cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Use of Magnetic Board Components for Rapid Prototyping and Evaluation of Optical Elements in CPV Systems
Creators: name: Gomez-Gonzalez, E.
name: Coronado, R.
name: Perales-Esteve, M.A.
name: Marquez-Rivas, J.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
Terrestrial Concentrator Systems

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 435-437
description: In this paper we present a simple and effective system for design and experimental evaluation of concentration photovoltaic (PV) optical prototypes. It is based on the combined use of conventional and user-specific plastic models of planar sections of optical elements and light sources on a magnetic board. Refracted, reflected and transmitted ray trajectories are easily visualized. Precise measurements of angles and distances can be taken with conventional measuring instruments. Geometrical concentration ratio, angular acceptance and alignment of elements can be effectively measured, being easy to implement and cost-effective.
The Analysis on Installation and Application Scheme of Dispersed Mega Watt Photovoltaic System in Korea
Creators: name: Hwang, H.-M.
name: So, J.H.
name: Kim, K.-S.
name: Yu, G.J.
Publisher: name: WIP-Munich
Year: 2008
Subjects: PV Systems
Grid-connected Applications

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3436-3439
description: This paper presents the case study about the Mega Watt photovoltaic system in Korea. According to the recent international situation and increased oil cost, requests and interests of PV system were much large as compared with the former day in Korea. So we simulated the MW photovoltaic system (centralized and dispersed type) and especially the dispersed photovoltaic system, which is suitable to PV systems in urban installation site, and we can verify the applicability of dispersed mega watt photovoltaic systems on high voltage electrical customers.
Slider Thickness Promotes Lubricity: from 2D Islands to 3D Clusters
Creators: name: Guerra, Roberto
name: Tosatti, Erio
name: Vanossi, Andrea
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The sliding of three-dimensional clusters and two-dimensional islands adsorbed on crystal surfaces represent an important test case to understand friction. Even for the same material, monoatomic islands and thick clusters will not as a rule exhibit the same friction, but specific differences have not been explored. Through realistic molecular dynamics simulations of the static friction gold on graphite, an experimentally relevant system, we uncover as a function of gold thickness a progressive drop of static friction from monolayer islands, that are easily pinned, towards clusters, that slide more readily. The main ingredient contributing to this thickness-induced lubricity appears to be the increased effective rigidity of the atomic contact, acting to reduce the cluster interdigitation with the substrate. A second element which plays a role is lateral contact size, which can accommodate the solitons typical of the incommensurate interface only above a critical contact diameter, which is larger for monolayer islands than for thick clusters. The two effects concur to make clusters more lubric than islands, and large sizes more lubric than smaller ones. These conclusions are expected to be of broader applicability in diverse nanotribological systems, where the role played by static, and dynamic, friction is generally quite important.
description: Nanoscale, 2016
Role of the gut microbiota in the pathogenesis of coeliac disease and potential therapeutic implications
Creators: name: Akobeng, Anthony K.
name: Singh, Parul
name: Kumar, Manoj
name: Khodor, Souhaila Al
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: Nutrition and dietetics

