  representation
methods such as Detection Summary, Map plot and scatter plot of agricultural chemicals and
sewage effluents were established. Groundwater level contour map was produced by ArcGIS
for  the  identification  of  groundwater  flow  direction to  understand  pollutant  flow  direction.
According  to  the  overall  assessment  of  the  study  area,  all  parameters  analyzed  for
agricultural  fertilizers  (Nitrate  and  Phosphate)  are  below  the  maximum  desirable  limits  of
WHO and from the parameters analyzed for AMU sewage effluents contamination BOD is
below  the  maximum  desirable  limit  of  WHO  but  Nitrite of 66% samples  was  found  to  be
above the maximum desirable limit of WHO. Groundwater flow direction was identified to
be in East-East North direction