cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Effect of Job Satisfaction on Employees' Turnover Intention (The Case of Commercial Bank of Ethiopia)
Creators: name: Michael, Tadesse
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: The purpose of the study was to examine the effect of job satisfaction on employees' turnover intention with job satisfaction dimensions of payment, promotion, nature of work, supervision and achievement. The researcher adopted explanatory research design to explain, understand and predict the cause and effect relationship between variables. The target populations under study were 805 employees from 12 purposively selected branches. In order to gather primary data from the respondent a self-administered questionnaire applied for the study. Among the total population 267 employees were randomly selected out of which 250 questionnaires returned. Data analyzed by using descriptive statistics that includes percentages, frequency distribution tables. Correlation analysis also used in this study to test the relation between dependent (Job satisfaction) and independent (Turnover Intention) variables. The finding of the study showed that, all job satisfaction variables have negative relationship or correlation with employees' turnover intention. Furthermore, the result of multiple linear regression variables like payment, promotion, and nature of work has negative and statistically significant effect on employee's turnover intention. On the other hand, the impact of supervision and achievement has showed statistically insignificant effect on employee's turnover intention. Based on the findings of the study recommendations forwarded for management of the bank to continuously examine and improve the existing HR policy and procedure on Payment, promotion opportunity and nature of the work that may guarantee continuous satisfaction of employees and to keep them retained in the bank.
Techno-Economic Analysis of Marine Ecosystem to Achieve Zero Carbon Emission
Creators: name: Tee, J.Z.
Publisher: name: WIP
Year: 2021
Subjects: PV Applications, Integration and Storage
Energy System Integration

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1499-1501
description: In marine industry, Flettner Rotor (FR) is being exploited as the integrated power source with conventional system on-board marine vessel as complementary resource to be introduced for fuel saving as well as reduction in carbon footprint. As such, an integrated system of Diesel Engine (DE) and FR with combined Photovoltaic (PV) and battery energy storage system (BESS) is developed to propose to meet the load demand on voyage, highly dependent on weather condition sailing in geographically. In this paper, power stability is verified with simulation (ETAP) has shown cargo ship with proposed system configuration can adapt this methodology to meet required load demand with smoothing control in load fluctuation. The return on investment will be presented to compare between proposed system and convention system for Capital Expenditure (Capex) and Operational Expenditure (Opex). As such, cost analysis on proposed system can increase the value in investment to be further developed into business model.
EMPOWERING PATIENT WELLNESS: THE EXPANDING ROLE OF PHYSICIANS AS HEALTH EDUCATORS IN PRIMARY CARE
Creators: name: Nurul, Aisyah Mohd Ali
Publisher: name: CARSON JOURNAL
Year: 2024
Subjects: Acute Coronary Syndrome (ACS), Statins,Cardiovascular Disease, Muscle-Related Side Effects, Medication Management

description: The incidence of Acute Coronary Syndrome (ACS) is on the rise, making it a pressing global health concern. In Malaysia, cardiovascular diseases have consistently ranked as the leading cause of mortality for several decades, with cardiovascular disease contributing significantly to the non-communicable disease-related deaths. Statins, a class of prescription drugs designed to lower cholesterol levels, play a pivotal role in preventing ACS. However, they are associated with statin-related side effects, primarily muscle-related issues, including pain, lethargy, weakness, and myopathy. Observational studies have reported muscle problems in a substantial proportion of patients, ranging from 10% to 30%, while randomized controlled trials have indicated a lower but still significant incidence, affecting up to 5% of patients. Given the increasing significance of ACS, it is crucial to critically identify effective management and treatment strategies for this condition.
High quality voice conversion using prosodic and high-resolution spectral features
Creators: name: Nguyen, Hy Quy
name: Lee, Siu Wa
name: Tian, Xiaohai
name: Dong, Minghui
name: Chng, Eng Siong
Publisher: name: arXiv
Year: 2015
Subjects: subject: Sound (cs.SD)
subject: FOS: Computer and information sciences

description: Voice conversion methods have advanced rapidly over the last decade. Studies have shown that speaker characteristics are captured by spectral feature as well as various prosodic features. Most existing conversion methods focus on the spectral feature as it directly represents the timbre characteristics, while some conversion methods have focused only on the prosodic feature represented by the fundamental frequency. In this paper, a comprehensive framework using deep neural networks to convert both timbre and prosodic features is proposed. The timbre feature is represented by a high-resolution spectral feature. The prosodic features include F0, intensity and duration. It is well known that DNN is useful as a tool to model high-dimensional features. In this work, we show that DNN initialized by our proposed autoencoder pretraining yields good quality DNN conversion models. This pretraining is tailor-made for voice conversion and leverages on autoencoder to capture the generic spectral shape of source speech. Additionally, our framework uses segmental DNN models to capture the evolution of the prosodic features over time. To reconstruct the converted speech, the spectral feature produced by the DNN model is combined with the three prosodic features produced by the DNN segmental models. Our experimental results show that the application of both prosodic and high-resolution spectral features leads to quality converted speech as measured by objective evaluation and subjective listening tests.
Dynamical angled brane
Creators: name: Maeda, Kei-ichi
name: Uzawa, Kunihito
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss the dynamical D$p$-brane solutions describing any number of D$p$-branes whose relative orientations are given by certain SU(2) rotations. These are the generalization of the static angled D$p$-brane solutions. We study the collision of dynamical D3-brane with angles in type II string theory, and show that the particular orientation of the smeared D3-brane configuration can provide an example of colliding branes if they have the same charges. Otherwise a singularity appears before D3-branes collide.
description: 25 pages, 7 figures
Degradation of Supply Reliability in Stand-Alone Systems due to Modeling Strategies
Creators: name: Timaná, L.
name: Gemignani, M.
name: Rostegui, G.
name: Almeida, C.F.M.
Publisher: name: WIP
Year: 2021
Subjects: PV Applications, Integration and Storage
Energy System Integration

