cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The effect of activity-related meridional flow modulation on the strength of the solar polar magnetic field
Creators: name: Jiang, J.
name: Isik, E.
name: Cameron, R. H.
name: Schmitt, D.
name: Schuessler, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We studied the effect of the perturbation of the meridional flow in the activity belts detected by local helioseismology on the development and strength of the surface magnetic field at the polar caps. We carried out simulations of synthetic solar cycles with a flux transport model, which follows the cyclic evolution of the surface field determined by flux emergence and advective transport by near-surface flows. In each hemisphere, an axisymmetric band of latitudinal flows converging towards the central latitude of the activity belt was superposed onto the background poleward meridional flow. The overall effect of the flow perturbation is to reduce the latitude separation of the magnetic polarities of a bipolar magnetic region and thus diminish its contribution to the polar field. As a result, the polar field maximum reached around cycle activity minimum is weakened by the presence of the meridional flow perturbation. For a flow perturbation consistent with helioseismic observations, the polar field is reduced by about 18% compared to the case without inflows. If the amplitude of the flow perturbation depends on the cycle strength, its effect on the polar field provides a nonlinearity that could contribute to limiting the amplitude of a Babcock-Leighton type dynamo.
description: 16 pages, 5 figures, accepted by ApJ
Nonreciprocal Bloch Oscillations in Magneto-Optic Waveguide Arrays
Creators: name: Levy, Miguel
name: Kumar, Pradeep
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We show that nonreciprocal optical Bloch-like oscillations can emerge in transversely magnetized waveguide arrays in the presence of an effective index step between the waveguides. Normal modes of the system are shown to acquire different wavenumbers in opposite propagation directions. Significant differences in phase coherence and decoherence between these normal modes are presented and discussed. Non-reciprocity is established by imposing unequal vertical refractive index gradients at the substrate/core, and core/cover interfaces in the presence of transverse magnetization.
description: 12 pages, 2 figures
HYDRAULIC PERFORMANCE OF URBAN WATER SUPPLY DISTRIBUTION  SYSTEM: A CASE STUDY AT INJIBARA TOWN WATER SUPPLY PROJECT
Creators: name: ASRAT KASSIE DESTA
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: The  occurrence  of  transient  flow  in  water  distribution  system  creates  large  pressure  forces
and rapid fluid  accelerations  or  deceleration  that  can cause failure of hydraulic equipment  in
a pipe network  if  adequate transient  control measures are not in  place.  This research dealt
with the study of hydraulic performance of Injibara water supply distribution system  project
as a case study. Injibara town is the capital of Banja Woreda and Awi Administrative Zone of
the Amhara National Regional State. Injibara has three kebeles including rural & town kebele
that have total  area of 36.19 sq.  km, and out of which the  Injibara town covers  an area of
20.379 sq.  km.  The  water supply distribution system of Injibara town was designed  in  2009
by  Matt  MacDonald  consultant,  and  revised  in  2013  by  Amhara  Design  and  Supervision
Works Enterprise. The methods used to carry out this research were desk study  to evaluate
previous designs, field data collection and data analysis.  AFT Impulse  model was used for
water hammer analysis, and Water CAD model was used for network simulation. The results
of the AFT Impulse model revealed that there  were pressure and velocity change at out let of
pump and inlets of pipe nodes.  These changes indicated that the pressure line of three pumps
had  water  hammer  occurrence  during  pump  trip.  Hydraulic  parameters  obtained  from  the
results  of  analysis  using  Water  CAD  model  were  pressure,  flow  rate  and  velocity  of  the
distribution system network. There were low pressure values which was less than 5 m water
column during pick hour demand. The low pressure zone villages around hospital & college
areas  did  not  get  water  at  these  junctions  during  pick  hour  demand.  Finally,  this  research
recommends preventive measures of water hammer by providing surge control devices and
for the low pressure increase diameter of pipe as the first option.
Tidal Disruption Flares of Stars From Moderately Recoiled Black Holes
Creators: name: Stone, Nicholas
name: Loeb, Abraham
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We analyze stellar tidal disruption events as a possible observational signature of gravitational wave induced recoil of supermassive black holes. As a black hole wanders through its galaxy, it will tidally disrupt bound and unbound stars at rates potentially observable by upcoming optical transient surveys. To quantify these rates, we explore a broad range of host galaxy and black hole kick parameters. We find that emission from a transient accretion disk can produce ~1 event per year which LSST would identify as spatially offset, while super-Eddington tidal flares, if they exist, are likely to produce ~10 spatially offset events per year. A majority of tidal disruption flares, and a large majority of flares with an observable spatial offset, are due to bound rather than unbound stars. The total number of disruption events due to recoiled black holes could be almost 1% of the total stellar tidal disruption rate.
description: 15 pages, 8 figures
A comparative study of model ingredients: fragmentation in heavy-ion collisions using quantum molecular dynamics model
Creators: name: Kumar, Sanjeev
name: Kumar, Suneel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We aim to understand the role of NN cross-sections, equation of state as well as different model ingredients such as width of Gaussian, clusterisation range and different clusterisation algorithms in multifragmentation using quantum molecular dynamics model. We notice that all model ingredients have sizable effect on the fragment pattern.
description: 12 Pages, 4 Figures
Harkness and action research : activity and affect
Creators: name: DiPietro, Michael
Publisher: name: University of British Columbia
Year: 2019

description: This study will explore how action research could be used as a tool to improve a discussion-based teaching philosophy (Harkness) at an independent school as well as improve student skills in both Harkness and research. Action research was chosen as the methodology to implement change at the school, while a thematic analysis will be used to then explore the ways in which action research affected the participants in the group. It was found that through participation in an action research project, participants developed an increased sensitivity to Harkness, research skills, and were able to explore the learning environment they were engaged in through democratic discussions with one teacher-researcher. This research will then open avenues to explore further in subsequent action research projects which could focus on the culture, competition, and other community aspects in co-operation with the students at the school.
