cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Design and Control of a Hydraulic Based Tire Changer using H infinity and H2 Optimal Synthesis Controllers
Creators: name: Mustefa Jibril
Publisher: name: figshare
Year: 2020
Subjects: subject: 120402 Engineering Design Knowledge
subject: FOS: Other engineering and technologies

description: In this paper, the design and control of a hydraulic system based tire changer machine have beenanalyzed and simulated using Matlab/Simulink Toolbox successfully. The machine have adisplacement input which is a leg pedal displacement in order to push the piston of the pump tofed the motor with a pressured hydraulic fluid to rotate the tire with an angular speed to mount anddismount it. Augmentation based H infinity and H2 optimal synthesis controllers have been used toimprove the performance of the machine. Comparison of the proposed controllers for tracking areference input speed have been done using two reference inputs (step and random) signals. Finallythe comparative simulation results proved the effectiveness of the proposed tire changer with H infinitysynthesis controller in improving the settling time and percentage overshoot.
Welfare Effects of Mandatory Traceability When Firms are Heterogeneous
Creators: name: Pouliot, Sebastien
name: Pouliot, Sebastien
Publisher: name: Unknown
Year: 2010
Subjects: subject: Industrial Organization
subject: Marketing
subject: FOS: Economics and business
subject: Production Economics
subject: Food safety
subject: quality
subject: traceability
subject: regulation

description: We develop a framework in which the cost of producing a quantity food and the cost of food safety differs across firms. We show that large firms may supply the safest food even though small firms have a cost advantage in producing safe food. The model shows that mandatory traceability can decrease the overall safety of food when small firms that supply the safest food exit the industry. Our model applies to food safety but can be applied to a wide range of issues related to regulation and product quality.
Comparison of a Triple Inverted Pendulum Stabilization using Optimal Control Technique
Creators: name: Mustefa Jibril
Publisher: name: figshare
Year: 2020
Subjects: subject: 120404 Engineering Systems Design
subject: FOS: Other engineering and technologies

description: In this paper, modelling design and analysis of a triple inverted pendulum have been done usingMatlab/Script toolbox. Since a triple inverted pendulum is highly nonlinear, strongly unstablewithout using feedback control system. In this paper an optimal control method means a linearquadratic regulator and pole placement controllers are used to stabilize the triple invertedpendulum upside. The impulse response simulation of the open loop system shows us that thependulum is unstable. The comparison of the closed loop impulse response simulation of thependulum with LQR and pole placement controllers results that both controllers have stabilizedthe system but the pendulum with LQR controllers have a high overshoot with long settling timethan the pendulum with pole placement controller. Finally the comparison results prove that thependulum with pole placement controller improve the stability of the system.
Visual feedback from ultrasound in remediation of persistent /r/ errors : case studies of two adolescents
Creators: name: Adler-Bock, Marcy
Publisher: name: University of British Columbia
Year: 2009

description: This study examines the effectiveness of using visual feedback from ultrasound in remediation of persistent /r/ errors. Ultrasound provides the learner and the clinician with a dynamic sagittal or coronal image of the tongue during speech production. The participants in this study were two adolescent boys ages 12 and 14 who had not yet learned to produce an on-target North American /r/ in any context. Both participants had received at least one year of traditional /r/ therapy without improvement. Therapy was provided over 13 one-hour sessions using visual feed back from ultrasound. Initially, the /r/ was broken down into individual motor targets (tip, body, root); these components were then practiced in combination to produce /r/ in isolation, then in syllables, words, and phrases. Post-treatment improvements were analyzed through transcription, acoustic analysis, and tongue shape measurement. Both participants' /r/ productions were rated as having more tokens of on-target /r/ post-treatment. Acoustic results supported these findings with a lowering of the third formant post-treatment. Tongue shape measures indicated that the participants' tongue shapes were more similar to the modeled tongue shape post-treatment. It was concluded that visual feedback from ultrasound is beneficial in remediation of persistent /r/ errors.
Polarized Structure Functions and the GDH Integral from Lattice QCD
Creators: name: Schierholz, G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Gerasimov-Drell-Hearn integral $I_{GDH}(Q^2)$, and its relation to polarized nucleon structure functions, is discussed from the lattice perspective. Of particular interest is the variation of $I_{GDH}(Q^2)$ with $Q^2$, and what it may teach us about the origin and magnitude of higher-twist contributions.
description: 9 pages, 5 figures; invited talk given at GDH2004, June 2-5, 2004, Norfolk, USA
Nature de causalité entre sphère financière et sphère réelle dans un contexte d'intégration financière de l'économie marocaine.pdf
Creators: name: Rabhi, Ayoub
name: Haoudi, Amina
Publisher: name: figshare
Year: 2020
Subjects: subject: 140302 Econometric and Statistical Methods
subject: FOS: Economics and business
subject: 150202 Financial Econometrics
subject: Economics