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1488-1493
description: This work aims to evaluate strategies to simplify the modeling of stand-alone systems, which are normally used in planning to estimate impacts on supply reliability and propose future projects. The evaluation is carried out assuming simplifications in generation and demand parameters for different scenarios, with real data and taking into account the interaction between demand, photovoltaic generation and energy storage system. The impacts on the reliability of the supply are estimated through continuity and quality indicators. The simplifications assumed in this methodology can be applied to other stand-alone systems with different renewable energy sources in combination with energy storage systems.
Packing Carton Box Suppliers` Evaluation and Selection in Large & Medium Scale Manufacturers of Food Products and Beverages in Addis Ababa City
Creators: name: Chane, Birhanu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: pplier selection process is a process to select the best supplier that can offer the best deal on all required criteria among other related suppliers which compete with in the same industry. Selecting a supplier is not a simple task rather it is a complex problem which involves qualitative and quantitative multi-criteria. The objective of the study is to recommend the importance of a multi criteria decision making approach which is analytical hierarchy process (AHP) for supplier evaluation and selection. To reduce the time and effort in selecting a supplier, a multi- criteria decision model is used for evaluation and selection of suppliers with the proposed AHP model by scoring the performance of suppliers. The Analytical Hierarchy Process (AHP) is one of the various supplier selection approaches that are used to select the appropriate supplier. Therefore, an AHP supplier selection model is formulated and then applied to a given set of data for food and beverage manufacturing companies in Addis Ababa. The model provides a clear step to evaluate four criterion and thirteen sub criteria, depending on its importance in order to select the right supplier. In this study, probability sampling method is used. In order to undertake this research, by using simple random sampling techniques sample size of 35 food and beverage manufacturing industries in Addis Ababa were drawn from the valid target population of the study which is 39. Primary type of data was collected with the help of standard questionnaires and SPSS also used for the simple descriptive data to compute the percentage scores of each criterion and sub criteria. Summary of the findings of the study indicate that among the selected four criteria, quality is the first or best supplier selection criterion followed by price, delivery and service in respectively and among the suppliers considered in the study, Burayu Packaging and Printing Industry is the most preferred supplier followed by Ethiopian Pulp and Paper ,Unlimited Packaging and Minaye Packaging in respectively. Based on the findings the researcher recommended food and beverage manufacturing companies to give a high emphasis for quality during purchasing of packaging materials so as to save the overall implicit and explicit costs of companies and better to have a long term business relationship supply chain agreement with Burayu Packaging and Printing Industry or the next most preferred supplier which is Ethiopian Pulp and Paper so as to save a sustainable and consistent packaging supply. Key words: Supplier selection, Supplier selection Criteria, Analytical Hierarchy Process, Supplier Evaluation purchasing supply management
Dual-Primal Isogeometric Tearing and Interconnecting solvers for multipatch dG-IgA equations
Creators: name: Hofer, Christoph
name: Langer, Ulrich
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: In this paper we consider a new version of the dual-primal isogeometric tearing and interconnecting (IETI-DP) method for solving large-scale linear systems of algebraic equations arising from discontinuous Galerkin (dG) isogeometric analysis of diffusion problems on multipatch domains with non-matching meshes. The dG formulation is used to couple the local problems across patch interfaces. The purpose of this paper is to present this new method and provide numerical examples indicating a polylogarithmic condition number bound for the preconditioned system and showing an incredible robustness with respect to large jumps in the diffusion coefficient across the interfaces.
description: arXiv admin note: text overlap with arXiv:1511.07183
Validation of a Technical Solution for a Stand-Alone PV Heat Pump System without Batteries
Creators: name: Lorenzo, C.
name: Almeida, R.H.
name: Narvarte Fernández, L.
Publisher: name: WIP
Year: 2021
Subjects: PV Applications, Integration and Storage
Energy System Integration