On-shell superamplitudes in N<4 SYM
Creators: name: Elvang, Henriette
name: Huang, Yu-tin
name: Peng, Cheng
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present an on-shell formalism for superamplitudes of pure N<4 super Yang-Mills theory. Two superfields, Phi and Phi^+, are required to describe the two CPT conjugate supermultiplets. Simple truncation prescriptions allow us to derive explicit tree-level MHV and NMHV superamplitudes with N-fold SUSY. Any N=0,1,2 tree superamplitudes have large-z falloffs under super-BCFW shifts, except under [Phi,Phi^+>-shifts. We show that this `bad' shift is responsible for the bubble contributions to 1-loop amplitudes in N=0,1,2 SYM. We evaluate the MHV bubble coefficients in a manifestly supersymmetric form and demonstrate for the case of four external particles that the sum of bubble coefficients is equal to minus the tree superamplitude times the 1-loop beta-function coefficient. The connection to the beta-function is expected since only bubble integrals capture UV divergences; we discuss briefly how the minus sign arises from UV and IR divergences in dimensional regularization. Other applications of the on-shell formalism include a solution to the N^{K}MHV N=1 SUSY Ward identities and a clear description of the connection between 6d superamplitudes and the 4d ones for both N=4 and N=2 SYM. We outline extensions to N<8 supergravity.
description: 37 pages, 4 figures
Radial oscillations of color superconducting self-bound quark stars
Creators: name: Flores, C. Vasquez
name: Lugones, G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the effect of the color-flavor locking pairing pattern on the adiabatic radial oscillations of pure self-bound quark stars using an equation of state in the framework of the MIT Bag model. We integrate the equations of relativistic radial oscillations to determine the fundamental and the first excited oscillation modes for several parameterizations of the equation of state. For low mass stars we find that the period of the fundamental mode is typically $\sim 0.1$ ms and has a small dependence on the parameters of the equation of state. For large mass stars the effect of color-flavor locking is related to the rise of the maximum mass with increasing $Δ$. As for unpaired quark stars, the period of the fundamental mode becomes divergent at the maximum mass but now the divergence is shifted to large masses for large values of the pairing gap $Δ$. As a consequence, the oscillation period is strongly affected by color superconductivity for stars with $M \gtrsim 1.5 \; \textrm{M}_{\odot}$. We fit the period of the fundamental mode with appropriate analytical functions of the gravitational redshift of the star and the pairing gap $Δ$. We further discuss the excitation and damping of the modes and their potential detectability during violent transient phenomena.
description: to appear in Physical Review D
SWAT BASED RUNOFF - SEDIMENT YIELD MODELING AND  DEVELOPMENT OF MANAGEMENT OPTIONS:  (A CASE STUDY OF GIBE III WATERSHED, UPPER OMO-GIBE, ETHIOPIA)
Creators: name: BEDILU BETELA
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: Surface runoff and sediment loading are immense problems that have threatened water resources
development in the Omo river basin.  Deposition of sediment in reservoirs reduces the storage
capacity  of  the  reservoir  and  they  can  cause  serious  problems  concerning  the  operation  and
stability of the dam. The objective of the study is to model runoff-sediment yield for upper Omo
Gibe III Catchment, characterizes the runoff  from catchment and associated sediment yield, to
evaluate spatial distribution of sediment source areas, and identify hot spot areas, to assess the
impact  of  different  catchment  management  interventions  on  runoff  and  sediment  yield  and
finally  develop  appropriate  management  options  to  control  soil  erosion  and  sedimentation
problems  in  Omo-Gibe  III  watershed  by  using  SWAT  model.   Thus,  an  insight  into  surface
runoff  /sedimentation  mechanisms  and  mitigation  methods  plays  an  imperative  role  for  the
sustainable  water  resources  development  in  the  region.  This  paper  presents  daily  flow  and
sediment yield simulations in the upper Omo-Gibe III under different Best Management Practice
(BMP)  scenarios.  Scenarios  applied  in  this  paper  are  (i)maintaining  existing  /  baseline
conditions,  (ii)  introducing  different  width  of  filter  strips,  (iii)  applying  stone  bunds  (parallel
terraces) with different slope length, and (iv) reforestation. The Soil and Water Assessment Tool
(SWAT)  was  employed  for  modeling  runoff  and  sediment  yield  in  Upper  Omo-Gibe  III
watershed  and  used  to  identify  soil  erosion  prone  areas  and  assess  the  impact  of  BMPs  on
sediment reduction. The model was calibrated and validated against measured flow and sediment
data.  Both  calibration  and  validation  results  showed  good  match  between  measured  and
simulated flow and suspended sediment. For the existing conditions scenario, the model results
showed a satisfactory agreement between daily observed and simulated sediment concentrations
as indicated by Nash-Sutcliffe efficiency greater than 0.84. The simulation results showed that
applying filter strips, parallel terrace/stone bunds and reforestation scenarios reduced the current
sediment yields both at the sub basins and the basin outlets. However, a precise interpretation of
the  quantitative  results  may  not  be  appropriate  because  some  physical  processes  are  not  well
represented in the SWAT model.
Recent Results from BaBar, Belle, BESIII and CDF
Creators: name: Olsen, Stephen Lars
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A brief report of some recent experimental developments concerning the $X$, $Y$ and $Z$ charmoniumlike mesons states and other puzzling states from the BaBar, Belle, BESIII and CDF experiments is presented.
description: 7 pages, 13 figures, write-up of a plenary talk on XYZ mesons etc at Quark Confinement & Hadron Spectrum IX, Aug 30 - Sept 3, 2010, Madrid
Band structures of Cu2nSnS4 and Cu2nSnSe4 from many-body methods
Creators: name: Botti, Silvana
name: Kammerlander, David
name: Marque, Miguel A. L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We calculate the band structures of kesterite and stannite Cu2ZnSnS4 and Cu2ZnSnSe4, using a state-of-the-art self-consistent GW approach. Our accurate quasiparticle states allow to discuss: the dependence of the gap on the anion displacement; the key-role of the non-locality of the exchange-correlation potential to obtain good structural parameters; the reliability of less expensive hybrid functional and GGA+U approaches. In particular, we show that even if the band gap is correctly reproduced by hybrid functionals, the band-edge corrections are in disagreement with self-consistent GW results, which has decisive implications for the positioning of the defect levels in the band gap.
