cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Assessment of Causes of Employee Turnover and Intention to Leave in Nib International Bank
Creators: name: Yeyesuswork, Esayas
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: The banking industry is exhibiting a notable increase since the sector has been open for private investment some twenty years ago. There is also a continuous branch expansion in the sector which resulted in a growing demand for skilled staff. Staff turnover has been a challenge to the banking sector in general and it is not different in the case of Nib International Bank as well. The current level of turnover in NIB is around 10% while the management has planned to bring it down to 3%. The major challenge of NIB is particularly the turnover of the technical staff. The main objective of this study is to assess the causes of turnover and intention to leave. The study was conducted using both primary and secondary sources of information. The primary data was generated though questionnaire and interview. The study was conducted using both quantitative and qualitative analysis method and is mainly descriptive. Frequency tables, mean and percentage were used to explain some of the factors. T-test and one way ANOVA was also used whenever appropriate. The study revealed that salary, benefits, position change and title change are the main causes of turnover and intention to leave. It also shows that there is a strong level of intention to leave that does not differ between gender, age, job position and years of service. A consistent application of HR policies and procedures particularly in promotion found to be a concern for employees. Factors that are contributing to the intention to leave are found to be mostly internal. The study recommends that NIB should conduct a comprehensive salary and benefit survey to position itself among the best employers in the industry. It should also address the concerns of employees in terms of application of HR policies and procedures in order to curb the situation and persuade employees to change their intention. Key words: Turnover; Intention to leave, HR policies and procedures
title: Interaction Tree Specifications: A Framework for Specifying Recursive, Effectful Computations That Supports Auto-Active Verification (Artifact)
Creators: name: Silver, Lucas
name: Westbrook, Eddy
name: Yacavone, Matthew
name: Scott, Ryan
Publisher: name: Schloss Dagstuhl - Leibniz-Zentrum für Informatik
Year: 2023
Subjects: subject: coinduction
subject: specification
subject: verification
subject: monads
subject: Theory of computation → Denotational semantics
subject: Theory of computation → Programming logic
subject: Theory of computation → Separation logic

description: This paper presents a specification framework for monadic, recursive, interactive programs that supports auto-active verification, an approach that combines user-provided guidance with automatic verification techniques. This verification tool is designed to have the flexibility of a manual approach to verification along with the usability benefits of automatic approaches. We accomplish this by augmenting Interaction Trees, a Coq datastructure for representing effectful computations, with logical quantifier events. We show that this yields a language of specifications that are easy to understand, automatable, and are powerful enough to handle properties that involve non-termination. Our framework is implemented as a library in Coq. We demonstrate the effectiveness of this framework by verifying real, low-level code.
description: DARTS, Vol. 9, Special Issue of the 37th European Conference on Object-Oriented Programming (ECOOP 2023), pages 8:1-8:2
Bounds on the Number of Measurements for Reliable Compressive Classification
Creators: name: Reboredo, Hugo
name: Renna, Francesco
name: Calderbank, Robert
name: Rodrigues, Miguel R. D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: This paper studies the classification of high-dimensional Gaussian signals from low-dimensional noisy, linear measurements. In particular, it provides upper bounds (sufficient conditions) on the number of measurements required to drive the probability of misclassification to zero in the low-noise regime, both for random measurements and designed ones. Such bounds reveal two important operational regimes that are a function of the characteristics of the source: i) when the number of classes is less than or equal to the dimension of the space spanned by signals in each class, reliable classification is possible in the low-noise regime by using a one-vs-all measurement design; ii) when the dimension of the spaces spanned by signals in each class is lower than the number of classes, reliable classification is guaranteed in the low-noise regime by using a simple random measurement design. Simulation results both with synthetic and real data show that our analysis is sharp, in the sense that it is able to gauge the number of measurements required to drive the misclassification probability to zero in the low-noise regime.
description: 16 pages, 5 figures, 4 tables. Submitted to the IEEE Transactions on Signal Processing
title: Designing Asynchronous Multiparty Protocols with Crash-Stop Failures (Artifact)
Creators: name: Barwell, Adam D.
name: Hou, Ping
name: Yoshida, Nobuko
name: Zhou, Fangyi
Publisher: name: Schloss Dagstuhl - Leibniz-Zentrum für Informatik
Year: 2023
Subjects: subject: Session Types
subject: Concurrency
subject: Failure Handling
subject: Code Generation
subject: Scala
subject: Software and its engineering → Source code generation
subject: Software and its engineering → Concurrent programming languages
subject: Theory of computation → Process calculi
subject: Theory of computation → Distributed computing models

