cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quantum correlations and fluctuations in the pulsed light produced by a synchronously pumped optical parametric oscillator below its oscillation threshold
Creators: name: Averchenko, V. A.
name: Golubev, Yu. M.
name: Fabre, C.
name: Treps, N.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a simple quantum theory for the pulsed light generated by a synchronously pumped optical parametric oscillator (SPOPO) in the degenerate case where the signal and idler trains of pulses coincide, below threshold and neglecting all dispersion effects. Our main goal is to precise in the obtained quantum effects, which ones are identical to the c.w. case and which ones are specific to the SPOPO. We demonstrate in particular that the temporal correlations have interesting peculiarities: the quantum fluctuations at different times within the same pulse turn out to be totally not correlated, whereas they are correlated between nearby pulses at times that are placed in the same position relative to the centre of the pulses. The number of significantly correlated pulses is of the order of cavity finesse. We show also that there is perfect squeezing at noise frequencies multiple of the pulse repetition frequency when one approaches the threshold from below on the signal field quadrature measured by a balanced homodyne detection with a local oscillator of very short duration compared to the SPOPO pulse length.
description: 12 pages, 3 figures
Improving the ecological and economic performance of agri-environment schemes: Payment by modelled results versus payment for actions
Creators: name: Simpson, Katherine
name: Armsworth, Paul
name: Dallimer, Martin
name: Nthambi, Mary
name: De Vries, Frans
name: Hanley, Nick
Publisher: name: Unknown
Year: 2023
Subjects: Environmental Economics and Policy
Agricultural and Food Policy

description: Researchers and policy designers have become increasingly interested in re-designing agrienvironmental policy to improve both economic efficiency and ecological effectiveness. One idea within this debate has been payments for results (outcomes) rather than payment for actions. Payment for result policies have been argued to have some important advantages, but two key disadvantages are the higher risks faced by land owners, leading to low participation rates; and the potentially high costs of monitoring outcomes. Bartkowski et al (2021) propose an alternative policy design of payment for modelled results, which claims to avoid these two problems. Our paper provides the first empirical test of the economic and ecological consequences of applying such a payment for modelled results policy to farmland biodiversity in England. We compare payment for modelled results findings with approximately equivalent payment for actions schemes designed to deliver increases in the same biodiversity indicators. Key insights from the work are that payment for modelled results delivers superior ecological outcomes for the same budgetary cost as payment for actions, whilst economic surpluses to farmers are also higher.
Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
Creators: name: Unkn
Publisher: name: unkn
Year: 2018

description: Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
description: Bd. 53, Abth. 1 = N.F. Bd. 46, Abth. 1 (1857)
Better together? The effect of VietGAP and PGS certification on farmers' welfare in Vietnam
Creators: name: Enthoven, Laura
Publisher: name: Unknown
Year: 2023
Subjects: subject: Research Methods/ Statistical Methods
subject: International Development
subject: local value chains
subject: certification
subject: farmers' welfare
subject: panel data
subject: Vietnam

description: To promote sustainable agriculture in low- and middle-income countries, local certification schemes, including participatory guarantee systems (PGS) have been promoted as inclusive mechanisms. In this study, we investigate the implications of two local certification schemes for farmers in Vietnam: VietGAP, a simplified version of GlobalGAP certified by a third-party body, and PGS, based on sustainable agricultural practices controlled internally by farmers and other local stakeholders. We use farm-household data from a two-round panel survey conducted in 2018 and 2022 among 301 vegetable farmers. First, we investigate factors that may affect farmers’ adoption of the two schemes. Second, we estimate correlated random effects models to evaluate the schemes’ effect on farmers’ welfare while accounting for unobserved timeconstant factors. We do not find significant evidence that either certification scheme has an effect on household revenues and income from vegetables. However, we report negative costs and price effects, but positive market access effects linked to certification.
Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
Creators: name: Unkn
Publisher: name: unkn
Year: 2018

description: Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
description: Bd. 94 = N.F. Bd. 87 (1899)
Boundary correlation functions of the six and nineteen vertex models with domain wall boundary conditions
Creators: name: Motegi, Kohei
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Correlation functions of the six and nineteen vertex models on an N \times N lattice with domain wall boundary conditions are studied. The general expression of the boundary correlation functions is obtained for the six vertex model by use of the quantum inverse scattering method. The correlation functions which are not "boundary" can be expressed as a linear sum of the boundary correlation functions. For the nineteen vertex model, the boundary correlation functions are shown to be expressed in terms of those for the six vertex model.
description: 14 pages, 2 figures, to appear in Physica A
Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
Creators: name: Unkn
Publisher: name: unkn
Year: 2018

description: Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
description: Bd. 1, Abth. 1 (1820)
Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
Creators: name: Unkn
Publisher: name: unkn
Year: 2018

description: Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
description: Bd. 54, Abth. 1 = N.F. Bd. 47, Abth. 1 (1858)
A typology of Malian farmers and their credit repayment performance - An unsupervised machine learning approach
Creators: name: Olkers, Tim
name: Liu, Shuang
name: Mußhoff, Oliver
Publisher: name: Unknown
Year: 2023
Subjects: subject: Agricultural Finance
subject: Agricultural and Food Policy
subject: agricultural credit
subject: agricultural policy
subject: loan demand
subject: Mali
subject: machine learning
subject: farmer typology