description: Le présent papier étudie le lien entre la sphère financière à vocation libérale et l’économie réelle, L’objectif est d’identifier le phénomène d’intégration financière dans les pays émergents et de tester sa contribution dans la croissance économique pour un pays tel que le Maroc. Une investigation empirique par le modèle vectoriel à correction d’erreur (VECM) est mise en oeuvre pour étudier cette relation. Les résultats ressortis de l’analyse économétrique affirment l’existence d’un effet rétroactif entre l’intégration financière et la croissance économique et même un impact significatif à long terme.
Gauge theories and non-commutative geometry
Creators: name: Floratos, E. G.
name: Iliopoulos, J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is shown that a $d$-dimensional classical SU(N) Yang-Mills theory can be formulated in a $d+2$-dimensional space, with the extra two dimensions forming a surface with non-commutative geometry. In this paper we present an explicit proof for the case of the torus and the sphere.
description: 12 pages
Inclusion financière en Afrique .pdf
Creators: name: Rabhi, Ayoub
name: Haoudi, Amina
Publisher: name: figshare
Year: 2020
Subjects: subject: Economics
subject: 140302 Econometric and Statistical Methods
subject: FOS: Economics and business

description: Le terme «inclusion financière» implique l'accès et l'utilisation des services bancaires (compte courant, épargne, assurance, crédit, paiements, etc.) à un faible coût pour la population défavorisée et à faible revenu dans un pays. En fait, les services bancaires ont un caractère de bien public. Il est donc nécessaire que l'accessibilité et l'utilisation équitable des services bancaires par l'ensemble de la population doivent figurer parmi les objectifs primordiaux des politiques gouvernementales et des institutions financières. En effet, cela permet de répondre aux besoins financiers de base de la population dans un pays quelconque. L'objectif principal de notre étude est donc d'examiner les déterminants de la détention d’un compte courant qui est considéré comme étant une dimension basique d’utilisation des services bancaires et par conséquent de l'inclusion financière. Dans notre papier, nous adoptons une approche empirique en données transversales afin d’analyser les éléments qui conditionnent la détention d’un compte courant dans le continent africain.
Effect of delays on health related quality of life outcome after primary total hip arthroplasty
Creators: name: Xu, Min
Publisher: name: University of British Columbia
Year: 2009

description: Objective The main purpose of this research is to investigate the relationship between the waiting time for elective total hip arthroplasty (THA) and changes in the health-related quality of life (HRQOL) outcomes measured at the time of registration on the wait list and one year after the operation. The primary research objective is to assess whether expedited access to THA results in a larger proportion of patients showing "better than expected" lower-extremity function 12 months after the operation. Methods This prospective cohort study was conducted at the Vancouver Hospital & Health Sciences Center. Patients who entered the waiting list for primary THA with osteoarthritis were included in the study. The Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) questionnaire was used to assess each patient at the surgical consultation time (baseline) and one year after the operation (follow up). Log-linear regression models were used to determine whether an individual patient achieved a "better than expected" outcome. Multivariate regression models were used to assess the relationship between waiting time and the probability of achieving a "better than expected" outcome. Results We studied 147 patients at the baseline and at the follow-up assessments. The average waiting time was 6.3 months with a standard deviation of 4.4 months. We found that the baseline WOMAC score is a very significant predictor for the follow up WOMAC score in function (p=0.0005), pain (p=0.0036), and stiffness (p=0.0004). Using an individualized expected outcome based on baseline score, we determined whether a patient experienced the expected achievement through surgery. We found that waiting time was significantly associated with the probability of achieving a "better than expected" function outcome (p=0.05). Conclusions Expedited access to THA results in a larger proportion of patients showing "better than expected" lower-extremity function at 12 months after the operation. Shorter waiting time is associated with the increased probability of achieving a "better than expected" outcome for an individual patient.
Mustilizans lepusa Zolotuhin 2007
Creators: name: Wang, Xing
name: Wang, Min
name: Zolotuhin, Vadim V.
name: Hirowatari, Toshiya
name: Wu, Shipher
name: Huang, Guo-Hua
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Bombycidae
Mustilizans
Mustilizans lepusa

description: 52. Mustilizans lepusa Zolotuhin, 2007 (FIGURES 28 B, 29E)
Mustilizans lepusa Zolotuhin, 2007, Neue ent. Nachr. 60: 198. TL: “Northern Vietnam, Cuc Phuong Nat. Park, 120 km SW Hanoi, 400 m ”. Holotype: male (MWM) [examined].
Diagnosis. Characterized by the following features: forewing with antemedial line arched rather than sinuate, forewing coloration divided into two by submarginal line, distal part reddish-yellow, basal part grayish-yellow; valva ventrally broad, short and folded upwards with blunt apex.
Specimens examined. [SICHUAN] Luding County: 1 male, Mt. Gonggashan, 2.III.2003, Min Wang & Liu- Sheng Chen leg. (SCAU).
Bionomics. The larval host is unknown.
Distribution. Mainland China (Sichuan), Vietnam.
Remarks. This is the first record of this species from China.
description: Published as part of Wang, Xing, Wang, Min, Zolotuhin, Vadim V., Hirowatari, Toshiya, Wu, Shipher & Huang, Guo-Hua, 2015, The fauna of the family Bombycidae sensu lato (Insecta, Lepidoptera, Bombycoidea) from Mainland China, Taiwan and Hainan Islands, pp. 1-138 in Zootaxa 3989 (1) on page 78, DOI: 10.11646/zootaxa.3989.1.1, http://zenodo.org/record/238716
Pré-évaluation de la participation du Maroc à l'union monétaire de la CEDEAO
Creators: name: Rabhi, Ayoub
name: Haoudi, Amina
Publisher: name: figshare
Year: 2020
Subjects: subject: Economics
subject: 140210 International Economics and International Finance
subject: FOS: Economics and business