description: We introduce Teatrino, a toolchain that supports handling multiparty protocols with crash-stop failures and crash-handling behaviours. Teatrino accompanies the novel MPST theory in the related article, and enables users to generate fault-tolerant protocol-conforming Scala code from Scribble protocols. Local types are projected from the global protocol, enabling correctness-by-construction, and are expressed directly as Scala types via the Effpi concurrency library. Teatrino extends both Scribble and Effpi with support for crash-stop behaviour. The generated Scala code is executable and can be further integrated with existing systems. The accompanying theory in the related article guarantees deadlock-freedom and liveness properties for failure handling protocols and their implementation. This artifact includes examples, extended from both session type and distributed systems literature, featured in the related article.
description: DARTS, Vol. 9, Special Issue of the 37th European Conference on Object-Oriented Programming (ECOOP 2023), pages 9:1-9:3
Investigation on the Effect of Supply Chain Integration on Ethiopian Garment Industry"s Performance
Creators: name: Samuel, Salem
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2012

description: This thesis paper makes an investigation on the effect of supply chain integration (Supply, internal, and customer integration) on Ethiopian garment industry's performance with regard to product quality and competitive advantage. The main objective of this paper is to explore the effect of supply chain integration on Ethiopian garment industry's performance and provide a recommendation in order to improve the product quality and competitive position performance of the sector. The study discusses different concepts on supply chain integration, product quality, and competitive advantage. In order to undertake this research, a sample size of 29 out of 41 garments in the country, which represents 62% of the total garment industry, was drawn. Primary type of data was collected with the help of questionnaires and personal interviews. Additionally, secondary data was also gathered using previous research works in the sector and different documents. The collected data was analyzed using spearman's correlations in order to examine the relationship between supply chain integration and the garment's performance. Finally the research comes up with the following findings. Customer integration and internal integration have a stronger effect on product quality than the effect of supply integration on product quality. Supply integration and customer integration have positive and strong effect on competitive advantage. However, internal integration has positive but weak effect with competitive advantage. Keywords: Supply integration; Customer Integration; Internal integration; Product Quality; Competitive Advantage
Key Factors That Determine Return on Loyalty Evidence From Ethiopian Airlines Loyal Customer Base
Creators: name: Mamo, Hailemelekot
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: Full service airlines have frequent flyer programs. They carryout targeted marketing campaigns and provide economic rewards to their registered frequent flyers to induce loyalty towards their brand. Airlines measure returns on their campaigns but do not measure the extent to which their repeated effort has induced loyalty on the customers. The purpose of this research study is therefore to investigate the key factors that determine return on loyalty in the case of Ethiopian Airlines and to determine the degree to which customers have become loyal to the airline. Eleven key factors - safety, punctuality, aircraft, frequency of flights, schedule, frequent flyer program, Alliance, ticket price, airline reputation, in-flight food and drinks, and in-flight staff service were selected as predictive variables that drive loyalty to an airline. Three Loyalty factors (1) loyal customers' satisfaction, (2) loyal customer's intention to repurchase from the same airline, and (3) loyal customers' intentions to recommend the airline to others were used to measure the degree of loyalty of a customer. A total of 2,638 frequent (loyal) customers of Ethiopian Airlines residing in Ethiopia; having made more than one international air travel in the year 2014 were surveyed. 379 usable questionnaires were obtained from the respondents. The respondent's data from the survey and data from the airline frequent flyer database was used in a model to test the degree of loyalty of frequent customer towards Ethiopian Airlines. Statistical regression analysis and two population test were used to reveal the return on the loyalty. The findings of the study show that 56% of the frequent flyers chose Ethiopian Airlines on all their travel indicating 100% loyalty. This implies that airlines can measure the degree of loyalty of their frequent flyers which are the ultimate return on loyalty from a customer.
The Causes and Effects of Employees' Turnover:- The Case of Oromia Water Works Design and Supervision Enterprise
Creators: name: Racho, Aman
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: This study assessed the employee's turnover the case of Oromia Water works Design and Supervision Enterprise with the objectives of identifying different factors that are affecting and aggravating employee's turnover. Mixed research approach was used to describe the situation. Both probability and none probability sampling were used to select respondents and data gathered from both primary and secondary sources. Thus, survey, interview, and document review were used to gather the data. Systematic and purposive samplings were used to select the study participants. The findings of the study shows that terms of employment, favorable government policy an external market, lack of result oriented promotion and motivation, working environments and conditions are factors affecting employees turnover of the Enterprise. Loss in competition on market, costs of recruiting and training employees, loss of profit as a result of lack of timely deliverance of required service to customers, a combination of one or more stated effects come on the enterprise. Implementing BPR and other reforms, among efforts made by the Enterprise to reduce the effects employees turnover. In addition employing freelancers and working with different universities, employing engineers from aboard, building the capacity of internal workers to enhance their performance on work are among efforts made by the Enterprise to reduce the effects employees' turnover. In general, the enterprise could strengthen efforts stated to reduce effects of turnover. Hence, establishing incentive mechanism to encourage employees according to the weight job enrichment, job enlargement, participating employees in decision making and accepting their constructive views in solving the problem and leading the enterprise, Proper treatment of employees will increase responsibility and enhanced pay, fair promotion. Giving recognition for significant accomplishment, chance of advancement and giving opportunity to grow and career development has to be taken in to consideration. Improving working environments develop system of filling a vacant position by a person who already employed in the enterprise through upraising the employee currently holding the position is also important. Transferring an employee from a less desirable to a rewarding job elsewhere in the enterprise depending on employees fulfillment of the necessary skill, competence and education needed for the positions are among the given recommendations. Key words: employees, turnover, human resource management
Enhancing database schema with rules generated from knowledge discovery tools
Creators: name: Krishnaswamy, Shonali Priyadarshini.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
title: Restrictable Variants: A Simple and Practical Alternative to Extensible Variants (Artifact)
Creators: name: Madsen, Magnus
name: Starup, Jonathan Lindegaard
name: Lutze, Matthew
Publisher: name: Schloss Dagstuhl - Leibniz-Zentrum für Informatik
Year: 2023
Subjects: subject: restrictable variants
subject: extensible variants
subject: refinement types
subject: Boolean unification
subject: Theory of computation → Program semantics