description: accepted for publication in App. Phys. Lett. (2011)
HYDROLOGICAL MODELING FORECASTING IN NIGER HYDROLOGICAL MODELING FOR FLOOD  FORECASTING IN NIGER RIVER BASIN:  SUB BASIN, NIGERIA FOR FLOOD  RIVER BASIN: BENUE
Creators: name: FEKADU TESHOME TEFERA
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: Flood forecasting can help to reduce the socio-economical and ecological effect of flood hazard
in  Benue Sub Basin,  in  Nigeria. The  objective  of  this  study  is  to  set-up parsimonious flood
forecasting model as  an  input to flood warning in  central  part  of  Nigeria.  In  this study, high
resolution (TRMM-3B42) satellite rainfall product was used for model calibration and real time
(TRMM-3B42RT)  and  forecasted  (ECMWF)  rainfall  products  were  evaluated  for  flood
forecasting.  The implications  of  the TRMM-3B42  and  TRMM-3B42RT  bias were  evaluated.
The HEC-HMS rainfall-runoff hydrological model was selected for this study. Performance of
the  rainfall-runoff  model  was  assessed  using  Nash- Sutcliffe  Efficiency  (NSE),  Coefficient  of
determination (R
2
) and Relative Volume Error (RVE) and percentage error of peak flow (PEPF)
performance  indices. Real  time  flow  forecast  assessment  is  conducted  with  respect  to  three
different flood warning threshold levels (Medium, severe and very severe) for 1 to 6 days lead
time. The forecast skill wasassessed using categorical verification statistical such as Probability
Of Detection (POD), Frequency Of Hit (FOH) and Frequency Of Miss (FOM).It is found that the
model  performance  was satisfactory  in  terms  of  reproducing  the  observed  hydrograph  for  the
Benue basin at Makurdi station though the performance slightly deteriorated for the calibration
period. For the study area, the bias of both the operational and real time satellite rainfall product
should  be corrected  to  improve forecast skill. When  evaluating the graphical  forecast skill the
bias  corrected  TRMM-3B42RT  flood  forecast  was  more  accurate  than  the  ECMWF  flood
forecast. Satellite based rainfall product are important for data scarcity area and crucial input for
real time flood forecasting model. However, the model performance may be improved further by
considering additional rain gauges for the bias correction of satellite products.
Holographic dark energy and validity of the generalized second law of thermodynamics in the dgp brane world
Creators: name: Dutta, Jibitesh
name: Chakraborty, Subenoy
name: Ansari, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, we investigate the validity of the generalized second law of thermodynamics of the universe in the DGP brane world.The boundary of the universe is assumed to be enclosed by the dynamical apparent horizon or the event horizon. The universe is chosen to be homogeneous and isotropic and the validity of the first law has been assumed here. The matter in the universe is taken in the form of non-interacting two fluid system- one component is the holographic dark energy model and the other component is in the form of dust.
description: 9 pages, 4 figures
Variable turbulent convection as the cause of the Blazhko effect - testing the Stothers model
Creators: name: Smolec, R.
name: Moskalik, P.
name: Kolenberg, K.
name: Bryson, S.
name: Cote, M. T.
name: Morris, R. L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The amplitude and phase modulation observed in a significant fraction of the RR Lyrae variables - the Blazhko effect - represents a long-standing enigma in stellar pulsation theory. No satisfactory explanation for the Blazhko effect has been proposed so far. In this paper we focus on the Stothers (2006) idea, in which modulation is caused by changes in the structure of the outer convective zone, caused by a quasi-periodically changing magnetic field. However, up to this date no quantitative estimates were made to investigate whether such a mechanism can be operational and whether it is capable of reproducing the light variation we observe in Blazhko variables. We address the latter problem. We use a simplified model, in which the variation of turbulent convection is introduced into the non-linear hydrodynamic models in an ad hoc way, neglecting interaction with the magnetic field. We study the light curve variation through the modulation cycle and properties of the resulting frequency spectra. Our results are compared with Kepler observations of RR Lyr. We find that reproducing the light curve variation, as is observed in RR Lyr, requires a huge modulation of the mixing length, of the order of +/-50 per cent, on a relatively short time-scale of less than 40 days. Even then, we are not able to reproduce neither all the observed relations between modulation components present in the frequency spectrum, nor the relations between Fourier parameters describing the shape of the instantaneous light curves.
description: 17 pages, 13 figures, accepted for publication in MNRAS; for associated animation, see http://homepage.univie.ac.at/radek.smolec/publications/KASC11a/
FLOOD MODELLING AND DAMAGE REDUCTION ANALYSIS: (A CASE STUDY  ON RIBB CATCHMENT, UPPER BLUE NILE BASIN, ETHIOPIA)
Creators: name: Ashagrie, Matias
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: Fogera flood plain, located at the foot of Ribb catchment, has been repeatedly devastated
by powerful flash floods. As  the flood pass through center of the flood plain, it causes
tremendous losses in terms of life and property. Even though various mitigation measures
were undertaken so far, they are not adequate to withstand the flood threats. Hence, this
study carried  out flood damage reduction  analysis in  order  to  evaluate and  identify  the
competent  flood mitigation  plans.  The  required  components  for  this  analysis,  flow
frequency functions for each alternative flood control plans were generated by modifying
watershed characteristics and geometry using HEC-HMS model. The output from HMS
was then used to run the HEC-RAS model and generate water surface elevations. These
functions  were  then  used  with  HEC-FDA  to  compute  expected  annual  damage  and
evaluate performance of the alternative flood damage reduction plans. Based on the result
of flow-frequency analysis, implementations  of  detention  pond  and  diversion  control
create  significant  impact  on  probability-discharge  functions  for  the  study  area.  The
potential  vulnerable  areas  for  the 100 year  return  period  flood  event  are Ambua  Kokit
kebele. Under the stated assumptions, the project that is most desirable from an economic
viewpoint is diversion control flowed by detention pond. However, before making a final
decision the social and political aspects also should be considered. EAD is reduced from
9.676 million$ to 3.626 million$ due  to  application  of  the  proposed  diversion  control.