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1472-1476
description: The coupling of PV generators and heat pump (HP) units permits to supply the increasing heating/cooling demand with an efficient, renewable and environmentally friendly technology. This work presents the validation results of a technical solution for a stand-alone PV-HP prototype without batteries. The lack of batteries offers economic advantages but sets the additional problem of managing the solar power fluctuations due to cloudpassing. The cloud-passing algorithm implemented in this work was able to avoid the abrupt stop of the system for 75% of the cloud-passing events registered. For the performance assessment, a combination of traditional and new Key Performance Indicators (KPIs) is proposed. The PR ranged from 0.16 to 0.54, the low values explained by the utilization ratios of the system (UREF ranged from 0.25 to 0.77). The PV system and HP unit good performance is reflected on the PV,STC (between 0.84 and 0.96) and on the SPF (between 2.49 and 3.26).
Regional Hydrogen Concept in the Commercial Sector for the Use of PV Yield
Creators: name: Prinz, H.
name: Te Heesen, H.
Publisher: name: WIP
Year: 2021
Subjects: PV Applications, Integration and Storage
Energy System Integration

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1477-1481
description: The electrical energy generated by photovoltaics (PV) contributes significantly to the transition to green energy production. This publication deals with a regional hydrogen storage concept for using PV yields in the commercial sector using the example of a PV carport system with battery and charging station operation at the Environmental Campus Birkenfeld, Trier University of Applied Sciences, in Germany. The PV system has a total capacity of 729.6 kWp. It is investigated whether the PV carport system with charging column operation can be realized economically. In addition, the expenses for a future without the construction and operation of the facilities is calculated, which consist only of grid purchase costs. If these are greater than the expenses of the solar carports, the investment is economically advantageous. Subsequently, the concept is complemented by a hydrogen electrolysis plant, hydrogen storage and a fuel cell to convert and store surplus PV electricity into hydrogen.
Smart Energy Management for SME Using Digital Twins
Creators: name: Da Costa Fernandes, J.S.
name: Schmidt, M.
name: Khatri, R.
name: Gasper, R.
name: Hartmann, N.
Publisher: name: WIP
Year: 2021
Subjects: PV Applications, Integration and Storage
Energy System Integration

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1482-1487
description: The twin concept is increasingly used for optimization tasks in the context of Industry 4.0 and digitization. The twin concept can also help small and medium-sized enterprises (SME) to exploit their energy flexibility potential and to achieve added value by appropriate energy marketing. At the same time, this use of flexibility helps to realize a climate-neutral energy supply with high shares of renewable energies. The digital twin reflects real production, power flows and market influences as a computer model, which makes it possible to simulate and optimize on-site interventions and interactions with the energy market without disturbing the real production processes. This paper describes the development of a generic model library that maps flexibility-relevant components and processes of SME, thus simplifying the creation of a digital twin. The paper also includes the development of an experimental twin consisting of SME hardware components and a PLC-based SCADA system. The experimental twin provides a laboratory environment in which the digital twin can be tested, further developed and demonstrated on a laboratory scale. Concrete implementations of such a digital twin and experimental twin are described as examples.
Applications of a finite-volume algorithm for incompressible MHD problems
Creators: name: Vantieghem, S.
name: Sheyko, A.
name: Jackson, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We present the theory, algorithms and implementation of a parallel finite-volume algorithm for the solution of the incompressible magnetohydrodynamic (MHD) equations using unstructured grids that are applicable for a wide variety of geometries. Our method implements a mixed Adams-Bashforth/Crank-Nicolson scheme for the nonlinear terms in the MHD equations and we prove that it is stable independent of the time step. To ensure that the solenoidal condition is met for the magnetic field, we use a method whereby a pseudo-pressure is introduced into the induction equation; since we are concerned with incompressible flows, the resulting Poisson equation for the pseudo-pressure is solved alongside the equivalent Poisson problem for the velocity field. We validate our code in a variety of geometries including periodic boxes, spheres, spherical shells, spheroids and ellipsoids; for the finite geometries we implement the so-called ferromagnetic or pseudo-vacuum boundary conditions appropriate for a surrounding medium with infinite magnetic permeability. This implies that the magnetic field must be purely perpendicular to the boundary. We present a number of comparisons against previous results and against analytical solutions, which verify the code's accuracy. This documents the code's reliability as a prelude to its use in more difficult problems. We finally present a new simple drifting solution for thermal convection in a spherical shell that successfully sustains a magnetic field of simple geometry. By dint of its rapid stabilization from the given initial conditions, we deem it suitable as a benchmark against which other self-consistent dynamo codes can be tested.
VALUTAZIONE DEL RINFORZO RADICALE DEL SUOLO OPERATO DALLE RADICI DELLE PRINCIPALI SPECIE FORESTALI DELLA LOMBARDIA
Creators: name: EPIS, THOMAS
Publisher: name: Universit� degli Studi di Milano
Year: 2010