description: In this artifact, we provide an implementation of the λ^res_var calculus, as described in the related article. The implementation is an extension of the Flix programming language compiler, supporting restrictable variants and the two partial pattern-matching constructs: choose and choose-⋆.
The artifact consists of the extended Flix compiler, a Visual Studio Code extension supporting common IDE features such as syntax highlighting and type hovering, and a collection of Flix files demonstrating the use of restrictable variants. The Flix files correspond to examples presented in the paper.
Users are invited to modify the Flix files in order to observe the influence of their changes on the inferred types in the provided programs.
description: DARTS, Vol. 9, Special Issue of the 37th European Conference on Object-Oriented Programming (ECOOP 2023), pages 12:1-12:3
An improved bound for quantum speed limit time in open quantum systems by introducing an alternative fidelity
Creators: name: Ektesabi, Abbas
name: Behzadi, Naghi
name: Faizi, Esfandyar
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, we introduce a new alternative quantum fidelity for quantum states which perfectly satisfies all Jozsas axioms and is zero for orthogonal states. By employing this fidelity, we derive an improved bound for quantum speed limit time in open quantum systems in which the initial states can be chosen as either pure or mixed. This bound leads to the well-known Mandelstamm-Tamm type bound for nonunitary dynamics in the case of initial pure states. However, in the case of initial mixed states, the bound provided by the introduced fidelity is tighter and sharper than the obtained bounds in the previous works.
description: 11 pages, 2 figures
The Influence of Saving motives on saving Habit; The Case of bank Depositors in Addis ababa city
Creators: name: Akele, Yesewzer
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: To achieve either individual or societal long term financial plans, regular saving habit is of a great importance. In modern society, money is usually saved in the form of Bank deposits. These deposits achieved as a result of various saving motives of depositors, which in turn led to saving habits. For instance, Banks give interest rate (motive) in order to make people to prefer depositing regularly (habit).In this regard, there is much debate on whether interest rate determines saving level as it can specially be seen currently in Ethiopia where saving is growing regardless of negative real interest rate. Nevertheless, the main point is that apart from interest rate benefit, which is a motive under control of Banks; depositors have many saving motives, which accordingly affect their saving habit. The study identifies seven saving motives (Bequest, Lifecycle, Independence, Precautionary, Buying Durable Goods, Profit and Calculation) and investigated their influence on saving habit (regular, irregular and not save). To do so, it was analyzed bank saving account depositors response collected using self-administered questionnaires using multinomial logistic regression. This finally helped to understand which saving motive regulates saving habit, and this could in turn enable to design suitable strategies to promote better saving. In addition, the study investigated the most important points depositors prefer to save in Banks, factors depositors look to prefer one bank from the other. It was found out that Lifecycle and Precaution saving motives were important predictors of regular saving. Gender, age, employment status, and having a child showed association with specific saving motives. Marital status and educational level was found out to be insignificant reasons to choose one saving motive from the other. Depositors gave precedence to other saving motives which influenced them to save more at the expense of low (and negative in real terms) interest rate. The improvement on saving knowledge became the first reason that made depositors to increase their saving. The need for safety was found out to be the principal reason to save in a bank. Swiftness of service, proximity of the bank to home or office, and trust were the major criteria to prefer one bank from the other. It was recommended that banks and similar institutions should promote specific goal oriented saving and design financial strategies and products suitable for each saving motives, which in turn could lead to regular saving. Key words: Saving Habit, Saving Motive, Saving Account, Calculation Motive, Banks
Equivariant structure constants for Hamiltonian-$T$-spaces
Creators: name: Leung, Ho-Hon
Publisher: name: arXiv
Year: 2016
Subjects: subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: If there exists a set of canonical classes on a compact Hamiltonian-$T$-spaces in the sense of Goldin and Tolman, we derive some formulas for certain equivariant structure constants in terms of other equivariant structure constants and the values of canonical classes restricted to some fixed points. These formulas can be regarded as a generalization of Tymoczko's results.
description: 11 pages
title: The Dolorem Pattern: Growing a Language Through Compile-Time Function Execution (Artifact)
Creators: name: Henniger, Simon
name: Amin, Nada
Publisher: name: Schloss Dagstuhl - Leibniz-Zentrum für Informatik
Year: 2023
Subjects: subject: extensible languages
subject: meta programming
subject: macros
subject: program generation
subject: compilation
subject: Software and its engineering → Compilers
subject: Software and its engineering → Language features