description: Purpose Although genetic predisposition and exposure to dietary gluten are considered necessary triggers for the development of coeliac disease, alterations in the gut microbial composition may also contribute towards the pathogenesis of coeliac disease. This review aims to provide an overview of the available data on the potential mechanisms through which the gut microbiota plays a role in the causation of coeliac disease and to discuss the potential therapeutic strategies that could diminish the consequences of microbial dysbiosis. Method A search of the literature was performed using the PubMed, Embase, and JSTOR databases; relevant articles were included. Results Recent studies in patients with coeliac disease have reported an increase in the relative amounts of gram negative bacterial genera such as Bacteroides, Prevotella, and Escherichia, and reduced amounts of protective anti-inflammatory bacteria such as Bifidobacteria and Lactobacilli. Dysbiotic microbiota may lead to a dysregulated immune response that may contribute to the pathogenesis of coeliac disease. In infancy, antibiotic use and certain infant feeding practices may lead to alterations in the developing gut microbiota to influence the immune maturation process and predispose to coeliac disease. Conclusion The induction of the intestinal immune system and gluten intolerance may be influenced by the relative abundance of certain microbiota. Factors such as infant feeding practices, diet, antibiotics, and infections, may be involved in the development of coeliac disease due to their influence on gut microbial composition. The efficacy of potential modulators of the gut microbiota such as probiotics, prebiotics, and fecal microbial transplant as adjunctive treatments to gluten-free diet in coeliac disease is unproven and requires further investigation.Other Information Published in: European Journal of Nutrition
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s00394-020-02324-y
title: On the Feasibility of Assessing Social Situations Using Ecological Momentary Assessment – A Comparison Between Singapore and German Test Participants
Creators: name: Schinkel-Bielefeld, Nadja
name: Lee, Zu Xuan
name: Cho Cho Thein, Khine
name: Martin, Jennifer
name: Stasiak, Sonia
Publisher: name: Publishing House of Poznan University of Technology
Year: 2022

description: Vibrations in Physical Systems, 33(1), 2022109-1 - 2022109-8
Clinical registries to evaluate the patterns of care and outcomes of patients diagnosed with upper tract urothelial carcinoma
Creators: name: KEALEY, JOSHUA LUKE
Publisher: name: Monash University
Year: 2023
Subjects: classificationCode: 321104
subject: Cancer therapy (excl. chemotherapy and radiation therapy)
classificationCode: 321102
subject: Cancer diagnosis

description: This thesis analyses the use of registries in patients diagnosed with cancer of the lining of the kidneys and ureter and creates an online registry to efficiently analyse how patients are treated, their outcomes and where improvements in care are possible. It uses the developed registry to analyse a large cohort of patients who were previously diagnosed with this cancer to determine how they were evaluated and treated and if improvements to care are possible. It goes on to initiate the registry use across multiple health sites in Australia to better understand the patterns of care.
Additional file 1 of Mentoring is in the ‘I’ of the beholder: supporting mentors in reflecting on their actual and preferred way of mentoring
Creators: name: Loosveld, Lianne M.
name: Driessen, Erik W.
name: Vanassche, Eline
name: Artino, Anthony R.
name: Van Gerven, Pascal W. M.
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1.
Additional file 1 of Telerehabilitation for upper limb disabilities: a scoping review on functions, outcomes, and evaluation methods
Creators: name: Moulaei, Khadijeh
name: Sheikhtaheri, Abbas
name: Nezhad, Mansour Shahabi
name: Haghdoost, AliAkbar
name: Gheysari, Mohammad
name: Bahaadinbeigy, Kambiz
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1: Appendix A. The keywords and searchstrategies used in the PubMed and Web of Science databases are listed in Table1. Table1. Keywords and searchstrategy. Appendix B. Overview of the functionalities and facilitiesof telerehabilitation systems presented in the studies. Appendix C. Evaluationsand a summary of reported outcomes in the included studies.
Wave-shape Function Model Order Estimation by Trigonometric Regression
Creators: name: Ruiz, Joaquin
name: Colominas, Marcelo A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The adaptive non-harmonic (ANH) model is a powerful tool to compactly represent oscillating signals with time-varying amplitude and phase, and non-sinusoidal oscillating morphology. Given good estimators of instantaneous amplitude and phase we can construct an adaptive model, where the morphology of the oscillation is described by the wave-shape function (WSF), a 2π-periodic more general periodic function. In this paper, we address the problem of estimating the number of harmonic components of the WSF, a problem that remains underresearched, by adapting trigonometric regression model selection criteria into this context. We study the application of these criteria, originally developed in the context of stationary signals, to the case of signals with time-varying amplitudes and phases. We then incorporate the order estimation to the ANH model reconstruction procedure and analyze its performance for noisy AM-FM signals. Experimental results on synthethic signals indicate that these criteria enable the adaptive estimation of the waveform of non-stationary signals with non-sinusoidal oscillatory patterns, even in the presence of considerable amount of noise. We also apply our reconstruction procedure to the task of denoising simulated pulse wave signals and determine that the proposed technique performs competitively to other denoising schemes. We conclude this work by showing that our adaptive order estimation algorithm takes into account the interpatient waveform variability of the electrocardiogram (ECG) and respiratory signals by analyzing recordings from the Fantasia Database.
Fully Adaptive Time-Varying Wave-Shape Model: Applications in Biomedical Signal Processing
Creators: name: Ruiz, Joaquin
name: Schlotthauer, Gastón
name: Vignolo, Leandro
name: Colominas, Marcelo A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this work, we propose a time-varying wave-shape extraction algorithm based on a modified version of the adaptive non-harmonic model for non-stationary signals. The model codifies the time-varying wave-shape information in the relative amplitude and phase of the harmonic components of the wave-shape. The algorithm was validated on both real and synthetic signals for the tasks of denoising, decomposition and adaptive segmentation. For the denoising task, both monocomponent and multicomponent synthetic signals were considered. In both cases, the proposed algorithm can accurately recover the time-varying wave-shape of non-stationary signals, even in the presence of high levels of noise, outperforming existing wave-shape estimation algorithms and denoising methods based on short-time Fourier transform thresholding. The denoising of an electroencephalograph signal was also performed, giving similar results. For decomposition, our proposal was able to recover the composing waveforms more accurately by considering the time variations from the harmonic amplitude functions when compared to existing methods. Finally, the algorithm was used for the adaptive segmentation of synthetic signals and an electrocardiograph of a patient undergoing ventricular fibrillation.
Effects of N-H Related Complexes on Electrical Property of GaAsN Films Grown by Chemical Beam Epitaxy
Creators: name: Suzuki, H.
name: Nishimura, K.
name: Bouzaz, B.
name: Kojima, N.
name: Ohshita, Y.
name: Yamaguchi, M.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
Fundamental Studies