description: The availability of formal credit is crucial for the development of the agricultural sector as it can enhance farmers’ purchasing power to acquire inputs and agricultural technology. This, in turn, can increase productivity and resilience throughout the sector. Therefore, the analysis of bank client and loan data in the agricultural sector in a developing country is of interest. We explore the question of who the clients of agricultural credit are and whether they can be clustered into different groups by using an unsupervised machine learning technique. We also investigate whether the loan repayment performance of these clusters differs based on various logit regressions. According to our results, there are 3 different clusters of farmers in Mali that differ by personal characteristics (such as age or gender) as well as credit demand characteristics (e.g., loan amount, interest rates, credit duration, number of credits). Each cluster that differs in their characteristics demonstrates a dissimilar repayment performance. Hence, different instruments as well as communication designs are needed to meet the financial needs of the different clusters and to strengthen the resilience of different groups of farmers in Mali. Our findings provide an important foundation for the design of future agricultural policies and financial products for the agricultural sector as they emphasise the heterogeneity of agricultural lenders in general.
Recent Federal Income Tax Changes Affecting Farmer Cooperatives
Creators: name: Waas, George J.
name: Waas, George J.
Publisher: name: Unknown
Year: 1954
Subjects: Agribusiness
Agricultural and Food Policy
Financial Economics

description: Excerpts from the report: Supplement No. 1 to Farm Credit Administration Miscellaneous Report 156, Recent Federal Income Tax Changes Affecting Cooperatives, (Revised June 4, 1952) reported an amendment to Income Tax Regulations 111 by the Commissioner of Internal Revenue. This covered the reporting of certain patronage dividends to the Commissioner annually on Information Returns (Internal Revenue Forms 1096 and 1099). Affected by that amendment were all kinds of cooperatives, including farmers' associations which are exempt from Federal income taxation, as well as those not so exempt (but excluding rural electrification cooperatives and certain mutual insurance companies). This report which in effect is a revision of Supplement No. 2 to Miscellaneous Report 156 covers the Commissioner of Internal Revenue's amendment to Regulations 111 concerning administrative details of the income tax treatment of exempt cooperatives, and of the patrons of all farmers' marketing and purchasing cooperatives.
Modelling the economic performance of Recirculating Aquaculture Systems (RAS) at the farm level
Creators: name: Campos-González, Jorge
name: Gadanakis, Yiorgos
name: Mancini, Mattia
name: Bateman, Ian
Publisher: name: Unknown
Year: 2023
Subjects: subject: Environmental Economics and Policy
subject: Production Economics
subject: farm profitability
subject: diversification
subject: sustainability
subject: land use
subject: net margin

description: Agricultural production practices are one of the most significant drivers of biodiversity loss and make farming a major contributor to greenhouse gas (GHG) emissions and water pollution. Currently, agricultural policies and farm management interventions at a farm level are designed to contribute to a transformational reform of agricultural systems to improve environmental and economic sustainability. The new Agriculture Act for the UK commits to net zero carbon emissions and policies to enhance environmental stewardship and sustainability and support the production of public goods. Introducing recirculating aquaculture systems (RAS) with farm-based renewable energy (Anaerobic Digestors, AD) provides a novel diversified enterprise for farming systems with considerable but poorly understood economic and environmental benefits. This study conducts farm-based Net Margin analysis to show that an AD unit generating up to 500 kW combined with six to 12 RAS 157 m3 units for high-value shrimp ("king prawn") production is economically viable on medium and large arable farms in the East of England at 2022 prices. Besides, we explore further key issues such as impacts on other farm activities, land use due to AD feedstock choices, use of digestate and nutrients cycling, among others.
The Effects of Rising Prices on Corn Production in Western African Countries
Creators: name: Rogna, Marco
Publisher: name: Unknown
Year: 2023
Subjects: subject: Food Security and Poverty
subject: Crop Production/Industries
subject: crop models
subject: food security
subject: maize yields
subject: Western Africa
subject: yields forecast

description: The intensification of the Russo–Ukrainian war started in February 2022 with the Russian invasion of Ukraine has generated a dramatic increase in the price of several goods. In particular, energy, gas and oil have been the most interested by this spike in prices, followed by several agricultural commodities. Fertilizers, whose production is energy intensive and/or directly dependent from oil derivatives, have also experienced a sharp increase in prices. This has risen concerns for food insecure countries, particularly in Africa, since, besides a lower possibility to purchase food commodities on the international market, they will likely decrease their own production due to a lower utilization of fertilizers. Quantifying this potential decrease in agricultural production is important in order to fully assess their vulnerability in terms of food security. The present paper tries to accomplish this task by forecasting the change in maize production in 2022 and 2023 compared to 2021 in seven Western African countries. We find an overall decline in maize production of 10% circa in both years with a strong heterogeneity among countries. Trivial users of fertilizers, such as Niger, experience a very modest decline in production (less than 2%) whereas others, such as Benin and Togo, have a double digit decline: approximately 13% the former and 32% the latter.
The Impact of Chinese Rice Support Policies on Rice Acreages
Creators: name: Jin, Yan
name: Gardebroek, Cornelis
name: Heerink, Nico
Publisher: name: Unknown
Year: 2023
Subjects: subject: Agricultural and Food Policy
subject: Food Security and Poverty
subject: rice acreages
subject: policy intervention
subject: impact assessment
subject: China
subject: panel data