description: Programming languages are often designed as static, monolithic units. As a result, they are inflexible. We show a new mechanism of programming language design that allows to more flexible languages: by using compile-time function execution and metaprogramming, we implement a language mostly in itself. Our approach is usable for creating feature-rich, yet low-overhead system programming languages. We illustrate it on two systems, one that lowers to C and one that lowers to LLVM.
description: DARTS, Vol. 9, Special Issue of the 37th European Conference on Object-Oriented Programming (ECOOP 2023), pages 13:1-13:3
title: Behavioural Types for Local-First Software (Artifact)
Creators: name: Kuhn, Roland
name: Melgratti, Hernán
name: Tuosto, Emilio
Publisher: name: Schloss Dagstuhl - Leibniz-Zentrum für Informatik
Year: 2023
Subjects: subject: Distributed coordination
subject: local-first software
subject: behavioural types
subject: publish-subscribe
subject: asynchronous communication
subject: Theory of computation → Distributed computing models
subject: Software and its engineering → Distributed systems organizing principles
subject: Software and its engineering → Distributed programming languages

description: This artifact supports the theory of swarm protocols presented in the related article. Specifically, following the top-down development typical of choreographic approaches, our artifact enables the specification of systems of peers communicating through an event notification mechanism from a global viewpoint which can then be projected to local specifications of peers, rendered as machines. To the best of our knowledge, ours is the first implementation of a behavioural type framework supporting the application of the principles of local-first software for network devices which collaborate on a common task while retaining full autonomy. The artifact can be integrated in the Actyx industrial platform; this proves this work a viable step towards reasoning about local-first and peer-to-peer software systems.
description: DARTS, Vol. 9, Special Issue of the 37th European Conference on Object-Oriented Programming (ECOOP 2023), pages 14:1-14:5
Employee Turnover and Its Causes in Dream liner Hotel
Creators: name: Teferi, Yonas
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: Turnover poses a significant direct and indirect cost to organizations. Dream liner hotel isn't an exception in fact that its staff turnover rate hit 26% in 2014. Furthermore turnover has negative implication for the organization as it results in lower productivity, lower employee commitment, loss of experienced personnel and costs associated with learning curve for new employees. By employed casual survey research method the paper focuses on uncovering factors that influence turnover in the context of Dreamliner hotel. There were four factors that were identified and that were the main focus of this research paper. The first factor pertains to employee relation. This factor is related to dimensions like leadership style, availability of conflict resolution mechanisms, recognition for a job well done, implementation of succession plans, concern for the welfare of employees and the availability of for promotion. The other factor identified relates to extrinsic factors which encompass different areas like salary & benefit, food & allowances, the availability of transport pool for employees and medical insurance. There were also intrinsic factors that were identified and these factors include job satisfaction, target achievement, the need to achieve work experience and control over one's work. Finally career development factors were identified and this factor relates to the availability of career path, training, coaching, mentorship, and different types of skill advancement programs. The results revealed that there was an inverse relationship between employee relations, extrinsic factors, intrinsic factors and career development when compared against turnover. A progress in all those factors leads to improvement in turnover and change for the better towards retaining employees. Also results revealed that employee relation has the highest correlation with turnover followed by extrinsic factors, intrinsic factor and lastly career path development factors, so that the management of the hotel should came up with proper employee retention package to tackle the flow of their valuable resources.
Mean-field message-passing equations in the Hopfield model and its generalizations
Creators: name: Mezard, Marc
Publisher: name: arXiv
Year: 2016
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Motivated by recent progress in using restricted Boltzmann machines as preprocessing algorithms for deep neural network, we revisit the mean-field equations (belief-propagation and TAP equations) in the best understood such machine, namely the Hopfield model of neural networks, and we explicit how they can be used as iterative message-passing algorithms, providing a fast method to compute the local polarizations of neurons. In the "retrieval phase" where neurons polarize in the direction of one memorized pattern, we point out a major difference between the belief propagation and TAP equations : the set of belief propagation equations depends on the pattern which is retrieved, while one can use a unique set of TAP equations. This makes the latter method much better suited for applications in the learning process of restricted Boltzmann machines. In the case where the patterns memorized in the Hopfield model are not independent, but are correlated through a combinatorial structure, we show that the TAP equations have to be modified. This modification can be seen either as an alteration of the reaction term in TAP equations, or, more interestingly, as the consequence of message passing on a graphical model with several hidden layers, where the number of hidden layers depends on the depth of the correlations in the memorized patterns. This layered structure is actually necessary when one deals with more general restricted Boltzmann machines.
description: 29 pages, 4 figures
Framing and Agenda Setting following the Mass Shooting Terror Attack in Christchurch, New Zealand
Creators: name: Bensman Monin, Kira
Publisher: name: Unknown
Year: 2020