description: Forests can prevent and/or mitigate hydrogeomorphic hazards in mountainous landscapes. Their effect is particularly relevant in the case of shallow landslides phenomena, where plants decrease the water content of the soil and increase its mechanical strength. Although such an effect is well known from ages, its quantification is a relatively new challenge. The present dissertation faces the effect on hillslope stability of several forest species typical of Lombardy?s mountain forests. Such effects are estimate in terms of additional root cohesion by the classical Wu (1976) and Waldron (1977) model (W&W) and by Fiber Bundle Model approach (FBM). Samples of European beech (Fagus sylvatica L.), Norway spruce (Picea abies (L.) Karst.), European larch (Larix decidua Mill.), sweet chestnut (Castanea sativa Mill.) and European hop-hornbeam (Ostrya carpinifolia Scop.), Sycamore Maple (Acer pseudoplatanus L.), Grey Alder or Speckled Alder (Alnus incana (L.) Moench), European Ash (Fraxinus excelsior L.), Manna Ash (Fraxinus ornus L.), Black Locust (Robinia pseudoacacia L.), were taken in different locations of Lombardy (Northern Italy) to estimate root tensile strength, Root Area Ratio the root cohesion distribution within the soil. Besides the increasing of knowledge concerning the ability of the mentioned species to reinforce soils, that are fundamental to estimate the stability of forested hillslopes in the Alps, the dissertation reaches some more general results. Referring to root tensile strength, the obtained results confirm that such property is related to root size by a power law relationship. Such relationship, however, is not invariant with species but shows dependence with site?s characteristics, although the observed variability is very high and no specific factor has been resulted as a key factor. Considering roots with a diameter greater than 1 mm, European beech roots seem to be more resistant than Norway spruce, Sweet chestnut and European Ash. Referring to Root Area Ratio, the results herein presented showed a great variability within the same species at the same location and among different locations. Despite the number of rooted profiles investigated, such variability hindered the possibility to identify a specie-specific or site-specific behaviour. Concerning root cohesion modelling, the original W&W model seems to overestimate root reinforcement because it assumes that all the roots crossing the shear surface break at the same time. FBM approach, instead, accounting for the progressive breaking of roots represents a promising perspective in root cohesion evaluation. Root cohesion values present the same species and site variability according to RAR values. The values herein obtained, moreover, are consistent with the results of direct shear tests and back-analysis data and, finally, they are significant for slope stabilisation at depth where shallow landslides generally occur.
Microgrid Energy Management Control with a Vanadium Redox Flow and a Lithium-Ion Hybrid Battery System for PV Integration
Creators: name: Neves Foles, A.C.
name: Fialho, L.A.
name: Collares-Pereira, M.P.I.
Publisher: name: WIP
Year: 2021
Subjects: PV Applications, Integration and Storage
Storage

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1464-1469
description: Hybrid energy storage systems combine multiple energy storage technologies, to improve the overall storage’s performance and lifetime expectancy, compared to a single storage unit. This work proposes an online power/energy sharing management control of a hybrid energy storage system and a simulation tool developed by the authors. The hybridized system is composed of two PV installations (3.6 kWp and 6.7 kWp), a vanadium redox flow battery (VRFB) (5.0 kW /60 kWh) and a lithium-ion battery (LIB) (3.3 kW useful /9.8 kWh). The software simulation architecture is designed using MATLAB, where three hypothetical operation scenarios are simulated, with the aim of optimizing the energy usage according to its technical characteristics, current state operation and PV generation, with a 1-year time frame. The system’s overall performance is evaluated through three technical keyperformance indicators. The combination of different energy storage technologies is a feasible solution that depends on the application goals and on the assurance of the accuracy and reliability of the system and its control strategy.
Coenogonium Ehrenb. In
Creators: name: Kalb, Jutarat
name: Boonpragob, Kansri
name: Kalb, Klaus
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Fungi
Ascomycota
Lecanoromycetes
Ostropales
Coenogoniaceae
Coenogonium

description: Coenogonium Ehrenb. In : Nees von Esenbeck, Horae Physicae Berolinenses: 120 (1820).
 Type:— Coenogonium linkii Ehrenb.
 Dimerella Trevis., Rend. Reale Ist. Lomb. Sci., ser. 2, 13 (3): 66 (1880).— Lectotype (selected by Santesson 1952: 391): Dimerella lutea (Dicks.) Trevis., Rend. Reale Ist. Lomb. Sci., ser. 2, 13 (3): 66 (1880).—For further synonyms see Lücking (2008: 562–563).
description: Published as part of Kalb, Jutarat, Boonpragob, Kansri & Kalb, Klaus, 2016, New Coenogonium species (Ostropales: Coenogoniaceae) from Thailand, new reports and a revised key to the species occurring in the country, pp. 101-122 in Phytotaxa 283 (2) on page 105, DOI: 10.11646/phytotaxa.283.2.1, http://zenodo.org/record/13645236
Agent-Based Behaviors Model for Peer-to-Peer Energy Trading Linked to Blockchain
Creators: name: Sajjad, M.
name: Boumaiza, A.
name: Sanfilippo, A.
Publisher: name: WIP
Year: 2021
Subjects: PV Applications, Integration and Storage
Energy System Integration