description: Declining arable land and yield stagnation challenge food security in China. Since 2004, the Chinese government has introduced a bundle of subsidies and income support measures to stimulate production and increase national food security, including a minimum procurement price in the main rice-cultivating regions. Rice acreages have increased since 2004, but this could also be due to rising rice price levels nationally and globally. This raises the question whether the rice support policies were effective. Using a natural experiment created by the minimum procurement price policy being introduced in selected regions, we use a dynamic fixed effects model to perform a difference-in-differences analysis on the effectiveness of these rice support policies. We find that indica rice acreages respond to changes in the rice prices, and, controlling for rice prices, that China’s rice support policies were effective in increasing rice acreages of both early and late indica between 2004 and 2017.
Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
Creators: name: Unkn
Publisher: name: unkn
Year: 2018

description: Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
description: Bd. 65, Abth. 1 = N.F. Bd. 58, Abth. 1 (1874)
Offsetting, contagion, and neutralization : the effects of “thick reinforcement” in the Six-party Talks
Creators: name: Golobokov, Andrei
Publisher: name: University of British Columbia
Year: 2021

description: This paper addresses gaps in the existing literature on competition and accommodation dynamics among great and middle powers within multilateral security institutions, such as Six-Party Talks. The thesis asks why such security institutions show so much variation in outcomes, despite similar long-term power dynamics. For example, what explains the fluctuations in the performance of the 6-party talks over two decades: why were the 6-party talks initially successful, before experiencing stalemate, and, eventually collapse? In response, this paper conducts a plausibility probe in the case of Six-Party Talks. Most existing studies focus on the behavior of North Korea, the US, and China through a power lens. In contrast, I argue that a high degree of cooperation at the bilateral level among the majority of participants is a determining factor for the success of the talks. In particular, strong reciprocal engagements, or “thick reinforcement” resulted in clear unity among participating states and decisive collective action. When such conditions existed, we observe an uptick in the performance of Six-Party talks; and success in softening the hard stance of North Korea. The paper finds that different combinations of thick reinforcement and weak engagement across dyads cause different effects. A simple ‘contagion effect’ was sufficient for the success of the talks in 2007. Low levels of cooperation across dyads led to ‘offsetting’ and ‘neutralization’ effects, which then led to stagnation of the talks in 2003 – 2004 and to their collapse in 2008 – 2009.
Gendered Effects of Crop Diversification and Climate Shocks on Household Food Security Status in Nigeria
Creators: name: Amolegbe, Khadijat Busola
name: Fontep, Eugenie Rose
name: Ahodode, Bernadin Géraud Comlan
name: Pagal, Emmanuelle Dorcas Mbanga
name: Ardelkrim, Araar
Publisher: name: Unknown
Year: 2023
Subjects: subject: Food Security and Poverty
subject: Environmental Economics and Policy
subject: climate change
subject: gender
subject: diversification
subject: food security
subject: Nigeria

description: This paper studies the impact of climate shocks and crop diversification on household food security in Nigeria by focusing on gender-disaggregated effects. We combine historical rainfall and temperature datasets with the World Bank’s Living Standards Measurement Study - Integrated Surveys on Agriculture (LSMS-ISA) for Nigeria. Furthermore, we use an adapted version of the crop diversification Weighted Shannon index (WSI) to measure crop diversification. The food security indicators adopted are the Household Dietary Diversity Score (HDDS), the reduced Coping Strategy Index (rCSI), and the per capita food expenditures. We use a set of panel and dynamic panel models for our analysis, and our results show that climate shocks have negative effects on food security, especially in households with men plot managers. However, we find that crop diversification is positively linked to food security. Our results show the need to target policies to encourage crop diversification in households and promote crop diversification components in women empowerment programs.
Estimation of nitrous oxide (N2O) emissions from agriultural soil management at higher resolution and implications for defining the cost of carbon at farm level
Creators: name: Francisco-Cruz, Carlos Alberto
name: Buckley, Cathal
name: Breen, James
name: Lanigan, Gary
Publisher: name: Unknown
Year: 2023
Subjects: subject: Environmental Economics and Policy
subject: Land Economics/Use
subject: nitrous oxide
subject: environmental factors
subject: carbon cost

description: This paper aims to define a high-resolution model to estimate nitrous oxide (N2O) emissions from the application of fertilisers to agricultural soils across the Republic of Ireland and to assess the implications for this approach on the assessment and mitigation of greenhouse gases (GHG) emissions. N2O emissions from the management of agricultural soils represented 10% of the total national GHG emissions in 2020. The high-resolution model proposed here modifies the current methodology based on the Guidelines for National Greenhouse Gas Inventories (IPCC, 2006) by adding soil characteristics and climate (environmental factors). To apply the high-resolution model, we use farm level microdata from the Teagasc National Farm Survey (NFS) and high-resolution spatial climate-based data over the 2014 to 2020 period. Results from the high-resolution model indicates a reduction of 3% in N2O emissions compared to the baseline model (IPCC methodology). However, the difference in estimated N2O emissions on individual farms can range from -45% to +40%. The carbon cost estimated by taking the high-resolution model results ranges from 20 to 150 euros per hectare, depending on local environmental factors. The design of a high-resolution emissions estimation process allows analysis of different agricultural practices and can assist in targeting appropriate GHG based mitigation measures based on cost-effectiveness criteria.
Adoption of Multiple Soil Fertility Management Practices and Its Impact on Farm Performance in Rural China
Creators: name: Kang, Shijia
Publisher: name: Unknown
Year: 2023
Subjects: subject: Land Economics/Use
subject: Farm Management
subject: soil fertility management
subject: multivariate probit
subject: multinominal endogenous switching regression
subject: simultaneous adoption