Whereas,  the  Ribb  dam  restricts  the  downstream  flow  not  to  go  beyond  the  target
flow,76.5  m3/s  for  this  study. So in  this study  the dam  reduces the  expected  annual
damage by 5.285 million$ (54.6%).
FLOOD  DAMAGE  REDUCTION  ANALYSIS:  (CASE  STUDY  ON  RIBB  CATCHMENT, FOGERA FLOOD PLAIN)
Creators: name: Ashagrie, Matias
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: Fogera flood plain, located at the foot of Ribb catchment, has been repeatedly devastated
by powerful flash floods. As  the flood pass through center of the flood plain, it causes
tremendous losses in terms of life and property. Even though various mitigation measures
were undertaken so far, they are not adequate to withstand the flood threats. Hence, this
study carried  out flood damage reduction  analysis  in order  to  evaluate and identify  the
competent  flood mitigation  plans.  The  required  components  for  this  analysis,  flow
frequency functions for each alternative flood control plans were generated by modifying
watershed characteristics and geometry using HEC-HMS model. The output from HMS
was then used to run the HEC-RAS model and generate water surface elevations. These
functions  were  then  used  with  HEC-FDA  to  compute  expected  annual  damage  and
evaluate performance of the alternative flood damage reduction plans. Based on the result
of flow-frequency analysis, implementations  of  detention  pond  and  diversion  control
create  significant  impact  on  probability-discharge  functions  for  the  study  area.  The
potential  vulnerable  areas  for  the 100 year  return  period  flood  event  are Ambua  Kokit
kebele. Under the stated assumptions, the project that is most desirable from an economic
viewpoint is diversion control flowed by detention pond. However, before making a final
decision the social and political aspects also should be considered.
Type Ia Supernovae: Non-standard Candles of the Universe
Creators: name: Bogomazov, A. I.
name: Tutukov, A. V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We analyze the influence of the evolution of light absorption by gray dust in the host galaxies of type Ia supernovae (SNe Ia) and the evolution of the mean combined mass of close-binary carbon-oxygen white dwarfs merging due to gravitational waves (SNe Ia precursors) on the interpretation of Hubble diagrams for SNe Ia. A significant increase in the mean SNe Ia energy due to the higher combined masses of merging dwarfs should be observable at redshifts z > 2. The observed relation between the distance moduli and redshifts of SNe Ia can be interpreted not only as evidence for accelerated expansion of the Universe, but also as indicating time variations of the gray-dust absorption of light from these supernovae in various types of host galaxies, observational selection effects, and the decrease in mean combined masses of merging degenerate dwarfs.
description: 14 pages, 2 figures
PERFORMANCE ASSESSMENT OF RAIN WATER HARVESTING BIRKAS: - THE CASE OF KEBRIBEYAH WOREDA OF SOMALI REGION, ETHIOPIA.
Creators: name: MULUGETA SHUME SHEBIE
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: Water pollution and water stress is tremendous problem in the pastoral area of Somali region
including Kebribeyah  Woreda. This study was made to assess the performance of  traditional
rain  water  harvesting  Birkas  as  a  source  of  domestic  and  livestock  water  supply  at
Kebribeyah Woreda. For this study a total of 150 household questionnaires conducted and 15
water  samples  from  15  Birkas for water quality test were  analyzed from  selected  Lebeshek,
Gerbe and Meregacho Kebeles.  The design and physical capacity  of the Birkas were  studied
with  site  visits  and  documents.  Temperature,  electric  conductivity,  pH,  turbidity,  total
hardness,  total  dissolved  solid,  alkalinity,  nitrate  and  total  coliform  was  analyzed  to
characterize the water.
80%  of  the  Lebeshek,  80%  of  the  Gerbe  and  100%  of  the  Meregacho  of  the  measured
samples  pH  values  satisfies  WHO  standards.  40%,  20%  and  20%  of  the  sample  turbidity
from  Lebeshek,  Gerbe  and  Meregacho  respectively  satisfied  the  WHO  standards  however,
none  of  the  samples  were  qualified  the  WHO  standard  for  total  coliform.  The  rest  of  the
parameters are  within  the permissible limit of WHO  standards for drinking water  standard.
The  conducted  survey  indicated  the  highest  proportion  of  water  supply  consumed  by  the
livestock.    Little  sense  of  ownership  and  responsibility  among  the  community  towards  the
Birka,  luck  of  frequent  maintenance  and  water  treatment  were  the  major  problem.  With
regard to the quantity of water and quality loss, water loss due to evaporation, sedimentation,
crack (seepage)  and poor management condition was aggravating the problem of the water
shortage in the area.
These  preliminary  results  can  be  useful  for  relevant  stakeholders  to  take  the  necessary
measures  when designing, rehabilitating, managing Birkas  in the area. The involvement of
community is of paramount importance for sustainability.