description: Le choix d’un pays de participer à une union monétaire constitue selon la théorie de la Zone Monétaire Optimal (ZMO), une décision pertinente si les différents participants remplissent un ensemble de critères avancés par cette théorie. Dans ce cadre, la pertinence d’une éventuelle décision du Maroc pour rejoindre la prévue union monétaire de la CEDEAOnécessite une subtilité d’analyse afin de pouvoir évaluer le pré-positionnement économique du Maroc par rapport aux autres membres majeurs de la CEDEAO. Ainsi, notre article apporte quelques réflexions sur les avantages et limites sur cette possible participationà l’union monétaire de la CEDEAO en se basant sur les différentes relations qui existent entre le Maroc et quatre grandes économies de la CEDEAO à savoir : le Nigeria, le Sénégal, le Ghana et la côte d’ivoire.
World Food Prices after WTO Foundation: Deterministic and Non-deterministic Factors
Creators: name: Yu, Xiaohua
name: Meyer, Stefan
name: Yu, Xiaohua
name: Meyer, Stefan
Publisher: name: Unknown
Year: 2010
Subjects: subject: Demand and Price Analysis
subject: Non-Deterministic Factors
subject: World Food Prices
subject: WTO

description: This paper develops a two-step method to estimate the influence of non-deterministic factors in production on food prices, and finds that non-deterministic factors of wheat production do significantly affect both wheat and corn prices in the world and, however, those of corn do not.
Do Americans Change Toward Healthy Diets?
Creators: name: Huang, Kuo S.
name: Huang, Sophia Wu
name: Huang, Kuo S.
name: Huang, Sophia Wu
Publisher: name: Unknown
Year: 2010
Subjects: subject: Health Economics and Policy
subject: Changes in American diet
subject: nutrient economic responses

description: American’s nutritional and health status appear to be trending toward healthier diets, as measured by a reduction in cholesterol intake and an increase in calcium intake. The levels of food energy and total fats, however, increased substantially.
Least $k$th-Order and Rényi Generative Adversarial Networks
Creators: name: Bhatia, Himesh
name: Paul, William
name: Alajaji, Fady
name: Gharesifard, Bahman
name: Burlina, Philippe
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Information Theory (cs.IT)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: We investigate the use of parametrized families of information-theoretic measures to generalize the loss functions of generative adversarial networks (GANs) with the objective of improving performance. A new generator loss function, called least $k$th-order GAN (L$k$GAN), is first introduced, generalizing the least squares GANs (LSGANs) by using a $k$th order absolute error distortion measure with $k \geq 1$ (which recovers the LSGAN loss function when $k=2$). It is shown that minimizing this generalized loss function under an (unconstrained) optimal discriminator is equivalent to minimizing the $k$th-order Pearson-Vajda divergence. Another novel GAN generator loss function is next proposed in terms of Rényi cross-entropy functionals with order $α>0$, $α\neq 1$. It is demonstrated that this Rényi-centric generalized loss function, which provably reduces to the original GAN loss function as $α\to1$, preserves the equilibrium point satisfied by the original GAN based on the Jensen-Rényi divergence, a natural extension of the Jensen-Shannon divergence. Experimental results indicate that the proposed loss functions, applied to the MNIST and CelebA datasets, under both DCGAN and StyleGAN architectures, confer performance benefits by virtue of the extra degrees of freedom provided by the parameters $k$ and $α$, respectively. More specifically, experiments show improvements with regard to the quality of the generated images as measured by the Fréchet Inception Distance (FID) score and training stability. While it was applied to GANs in this study, the proposed approach is generic and can be used in other applications of information theory to deep learning, e.g., the issues of fairness or privacy in artificial intelligence.
Production Contracts and the Spot Market Price of Hogs
Creators: name: Key, Nigel D.
name: Key, Nigel D.
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Farm Management
subject: Industrial Organization
subject: Livestock Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: Production Economics
subject: production contracts
subject: alternative marketing arrangements
subject: market power
subject: spot market price
subject: hogs

description: The increasing use of production contracts in the hog sector has reduced the number of spot market transactions, raised concerns about price manipulation and helped to spur legislation requiring price reporting by packers. Using data from the 2002 and 2007 Censuses of Agriculture, this study looks for evidence of market manipulation by examining whether the local prevalence of contracting affects the average price received by independent producers. The empirical approach uses a fixed-effects model to examine whether the change in the prevalence of contracting is correlated with the change in the spot market price received by individual farmers. This approach controls for unobservable time-invariant individual and county characteristics, such as product quality and location, that might be correlated with price and contracting prevalence. Findings indicate that a negative economically significant relationship between the share of local production delivered under production contracts and the price received by independent producers is unlikely.
Uncovering Productivity Growth in the Disaggregate: Indonesia's Dueling Agricultural Sub-Sectors
Creators: name: Rada, Nicholas E.
name: Buccola, Steven T.
name: Fuglie, Keith O.
name: Rada, Nicholas E.
name: Buccola, Steven T.
name: Fuglie, Keith O.
Publisher: name: Unknown
Year: 2010
Subjects: subject: International Development
subject: Productivity Analysis
subject: Research and Development/Tech Change/Emerging Technologies
subject: agricultural research
subject: Indonesia
subject: Shephard distance function
subject: stochastic frontier
subject: technical change
subject: technical efficiency