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1470-1471
description: The aim of this paper is to illustrate the essential components and functioning of a blockchain system and implement a generic ABM simulation framework for energy exchange. A major novel contribution of this work is the development of a virtual environment to test and validate the secure and equitable energy trading among participants using a simplified agent modeling approach to analyze the impacts of peer-to-peer energy trading on market operational performance. This work addresses the optimization of residential energy cost in peer-to-peer (P2P) energy trading by balancing energy supply and demand and minimizing the use of energy from the grid. The proposed model provides a constraint-based multiple-objective optimization approach where the impact of various factors is taken into account, including energy storage; rooftop PV capacity; energy from the grid; energy price, and consumers demand. The model helps policy makers assess the potential community energy trading behavior in P2P energy trading.
Ανάπτυξη προηγμένου πληροφοριακού συστήματος κατά DevOps για την διεργασία εισαγωγής ασθενών σε κέντρο υγείας
Creators: name: Τουμλελής, Παύλος-Νικόλαος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Πληροφοριακό σύστημα
subject: Devops
subject: Κέντρο υγείας
subject: Υπηρεσιοστρεφής αρχιτεκτονική
subject: Ευέλικτη μεθοδολογία
subject: Scrum
subject: Πρωτοβάθμια φροντίδα υγείας
subject: Ηλεκτρονική υγεία
subject: Τηλεϊατρική
subject: Ποιότητα υπηρεσιών υγείας
subject: Είσοδος ασθενών σε κέντρο υγείας
subject: Ραντεβού ασθενών
subject: Τακτικό ραντεβού
subject: Έκτακτο ραντεβού
subject: Ασθενοφόρο όχημα

description: Το τελευταίο διάστημα, είναι υψίστης σημασίας κάθε οργανισμός να διαθέτει ένα σύγχρονο πληροφοριακό σύστημα που να εστιάζει στη δομή και τους εργαζόμενούς του. Η ανάγκη για γρήγορη προσαρμοστικότητα, παραγωγικές πρακτικές, ταχύτατη ανταπόκριση στις απαιτήσεις των πελατών και λιγότερη γραφειοκρατία, έφεραν στο προσκήνιο την ανάπτυξη των ευέλικτων μεθόδων (Agile Methodology) οι οποίες παρέχουν τη δομή και τη μεθοδολογία για την ανάπτυξη λογισμικού. Στην παρούσα εργασία, δίνεται μεγαλύτερη έμφαση στην υιοθέτηση του DevOps που παρέχει τις πρακτικές και τα εργαλεία για την αυτοματοποίηση και ολοκλήρωση των διαδικασιών ανάπτυξης και παράδοσης του λογισμικού πληροφοριακού συστήματος, με βασική προτεραιότητα τη μέγιστη ικανοποίηση του πελάτη. Παράλληλα, παρατίθεται ανάλυση των κέντρων υγείας ως μία μορφή παροχής ιατρικής περίθαλψης η οποία είναι στελεχωμένη με γενικούς ιατρούς και ιατρούς ορισμένων ειδικοτήτων που προσφέρουν βασικές υπηρεσίες φροντίδας όπως η πραγματοποίηση προληπτικών εξετάσεων, η διεξαγωγή διαγνωστικής διαδικασίας και η καταλληλότερη θεραπευτική αγωγή για τον ασθενή. Στο αρχικό τμήμα της παρούσας εργασίας, περιγράφονται περαιτέρω οι ανωτέρω έννοιες, ενώ στη συνέχεια αναλύονται οι τρόποι με τους οποίους εισέρχονται οι ασθενείς σε ένα κέντρο υγείας και επίσης παρουσιάζεται ένα πληροφοριακό σύστημα, το οποίο έχει ως βάση το DevOps, για την διαχείριση της εισόδου σε αυτό και των ραντεβού τους.
Ist die Theologie der Befreiung Evangeliumsgemäß oder ideologisch?
Creators: name: Scannone, Juan C.
Publisher: name: Concilium
Year: 1970

description: Concilium, Bd. 10 Nr. 3 (1974): Concilium: Internationale Zeitschrift für Theologie, Band 10, Heft 3
Performance analysis of the Kahan-enhanced scalar product on current multi- and manycore processors
Creators: name: Hofmann, Johannes
name: Fey, Dietmar
name: Riedmann, Michael
name: Eitzinger, Jan
name: Hager, Georg
name: Wellein, Gerhard
Publisher: name: arXiv
Year: 2016
Subjects: subject: Performance (cs.PF)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: We investigate the performance characteristics of a numerically enhanced scalar product (dot) kernel loop that uses the Kahan algorithm to compensate for numerical errors, and describe efficient SIMD-vectorized implementations on recent multi- and manycore processors. Using low-level instruction analysis and the execution-cache-memory (ECM) performance model we pinpoint the relevant performance bottlenecks for single-core and thread-parallel execution, and predict performance and saturation behavior. We show that the Kahan-enhanced scalar product comes at almost no additional cost compared to the naive (non-Kahan) scalar product if appropriate low-level optimizations, notably SIMD vectorization and unrolling, are applied. The ECM model is extended appropriately to accommodate not only modern Intel multicore chips but also the Intel Xeon Phi "Knights Corner" coprocessor and an IBM POWER8 CPU. This allows us to discuss the impact of processor features on the performance across four modern architectures that are relevant for high performance computing.
description: 15 pages, 10 figures
title: Tate motives on Witt vector affine flag varieties
Creators: name: Richarz, Timo
name: Scholbach, Jakob
Publisher: name: Springer International Publishing
Year: 2024