description: The adoption of soil fertility management practices (SFMPs) has become an important issue in the development economies, especially as a way to tackle land degradation, erosion, and low agricultural productivity. This study analyses the factors that facilitate or impede the probability and extent of adoption of multiple SFMPs as well as the performance effects, using farm survey data of 773 vegetable producers in rural China. Multivariate and ordered probit models are applied to the modeling of adoption decisions by farm households facing multiple SFMPs, which can be adopted in various combinations. A multinominal endogenous switching regression model is used to investigate the impact of SFMP adoption on farm productivity. The results show that: (1) the adoption of straw returning and advanced irrigation have substitution effect, and subsoiling practice is significantly correlated to straw returning and soil testing; (2) both the probability and the extent of adoption of SFMPs are influenced by many factors: household’s education, cadre membership, cooperative and training participation, social capital and individual awareness; (3) farms’ productivity is increasing with the intensive adoption of SFMPs. These results imply that policymakers should seek to promote local institutions and training providers, increase household education and awareness, and strengthen social networks in order to improve the adoption of SFMPs.
Adoption and impact assessment of improved groundnut varieties on poverty using DNA-Fingerprinting data: Evidence frrom smallholder rural farmers in Northern Nigeria
Creators: name: Muricho, Geoffrey
name: Lokossou, Jourdain
name: Odhiambo, Collins
name: Ojiewo, Chris
Publisher: name: Unknown
Year: 2023
Subjects: subject: Food Security and Poverty
subject: Research and Development/Tech Change/Emerging Technologies
subject: groundnut
subject: variety adoption
subject: DNA fingerprinting
subject: poverty
subject: Nigeria

description: Poverty among rural farming households in sub-Saharan Africa (SSA) is associated with low adoption of modern farming technologies, especially improved crop varieties. Most studies that investigated adoption and impacts of improved crop varieties in SSA are based on farmers’ selfreported adoption status and average treatment effects. However, farmers self-reported adoption status is susceptible to errors and assessing adoption impacts using average treatment effects do not account for farmers’ heterogeneity. To address these challenges, we used DNA-fingerprinting data and Marginal Treatment Effect (MTE) framework to analyze adoption and impacts of adopting improved groundnut varieties (IGVs) in Northern Nigeria. DNA-fingerprinting results showed 57% adoption rate compared to 45% self-reported by farmers. About 29% of the sampled farmers made type I error (mistaking local varieties for improved varieties) while 44% made type II error (mistaking improved varieties for local varieties). Formal sources of seed information and empowering agricultural extension to reach more farmers was significant in ensuring accurate variety identification. Further, adopting IGV significantly reduced poverty gap and poverty severity, especially among households headed by females, older persons, lowly educated and those with limited access to credit. Therefore, policy options that enhance adoption of IGVs will significantly help in reducing poverty.
Assessing the (a)symmetric effect of global climate anomalies on food prices: Evidence from local prices
Creators: name: Emediegwu, Lotanna Ernest
Publisher: name: Unknown
Year: 2023
Subjects: subject: Demand and Price Analysis
subject: Research Methods/ Statistical Methods
subject: El Niño Southern Oscillation
subject: food prices
subject: multivariate ENSO
subject: time-varying smooth transition autoregressive model

description: This paper uses time-vary ing smooth transition autoregressive (TV-STAR) model to investigate the asymmetric nature of ENSO (an exogenous climatic factor) with respect to the non-linear dynamics of food prices in sub-Saharan Africa (SSA). Curating food price series from more than 1100 markets from 36 SSA countries, the study finds that ENSO (linearly or nonlinearly) affects roughly half of food prices considered, with most nonlinear models exhibiting strong asymmetric properties with shock-inflicted persistence. Moreover, in terms of the location of the burden of ENSO impact, I find a geographical and food product divide. Specifically, ENSO appears to be more efficacious on maize prices in Southern, Eastern and some parts of Central Africa, while the effect is subdued in the Western African subregion. On the other hand, imported rice and processed foods such as bread appear to be the most affected, while local rice, cassava, millet and animal products like meat and milk are least affected. The policy implication of this dichotomy is that response to ENSO news should be subregion-specific rather than region-specific depending on how the subregions absorb the shock.
Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
Creators: name: Unkn
Publisher: name: unkn
Year: 2018

description: Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
description: Bd. 4, Abth. 1 (1823)
Estimating the “Market Value” of Milk Distributing Business
Creators: name: Hirsch, Donald E.
name: Hirsch, Donald E.
Publisher: name: Unknown
Year: 1954
Subjects: Agribusiness
Financial Economics
Research Methods/ Statistical Methods

description: Excerpts from the report: There is a definite trend toward fewer and larger milk distributing businesses in this country. While market supply areas continue to increase in size rather steadily, distribution areas are expanding rapidly. These developments have resulted in a tremendous change in the marketing environments of most milk distributing organizations. Some rather inefficient concerns, able to operate successfully in the past, must now either increase efficiency, effect major operating changes, or go out of business. An ever-increasing number of small organizations are discontinuing their bottling operations to specialize in the distribution of products packaged by large businesses. These in turn may serve specialized distributing concerns in cities other than the city where its processing plant is located. The managements of many existing cooperative and noncooperative organizations soon will need to decide whether to purchase other milk distributing businesses or to sell their own. It is the purpose of this report to assist the managements of farmers' cooperatives to make such decisions wisely. While the report emphasizes market values of milk distributing businesses, much of its information is also adaptable to dairy manufacturing enterprises. Furthermore, much of the discussion here will be useful to managements of all small dairy businesses -- non-cooperative organizations as well as cooperatives.
Implementazione del TETRIS su piattaforma FPGA
Creators: name: Salvatore, Diana
Publisher: name: Scuola Universitaria della Svizzera Italiana (SUPSI)
Year: 2022