description: Despite thousands of gun-related deaths and injuries in the last decade, the United States federal government has yet to enact comprehensive gun reforms. Meanwhile, New Zealand recently experienced the deadliest mass shooting in its history, and within one week, Prime Minister Jacinda Ardern had announced major reforms. This paper analyzes the Prime Minister’s response and her power in shaping the discourse of the event in the immediate aftermath of the shooting. It focuses on her public statements in the six days that followed the event, and analyzes them with the concepts of framing and agenda setting.
title: Modular Verification of State-Based CRDTs in Separation Logic (Artifact)
Creators: name: Nieto, Abel
name: Daby-Seesaram, Arnaud
name: Gondelman, Léon
name: Timany, Amin
name: Birkedal, Lars
Publisher: name: Schloss Dagstuhl - Leibniz-Zentrum für Informatik
Year: 2023
Subjects: subject: separation logic
subject: distributed systems
subject: CRDT
subject: replicated data type
subject: formal verification
subject: Theory of computation → Program verification
subject: Theory of computation → Distributed algorithms
subject: Theory of computation → Separation logic

description: This is the documentation of the artifact for the paper "Modular Verification of State-Based CRDTs in Separation Logic". The artifact consists of a Coq formalization of the safety proofs for state-based CRDTs described in the paper. The Coq proofs are written in the Aneris distributed separation logic.
description: DARTS, Vol. 9, Special Issue of the 37th European Conference on Object-Oriented Programming (ECOOP 2023), pages 15:1-15:5
The fractional Brownian Motion : traffic model and related studies
Creators: name: Lavaud, Nicolas.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Determinants of Household Demand for Improved Water Services: A Case Study of the Contingent Valuation Survey in Addis Ababa, Ethiopia
Creators: name: Chaka, Assefa
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 1998

description: The demand for improved water services is determined by a number of socio-economic and demographic factors and water attributes. Information on the demand side are relevant for policy purposes such as tariff structure and the choices of appropriate water supply schemes. various methods of determining households' preference and willingness to pay for improved water services are used in developing countries. \ In this study both the contingent valuation survey (direct method) and the indirect (revealed preference) methods are used to estimate households' willingness to pay for improvedwater services in the city of Addis Ababa, Ethiopia. The research was based on primary cross-sectional data from sampled households of different locations in the city. In the indirect method the binomial probit model was used to determine factors influencing households' decisions to connect to the piped water scheme. The CV approaches were utilised to investigate the determinants of households' willingness- to-pay for private connection and public taps. The mean WTP bids for private connections and public taps are well above the current subsidised tariff, 8.66 and 4.7 cents per baldi, respectively. The results of the study revealed that the uses of the two approaches can provide policy relevant information on the level and type of improvedwater services required by households and how they should be paid for. Household income, ownership of house, age and education level are significant determinants of households' decisions to connect to the piped schemes. The significant variables influencing the WTP responses include income, education level and sex of the household head, household size, time for fetching water and household's attitude toward the responsibility of water provision. The ordered probit model used for estimating of WTP responses of the CVM is found to be a promising approach to predict the number of households who will use an improved system if various prices were charged and to derive demand schedules. And raising tariff with unconstrained supply increases consumer surplus, number of connecting households and revenue for water utility.
title: ConDRust: Scalable Deterministic Concurrency from Verifiable Rust Programs (Artifact)
Creators: name: Suchert, Felix
name: Zeidler, Lisza
name: Castrillon, Jeronimo
name: Ertel, Sebastian
Publisher: name: Schloss Dagstuhl - Leibniz-Zentrum für Informatik
Year: 2023
Subjects: subject: concurrent programming
subject: verification
subject: scalability
subject: Theory of computation → Parallel computing models
subject: Software and its engineering → Parallel programming languages