description: The success of seed-fertilizer technologies and government subsidies in attaining nearly self-sufficient rice production in the mid-1980s encouraged the Indonesian government soon afterward to shift resources away from food crops and toward export-oriented crops. These shifts were reinforced by trade liberalization and a sharp devaluation of the rupiah after the 1997 Asian financial crisis, which exerted Indonesia’s comparative advantage in tropical perennial products. In the present paper, we ask whether such events have altered Indonesia’s agricultural growth strategy from a food-crop to an export-crop one. With an innovative multi-output stochastic distance frontier model and provincial production and policy-related data from 1985 to 2005, we estimate technology growth by agricultural subsector and efficiency improvement by political jurisdiction. The perennial-crop sector is found to have achieved the highest technology growth rate, followed by the livestock and annual-crop sectors. We find overall productivity growth to have been moderate, and suggest that little of it can be attributed to Indonesia’s public research efforts.
Prospects for Measuring B_s->mu mu with the CMS Detector
Creators: name: Schilling, Frank-Peter
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The flavor-changing neutral current decay B_s->mu mu is highly suppressed in the standard model, but its branching fraction of 3.4*10^-9 could be significantly enhanced through contributions from new physics. At the LHC, this rare decay could be observed for the first time. In this contribution, the prospects for measuring B_s->mu mu with the CMS detector are presented. In particular, some aspects of the experimental setup, the first and high level trigger selections, and the offline analysis are discussed.
description: 5 pages, to appear in the proceedings of BEAUTY 2005, June 20-24, 2005, Assisi (Italy)
Macromechanics and two-body problems
Creators: name: Wang, Huai-Yu
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: A wave function can be written in the form of ψ = ReiS/h. We put this form of wave function into quantum mechanics equations and take hydrodynamic limit, i. e., let Planck constant be zero. Then equations of motion (EOM) describing the movement of macroscopic bodies are retrieved. From Schrodinger equation, we obtain Newtonian mechanics, including Newtons three laws of motion; from decouple Klein-Gordon equation with positive kinetic energy (PKE), we obtain EOM of special relativity in classical mechanics. These are for PKE systems. From negative kinetic energy (NKE) Schrodinger equation and decoupled Klein-Gordon equation, the EOM describing low momentum and relativistic motions of macroscopic dark bodies are derived. These are NKE systems, i. e., dark systems. In all cases scalar and vector potentials are also taken into account. The formalism obtained is collectively called macromechanics. For an isolated system containing PKE and NKE bodies, both total momentum and total kinetic energy are conserved. A dark ideal gas produces a negative pressure, and its microscopic mechanism is disclosed. Two-body problems, where at least one is of NKE, are investigated for both macroscopic bodies and microscopic particles. A NKE proton and a PKE electron can compose a stable PKE atom, and its spectral lines have blue shifts compared to a hydrogen atom. The author suggests to seek for these spectral lines in celestial spectra. This provides a way to seek for dark particles in space. Elastic collisions between a body and a dark body are researched.
description: 26 pages, 4 figures, 2 tables
Production Contracts and Farm Business Growth and Survival
Creators: name: Key, Nigel D.
name: Key, Nigel D.
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Farm Management
subject: Industrial Organization
subject: Livestock Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: Production Economics
subject: production contracts
subject: farm structure
subject: farm business exit rate
subject: instrumental variables
subject: hogs

description: In recent decades there has been a substantial increase in the scale of production and the use of production contracts in the hog sector. This paper explores empirically whether these two phenomena are related by examining whether the use of production contracts has allowed finish hog operations to expand in scale. The study takes advantage of recently collected information from the Census of Agriculture that permits a comparisons of individual independent and contract hog producers over time. The study first examines whether operations that used a contract grew at a faster rate or had lower exit rates over the subsequent five-year period than did operations that produced independently, controlling for observable factors. The study then examines how the adoption of a production contract affected subsequent farm size growth. To address the potential endogeneity of contract adoption, the availability of contracting is used as an instrumental variable. The instrumental variable approach makes it credible to assert that the association between contract adoption and growth is a causal relationship.
Mustilizans sinjaevi Zolotuhin 2007
Creators: name: Wang, Xing
name: Wang, Min
name: Zolotuhin, Vadim V.
name: Hirowatari, Toshiya
name: Wu, Shipher
name: Huang, Guo-Hua
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Bombycidae
Mustilizans
Mustilizans sinjaevi