description: l Tetris è un videogioco di logica e ragionamento. Non essendo stato brevettato, il gioco e molte sue varianti sono diventati disponibili praticamente per qualunque dispositivo. La maggior parte delle moderne implementazioni di Tetris si basano su una CPU per realizzare la complessità del gioco. Tuttavia, le implementazioni basate su CPU soffrono di due principali difetti: 1)la latenza per rapporto alla reazione ai controlli di gioco, 2)a contesa delle risorse Lo scopo di questo lavoro è realizzare una versione del gioco di Tetris, basandosi sulla piat- taforma di valutazione per FPGA, facendo in modo di bilanciare in modo ottimale l’impiego di un softcore e l’implementazione di funzione HW. Lo sviluppo del progetto parte dallo studio della scheda di valutazione FPGA e delle risorse disponibili che presenta per implementare il progetto. A seguito di un design teorico del sistema delineando i blocchi funzionali principali come CPU e periferiche, l’attenzione principale si è concentrata su come sviluppare dell’hw dedicato solamente alla trasmissione dell’immagine su monitor. Il blocco funzionale che se ne occupa è il framebuffer. Il framebuffer è una memoria buffer nella quale vengono memorizzate le informazioni destinate all’output per la rappresentazione di un intero fotogrmma sullo schermo. Questo blocco funzionale è stato descritto in linguaggio VHDL e la correttezza è verificata dalle simulazioni su tool di sviluppo ModelSim. Definiti tutti i blocchi funzionali necessari e sintetizzati su hardware, il software implementato si occupa della dinamica di gioco TETRIS e dell’esecuzione di funzioni che disegnano lo schermo. Queste funzioni si basano sull’hardware sviluppato (framebuffer). Il sistema proposto presenta un joystick che si interfaccia con la scheda di valutazione che permette di collegarsi a un qualsiasi schermo HDMI con risoluzione 640x480. Il risultato è una versione del gioco funzionante di Tetris utilizzando una piattaforma di valutazione per FPGA. Per sviluppi futuri si potrebbe andare a migliorare il blocco funzionale framebuffer per permettere la gestione di più livelli dello schermo. Questo sarebbe possibile aumentando le risorse di memoria e la logica che si occupa della lettura dell’immagine associandola al livello dello schermo.
Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
Creators: name: Unkn
Publisher: name: unkn
Year: 2018

description: Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
description: Bd. 69, Abth. 1 = N.F. Bd. 62, Abth. 1 (1878)
Nucleon strangeness form factors and moments of PDF
Creators: name: Doi, Takumi
name: Deka, Mridupawan
name: Dong, Shao-Jing
name: Draper, Terrence
name: Liu, Keh-Fei
name: Mankame, Devdatta
name: Mathur, Nilmani
name: Streuer, Thomas
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The calculation of the nucleon strangeness form factors from N_f=2+1 clover fermion lattice QCD is presented. Disconnected insertions are evaluated using the Z(4) stochastic method, along with unbiased subtractions from the hopping parameter expansion. We find that increasing the number of nucleon sources for each configuration improves the signal significantly. We obtain G_M^s(0) = -0.017(25)(07), which is consistent with experimental values, and has an order of magnitude smaller error. Preliminary results for the strangeness contribution to the second moment of the parton distribution function are also presented.
description: Talk given at 12th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU 2010), Williamsburg, Virginia, USA, 31 May - 4 Jun 2010, 4 pages, 3 figures
Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
Creators: name: Unkn
Publisher: name: unkn
Year: 2018

description: Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
description: Bd. 5, Abth. 1 (1824)
Network resilience and risk attitudes: Evidence from Vietnamese Vegetable Farming
Creators: name: Luong, Tuan
Publisher: name: Unknown
Year: 2023
Subjects: subject: Risk and Uncertainty
subject: International Relations/Trade
subject: network resilience
subject: risk preferences
subject: risk aversion
subject: procrastination
subject: trading network
subject: intermediary traders
subject: vegetable farming

description: We explore the relationship between risk aversion, loss aversion, and procrastination and the resilience of trading networks in small scale rural farming in Vietnam. Rural farmers are highly dependent on intermediary traders to bring products to market. We survey farming households in three villages to obtain data on the trading network. We find that each village has a very distinctive trading network but none of them are resilient, with the typical farmer relying on one or two traders with whom they have traded for many years. In one village, with the most resilient network, we find evidence that risk aversion and loss aversion is associated with a household engaging with, respectively, more and less traders. In a separate village, the one with the fewest number of traders, we find a positive relationship between procrastination and the number of trading links.
Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
Creators: name: Unkn
Publisher: name: unkn
Year: 2018

description: Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
description: Bd. 24, Abth. 2 = N.F. Bd. 17, Abth. 2 (1836)
German farmers' perceived usefulness of satellite-based index insurance - Insights from a transtheoretical model
Creators: name: Nordmeyer, Eike Florenz
Publisher: name: Unknown
Year: 2023
Subjects: Risk and Uncertainty
Research and Development/Tech Change/Emerging Technologies