description: Relying on recent advances in the theory of motives we develop a general formalism for derived categories of motives with Q-coefficients on perfect ∞-prestacks. We construct Grothendieck’s six functors for motives over perfect (ind-)schemes perfectly of finite presentation. Following ideas of Soergel–Wendt, this is used to study basic properties of stratified Tate motives on Witt vector partial affine flag varieties. As an application we give a motivic refinement of Zhu’s geometric Satake equivalence for Witt vector affine Grassmannians in this set-up.
title: Η πρόβλεψη της ζήτησης στην εφοδιαστική αλυσίδα καυσίμων
title: Demand forecasting for fuel supply chain
titleType: AlternativeTitle
Creators: name: Κωνσταντάτος Χονδρομάρας, Γεράσιμος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Πρόβλεψη ζήτησης
subject: Εφοδιαστική αλυσίδα καυσίμων

description: Η αλυσίδα εφοδιασμού των καυσίμων παίζει έναν πολύ σημαντικό ρόλο στην οικονομία και στην οικονομική ανάπτυξη, ενώ η πρόβλεψη της ζήτησης των καυσίμων οδηγεί στην βελτίωση της λειτουργίας της αλυσίδας εφοδιασμού. Η σωστή πρόβλεψη της ζήτησης μπορεί να οδηγήσει στη μείωση των αποθεμάτων, στην καλύτερη οργάνωση της παραγωγής και εν γένει στη μείωση του κόστους. Με την παρούσα διπλωματική εργασία επιχειρείται μια ανάλυση της εφοδιαστικής αλυσίδας των καυσίμων και η μελέτη κάθε σταδίου της αλυσίδας. Στη συνέχεια αναλύεται ο ρόλος των προβλέψεων στην εφοδιαστική αλυσίδα και γίνεται μια ενδελεχής ανάλυση της ζήτησης και των χαρακτηριστικών της. Παρουσιάζονται τα σφάλματα πρόβλεψης της ζήτησης και γίνεται ανάλυση βασικών στατιστικών μεθόδων πρόβλεψης. Εν συνεχεία εξετάζονται τα χαρακτηριστικά της ζήτησης των καυσίμων και αναλύονται τα προβλήματα που δημιουργούνται στην εφοδιαστική αλυσίδα των καυσίμων από τα σφάλματα πρόβλεψης. Τέλος αναλύονται οι εφοδιαστικές αλυσίδες των καυσίμων στις ΗΠΑ και στη Ελλάδα και παρουσιάζεται η μοντελοποίηση των προβλέψεων της ζήτησης της βενζίνης στις ΗΠΑ και της ζήτησης της αμόλυβδης βενζίνης και diesel στην Ελλάδα.
Tariff Design and Economic Dispatch in a DC Microgrid
Creators: name: Ferreira Torres, P.
name: Tavares Pinho, J.
name: Zilles, R.
Publisher: name: WIP
Year: 2021
Subjects: PV Applications, Integration and Storage
Storage

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1452-1458
description: A cost allocation methodology for prosumers in a DC microgrid is proposed in this paper, based on the distribution of internal microgrid losses, energy cost and microgrid operator required income. Furthermore, an optimal economic dispatch problem is formulated to reduce overall microgrid energy acquisition costs and is solved using a meta-heuristic algorithm. The proposed approach is generic and considers different types of internal DC microgrid agents: consumers, independent producers and prosumers with behind-the-meter storage and/or generation; the microgrid connection to the main AC distribution grid is also considered in the model. The theoretical framework proposed in this paper aims to incentivize optimal energy management of flexible resources in a multi-agent DC microgrid, while is simple enough to be used as a reference in practical internal tariff designs for DC microgrids. The simulation results for a 48 V, six-node microgrid, indicate the effectiveness of both cost allocation and economic dispatch methodologies.
Electrodynamics and spacetime geometry I: Foundations
Creators: name: Cabral, Francisco
name: Lobo, Francisco S. N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explore the intimate connection between spacetime geometry and electrodynamics. This link is already implicit in the constitutive relations between the field strengths and excitations, which are an essential part of the axiomatic structure of electromagnetism, clearly formulated via integration theory and differential forms. We briefly review the foundations of electromagnetism based on charge and magnetic flux conservation, the Lorentz force and the constitutive relations which introduce the spacetime metric. We then proceed with the tensor formulation by assuming local, linear, homogeneous and isotropic constitutive relations, and explore the physical, observable consequences of Maxwell's equations in curved spacetime. The field equations, charge conservation and the Lorentz force are explicitly expressed in general (pseudo) Riemanian manifolds. The generalized Gauss and Maxwell-Ampère laws, as well as the wave equations, reveal potentially interesting astrophysical applications. In all cases new electromagnetic couplings and related phenomena are induced by spacetime curvature. The implications and possible applications for gravity waves detection are briefly addressed. At the foundational level, we discuss the possibility of generalizing the vacuum constitutive relations, by relaxing the fixed conditions of homogeneity and isotropy, and by assuming that the symmetry properties of the electro-vacuum follow the spacetime isometries. The implications of this extension are briefly discussed in the context of the intimate connection between electromagnetism and the geometry (and causal structure) of spacetime.
description: 21 pages
An Assessment on Determinants of Dry Port Performance: the Case of Modjo Dry Port
Creators: name: Mussema, Abdurezak
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: Since the independency of Eritrea in 1991, Ethiopia became landlocked. As a result, the country has been compelled to use neighbor countries for its imports and exports. In order to ease some of the problems in the transit countries, Ethiopia has started constructing dry ports in its hinterland along the transit corridors. Among the planned dry ports, Modjo and Semera dry ports have become operational. To reap the maximum benefit from those dry ports, the efficient and effective performance of the dry ports is very crucial and to do that it is important to identify factors which influence the performance of dry ports. Therefore, this study tried to examine factors that influence the performance of dry ports from port users perceptions. This paper assess on determinants of dry port performance. Primary data was collected from 63 sample customers of the port which are selected based on convenience sampling technique. The data was collected using questionnaire and the data was analyzed using descriptive statistics. The result of the analysis indicated that, cargo handling equipment, customs operations, port infrastructure, size of dry port, port staff, reliability of port operations and quality of logistics service are found to be important factors in determining the performance of Modjo dry port. Based on the findings of the study it were recommended that investment in container handling equipment and other port infrastructure, improvement in efficiency of customs operations, expansion of port area, employing adequate skilled port staff and improving the reliability and quality of logistics service of the ports are important Key words: dry port, performance, determinants, customers
Effect of Energy Storage on Self-Consumption and Self-Sufficiency: A Field Study in a Nordic Climate
Creators: name: Ollas, P.
name: Persson, J.
name: Kovács, P.
Publisher: name: WIP
Year: 2021
Subjects: PV Applications, Integration and Storage
Storage