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 438-440
description: The electrical behavior of the N-H related complex in GaAsN films grown by CBE were investigated by comparing with N-H concentration ([N-H]) and acceptor concentration. Structures of the N-H defects were evaluated by absorption peak position of local vibration modes. Several peaks originated from N-H stretch mode were observed around at 3125, 3098, 3010 and 2952 cm–1. The integrated absorption intensity (IA) of N-H peaks except the peak at 3125 cm–1 had almost liner to H concentration ([H]). On contrary, IA at 3125 cm–1 had sub-liner relationship to [H] suggesting that the defect contained other factor. In the samples grown at the same temperature, the acceptor concentrations were in proportional with [N-H]. Therefore, it was concluded that N-H related complexes mainly behave as acceptors in GaAsN films grown by CBE. The slope decreased with decreasing growth temperature. This suggests that N-H bond connected with another defect such as vacancy, interstitial and impurity atom and then act as an acceptor.
Assembly of nothing: Equilibrium fluids with designed structured porosity
Creators: name: Lindquist, Beth A.
name: Jadrich, Ryan B.
name: Truskett, Thomas M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Controlled micro- to meso-scale porosity is a common materials design goal with possible applications ranging from molecular gas adsorption to particle size selective permeability or solubility. Here, we use inverse methods of statistical mechanics to design an isotropic pair interaction that, in the absence of an external field, assembles particles into an inhomogeneous {\em fluid} matrix surrounding pores of prescribed size ordered in a lattice morphology. The pore size can be tuned via modification of temperature or particle concentration. Moreover, modulating density reveals a rich series of microphase-separated morphologies including pore- or particle-based lattices, pore- or particle-based columns, and bicontinuous or lamellar structures. Sensitivity of pore assembly to the form of the designed interaction potential is explored.
description: 8 pages, 7 figures
Application of the MotherPV Method to the Accurate Monitoring of the Grid-Connected Photovoltaic Systems
Creators: name: Guérin De Montgareuil, A.
name: Mezzasalma, F.
name: Merten, J.
Publisher: name: WIP-Munich
Year: 2008
Subjects: PV Systems
Grid-connected Applications