description: Index insurance is a promising tool to mitigate drought-related income losses in agriculture. Yet, the basis risk of index insurance based on meteorological observations inhibits farmers’ demand. To reduce the basis risk, the integration of satellite data has received research attention. However, farmers’ perceptions of satellite-based index insurance remain unknown. To derive initial insights into German farmers’ perceived usefulness (PU) of satellite-based index insurance, we surveyed 127 German farmers in a risk management context and applied a modified transtheoretical model of behavioral change (TTMC). This revealed detailed information on German farmers’ PU of satellite-based index insurance and its influencing factors. The results indicate that the average farmer perceives satellite-based index insurance as useful. Particularly, a higher educational level in the agricultural context as well as higher trust in index insurance products increases farmers’ PU. Moreover, higher relative climate-related income losses increase farmers’ PU. The results are of importance to insurers interested in the drivers of farmers’ PU of upcoming satellite-based index insurance and offers a starting point for researchers focusing on acceptance of index insurance and satellite data as well as for further applications of the TTMU.
Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
Creators: name: Unkn
Publisher: name: unkn
Year: 2018

description: Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
description: Bd. 70, Abth. 2 = N.F. Bd. 63, Abth. 2 (1879)
Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
Creators: name: Unkn
Publisher: name: unkn
Year: 2018

description: Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
description: Bd. 72 = N.F. Bd. 65 (1882)
Technical Efficiency in Organic and Conventional Wheat Farms: Evidence from a Primary Survey from Two Districts of Ganga River Basin, India
Creators: name: Singh, S.P.
name: Sajwan, Priya
name: Sajwan, Komal
Publisher: name: Unknown
Year: 2023
Subjects: subject: Productivity Analysis
subject: Farm Management
subject: organic
subject: conventional
subject: technical efficiency
subject: determinants
subject: DEA
subject: tobit regression

description: This paper analyses the technical efficiency of wheat farms operating under organic and conventional farming systems. The study is based on a primary survey of 579 farms (294 organic and 285 conventional) conducted in 2021 in two districts located in the Middle Ganga River Basin, India. Technical, managerial, and scale efficiencies of individual farms are estimated by applying Data Envelopment Analysis (DEA). The per hectare value of wheat production is taken as an output variable, and values of seeds, human labour, machine cost, plant nutrients, farm yard manure (FYM), plant protection, and irrigation charges are considered input variables for estimating the farm-level efficiencies. The post-DEA analysis is conducted using the Tobit regression to determine the efficiency factors. The results show that technical efficiency is significantly higher in conventional than organic farming systems due to a higher gap in scale efficiency than managerial efficiency. Further, 9.8% of conventional and only 1.0% of organic farms operate at the Most Productive Scale Size (MPSS), and 99% of organic and 81% of conventional farms at IRS. Organic farms perform well in managerial efficiency, but their technical efficiency is lower than conventional farms, mainly due to their relatively lower scale size. The paper suggests that technical efficiency in organic wheat farms can be increased by upscaling the farm size by incentivizing group/collective farming in clusters.
Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
Creators: name: Unkn
Publisher: name: unkn
Year: 2018

description: Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
description: Bd. 51, Abth. 2 = N.F. Bd. 44, Abth. 2 (1855)
Enhanced spin transfer torque effect for transverse domain walls in cylindrical nanowires
Creators: name: Franchin, Matteo
name: Knittel, Andreas
name: Albert, Maximilian
name: Chernyshenko, Dmitri
name: Fischbacher, Thomas
name: Prabhakar, Anil
name: Fangohr, Hans
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Recent studies have predicted extraordinary properties for transverse domain walls in cylindrical nanowires: zero depinning current, the absence of the Walker breakdown, and applications as domain wall oscillators. In order to reliably control the domain wall motion, it is important to understand how they interact with energy barriers. In this paper, we study the motion and depinning of transverse domain walls through potential barriers in ferromagnetic cylindrical nanowires. We use magnetic fields and spin-polarized currents to drive the domain walls along the wire. Using magnetic fields, we find that the minimum and the maximum fields required to push the domain wall through the barrier differ by 30 %. On the contrary, using spin-polarized currents, we find variations of a factor 130 between the minimum value of the depinning current density and the maximum value. We study the depinning current density as a function of the height of the energy barrier using numerical and analytical methods. We find that, for a barrier of 40 k_B T, a depinning current density of about 5 uA is sufficient to depin the domain wall. We reveal and explain the mechanism that leads to these unusually low depinning currents. One requirement for this new depinning mechanism is for the domain wall to be able to rotate around its own axis. With the right barrier design, the spin torque transfer term is acting exactly against the damping in the micromagnetic system, and thus the low current density is sufficient to accumulate enough energy quickly. These key insights may be crucial in furthering the development of novel memory technologies, such as the racetrack memory, that can be controlled through low current densities.
description: 9 pages, 10 figures
Trade-offs between international migration and agricultural commercialization: evidence frrom Kyrgyzstan
Creators: name: Kimsanova, Barchynai
name: Sanaev, Golib
name: Herzfeld, Thomas
Publisher: name: Unknown
Year: 2023
Subjects: subject: Agribusiness
subject: International Development
subject: migration
subject: remittances
subject: agricultural commercialization
subject: Kyrgyzstan