description: SAT/SMT-solvers and model checkers automate formal verification of sequential programs. Formal reasoning about scalable concurrent programs is still manual and requires expert knowledge. But scalability is a fundamental requirement of current and future programs.
Sequential imperative programs compose statements, function/method calls and control flow constructs. Concurrent programming models provide constructs for concurrent composition. Concurrency abstractions such as threads and synchronization primitives such as locks compose the individual parts of a concurrent program that are meant to execute in parallel. We propose to rather compose the individual parts again using sequential composition and compile this sequential composition into a concurrent one. The developer can use existing tools to formally verify the sequential program while the translated concurrent program provides the dearly requested scalability.
Following this insight, we present ConDRust, a new programming model and compiler for Rust programs. The ConDRust compiler translates sequential composition into a concurrent composition based on threads and message-passing channels. During compilation, the compiler preserves the semantics of the sequential program along with much desired properties such as determinism.
Our evaluation shows that our ConDRust compiler generates concurrent deterministic code that can outperform even non-deterministic programs by up to a factor of three for irregular algorithms that are particularly hard to parallelize.
description: DARTS, Vol. 9, Special Issue of the 37th European Conference on Object-Oriented Programming (ECOOP 2023), pages 16:1-16:3
Ensemble X-ray variability of Active Galactic Nuclei. II. Excess Variance and updated Structure Function
Creators: name: Vagnetti, F.
name: Middei, R.
name: Antonucci, M.
name: Paolillo, M.
name: Serafinelli, R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Most investigations of the X-ray variability of active galactic nuclei (AGN) have been concentrated on the detailed analyses of individual, nearby sources. A relatively small number of studies have treated the ensemble behaviour of the more general AGN population in wider regions of the luminosity-redshift plane. We want to determine the ensemble variability properties of a rich AGN sample, called Multi-Epoch XMM Serendipitous AGN Sample (MEXSAS), extracted from the fifth release of the XMM-Newton Serendipitous Source Catalogue (XMMSSC-DR5), with redshift between 0.1 and 5, and X-ray luminosities in the 0.5-4.5 keV band between 10^42 and 10^47 erg/s. We urge caution on the use of the normalised excess variance (NXS), noting that it may lead to underestimate variability if used improperly. We use the structure function (SF), updating our previous analysis for a smaller sample. We propose a correction to the NXS variability estimator, accounting for the light curve duration in the rest frame on the basis of the knowledge of the variability behaviour gained by SF studies. We find an ensemble increase of the X-ray variability with the rest-frame time lag tau, given by tau^0.12. We confirm an inverse dependence on the X-ray luminosity, approximately as L_X^-0.19. We analyse the SF in different X-ray bands, finding a dependence of the variability on the frequency as nu^-0.15, corresponding to a softer when brighter trend. In turn, this dependence allows us to parametrically correct the variability estimated in observer-frame bands to that in the rest frame, resulting in a moderate shift upwards (V-correction). Ensemble X-ray variability of AGNs is best described by the structure function. An improper use of the normalised excess variance may lead to an underestimate of the intrinsic variability, so that appropriate corrections to the data or the models must be applied to prevent these effects.
description: 9 pages, 13 figures, to appear on Astronomy and Astrophysics; v2 updated with language editing and a few clarifications about structure function
From tunneling to contact in a magnetic atom: the non-equilibrium Kondo effect
Creators: name: Choi, Deung-Jang
name: Abufager, Paula
name: Limot, Laurent
name: Lorente, Nicolas
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A low-temperature scanning tunneling microscope was employed to study the differential conductance in an atomic junction formed by an adsorbed Co atom on a Cu(100) surface and a copper-covered tip. A zero-bias anomaly (ZBA) reveals spin scattering off the Co atom, which is assigned to a Kondo effect. The ZBA exhibits a characteristic asymmetric lineshape when electrons tunnel between tip and sample, while upon the tip-Co contact it symmetrizes and broadens. Through density functional theory calculations and the non-equilibrium non-crossing approximation we show that the lineshape broadening is mainly a consequence of the additional coupling to the tip, while non-equilibrium effects only modify the large-bias tails of the ZBA.
title: A Direct-Style Effect Notation for Sequential and Parallel Programs (Artifact)
Creators: name: Richter, David
name: Böhler, Timon
name: Weisenburger, Pascal
name: Mezini, Mira
Publisher: name: Schloss Dagstuhl - Leibniz-Zentrum für Informatik
Year: 2023
Subjects: subject: do-notation
subject: parallelism
subject: concurrency
subject: effects
subject: Software and its engineering → Domain specific languages
subject: Software and its engineering → Concurrent programming structures
subject: Software and its engineering → Parallel programming languages