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3430-3435
description: INES / CEA has developed the MotherPV method (Meteorogical, Optical and Thermal Histories for the Energy Rating of PhotoVoltaics) allowing the accurate characterization of the performance of photovoltaic modules. This method has been extended in order to allow the monitoring of the performance of photovoltaic systems, resulting in the MotherPV SYST method. The MotherPV SYST method observes the behaviour of the DC part of the system and the inverter’s behaviour. For the DC part of the system, module knowlege may be used to determine if the system behaviour is correct. For the inverter’s part, the dynamic behaviour of the inverter has to be taken into account. The method allows the detection of out-of-range behaviour of the system, leading to an efficient monitoring. It is hoped that next improvements of the method will allow the observation of system ageing.
How galactic environment regulates star formation
Creators: name: Meidt, Sharon E.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In a new simple model I reconcile two contradictory views on the factors that determine the rate at which molecular clouds form stars -- internal structure vs. external, environmental influences -- providing a unified picture for the regulation of star formation in galaxies. In the presence of external pressure, the pressure gradient set up within a self-gravitating isothermal cloud leads to a non-uniform density distribution. Thus the local environment of a cloud influences its internal structure. In the simple equilibrium model, the fraction of gas at high density in the cloud interior is determined simply by the cloud surface density, which is itself inherited from the pressure in the immediate surroundings. This idea is tested using measurements of the properties of local clouds, which are found to show remarkable agreement with the simple equilibrium model. The model also naturally predicts the star formation relation observed on cloud scales and, at the same time, provides a mapping between this relation and the closer-to-linear molecular star formation relation measured on larger scales in galaxies. The key is that pressure regulates not only the molecular content of the ISM but also the cloud surface density. I provide a straightforward prescription for the pressure regulation of star formation that can be directly implemented in numerical models. Predictions for the dense gas fraction and star formation efficiency measured on large-scales within galaxies are also presented, establishing the basis for a new picture of star formation regulated by galactic environment.
description: 18 pages, 7 figures, accepted for publication in ApJ
The Influence of Corona Charging on the Si/SiO2 Interface
Creators: name: Zhang, C.
name: Jin, H.
name: Jellett, W.E.
name: Weber, K.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
Fundamental Studies

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 261-264
description: In addition to charge deposition, corona charging also results in modification of Si surface electronic properties. Additional defects at the Si-SiO2 interface introduced by corona charging can be subsequently removed by Rapid thermal anneals. It has been suggested that atomic hydrogen may be generated by the corona charging process, and responsible for the observed interface changes. Both lifetime and Capacitance-Voltage measurements strongly suggest that
hydrogen has been introduced to the interface. This is confirmed by Raman measurements, which show an increase in the concentration of molecular hydrogen in the Si bulk in the near-interface region.
Simulation of MWT-Solar Cells Using a Multi 2D Circuit Calculation Tool Based on SPICE
Creators: name: Kubera, T.
name: Clement, F.
name: Grote, D.
name: Thaidigsmann, B.
name: Biro, D.
name: Warta, W.
name: Preu, R.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
Fundamental Studies