description: This paper analyzes the relationship between international migration, labor, remittances, and agricultural commercialization in Kyrgyzstan using nationally representative household panel surveys covering eight years from 2013 to 2020. Unlike other studies, we focus on evaluating the impact of international migration on total farm commercialization, including crop, livestock, and live animals. We use quantile regression via moments and a three-stage least squares method to overcome the potential endogeneity of migration, labor, and remittances. Overall results show that sending household members abroad has a significant labor-loss effect on households with a consequent impact on farm commercialization. Remittances only partially compensate for losses for households with the lowest level of commercialization. Furthermore, the quantile regressions show little heterogeneity between the selected quantiles, except for the number of migrants, which is detrimental to the lowest level of commercialization
title: Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ° Ð²ÐµÐ±-ÑÐ°Ð¹ÑÐ° Ð´Ð»Ñ ÐºÐ¾Ð¼Ð¿Ð°Ð½Ð¸Ð¸ ÑÑÐµÑÑ ÑÑÐ»ÑÐ³
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 website for a company sphere of services
Creators: name: ÐÐ°Ð½ÑÑÐºÐ¸Ð½Ð°, ÐÐ»Ð¸Ð·Ð°Ð²ÐµÑÐ°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2020
Subjects: Ð»ÐµÐ½Ð´Ð¸Ð½Ð³
Ð´Ð¸Ð·Ð°Ð¹Ð½
ÑÐ°Ð·ÑÐ°Ð±Ð¾ÐºÑÐ°
Ð¼Ð°ÐºÐµÑ
ÐºÐ¾Ð¼Ð¿Ð°Ð½Ð¸Ñ
Ð°Ð½Ð°Ð»Ð¸Ð·
HTML
CSS
landing
design
development
model
company
analysis
html
css

description: Ð Ð¿ÑÐ¾ÑÐµÑÑÐµ ÑÐ°Ð±Ð¾ÑÑ Ð¸Ð·ÑÑÐ¸Ð»Ð° Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÑ Ð¸ÑÑÐ»ÐµÐ´ÑÐµÐ¼Ð¾Ð¹ ÐºÐ¾Ð¼Ð¿Ð°Ð½Ð¸Ð¸ Ð¸ Ð¿ÑÐ¾Ð°Ð½Ð°Ð»Ð¸Ð·Ð¸ÑÐ¾Ð²Ð°Ð»Ð° ÐµÐµ Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¾Ð½Ð½ÑÑ ÑÑÑÑÐºÑÑÑÑ, ÑÐ°ÑÑÐ¼Ð¾ÑÑÐµÐ»Ð° ÑÐµÐ¾ÑÐµÑÐ¸ÑÐµÑÐºÐ¸Ðµ Ð°ÑÐ¿ÐµÐºÑÑ Ð²Ð½ÐµÐ´ÑÐµÐ½Ð¸Ñ Ð²ÐµÐ±-ÑÐ°Ð¹ÑÐ°, Ð¾Ð±Ð¾ÑÐ½Ð¾Ð²Ð°Ð»Ð° Ð½ÐµÐ¾Ð±ÑÐ¾Ð´Ð¸Ð¼Ð¾ÑÑÑ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ¸ ÑÐ°Ð¹ÑÐ°, Ð¿ÑÐ¾Ð²ÐµÐ»Ð° Ð°Ð½Ð°Ð»Ð¸Ð· ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ ÑÐ°Ð±Ð¾ÑÑ ÑÐ¾Ð·Ð´Ð°Ð½Ð½Ð¾Ð³Ð¾ ÑÐ°Ð¹ÑÐ° Ð¸ Ð¾Ð±Ð¾ÑÐ½Ð¾Ð²Ð°Ð»Ð° ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ¾Ðµ Ð²Ð½ÐµÐ´ÑÐµÐ½Ð¸Ðµ ÑÐ°Ð¹ÑÐ°.
description: In the process, I studied the activities of the company under study and analyzed its organizational structure, examined the theoretical aspects of website implementation, substantiated the need for website development, conducted an analysis of the effectiveness of the created website and justified the economic implementation of the website.
Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
Creators: name: Unkn
Publisher: name: unkn
Year: 2018

description: Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
description: Bd. 9, Abth. 1 = N.F. Bd. 2, Abth. 1 (1827)
Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
Creators: name: Unkn
Publisher: name: unkn
Year: 2018

description: Archiv für das Zivil- und Kriminalrecht der Königlich-Preussischen Rheinprovinzen
description: Bd. 31, Abth. 1 = N.F. Bd. 24, Abth. 1 (1841)
title: ÐÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ñ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´ÑÑÐ²ÐµÐ½Ð½Ð¾-ÑÐ¾ÑÐ³Ð¾Ð²Ð¾Ð¹ Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸ Ð¼ÑÑÐ½Ð¾Ð³Ð¾ ÑÐµÑÑÐ¾ÑÐ°Ð½Ð° Ð½Ð° 100 Ð¼ÐµÑÑ Ð¿Ð¾ Ð°Ð´ÑÐµÑÑ: Ð³. Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³, ÑÐ». Ð Ð¾ÑÑÐ¾Ð²ÑÐºÐ°Ñ, Ð´. 19/3
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: Organization of production and trade activities of the meat restaurant for 100 seats at the address: St. Petersburg, street Rostovskay, d. 19/3
Creators: name: Ð¡Ð°Ð²ÑÐµÐ½ÐºÐ¾, Ð®ÑÐ¸Ð¹
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2019
Subjects: Ð¼ÑÑÐ½Ð¾Ð¹ ÑÐµÑÑÐ¾ÑÐ°Ð½
Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´ÑÑÐ²ÐµÐ½Ð½Ð¾-ÑÐ¾ÑÐ³Ð¾Ð²Ð°Ñ Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÑ
Ð¼ÐµÐ½Ñ
Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´ÑÑÐ²ÐµÐ½Ð½Ð°Ñ Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ð°
meat restaurant
production and trading activities
menu
production program