description: Modeling sequential and parallel composition of effectful computations has been investigated in a variety of languages for a long time. In particular, the popular do-notation provides a lightweight effect embedding for any instance of a monad. Idiom bracket notation, on the other hand, provides an embedding for applicatives. First, while monads force effects to be executed sequentially, ignoring potential for parallelism, applicatives do not support sequential effects. Composing sequential with parallel effects remains an open problem. This is even more of an issue as real programs consist of a combination of both sequential and parallel segments. Second, common notations do not support invoking effects in direct-style, instead forcing a rigid structure upon the code.
In this paper, we propose a mixed applicative/monadic notation that retains parallelism where possible, but allows sequentiality where necessary. We leverage a direct-style notation where sequentiality or parallelism is derived from the structure of the code. We provide a mechanisation of our effectful language in Coq and prove that our compilation approach retains the parallelism of the source program.
description: DARTS, Vol. 9, Special Issue of the 37th European Conference on Object-Oriented Programming (ECOOP 2023), pages 17:1-17:3
Geometric Correlations and Breakdown of Mesoscopic Universality in Spin Transport
Creators: name: Adagideli, İnanç
name: Jacquod, Philippe
name: Scheid, Matthias
name: Duckheim, Mathias
name: Loss, Daniel
name: Richter, Klaus
Publisher: name: Universität Regensburg
Year: 2010
Subjects: subject: 530 Physik
subject: 73.23.-b, 72.25.Dc, 85.75.-d

description: We construct a unified semiclassical theory of charge and spin transport in chaotic ballistic and disordered diffusive mesoscopic systems with spin-orbit interaction. Neglecting dynamic effects of spin-orbit interaction, we reproduce the random matrix theory results that the spin conductance fluctuates universally around zero average. Incorporating these effects into the theory, we show that geometric correlations generate finite average spin conductances, but that they do not affect the charge conductance to leading order. The theory, which is confirmed by numerical transport calculations, allows us to investigate the entire range from the weak to the previously unexplored strong spin-orbit regime, where the spin rotation time is shorter than the momentum relaxation time.
Valuing the Economic Benefit of Ecotourism Areas with Travel Cost and Choice Experiment Methods: A Case Study of Semen Mountain National Park, Ethiopia
Creators: name: Yibrie, Ali
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2011

description: Simen Mountain National Park is one of the most well-known nature based recreational sites due to it's an impressive landscape and endemic wild animals. It was established in 1969 and was inscribed in the list of World Heritage sites by UNESCO in 1978. But this park has been in the list of world Heritage in danger since 1996 due to heavy settlement by farmers, declining numbers of Walia ibex, widespread deforestation and continuous reduction in recreational qualities of the site. Furthermore, the site has been unable to improve the qualities of ecotourism experience and expand the types and variety of its recreational services for a long time because of lack of sustainable income from internal sources. Moreover, the value of the park in terms of its recreational service to the society is not known. Thus, there is a need for valuation of the park to know how much value the people attach to the park so as to demonstrate how the site managers can extract revenue out of the excess benefit so as to improve the qualities of the national park and expand the types and variety of the services. These in turn enables to establish a sustainable and efficient level of operations for the maintenance of the park. In doing so, this study used travel cost and choice experiment valuation methods to estimate and analyze the value visitors attach to the park. From the travel cost method, the expected aggregate annual recreational economic benefit gained by visitors of the site is estimated at Birr 48,562,086.4 (approximately US$ 2,943,156.7). While the choice experiment method (CE) was employed to measure visitor's valuation of different attributes of the site, and to examine their general perception towards the park's services and resources. Three attributes that can explain the park's quality (namely, the number of Walia ibex and Ethiopian wolf population, afforestation and additional service to visitors) and one monetary attribute were included in choice experiment. Multinomial and random parameter logit models were used for estimation and from this the marginal willingness to pay and welfare impact of the visitors was estimated. The results of this study indicate that the recreational economic benefit of the park are much larger than what is currently collected by park authorities and thus the park authority can change the current prices of services. Moreover, alleviating the major problems that reduce the quality of the site and supporting improvement and expansion projects are promising for resource users and the management of the park as the visitors are willing to pay to support the plan for the park improvement
title: Synthetic Behavioural Typing: Sound, Regular Multiparty Sessions via Implicit Local Types (Artifact)
Creators: name: Jongmans, Sung-Shik
name: Ferreira, Francisco
Publisher: name: Schloss Dagstuhl - Leibniz-Zentrum für Informatik
Year: 2023
Subjects: subject: behavioural types
subject: multiparty session types
subject: choreographies
subject: Theory of computation → Concurrency