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 430-434
description: The development of new concepts for silicon solar cells has shown promising results in recent years. Especially rear-contact cells become more and more attractive for cell manufactures. One of these concepts is the MWT (metal wrap through)-concept that allows new beneficial contact arrangements on the front and rear side of the cells whereat specific electrical effects have to be considered. Referring to this a special simulation tool was realized in order to compare different cell designs and calculate the electrical behavior of MWT-cells. The tool is based on SPICE which is successfully used for various cell simulations as well [1], [2], [3]. The presented tool allows an enhanced network assembly for complex cell structures by using digital images reflecting the cell structure.
On shadowing and hyperbolicity for geodesic flows on surfaces
Creators: name: Bessa, Mario
name: Torres, Maria Joana
name: Dias, Joao Lopes
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We prove that the geodesic flow on closed surfaces displays a hyperbolic set if the shadowing property holds C2-robustly on the metric. Similar results are obtained when considering even feeble properties like the weak shadowing and the specification properties. Despite the Hamiltonian nature of the geodesic flow, the arguments in the present paper differ completely from those used in [5] for Hamiltonian systems.
description: 12 pages, 1 figure
Master integrals for splitting functions from differential equations in QCD
Creators: name: Gituliar, O.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A method for calculating phase-space master integrals for the decay process $1 \to n$ massless partons in QCD using integration-by-parts and differential equations techniques is discussed. The method is based on the appropriate choice of the basis for master integrals which leads to significant simplification of differential equations. We describe an algorithm how to construct the desirable basis, so that the resulting system of differential equations can be recursively solved in terms of (G)HPLs as a series in the dimensional regulator $ε$ to any order. We demonstrate its power by calculating master integrals for the NLO time-like splitting functions and discuss future applications of the proposed method at the NNLO precision.
description: 18 pages, 3 figures; v2: revised Introduction and Bibliography
Fundamental Study on Scheduling of Generation Output from Large-Scale PV Generation Plant
Creators: name: Akatsuka, M.
name: Hara, R.
name: Kita, H.
name: Ito, T.
name: Suzuki, S.
name: Miwa, S.
name: Matsuno, N.
Publisher: name: WIP-Munich
Year: 2008
Subjects: PV Systems
Grid-connected Applications

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3409-3411
description: Demonstrative project named “Verification of Grid Stabilization with Large-scale PV Power Generation“ has been conducted at Wakkanai city and Hokuto city in Japan by New Energy and Industrial Technology Development Organization (NEDO). In Wakkanai PV power station, Sodium-Sulfur battery system is
introduced to realize some functions. Since MW-class PV systems are expected to use as the power station, it is important to develop a scheduled operation method. This paper proposes a scheduling method based on the PV output monitored online and statistical nature of daily PV generation output.. Effectiveness of the proposed method is ascertained through some computational simulation using the actual PV generation data.
Suplementary data for Utilizing MinION Nanopore Oxford Technology for Long-read Sequencing from Genomic DNA of Parashorea lucida subbmited BMC Research Note
Creators: name: Tauhida, Nita
Publisher: name: figshare
Year: 2022
Subjects: subject: Biotechnology
subject: Molecular Biology
subject: Plant Biology
subject: FOS: Biological sciences

description: Raw data statistics and plots (quality control, reads length, reads distribution)
Distinct genomic features across cytolytic subgroups in skin melanoma
Creators: name: Roufas, Constantinos
name: Georgakopoulos-Soares, Ilias
name: Zaravinos, Apostolos
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: Oncology and carcinogenesis