Access to oral health care for people living with human immunodeficiency virus attending a community-based preventive program in British Columbia
Creators: name: Feng, Iris
Publisher: name: University of British Columbia
Year: 2019

description: Objective: It is important that people living with HIV/AIDS (PLWHA) receive routine oral health care due to their increased risk of oral complications. However, PLWHA have difficulty accessing oral health services for various reasons, including having to endure HIV-related stigma and discrimination. In 2011, the University of British Columbia (UBC) Dental Hygiene Degree Program (DHDP) implemented a preventive oral health program at the Positive Living Society of British Columbia (PSLBC), a non-profit organization supporting PLWHA. This study aims to assess the influence this type of service delivery has on access to oral health care for members of PLSBC. Methods: A retrospective chart review of 170 PLSBC members who utilized the program services was conducted with descriptive analysis. Sixty-nine patient satisfaction surveys were also reviewed. Personal interviews with 10 members and one focus group comprised of 12 staff and administrative personnel were conducted. Audio-recordings were transcribed verbatim and coded thematically using N-Vivo® 11 software. Emerging themes were identified using the interpretative phenomenology approach following Penchansky and Thomas’ theory of access. Results: Of the 170 members who utilized the program, the majority (85.9%) were males and most (72.8%) lived where the program was easily accessible and convenient. Eighty-six members were routinely and currently using the services. The program helped members utilize their financial resources to receive other types of dental services. As members are influenced by their past traumatic experiences, they appreciated services were delivered in a safe manner and in a stigma-free setting. Members valued the opportunity to educate future dental professionals to reduce HIV-related stigma. However, unmet dental needs could not be addressed in the program for some members and appear to be influenced by dimensions of access at referral clinics. Conclusion: This community-based preventive dental program had multiple positive influences on access to oral health care for members of PLSBC; however, the referral pathway appeared to need improvement. Findings highlight that there is a need for dental professionals to address the interrelated dimensions of access in order to engage PLWHA in oral health care due to the influence of socioeconomic status, HIV-related stigma, and histories of trauma.
Modelling stellar coronal magnetic fields
Creators: name: Jardine, Moira
name: Donati, Jean-Francois
name: Arzoumanian, Doris
name: de Vidotto, Aline
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Our understanding of the structure and dynamics of stellar coronae has changed dramatically with the availability of surface maps of both star spots and also magnetic field vectors. Magnetic field extrapolations from these surface maps reveal surprising coronal structures for stars whose masses and hence internal structures and dynamo modes may be very different from that of the Sun. Crucial factors are the fraction of open magnetic flux (which determines the spin-down rate for the star as it ages) and the location and plasma density of closed-field regions, which determine the X-ray and radio emission properties. There has been recent progress in modelling stellar coronae, in particular the relative contributions of the field detected in the bright surface regions and the field that may be hidden in the dark star spots. For the Sun, the relationship between the field in the spots and the large scale field is well studied over the solar cycle. It appears, however, that other stars can show a very different relationship.
description: 6pages, 4 figures
HYDROLOGICAL MODELING FOR FLOOD  FORECASTING IN NIGER RIVER BASIN: BENUE  SUB BASIN, NIGERIA
Creators: name: FEKADU TESHOME TEFERA
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: Flood  forecasting  can  help  to  reduce  the  socio-economical  and  ecological  effect  of  flood
hazard in Benue  Sub  Basin, in Nigeria.  The objective of this study is to set-up  parsimonious
flood forecasting model  as an input to flood warning in central part of Nigeria.  In this study,
high resolution (TRMM-3B42) satellite rainfall product  was  used for model  calibration  and
real time (TRMM-3B42RT) and forecasted (ECMWF) rainfall products  were evaluated for
flood  forecasting.  The  implications  of  the  TRMM-3B42  and  TRMM-3B42RT  bias  were
evaluated.  The  HEC-HMS  rainfall-runoff  hydrological  model  was  selected  for  this  study.
Performance  of  the  rainfall-runoff  model  was  assessed  using  Nash-  Sutcliffe  Efficiency
(NSE), Coefficient of determination (R
2
) and  Relative  Volume Error (RVE) and percentage
error  of  peak  flow  (PEPF)  performance  indices.  Real  time  flow  forecast  assessment  is
conducted with respect to three different flood warning threshold levels (Medium, severe and
very  severe)  for  1  to  6  days  lead  time.  The  forecast  skill  was  assessed  using  categorical
verification statistical  such as  Probability Of  Detection (POD), Frequency Of Hit (FOH) and
Frequency Of Miss (FOM).  It is found that the model performance was  satisfactory in terms
of reproducing the observed hydrograph for the Benue basin at Makurdi station though the
performance slightly deteriorated for the calibration period.  For the study  area, the bias of
both the operational and real time satellite rainfall product  should be corrected to improve
forecast  skill.  When  evaluating  the  graphical  forecast  skill  the  bias  corrected  TRMM-
3B42RT flood  forecast was more accurate than the ECMWF flood forecast. Satellite  based
rainfall  product  are  important  for  data  scarcity  area  and  crucial  input  for  real  time  flood
forecasting  model.  However,  the  model  performance  may  be  improved  further  by
considering additional rain gauges for the bias correction of satellite products.
Cystic echinococcosis: current knowledge and suggestions for prevention and control
Creators: name: National Committee For Food Safety
Publisher: name: Zenodo
Year: 2021
Subjects: subject: Italy
subject: Opinion
subject: echinococcosis
subject: Echinococcus granulosus
subject: zoonoses
subject: parasites
subject: http://id.agrisemantics.org/gacs/C7208
subject: http://id.agrisemantics.org/gacs/C10808
subject: http://id.agrisemantics.org/gacs/C2753
subject: http://id.agrisemantics.org/gacs/C86

description: Italian National Committee for Food Safety (CNSA) opinion of 22 September 2021 on Cystic echinococcosis: current knowledge and suggestions for prevention and control Cystic echinococcosis (CE), caused by Echinococcus granulosus, is a chronic and debilitating zoonotic larval cestode infection in humans, which requires the one-health approach as it involves humans and livestock or wildlife health and food and environmental contamination. CE is widespread in many regions of the world and endemic in several Italian Regions. Despite the carrying out of important international research programs, many scientific uncertainties and various issues about CE do not allow us to outline a precise epidemiological framework both in humans and in animals. Although it is difficult to calculate accurately the health and economic burden of CE, the disease is estimated to be responsible for significant economic losses in the public health sector. Globally, a 2006 study estimated an annual loss of 760 million and 140 million dollars attributable to infection in humans and livestock, respectively. As regards Italy, EC is the second cause of hospitalization for zoonosis and human infection is estimated to be responsible for a cost of around 4,000,000 euros per year. To this cost must be added the economic losses due to the reduction in milk production in livestock. The Food Safety Section of the CNSA highlights the need to raise awareness and inform citizens and health professionals about CE in order to reduce the spread of the disease. Furthermore, the Section hopes to carry out studies aimed at characterizing the sources of infection and the socio-cultural habits involved in the transmission of the disease in endemic areas.