description: Programming distributed systems is difficult. Multiparty session typing (MPST) is a method to automatically prove safety and liveness of protocol implementations relative to protocol specifications.
In the related article ("Synthetic Behavioural Typing: Sound, Regular Multiparty Sessions via Implicit Local Types", in ECOOP 2023, LIPIcs, Vol. 263, pp. 42:1-42:30), we introduce two new techniques to significantly improve the expressiveness of the MPST method: projection is based on implicit local types instead of explicit; type checking is based on the operational semantics of implicit local types instead of on the syntax. That is, the reduction relation on implicit local types is used not only "a posteriori" to prove type soundness (as usual), but also "a priori" to define the typing rules - synthetically.
Classes of protocols that can now be specified/implemented/verified for the first time using the MPST method include: recursive protocols in which different roles participate in different branches; protocols in which a receiver chooses the sender of the first communication; protocols in which multiple roles synchronously choose both the sender and the receiver of a next communication, implemented as mixed input/output processes. In the related article, we present the theory of the new techniques, as well as their future potential, and we demonstrate their present capabilities to effectively support regular expressions as global types (not possible before).
As evidence that the new techniques are implementable, we implemented them; this implementation is available in this artifact.
description: DARTS, Vol. 9, Special Issue of the 37th European Conference on Object-Oriented Programming (ECOOP 2023), pages 18:1-18:2
Survey of debugging : does object-oriented debugging exist?
Creators: name: He, Ping.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Adaptive Re-use of Zahir ol-Islam Mansion + Building Information
Creators: name: Farshad, Armin
Publisher: name: Zenodo
Year: 2023

description: The Zahir ol-Islam Mansion, located in the central district of Tehran, Iran, is a notable example of Qajar-era architecture. While there are no definitive plaques or inscriptions detailing its exact construction date, studies suggest that the building was likely constructed in the later years of Naser-Eldin Shah’s reign, between 1848 and 1896. This estimate is based on the building's blend of traditional and European architectural styles, as well as its distinctive gable roof (Faraji et al., 2022). 

The mansion’s architecture is a harmonious mix of Iranian and Western styles, featuring intricate plasterwork, Islamic pattern carvings, and decorative brickwork. The study's findings propose an adaptive reuse of the mansion, suggesting it be transformed into a flexible boutique hotel and heritage book gallery.
title: VeriFx: Correct Replicated Data Types for the Masses (Artifact)
Creators: name: De Porre, Kevin
name: Ferreira, Carla
name: Gonzalez Boix, Elisa
Publisher: name: Schloss Dagstuhl - Leibniz-Zentrum für Informatik
Year: 2023
Subjects: subject: distributed systems
subject: eventual consistency
subject: replicated data types
subject: verification
subject: Software and its engineering → Domain specific languages
subject: Computing methodologies → Distributed programming languages
subject: Theory of computation → Distributed algorithms

description: Our related article presents our novel verification language, called VeriFx. We used VeriFx to implement and verify 51 Conflict-Free Replicated Data Types (CRDTs) and 9 Operational Transformation (OT) functions.
This artifact bundles the implementation of the various CRDTs and OT functions described in the article. The artifact also contains a Docker file that can be used to reproduce the verification results (Table 1 and 2 in the article). In addition, the artifact can also be used to run custom VeriFx programs and verify their correctness.
description: DARTS, Vol. 9, Special Issue of the 37th European Conference on Object-Oriented Programming (ECOOP 2023), pages 19:1-19:2