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1459-1463
description: This paper examines the variation in self-consumption and self-sufficiency for eight residential-size solar photovoltaic systems under Nordic climate conditions. The work uses measured photovoltaic array performances with a 30-second temporal resolution and is evaluated for a full year’s operation. One of the systems is operated with battery storage to examine the effect on the system’s self-consumption and self-sufficiency, where the simulated load profile is taken from a single-family residential building in Sweden. The results show a consistent negative correlation between array size and self-consumption. The relation between array size and self-sufficiency is more sensitive and is also affected by the mix of PV technologies represented in the test. Adding battery storage increases the self-consumption in the range of 0-30 percentage points weekly. Furthermore, the variation of self-consumption and self-sufficiency follow the seasonal variation in solar resource and load size and illustrate the battery’s eventual redundancy in the winter when the battery’s objective function is to maximize self-consumption.
Button Engine Works product description and testimonials
Creators: name: Button, L.
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: Advertising--Automobiles
valueUri: http://id.worldcat.org/fast/797529
subject: Steam-engines
valueUri: http://id.worldcat.org/fast/1132354
subject: Fire engines
valueUri: http://id.worldcat.org/fast/925305

description: Product descriptions of three classes of steam fire engines manufactured by Button Engine Works in Waterford, Saratoga County, N.Y. Includes testimonials of these products used by various Fire Departments, mostly from the United States. Front page has an illustration of a steam fire engine, an address by L. Button and some hand-written calculations of prices.
Effect of motivation on employee performance: A case study in commercial bank of Ethiopia north Addis Ababa district city branches
Creators: name: Muluken, Feleke
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: Employee's motivation is crucial for any business to survive and prosper in today's competitive business world. Realizing this, the main aim of this research was to analyze the effect of motivation on employee performance in the case of commercial bank of Ethiopia north Addis Ababa district city branches with the motivational dimensions of enhanced salary, mortgage loan, car loan, fringe benefits, promotion, recognition, and working environment. The study used primary and secondary data sources. Simple random sampling technique and purposive samplings were employed. Questionnaire was designed to collect relevant data from the selected 125 respondents 120 questionnaires were completed and analyzed. Both descriptive and inferential analytical techniques were used. Statistical Programme of Social Science (SPSS) version 20 tool was used to generate data that was presented in tables as was necessary. The multiple regressions result indicated that all the independent variables had positive relation and significant effect on employee performance. Correlation analysis also used in this study based on this, all variables had positive relationship with employee performance. The regression result showed that the independent variables used in the study explain 86% variability on employee performance. The study concluded that all the independent variables such as enhanced salary, mortgage loan, car loan, fringe benefits, promotion, recognition, and working environment had positive relation and significant effect on employee performance. Finally, recommendation forwarded as all the independent variables have positive relation and significant effect on employee performance the bank needs to work on these motivational variables continuously and consistently with a due attention to attract, motivate, satisfy and retain its staffs as this works directly proportional to the employee performance which is the base for the bank to prosper and to be a leading competitive bank in the industry.
On the Number of Reflexive and Shared Nearest Neighbor Pairs in One-Dimensional Uniform Data
Creators: name: Bahadır, Selim
name: Ceyhan, Elvan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: For a random sample of points in $\mathbb{R}$, we consider the number of pairs whose members are nearest neighbors (NN) to each other and the number of pairs sharing a common NN. The first type of pairs are called reflexive NNs whereas latter type of pairs are called shared NNs. In this article, we consider the case where the random sample of size $n$ is from the uniform distribution on an interval. We denote the number of reflexive NN pairs and the number of shared NN pairs in the sample as $R_n$ and $Q_n$, respectively. We derive the exact forms of the expected value and the variance for both $R_n$ and $Q_n$, and derive a recurrence relation for $R_n$ which may also be used to compute the exact probability mass function of $R_n$. Our approach is a novel method for finding the pmf of $R_n$ and agrees with the results in literature. We also present SLLN and CLT results for both $R_n$ and $Q_n$ as $n$ goes to infinity.
Letter from Alex Lavdovsky to Martin Segger, copied to Karl Spreitz by Herbert Siegner; encl. "Proof for Karl" by Herbert Siebner
Creators: name: Siebner, Herbert, 1925-
name: Lavdovsky, Alex
Publisher: name: University of Victoria Libraries
Year: 2021
Subjects: subject: Spreitz, Karl, 1927-2016
valueUri: http://id.worldcat.org/fast/2013151
subject: Segger, Martin