description: ÐÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ð¾ Ð¼Ð°ÑÐºÐµÑÐ¸Ð½Ð³Ð¾Ð²Ð¾Ðµ Ð¾Ð±Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð½ÐµÐ¾Ð±ÑÐ¾Ð´Ð¸Ð¼Ð¾ÑÑÐ¸ Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸ Ð¼ÑÑÐ½Ð¾Ð³Ð¾ ÑÐµÑÑÐ¾ÑÐ°Ð½Ð° Ð½Ð° 100 Ð¼ÐµÑÑ Ð¿Ð¾ Ð°Ð´ÑÐµÑÑ: Ð³. Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³, ÑÐ». Ð Ð¾ÑÑÐ¾Ð²ÑÐºÐ°Ñ, Ð´. 19/3, ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ð¹ Ð¿ÑÐ¾Ð³ÑÐµÑÑ, Ð¿ÑÐ¾Ð¸Ð·Ð²ÐµÐ´ÐµÐ½Ñ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ðµ ÑÐ°ÑÑÐµÑÑ Ð¾Ð±Ð¾ÑÑÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ, Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð° Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÑÑÑÐºÑÑÑÐ° Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ. Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ñ Ð¼ÐµÑÐ¾Ð¿ÑÐ¸ÑÑÐ¸Ñ Ð¿Ð¾ Ð¾Ð±ÐµÑÐ¿ÐµÑÐµÐ½Ð¸Ñ Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸ Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸ Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÑÐµÐ¼Ð¾Ð³Ð¾ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ, ÐµÐ³Ð¾ Ð¿Ð»Ð°Ð½Ð¸ÑÐ¾Ð²Ð¾ÑÐ½Ð¾Ðµ ÑÐµÑÐµÐ½Ð¸Ðµ Ð¸ Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ñ Ð¾ÑÐ½Ð¾Ð²Ð½ÑÐµ ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ¸Ðµ Ð¿Ð¾ÐºÐ°Ð·Ð°ÑÐµÐ»Ð¸.
description: Implementation of a marketing study of the need to design the activities of a meat restaurant for 100 places at the address: St. Petersburg, st. Rostov, 19/3, developed technological progress, made technological calculations of equipment, determined the organizational structure of the enterprise. Project solution and the provision of basic economic indicators.
Rurality Forcing the Lights On: Is This Worth It?
Creators: name: Ajibade, Toyin B.
name: Ajibade, Ezekiel T.
name: Muhammad-Lawal, Abdulazeez
name: Oloyede, Waliyat O.
Publisher: name: Unknown
Year: 2023
Subjects: subject: Research and Development/Tech Change/Emerging Technologies
subject: Resource /Energy Economics and Policy
subject: adoption
subject: electricity
subject: probit regression
subject: solar energy
subject: personal wellbeing

description: Energy shortage is a major concern in Nigeria. Albeit its abundance, fossil fuel is no viable solution considering varied pollution. Renewable energy technology like solar-powered-hubfor-homes is gaining prominence. The technology positions to address energy deficit in rural households but first, household decision makers’ question of whether such investment is worth its cost demands answers. We assessed impact of this technology on wellbeing of adopting rural farming households in Nigeria and explored the drivers of its diffusion. Designing a Quasi-experiment, we randomly assigned 73 subscribers into treatment group and 219 nonelectrified households into control group. Data were analysed using descriptive statistics, t-test, PSM, and probit regression. We found adoption increased wellbeing of adopters over nonadopters(p<0.05) confirming our hypothesis that access to stand-alone solar-powered energy by off-grid rural households can potentially improve adopter’s personal wellbeing. We found that household and remittance incomes, within-household school-aged children, payment flexibility, subsidy scheme, peer effect and pursuit of life’s ease increased the probability of the technology adoption whereas increase in age, proximity to town and fossil fuel access negatively influenced its adoption (p<0.05). We recommended government subsidy on the technology. Diffusion may be aided by peer effect hence the recommendation to influence key individuals to adopt.
Phase-Field Reaction-Pathway Kinetics of Martensitic Transformations in a Model Fe3Ni Alloy
Creators: name: Denoual, Christophe
name: Caucci, Anna Maria
name: Soulard, Laurent
name: Pellegrini, Yves-Patrick
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A three-dimensional phase-field approach to martensitic transformations that uses reaction pathways in place of a Landau potential is introduced and applied to a model of Fe3Ni. Pathway branching involves an unbounded set of variants through duplication and rotations by the rotation point groups of the austenite and martensite phases. Path properties, including potential energy and elastic tensors, are calibrated by molecular statics. Acoustic waves are dealt with via a splitting technique between elastic and dissipative behaviors in a large-deformation framework. The sole free parameter of the model is the damping coefficient associated to transformations, tuned by comparisons with molecular dynamics simulations. Good quantitative agreement is then obtained between both methods.
description: 4 pages, 3 figures