description: IT; it; pdf; o.pinto@sanita.it
W^+W^+ plus dijet production in the POWHEGBOX
Creators: name: Melia, Tom
name: Nason, Paolo
name: Rontsch, Raoul
name: Zanderighi, Giulia
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present an implementation of the calculation of the production of W^+W^+ plus two jets at hadron colliders, at next-to-leading order (NLO) in QCD, in the POWHEG framework, which is a method that allows the interfacing of NLO calculations to shower Monte Carlo programs. This is the first 2 -> 4 process to be described to NLO accuracy within a shower Monte Carlo framework. The implementation was built within the POWHEGBOX package. We discuss a few technical improvements that were needed in the POWHEGBOX to deal with the computer intensive nature of the NLO calculation, and argue that further improvements are possible, so that the method can match the complexity that is reached today in NLO calculations. We have interfaced our POWHEG implementation with PYTHIA and HERWIG, and present some phenomenological results, discussing similarities and differences between the pure NLO and the POWHEG+PYTHIA calculation both for inclusive and more exclusive distributions. We have made the relevant code available at the POWHEGBOX web site.
description: 16 pages, 5 figures
title: ÐÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ñ Ð¸ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ðµ ÑÐ¸ÑÑÐµÐ¼Ð¾Ð¹ Ð½ÐµÐ¿ÑÐµÑÑÐ²Ð½Ð¾Ð³Ð¾ Ð¿Ð»Ð°Ð½Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð¿ÑÐ¸ Ð¿Ð¾Ð·Ð°ÐºÐ°Ð·Ð½Ð¾Ð¼ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´ÑÑÐ²ÐµÐ½Ð½Ð¾Ð¼ ÑÑÐµÑÐµ
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: Organization and management of continous system in orderly production accounting
Creators: name: Ð¡ÑÐ½ÑÐ¾Ð², ÐÐ»ÐµÐºÑÐµÐ¹
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: 2018
Subjects: ÐÐ½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¾Ð½Ð½ÑÐµ ÑÐ¸ÑÑÐµÐ¼Ñ
ÐÐ°ÑÐ¸Ð½Ð¾ÑÑÑÐ¾ÐµÐ½Ð¸Ðµ
Ð¿Ð»Ð°Ð½Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´ÑÑÐ²Ð°
Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´ÑÑÐ²ÐµÐ½Ð½ÑÐ¹ ÑÑÐµÑ

description: Ð Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ Ð¸Ð·Ð»Ð¾Ð¶ÐµÐ½Ð° ÑÑÑÐ½Ð¾ÑÑÑ Ð¿Ð¾Ð´ÑÐ¾Ð´Ð° Ðº ÑÐ¾Ð·Ð´Ð°Ð½Ð¸Ñ Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¾Ð½Ð½Ð¾Ð¹ ÑÐ¸ÑÑÐµÐ¼Ñ Ð¿Ð»Ð°Ð½Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´ÑÑÐ²Ð° Ð½Ð° Ð±Ð°Ð·Ðµ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ ÐÐÐ Â«ÐÐÐÐÐÐÐÐÐ ÐÐ¤ÐÐÐ¨Â». ÐÐ°Ð½Ñ Ð¾Ð±ÑÐ¸Ðµ Ð¿Ð¾Ð½ÑÑÐ¸Ñ Ð¸ ÐºÐ»Ð°ÑÑÐ¸ÑÐ¸ÐºÐ°ÑÐ¸Ñ Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¾Ð½Ð½ÑÑ ÑÐ¸ÑÑÐµÐ¼ ÑÐ°ÐºÐ¾Ð³Ð¾ ÐºÐ»Ð°ÑÑÐ°. ÐÑÑÐ²Ð»ÐµÐ½Ñ ÑÑÐµÐ±Ð¾Ð²Ð°Ð½Ð¸Ñ Ð´Ð»Ñ ÑÐ¾Ð·Ð´Ð°Ð½Ð¸Ñ Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¾Ð½Ð½ÑÑ ÑÐ¸ÑÑÐµÐ¼ Ð¸ Ð½Ð°Ð¹Ð´ÐµÐ½Ñ Ð¿ÑÑÐ¸ Ð¸Ñ ÑÐ´Ð¾Ð²Ð»ÐµÑÐ²Ð¾ÑÐµÐ½Ð¸Ñ. ÐÐ·ÑÑÐµÐ½Ñ ÑÐ¸Ð»ÑÐ½ÑÐµ Ð¸ ÑÐ»Ð°Ð±ÑÐµ ÑÑÐ¾ÑÐ¾Ð½Ñ Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¾Ð½Ð½ÑÑ ÑÐ¸ÑÑÐµÐ¼. Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ñ Ð¿ÑÐµÐ´Ð»Ð¾Ð¶ÐµÐ½Ð¸Ñ Ð¿Ð¾ ÑÐ¾Ð²ÐµÑÑÐµÐ½ÑÑÐ²Ð¾Ð²Ð°Ð½Ð¸Ñ ÑÐ°Ð±Ð¾ÑÑ MES - ÑÐ¸ÑÑÐµÐ¼.
description: In this work, the essence of the approach to the creation of an information system of planning for production based on the enterprise of JSC LENPOLIGRAFMASH is expounded. The general concepts and classification of information systems of this class are given. The requirements for the creation of information systems are identified and ways of their solution are found. The strengths and weaknesses of information systems have been studied. The proposals for improving the operation of MES - systems have been developed.