description: Background Skin melanoma is a highly immunogenic cancer. The intratumoral immune cytolytic activity (CYT) reflects the ability of cytotoxic T and NK cells to eliminate cancer cells, and is associated with improved patient survival. Despite the enthusiastic clinical results seen in advanced-stage metastatic melanoma patients treated with immune checkpoint inhibitors, a subgroup of them will later relapse and develop acquired resistance. We questioned whether CYT associates with different genomic profiles and thus, patient outcome, in skin melanoma. Methods We explored the TCGA-SKCM dataset and stratified patients to distinct subgroups of cytolytic activity. The tumor immune contexture, somatic mutations and recurrent copy number aberrations were calculated using quanTIseq, MutSigCV and GISTIC2. Chromothriptic events were explored using CTLPScanner and cancer neoepitopes were predicted with antigen garnish. Each tumor's immunophenoscore was calculated using Immunophenogram. Mutational signatures and kataegis were explored using SigProfiler and compared to the known single or doublet base substitution signatures from COSMIC. Results Metastatic skin melanomas had significantly higher CYT levels compared to primary tumors. We assessed enrichment for immune-related gene sets within CYT-high tumors, whereas, CYT-low tumors were enriched for non-immune related gene sets. In addition, distinct mutational and neoantigen loads, primarily composed of C > T transitions, along with specific types of copy number aberrations, characterized each cytolytic subgroup. We found a broader pattern of chromothripsis across CYT-low tumors, where chromosomal regions harboring chromothriptic events, contained a higher number of cancer genes. SBS7a/b, SBS5 and SBS1 were the most prevalent mutational signatures across both cytolytic subgroups, but SBS1 differed significantly between them. SBS7a/b was mutually exclusive with SBS5 and SBS1 in both CYT subgroups. CYT-high patients had markedly higher immunophenoscore, suggesting that they should display a clinical benefit upon treatment with immune checkpoint inhibition therapy, compared to CYT-low patients. Conclusions Overall, our data highlight the existence of distinct genomic features across cytolytic subgroups in skin melanoma, which might affect the patients' relapse rate or their acquisition of resistance to immune checkpoint inhibition therapies.Other Information Published in: Cancer Immunology, Immunotherapy
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s00262-021-02918-3
The Einstein specific heat model for finite systems
Creators: name: Boscheto, E.
name: de Souza, M.
name: López-Castillo, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The theoretical model proposed by Einstein to describe the phononic specific heat of solids as a function of temperature consists the very first application of the concept of energy quantization to describe the physical properties of a real system. Its central assumption lies in the consideration of a total energy distribution among N (in the thermodynamic limit $N \rightarrow \infty$) non-interacting oscillators vibrating at the same frequency ($ω$). Nowadays, it is well-known that most materials behave differently at the nanoscale, having thus some cases physical properties with potential technological applications. Here, a version of the Einstein's model composed of a finite number of particles/oscillators is proposed. The main findings obtained in the frame of the present work are: (i) a qualitative description of the specific heat in the limit of low-temperatures for systems with nano-metric dimensions; (ii) the observation that the corresponding chemical potential function for finite solids becomes null at finite temperatures as observed in the Bose-Einstein condensation and; (iii) emergence of a first-order like phase transition driven by varying $N$.
description: 15 pages, 5 figures, comments are wellcome
Tetralogy of Fallot Will be Treated Interventionally Within Two Decades
Creators: name: Rahmath, Muhammed Riyas K.
name: Boudjemline, Younes
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: Cardiovascular medicine and haematology
Paediatrics

description: Tetralogy of Fallot is considered a prototype congenital heart disease because of its embryological, anatomical, pathophysiological, and management aspects. Current management usually relies on a complete surgical repair that is electively performed between 3 and 6 months of age. With the advances of interventional cardiology especially in the fields of ventricular septal defect closure, stent, and pulmonary valve replacement, the question of complete repair of tetralogy of Fallot by interventional means can be discussed. Tetralogy of Fallot is a complex disease with multiple lesions, all individually amenable to transcatheter treatment. In this article, we will review current status of various aspects of tetralogy of Fallot focusing on interventional aspects, giving insights of what would be the ideal platform of a fully interventional repair.Other Information Published in: Pediatric Cardiology
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s00246-020-02297-z
Investigations of RF Noise Introduced by Photovoltaic Solar Power Generators
Creators: name: Drapalik, M.
name: Schlosser, V.
name: Schmid, J.
name: Bajons, P.
name: Klinger, G.
Publisher: name: WIP-Munich
Year: 2008
Subjects: PV Systems
Grid-connected Applications