description: 53. Mustilizans sinjaevi Zolotuhin, 2007 (FIGURES 28 C–28D, 29F)
Mustilizans sinjaevi Zolotuhin, 2007, Neue ent. Nachr. 60: 198. TL: “Northern Vietnam, Mt. Fan-si-pan, Cha-pa, 2400 m ”. Holotype: male (MWM) [examined].
Diagnosis. Characterized by forewing with area distal to submarginal line reddish-yellow or yellow-green, antemedial line wavy, and submarginal line with upper half obscure.
Specimens examined. [SICHUAN] 1 male, road from Decheng to Miyi, 2700 m, 27°02′N, 102°01′E, 29.III.2011, Floxiaomi & A. Saldaltis leg. (MWM); [HAINAN] Ledong County (Jianfengling National NR): 1 male, 29.II.2003, Guo-Hua Huang leg. (SCAU); 2 males, 12.IV.2009, Min Wang & Hou-Shuai Wang leg. (HUNAU); Lingshui County (Diaoluoshan National NR): 8 males, 24.V.2004, Liu-Sheng Chen & Min Wang leg. (SCAU); Baisha County (Yinggeling National NR): 1 male, Daoyin Village, 4.XI.2005, Min Wang & Hou-Shuai Wang leg. (SCAU); [YUNNAN] Dali County: 1 male (paratype), 230 km N. Dali city, 2200 m, 23–27.IV.1998 (MWM); Changyuan County: 1 male (paratype), Guokandashan Mountain, September 1999, local collector leg. (MWM); Yunlong County: 3 males (paratypes), Fengshuining Mountain, 13 km N Caojian, 2460 m, 25˚46’N, 99˚06’E, 10–20.V.1999, R. Brechlin leg. (MWM); 1 male (paratype), the same data except 20.V–9.VI.1999 (MWM); [XIZANG] 1 male (paratype), Tibet, brigde to Yarlung Tsampo, road Pome-Nyigtri, 2200 m, 30˚01’N, 95˚00’E, 28.V.2001, G.C. Beckong leg. (ZFMK).
Bionomics. The larval host is unknown.
Distribution. China (Sichuan, Yunnan, Xizang) and Hainan, Vietnam.
Remarks. This species is endemic to the Southeastern Himalaya.
description: Published as part of Wang, Xing, Wang, Min, Zolotuhin, Vadim V., Hirowatari, Toshiya, Wu, Shipher & Huang, Guo-Hua, 2015, The fauna of the family Bombycidae sensu lato (Insecta, Lepidoptera, Bombycoidea) from Mainland China, Taiwan and Hainan Islands, pp. 1-138 in Zootaxa 3989 (1) on page 79, DOI: 10.11646/zootaxa.3989.1.1, http://zenodo.org/record/238716
The Land Grant College: Repositioning to Meet the Needs of a Rapidly Changing Food, Agriculture, and Natural Resource System
Creators: name: Thompson, Robert L.
name: Thompson, Robert L.
Publisher: name: Unknown
Year: 1997
Subjects: subject: Agribusiness
subject: Teaching/Communication/Extension/Profession
subject: Land grant college
subject: Education
subject: Cooperative extension service
subject: Teaching
subject: Research

description: The land grant college of food, agriculture and natural resources constitutes a major historical innovation. Land grant colleges need to continue to do cutting edge science and education as well as maintain the outreach function to maintain state appropriations. Moreover, fund raising is going to have to be broader than it historically has been.
Nature de causalité entre sphère financière et sphère réelle dans un contexte d'intégration financière de l'économie marocaine.pdf
Creators: name: Rabhi, Ayoub
Publisher: name: figshare
Year: 2020
Subjects: subject: 140302 Econometric and Statistical Methods
subject: FOS: Economics and business
subject: 150202 Financial Econometrics
subject: Economics