description: Letter from Alex Lavdovsky to Martin Segger, requesting his contribution to new Limners book as art historian. He mentions Karl Spreitz as Artistic Editor-in-Chief and Photo-illustrator. Letter is copied to Spreitz from Herbert Siebner. Siebner encloses print titled "Proof for Karl" by Herbert Siebner. Print depicts Siebner's head and shoulders, with painting in background, in sepia ink. In blue ink, Siebner has drawn curly hair, a cigar, and a smoke cloud around the painting. "Geruchte Macher" is written beneath.
Impact of Measurement Data Time Resolution on Predicted Lifetime of PV Inverters in Residential Solar Panel Systems
Creators: name: Alavi, O.
name: Van De Sande, W.
name: Van Cappellen, L.
name: Daenen, M.
Publisher: name: WIP
Year: 2021
Subjects: PV Applications, Integration and Storage
Power Electronics and Electrical Grid Integration

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1445-1448
description: The reliability of grid-tied PV inverters without integrated battery is compared with AC/DC-coupled PV- battery systems while varying the time resolution of the load and mission profiles (1 min – 60 min). Adding a battery increases self-consumption and can lower the needed grid power capacity in both DC- and AC-coupled configurations. A comparison between a battery-free PV system and a grid-tied PV-battery system shows that adding a battery to the system will not only improve the energy performance of the system but also increase the lifetime of the inverter (~15% in DC-coupled structure). The results have been extracted for two cases: (a) varying both mission profile and load profile resolutions, (b) varying the available load profile time resolution while keeping the mission profile time resolution constant at 1 min. The obtained results show that in our case, the influence of mission profile time resolution is greater than the input of load data. However, the expected PV inverter lifetime does not differ much for different time resolutions. This can highlight the importance of using measurement data with a resolution of even less than 1 minute because higher IGBT junction temperature swings can happen in a few seconds which cannot be seen in lower time resolutions.
Ball Convex Bodies in Minkowski Spaces
Creators: name: Jahn, Thomas
name: Richter, Christian
name: Martini, Horst
Publisher: name: arXiv
Year: 2016
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 46B20, 52A01, 52A20, 52A21, 52A35

description: The notion of ball convexity, considered in finite dimensional real Banach spaces, is a natural and useful extension of usual convexity; one replaces intersections of half-spaces by suitable intersections of balls. A subset $S$ of a normed space is called ball convex if it coincides with its ball hull, which is obtained as intersection of all balls (of fixed radius) containing $S$. Ball convex sets are closely related to notions like ball polytopes, complete sets, bodies of constant width, and spindle convexity. We will study geometric properties of ball convex bodies in normed spaces, for example deriving separation theorems, characterizations of strictly convex norms, and an application to complete sets. Our main results refer to minimal representations of ball convex bodies in terms of their ball exposed faces, to representations of ball hulls of sets via unions of ball hulls of finite subsets, and to ball convexity of increasing unions of ball convex bodies.
Reliability Analysis Framework for a Grid-Tied PV-Battery System: Influence of PV and Battery Degradation on Reliability of Power Electronic Systems
Creators: name: Alavi, O.
name: Van De Sande, W.
name: Van Cappellen, L.
name: De Ceuninck, W.
name: Daenen, M.
Publisher: name: WIP
Year: 2021
Subjects: PV Applications, Integration and Storage
Power Electronics and Electrical Grid Integration

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1449-1451
description: This paper presents a flexible framework to evaluate the reliability of power electronic systems used within a grid-connected PV-battery system. As a practical example to show the capability of this framework, the life consumption (LC) of power semiconductors (IGBTs and diodes) is determined considering both solar panel and lithium-ion battery degradation. Different panel degradation rates can be defined to the framework. The battery degradation is calculated by a closed-loop approach so that the battery degradation is adjusted based on the determined cycling and calendar aging. The outputs are obtained for three cases: (1) no degradation, (2) only PV degradation, and (3) both PV and battery degradation. The results showed that by considering the battery degradation, the battery DC-DC converter’s switches will experience 14% lower LC compared to the case with both PV and battery degradation models, while the switches within the PV inverter have 2.3% higher LC when considering the battery degradation.