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3367-3370
description: We have investigated the a.c. behaviour of crystalline silicon solar cells with abrupt pn-junction doping profiles. From small signal admittance measurements we derived the complex impedance of the solar cell. The low
frequency transfer function up to 1MHz was determined by modelling the circuit of the solar cell connected to an external impedance. Under laboratory conditions we examined the current response of the solar cells connected to an
external impedance caused by periodic light intensity variations or mechanical vibrations with respect to our model calculations. We found that the investigated solar cells act as a low pass filter in the external current loop with a bias voltage dependent bandwidth which can exceed 100 kHz.
Conversion of oil palm waste into value-added products through pyrolysis: a sensitivity and techno-economic investigation
Creators: name: Parthasarathy, Prakash
name: Alherbawi, Mohammad
name: Shahbaz, Muhammad
name: Mackey, Hamish R.
name: McKay, Gordon
name: Al-Ansari, Tareq
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: subject: Environmental engineering
subject: FOS: Environmental engineering

description: In this study, an empirical model for the pyrolysis of major oil palm wastes (OPW) such as palm kernel shell (PKS), empty fruit bunches (EFB), and oil palm frond (OPF), and their blends is developed. Moreover, the techno-economic feasibility of the wastes is investigated to determine the type of waste that would be suitable for the commercialization of different types of products. According to the model results, the bio-oil dominates the pyrolysis process’ product output, accounting for 59.21, 50.51, 56.60, and 55.65% of PKS, EFB, OPF, and their blend, respectively. Whereas biochar yield is 23.21, 23.1, 22.95, and 23.08%, gas yield is 17.57, 26.38, 20.44, and 21.27%. The findings demonstrate that the feedstocks under consideration are mostly suitable for producing bio-oil. According to the economic analysis, PKS-based pyrolysis has the highest capital expenses (CAPEX), while EFB-based pyrolysis has the lowest CAPEX of all tested feedstocks. Furthermore, PKS has the highest operating expenses (OPEX) due to its relatively higher market price as well as higher moisture content, which necessitates more energy input during the drying stage. Among the feedstocks, OPF has delivered the highest profit of USD 17 M/year, with a 22% return on investment (ROI). In terms of investment capital payback period, all OPW feedstocks demonstrated a reasonable period of 4–6 years. Bio-oil is the most valuable pyrolysis product, with the highest market value when compared to biochar and syngas. The established prediction model can be utilized as a solid reference for biomass pyrolysis modelling studies. Furthermore, the predicted values are reasonable enough to be used in industrial process design.Other Information Published in: Biomass Conversion and Biorefinery
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s13399-022-03144-2
Thin Film Modules: Long Term Operational Experience in Mediterranean Climate
Creators: name: Apicella, F.
name: Giglio, V.
name: Pellegrino, M.
name: Ferlito, S.
name: Tanikawa, F.
name: Okamoto, Y.
Publisher: name: WIP-Munich
Year: 2008
Subjects: PV Systems
Grid-connected Applications

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3422-3425
description: ENEA within the frame of R&D and Demonstration Photovoltaic activities, in collaboration with KANEKA, has been continuing the activity already initiated some years ago on monitoring experimental PV plants based on thin film PV modules. The objective of the research is to evaluate first of all the reliability of the modules efficiency in terms of capacity to keep the energy conversion efficiency over long periods and then to test the behaviour of the modules, and the modules structures as well, that have been subjected to the hard marine environment conditions (temperature, corrosion etc.). Two plants of about 1 kWp have been monitoring: the first a-Si single junction modules in operation since June 2002; the second hybrid a-Si/μc-Si modules plant active since January 2006. Data collected after a long term of continuous monitoring are shown and discussed.
Investigation of biomass components on the slow pyrolysis products yield using Aspen Plus for techno-economic analysis
Creators: name: Shahbaz, Muhammad
name: AlNouss, Ahmed
name: Parthasarathy, Prakash
name: Abdelaal, Ali H.
name: Mackey, Hamish
name: McKay, Gordon
name: Al-Ansari, Tareq
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: subject: Environmental engineering
subject: FOS: Environmental engineering