description: Le présent papier étudie le lien entre la sphère financière à vocation libérale et l’économie réelle, L’objectif est d’identifier le phénomène d’intégration financière dans les pays émergents et de tester sa contribution dans la croissance économique pour un pays tel que le Maroc. Une investigation empirique par le modèle vectoriel à correction d’erreur (VECM) est mise en oeuvre pour étudier cette relation. Les résultats ressortis de l’analyse économétrique affirment l’existence d’un effet rétroactif entre l’intégration financière et la croissance économique et même un impact significatif à long terme.
Submillimeter Observations of Low Metallicity Galaxy NGC 4214
Creators: name: Kiuchi, Gaku
name: Ohta, Kouji
name: Sawicki, Marcin
name: Allen, Michael
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Results of submillimeter (450 micron and 850 micron) observations of a nearby dwarf irregular galaxy NGC 4214 with SCUBA on JCMT are presented. We aimed at examining the far-infrared to submillimeter spectral energy distribution (SED) and properties of dust thermal emission in a low metallicity environment by choosing NGC 4214 of which gas metallicity (log O/H + 12) is 8.34. We found that the SED is quite similar to those of IRAS bright galaxies sample (IBGS) which are local bright star-forming galaxies with metallicity comparable to the solar abundance. A dust temperature and an emissivity index for NGC 4214 obtained by a fitting to the single temperature greybody model are T_d = 35 \pm 0.8 K and beta = 1.4 \pm 0.1, respectively, which are typical values for IBGS. Compiling the previous studies on similar nearby dwarf irregular galaxies, we found that NGC 1569 shows similar results to those of NGC 4214, while NGC 4449 and IC 10 SE show different SEDs and low emissivity indices. There seems to be a variety of SEDs among metal poor dwarf irregular galaxies. We examined dependence on intensity of interstellar radiation field as well as two-temperature model, but the origin of the difference is not clear. Some mechanism(s) other than metallicity and interstellar radiation field must be responsible for controlling dust emission property.
description: 17 pages, 6 figures, accepted for publication in AJ
Turbulent impurity transport simulations in Wendelstein 7-X plasmas
Creators: name: García-Regaña, J. M.
name: Barnes, M.
name: Calvo, I.
name: Parra, F. I.
name: Alcusón, J.
name: Davies, R.
name: González-Jerez, A.
name: Mollén, A.
name: Sánchez, E.
name: Velasco, J. L.
name: Zocco, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A study of turbulent impurity transport by means of quasilinear and nonlinear gyrokinetic simulations is presented for Wendelstein 7-X (W7-X). The calculations have been carried out with the recently developed gyrokinetic code stella. Different impurity species are considered in the presence of various types of background instabilities: ITG, TEM and ETG modes for the quasilinear part of the work; ITG and TEM for the nonlinear results. While the quasilinear approach allows one to draw qualitative conclusions about the sign or relative importance of the various contributions to the flux, the nonlinear simulations quantitatively determine the size of the turbulent flux and check the extent to which the quasilinear conclusions hold. Although the bulk of the nonlinear simulations are performed at trace impurity concentration, nonlinear simulations are also carried out at realistic effective charge values, in order to know to what degree the conclusions based on the simulations performed for trace impurities can be extrapolated to realistic impurity concentrations. The presented results conclude that the turbulent radial impurity transport in W7-X is mainly dominated by ordinary diffusion, which is close to that measured during the recent W7-X experimental campaigns. It is also confirmed that thermo-diffusion adds a weak inward flux contribution and that, in the absence of impurity temperature and density gradients, ITG- and TEM-driven turbulence push the impurities inwards and outwards, respectively.
description: 19 pages, 10 figures, 2 tables
Nonlinear Lattices Generated from Harmonic Lattices with Geometric Constraints
Creators: name: Takeno, S.
name: Dmitriev, S. V.
name: Kevrekidis, P. G.
name: Bishop, A. R.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Geometrical constraints imposed on higher dimensional harmonic lattices generally lead to nonlinear dynamical lattice models. Helical lattices obtained by such a procedure are shown to be described by sine- plus linear-lattice equations. The interplay between sinusoidal and quadratic potential terms in such models is shown to yield localized nonlinear modes identified as intrinsic resonant modes.
SEPARABILIDADE DE FATORES DE PRODUÇÃO NA ESTIMAÇÃO DE FUNÇÕES TRANSLOG DE CUSTO
Creators: name: Neto, Armando Chinelatto
name: Teixeira, Erly Cardoso
name: Neto, Armando Chinelatto
name: Teixeira, Erly Cardoso
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agribusiness
subject: Agricultural Finance
subject: Industrial Organization
subject: translog cost function
subject: inputs aggregation
subject: separability.

description: The objective of this paper is to evaluate the aggregation of production factors in a variable called Inputs in coffee production in Brazil. A translog cost function and a separability test are used, based on estimates of the Allen-Uzawa partial elasticity of substitution. The results demonstrate the possibilities of input separability analyses. Input substitutability relations and other effects, such as exchange rate devaluation, on each production factor, can be examined.
Adamts expression in the human decidua of early pregnancy
Creators: name: Ng, York Hunt
Publisher: name: University of British Columbia
Year: 2009