Investitionsplanung unter Unsicherheit – Ein agentenbasierter Ansatz für liberalisierte Strommärkte
Creators: name: Miskiw, Kim Kira
name: Fraunholz, Christoph
name: Kraft, Emil
Publisher: name: Karlsruher Institut für Technologie (KIT)
Year: 2021
Subjects: Strommarktmodellierung
Agentenbasierte Simulation
Investitionsplanung
Unsicherheit
Strommarktdesign

description: In liberalisierten Strommärkten bilden umfassende Wirtschaftlichkeitsbewertungen die Basis für Investitionsentscheidungen. Unter anderem aufgrund der Kapitalintensität sowie langfristiger Investitionshorizonte verhalten sich Investoren dabei in hohem Maße risikoavers. In diesem Beitrag wird das agentenbasierte Strommarktmodell PowerACE um die Berücksichtigung von Unsicherheiten und dem damit verbundenen Risiko für die Ausbauplanung erweitert. Für die Generierung der Szenarios werden verschiedene Wetterjahre derart kombiniert, dass das Ausmaß der Volatilität der Residuallast repräsentativ über den gesamten Investitionshorizont abgebildet wird. Mithilfe der Szenarios wird eine Verteilung der Profitabilität abgeleitet, auf deren Basis für die Bewertung von Investitionsoptionen neben der erwarteten Profitabilität auch der Conditional Value-at-Risk in einem multikriteriellen Entscheidungskalkül berücksichtigt wird. Die Ergebnisse werden in Bezug auf die Entwicklung der europäischen Kraftwerkskapazitäten, der Day-Ahead Marktpreise sowie der Versorgungssicherheit ausgewertet. Bei einer Investitionsplanung unter Risikoaversion ergibt sich gegenüber dem risikoneutralen Fall länderübergreifend ein etwas niedrigeres Kapazitätsniveau. Dies wiederum führt zu negativen Auswirkungen auf die Versorgungssicherheit in Form häufigerer Knappheitssituationen sowie generell erhöhten Day-Ahead Marktpreisen. Diese Ergebnisse verdeutlichen die Relevanz einer geeigneten Abbildung der Risikoaversion von Investoren im Kontext der Diskussion um ein angemessenes Marktdesign für sehr hohe Anteile erneuerbarer Energien.
The Properties of X-ray Luminous Young Stellar Objects in the NGC 1333 and Serpens Embedded Clusters
Creators: name: Winston, E.
name: Megeath, S. T.
name: Wolk, S.
name: Spitzbart, B.
name: Gutermuth, R.
name: Allen, L. E.
name: Hernandez, J.
name: Covey, K.
name: Muzerolle, J.
name: Hora, J. L.
name: Myers, P. C.
name: Fazio, G. G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present Chandra X-ray data of the NGC 1333 embedded cluster, combining these data with existing Chandra data, Sptizer photometry and ground based spectroscopy of both the NGC 1333 & Serpens North clusters to perform a detailed study of the X-ray properties of two of the nearest embedded clusters to the Sun. In NGC 1333, a total of 95 cluster members are detected in X-rays, of which 54 were previously identified with Spitzer. Of the Spitzer sources, we detect 23% of the Class I protostars, 53% of the Flat Spectrum sources, 52% of the Class II, and 50% of the Transition Disk YSOs. Forty-one Class III members of the cluster are identified, bringing the total identified YSO population to 178. The X-ray Luminosity Functions (XLFs) of the NGC 1333 and Serpens clusters are compared to each other and the Orion Nebula Cluster. Based on this comparison, we obtain a new distance for the Serpens cluster of 360+22/-13 pc. The X-ray luminosity was found to depend on the bolometric luminosity as in previous studies of other clusters, and that Lx depends primarily on the stellar surface area. In the NGC 1333 cluster, the Class III sources have a somewhat higher X-ray luminosity for a given surface area. We also find evidence in NGC 1333 for a jump in the X-ray luminosity between spectral types of M0 and K7, we speculate that this may result from the presence of radiative zones in the K-stars. The gas column density vs. extinction in the NGC 1333 was found to be N_H = 0.89 +/- 0.13 x 10^22 A_K, this is lower than expected of the standard ISM but similar to that found previously in the Serpens Cloud Core.
description: 58 pages, 14 figures, accepted by AJ
Thinking like a creditor : risk, leverage and multilateralism in China's development finance
Creators: name: Zhang, Linting
Publisher: name: University of British Columbia
Year: 2019

description: The establishment of the Asia Infrastructure Investment Bank (AIIB) by China has raised many questions from global public. Most importantly, what are China’s motivations behind the decision of the AIIB? And why does multilateralism become a favored approach in China’s international development finance? Contrary to existing explanations which mainly focus on China’s strategic and geopolitical ambitions, this thesis provides a functionalist and pragmatic perspective: the economic rise of China has enabled the communist state to become a major sovereign creditor in international finance landscape in recent years. However, this new position in global financial system also brings China many structural challenges faced by other similar sovereign creditors, namely management of various lending risk and private fund leverage. To safeguard its valuable financial resources, China turns to multilateralism and multilateral institutions such as the AIIB, because they could be utilized as reliable and effective financial vehicles to help sovereign creditors like China in collecting information, hedging credibility problem, sharing burden and risk with others, as well as tapping private capital to supplement its financing goals.