description: The spatio-temporal expression of interleukin (IL)-1β and transforming growth factor (TGF)- β1 in the human endometrium suggests that these two cytokines act in concert with gonadal steroids to create a uterine environment that is capable of supporting a viable pregnancy. The highly regulated series of developmental events that culminates in the terminal differentiation of the stromal cells into deciduas in preparation for implantation is mediated by alterations in the composition of the endometrial extracellular matrix (ECM). Consequently, matrix metalloproteinases have been assigned central roles in implantation and placentation. I hypothesized that members of a novel family of metalloproteinases, the ADAMTS, may mediate certain proteolytic events that are operative at the maternal-fetal interface. A comprehensive survey of the ADAMTS subtypes present in first trimester human decidual tissue was performed. In addition, I have examined the ability of IL-1β and TGF-β1 to regulate the mRNA and protein levels of one of these endometrial ADAMTS subtypes, ADAMTS-1, in primary cultures of stromal cells isolated from first trimester decidua. The mRNA transcripts encoding ADAMTS-1, -2, -3, -4, -5 (-11), -6, -7, -8, -9, -10 and -12 are present in first trimester human deciduas. ADAMTS-1 mRNA transcript and protein expression were detected in all of the decidual stromal cell cultures using quantitative-competitive-polymerase chain reaction (QC-PCR) and Western blotting strategies. IL-βl (0-1000 IU) increased ADAMTS-1 mRNA and protein levels in decidual stromal cell cultures in a dosedependent manner. Significantly increased ADAMTS-1 mRNA and protein levels were also detected in cells cultured for 24 hours in the presence of a fixed amount of IL-1β (100 IU), with maximum levels being observed after 48 hours. In contrast, increasing concentrations of TGF-β1 (0-10 ng) decreased ADAMTS-1 mRNA and protein levels in these cells in a dose-dependent manner. Furthermore, a fixed concentration of TGF-β1 (5 ng) effected a significant time-dependent decrease in ADAMTS-1 mRNA and protein levels in decidual stromal cells that was readily apparent at 24 hours and continued to decline until the study was terminated at 48 hours. Collectively, these studies indicate that IL-1β and TGF-β1 have differential effects on ADAMTS-1 mRNA and protein levels in decidual stromal cells in vitro. These results suggest that cytokine-mediated regulation of ADAMTS-1 expression, and potentially of other ADAMTS family members, may be important in stromal cell differentiation that is essential for decidual function during early pregnancy.
Signal processing by opto-optical interactions between self-localized and free propagating beams in liquid crystals
Creators: name: Pasquazi, Alessia
name: Alberucci, Alessandro
name: Peccianti, Marco
name: Assanto, Gaetano
Publisher: name: arXiv
Year: 2005
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The reorientational nonlinearity of nematic liquid crystals enables a self-localized spatial soliton and its waveguide to be deflected or destroyed by a control beam propagating across the cell. We demonstrate a simple all-optical readdressing scheme by exploiting the lens-like perturbation induced by an external beam on both a nematicon and a co-polarized guided signal of different wavelength. Angular steering as large as 2.2 degrees was obtained for control powers as low as 32mW in the near infrared.
The Development of Index Futures Contracts for Fruits and Vegetables
Creators: name: Manfredo, Mark R.
name: Libbin, James D.
name: Manfredo, Mark R.
name: Libbin, James D.
Publisher: name: Unknown
Year: 1998
Subjects: subject: Agribusiness
subject: Agricultural Finance
subject: Marketing
subject: FOS: Economics and business
subject: Fruits
subject: Vegetables
subject: Futures markets
subject: Index futures contracts

description: The fruit and vegetable industry does not have a risk management instrument or a well-structured price discovery system, such as commodity futures contracts, to aid in the marketing and management of its price risk. Since the 1980s, financial futures contracts based on indexes of stocks, commodities and currencies have been used to hedge these groups of assets. The purpose of this study was to apply the concept of index futures contracts to the produce industry by developing indexes based on prices of fruits and vegetables and to determine the hedging effectiveness of potential futures contracts written on these indexes. Twenty representative fruits and vegetables were chosen to compile indexes for fruits, for vegetables, and for fruits and vegetables together using a trade-weighted arithmetic average of 1989 to 1992 wholesale prices of selected commodities traded on the Dallas Wholesale Fruit and Vegetable Market. The indexes were then tested by simulating a short and long hedge of a portfolio of commodities and by cross hedging selected individual New Mexico and California produce commodities with the indexes.
Global Aspects of Doubled Geometry and Pre-rackoid
Creators: name: Ikeda, Noriaki
name: Sasaki, Shin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The integration problem of a C-bracket and a Vaisman (metric, pre-DFT) algebroid which are geometric structures of double field theory (DFT) is analyzed. We introduce a notion of a pre-rackoid as a global group-like object for an infinitesimal algebroid structure. We propose that several realizations of pre-rackoid structures. One realization is that elements of a pre-rackoid are defined by cotangent paths along doubled foliations in a para-Hermitian manifold. Another realization is proposed as a formal exponential map of the algebroid of DFT. We show that the pre-rackoid reduces to a rackoid that is the integration of the Courant algebroid when the strong constraint of DFT is imposed. Finally, for a physical application, we exhibit an implementation of the (pre-)rackoid in a three-dimensional topological sigma model.
description: 31 pages, 1 figure, version appeared in JMP
A quantum Monte Carlo study on the superconducting Kosterlitz-Thouless transition of the attractive Hubbard model on a triangular lattice
Creators: name: Nakano, Tsuguhito
name: Kuroki, Kazuhiko
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the superconducting Kosterlitz-Thouless transition of the attractive Hubbard model on a two-dimensional triangular lattice using auxiliary field quantum Monte Carlo method for system sizes up to $12\times 12$ sites. Combining three methods to analyze the numerical data, we find, for the attractive interaction of $U=-4t$, that the transition temperature stays almost constant within the band filling range of $1.0 < n < 1.4$, while it is found to be much lower in the $n<1$ region.
description: RevTeX 6 pages
The Effect of Technological Change on Demand and Supply of Hired Farm Workers in the United States
Creators: name: Mishra, Ashok K.
name: Rezitis, Anthony N.
name: Mishra, Ashok K.
name: Rezitis, Anthony N.
Publisher: name: Unknown
Year: 1998
Subjects: subject: Agribusiness
subject: Labor and Human Capital
subject: Elasticity
subject: Hired workers
subject: Technological change
subject: Total expenditures