title: Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ° Ð¸ÑÑÐ¾ÑÐ½Ð¸ÐºÐ° Ð¿Ð¸ÑÐ°Ð½Ð¸Ñ Ð´Ð»Ñ Ð½Ð°Ð¿ÑÐ»ÐµÐ½Ð¸Ñ Ð¼Ð¾ÑÐ½Ð¾ÑÑÑÑ 60 ÐºÐÑ
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: Development of a power source for deposition with a power of 60 kW
Creators: name: Ð ÑÐ½ÑÐµÐ², ÐÐ»ÐµÐºÑÐµÐ¹
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: Ð½Ð°Ð¿ÑÐ»ÐµÐ½Ð¸Ðµ Ð¿Ð¾ÐºÑÑÑÐ¸Ð¹
Ð¸ÑÑÐ¾ÑÐ½Ð¸Ðº Ð¿Ð¸ÑÐ°Ð½Ð¸Ñ
Ð¿Ð»Ð°Ð·Ð¼Ð°ÑÑÐ¾Ð½
ÐÐÐ
ÑÐ¿ÑÐ°Ð²Ð»ÑÐµÐ¼ÑÐ¹ Ð²ÑÐ¿ÑÑÐ¼Ð¸ÑÐµÐ»Ñ
Ð²Ð½ÐµÑÐ½Ð¸Ðµ Ð¸ ÑÐµÐ³ÑÐ»Ð¸ÑÐ¾Ð²Ð¾ÑÐ½ÑÐµ Ñ Ð°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸ÐºÐ¸
Ð¾Ð±ÑÐ°ÑÐ½Ð°Ñ ÑÐ²ÑÐ·Ñ
coating deposition
power supply
plasma torch
APR
controlled rectifier
external and control characteristics
feedback

description: ÐÐ°Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐµ Ð¸ÑÑÐ¾ÑÐ½Ð¸ÐºÐ° Ð¿Ð¸ÑÐ°Ð½Ð¸Ñ Ð´Ð»Ñ Ð½Ð°Ð¿ÑÐ»ÐµÐ½Ð¸Ñ Ð¿Ð¾ÐºÑÑÑÐ¸Ð¹. Ð¡Ð½Ð°ÑÐ°Ð»Ð° Ð¿ÑÐ¸Ð²Ð¾Ð´Ð¸ÑÑÑ ÐºÑÐ°ÑÐºÐ¾Ðµ Ð¾Ð¿Ð¸ÑÐ°Ð½Ð¸Ðµ Ð¾ÑÐ½Ð¾Ð²Ð½ÑÑ Ð²Ð¸Ð´Ð¾Ð² Ð½Ð°Ð¿ÑÐ»ÐµÐ½Ð¸Ñ Ð¿Ð¾ÐºÑÑÑÐ¸Ð¹, ÑÐ°ÐºÐ¶Ðµ Ð´Ð°Ð»ÐµÐµ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´Ð¸ÑÑÑ Ð¾Ð¿Ð¸ÑÐ°Ð½Ð¸Ðµ Ð¾Ð±Ð¾ÑÑÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ. ÐÐ° Ð¾ÑÐ½Ð¾Ð²Ñ Ð±ÑÐ» Ð²ÑÐ±ÑÐ°Ð½ Ð¸ÑÑÐ¾ÑÐ½Ð¸Ðº Ð¿Ð¸ÑÐ°Ð½Ð¸Ñ ÐÐÐ -404. ÐÐ°Ð´Ð°ÑÐ¸, ÐºÐ¾ÑÐ¾ÑÑÐµ ÑÐµÑÐ°Ð»Ð¸ÑÑ Ð² ÑÐ¾Ð´Ðµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ: 1. ÐÐ·ÑÑÐµÐ½Ð¸Ðµ ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ð¸ Ð¸ Ð¿ÑÐ¸Ð½ÑÐ¸Ð¿Ð° ÑÐ°Ð±Ð¾ÑÑ Ð¾Ð±Ð¾ÑÑÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ, Ð¿ÑÐµÐ´Ð½Ð°Ð·Ð½Ð°ÑÐµÐ½Ð½Ð¾Ð³Ð¾ Ð´Ð»Ñ Ð½Ð°Ð¿ÑÐ»ÐµÐ½Ð¸Ñ Ð¿Ð¾ÐºÑÑÑÐ¸Ð¹. 2. ÐÑÐ±Ð¾Ñ Ð¸ÑÑÐ¾ÑÐ½Ð¸ÐºÐ° Ð¿Ð¸ÑÐ°Ð½Ð¸Ñ. 3. Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ° Ð¸ÑÑÐ¾ÑÐ½Ð¸ÐºÐ° Ð¿Ð¸ÑÐ°Ð½Ð¸Ñ Ð¸ ÑÐ½ÑÑÐ¸Ðµ ÐµÐ³Ð¾ Ð½Ð°Ð³ÑÑÐ·Ð¾ÑÐ½ÑÑ Ð¸ ÑÐµÐ³ÑÐ»Ð¸ÑÐ¾Ð²Ð¾ÑÐ½ÑÑ ÑÐ°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸Ðº, ÐºÐ¾ÑÐ¾ÑÑÐµ Ð±ÑÐ»Ð¸ Ð¿Ð¾Ð»ÑÑÐµÐ½Ñ Ð² ÑÐ¾Ð´Ðµ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð² Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ð½Ð¾Ð¼ Ð¾Ð±ÐµÑÐ¿ÐµÑÐµÐ½Ð¸Ð¸ Matlab-Simulink. 4. ÐÐ¾Ð´ÐµÑÐ½Ð¸Ð·Ð°ÑÐ¸Ñ Ð¸ÑÑÐ¾ÑÐ½Ð¸ÐºÐ° Ð·Ð° ÑÑÐµÑ Ð²Ð²ÐµÐ´ÐµÐ½Ð¸Ñ ÑÐ¸ÑÑÐ¾Ð²Ð¾Ð¹ ÑÐ¸ÑÑÐµÐ¼Ñ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ñ Ð¾Ð±ÑÐ°ÑÐ½Ð¾Ð¹ ÑÐ²ÑÐ·ÑÑ. 5. Ð¡ÑÐ°Ð²Ð½Ð¸ÑÐµÐ»ÑÐ½ÑÐ¹ Ð°Ð½Ð°Ð»Ð¸Ð· ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐ¾Ð² ÑÐ°Ð±Ð¾ÑÑ Ð¸ÑÑÐ¾ÑÐ½Ð¸ÐºÐ° Ð¿Ð¸ÑÐ°Ð½Ð¸Ñ Ð² ÑÐ°Ð·Ð»Ð¸ÑÐ½ÑÑ ÑÐµÐ¶Ð¸Ð¼Ð°Ñ.
description: This work is devoted to the development of a power source for coating deposition. First, a brief description of the main types of coating spraying is given, and then a description of the equipment is also made. The APR-404 power supply was chosen as the basis. Tasks that were solved in the course of the study: 1. Study of the design and principle of operation of equipment designed for spraying coatings. 2. Choice of power source. 3. Development of a power source and recording of its load and control characteristics, which were obtained during simulation in the Matlab-Simulink software. 4. Modernization of the source by introducing a digital feedback control system. 5. Comparative analysis of the results of the power supply in various modes.