description: This paper investigates the effect of technological change on the demand for, and supply of, hired farm workers in the United States for the period 1950 to 1992. Particular attention is given to the proxy for technological change. We have used total expenditures, both by public and private sectors, for research and development in the field of agriculture. We find that technology has a negative impact on the hired labor demand after the second and third year of initial investment. Our results show that technology is labor saving. The demand and supply elasticities were found to differ from other studies. We also derive elasticities of adjustment and draw some policy conclusions. The paper also presents a dynamic-in-period simulation of the estimated model.
The supermembrane revisited
Creators: name: Howe, P. S.
name: Sezgin, E.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The M2-brane is studied from the perspective of superembeddings. We review the derivation of the M2-brane dynamics and the supergravity constraints from the standard superembedding constraint and we discuss explicitly the induced d=3, N=8 superconformal geometry on the worldvolume. We show that the gauged supermembrane, for a target space with a U(1) isometry, is the standard D2-brane in a type IIA supergravity background. In particular, the D2-brane action, complete with the Dirac-Born-Infeld term, arises from the gauged Wess-Zumino worldvolume 4-form via the brane action principle. The discussion is extended to the massive D2-brane considered as a gauged supermembrane in a massive D=11 superspace background. Type IIA supergeometry is derived using Kaluza-Klein techniques in superspace.
description: Latex, 46 pages, clarifying remarks and references added
Late-time evolution of charged massive Dirac fields in the Reissner-Nordström black-hole background
Creators: name: Jing, Jiliang
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The late-time evolution of the charged massive Dirac fields in the background of a Reissner-Norström (RN) black hole is studied. It is found that the intermediate late-time behavior is dominated by an inverse power-law decaying tail without any oscillation in which the dumping exponent depends not only on the multiple number of the wave mode but also on the field parameters. It is also found that, at very late times, the oscillatory tail has the decay rate of $t^{-5/6}$ and the oscillation of the tail has the period $2π/μ$ which is modulated by two types of long-term phase shifts.
description: 11 pages, 5 figures
General Issues Connecting Flavor Symmetry and Supersymmetry
Creators: name: Bilgin, Ersen
name: Patt, Brian
name: Tucker-Smith, David
name: Wilczek, Frank
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We motivate and construct supersymmetric theories with continuous flavor symmetry, under which the electroweak Higgs doublets transform non-trivially. Flavor symmetry is spontaneously broken at a large mass scale in a sector of gauge-singlet fields; the light Higgs multiplets naturally emerge as special linear combinations that avoid acquiring the generic large mass. Couplings of the light Higgs doublets to light moduli fields from the singlet sector could lead to important effects in the phenomenology of the Higgs sector.
description: 5 pages
Farm Products Marketing Practices by Limited Resource Farmers
Creators: name: Tackie, Nii O.
name: Findlay, Henry J.
name: Baharanyi, Ntam
name: Tackie, Nii O.
name: Findlay, Henry J.
name: Baharanyi, Ntam
Publisher: name: Unknown
Year: 1998
Subjects: subject: Agribusiness
subject: Marketing
subject: FOS: Economics and business
subject: Farm marketing
subject: Limited resource farmers
subject: Marketing

description: This study explores the perceptions and practices of limited resource farmers in South Central Alabama regarding farm product marketing. The objectives are to identify the demographic characteristics of the farmers, assess their marketing characteristics and identify their marketing problems and marketing assistance needs. A two-page questionnaire was used to collect data from a random sample of 144 limited resource farmers using face-to-face interviewing procedures in spring to fall, 1996. The findings revealed most of the farmers believed they were not experiencing any marketing problems. Those that did believe they were experiencing marketing problems listed higher prices as their greatest concern. A majority (68%) earned $10,000 or less annually. The investigators concluded that an increase income and consequently enhance profitability of production. Further studies are suggested to look closely at other issues related to marketing, such as enterprise budgeting to discern profitable cropping alternatives for limited resource farmers.
The D0 Run II Trigger System
Creators: name: Schwienhorst, Reinhard
Publisher: name: arXiv
Year: 2004
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: I present the current status of the D0 trigger system in Run II at the Tevatron.
description: 3 pages, 2 figures, To appear in the proceedings of DPF 2004: Annual Meeting of the Division of Particles and Fields (DPF) of the American Physical Society (APS), Riverside, California, 26-31 Aug 2004
Ayoub rabhi Inclusion financière en Afrique .pdf
Creators: name: Rabhi, Ayoub
name: Haoudi, Amina
Publisher: name: figshare
Year: 2020
Subjects: subject: Economics
subject: 140302 Econometric and Statistical Methods
subject: FOS: Economics and business

description: Le terme «inclusion financière» implique l'accès et l'utilisation des services bancaires (compte courant, épargne, assurance, crédit, paiements, etc.) à un faible coût pour la population défavorisée et à faible revenu dans un pays. En fait, les services bancaires ont un caractère de bien public. Il est donc nécessaire que l'accessibilité et l'utilisation équitable des services bancaires par l'ensemble de la population doivent figurer parmi les objectifs primordiaux des politiques gouvernementales et des institutions financières. En effet, cela permet de répondre aux besoins financiers de base de la population dans un pays quelconque. L'objectif principal de notre étude est donc d'examiner les déterminants de la détention d’un compte courant qui est considéré comme étant une dimension basique d’utilisation des services bancaires et par conséquent de l'inclusion financière. Dans notre papier, nous adoptons une approche empirique en données transversales afin d’analyser les éléments qui conditionnent la détention d’un compte courant dans le continent africain.