description: Prior information on the pyrolysis product behaviour of biomass components-cellulose, hemicellulose and lignin is critical in the selection of feedstock as components have a significant influence on the pyrolysis products yield. In this study, the effect of biomass components on the yield of slow pyrolysis products (char, bio-oil and syngas) is investigated using a validated ASPEN Plus® model. The model is simulated at a temperature of 450 °C, a heating rate of 10 °C/min and a solid residence time of 30 min. The results indicated that at the given conditions, lignin contributed 2.4 and 2.5 times more char yield than cellulose and hemicellulose. The hemicellulose contributed 1.33 times more syngas yield than lignin while the cellulose and hemicellulose contributed 8.67 times more bio-oil yield than lignin. Moreover, the cost involved in the production of char using lignin (110 $/ton) is significantly economical than using cellulose (285 $/ton) and hemicellulose (296 $/ton). The net CO2 emission of lignin pyrolysis is 4.14 times lower than cellulose pyrolysis and 3.94 times lower than hemicellulose pyrolysis. It can be concluded that lignin pyrolysis is more advantageous than cellulose and hemicellulose pyrolysis. In the selection of feedstock for the slow pyrolysis, the feedstock with more lignin content is preferred. Graphical abstractOther Information Published in: Biomass Conversion and Biorefinery
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s13399-020-01040-1
Investigations on Charge Transfer in Polymer/Nanoparticle Composites for Applications in Solar Cells
Creators: name: Heinemann, D.
name: Von Maydell, K.
name: Lokteva, I.
name: Zutz, F.
name: Kolny-Olesiak, J.
name: Borchert, H.
name: Riedel, I.
name: Parisi, J.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
Fundamental Studies

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 381-384
description: The photoinduced charge transfer in blends of semiconducting polymers and nanoparticles was investigated. As the polymer regioregular poly-hexlythiophene (P3HT) was used. The nanoparticles consist of CdSe and were prepared using a colloidal synthesis. The light-induced charge transfer between the conjugated polymer and CdSe nanoparticles was studied by electron spin resonance spectroscopy with and without light excitation. Upon light excitation a resonant microwave absorption emerges which can be attributed to a positively charged polaron in the polymer. However, no resonance of CdSe-nanoparticles could be detected. This stays in contrast to measurements performed on P3HT/fullerene blends where photoinduced paramagnetic resonances can be clearly distinguished for the polymer cation and the fullerene anion. Additionally, the relaxation of the resonance peaks was investigated.
Starting Points for a New Cultural Vision of BIPV
Creators: name: Scognamiglio, A.
name: Privato, C.
Publisher: name: WIP-Munich
Year: 2008
Subjects: PV Systems
PV Applications in the Built Environment

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3222-3233
description: The new regard of our contemporary culture for energy conservation is influencing the field of Architecture. Photovoltaics is now seen as a smart technology useful to transform buildings into “cool” contemporary energy generators. This new symbolic status of Photovoltaics is creating new architectural and market demands. This makes it more important to bridge the distance between Architecture and Photovoltaics by a better understanding. The
paper represents a contribute to this need. The approach is historical and evolutionary. First a concise account of the past and present relationships between Architecture and Photovoltaics is given. Subsequently, a more detailed account of these relationships is given. The common thread is the effort to identify and clarify the architectural design demands for Photovoltaics. For the likely future evolution architectural images had been translated into technical descriptions, which can serve as starting points for new research in product development suiting the new architectural and market demands.
New Approach For Hybrid PV/H2 System Sizing
Creators: name: Darras, C.
name: Poggi, P.
name: Muselli, M.
Publisher: name: WIP-Munich
Year: 2008
Subjects: PV Systems
Grid-connected Applications

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 3402-3405
description: Our study concerns the electricity supply of a meteorological weather pylon with help of a PV/H2 hybrid system in Cadarache (Aix in Provence, France). The objective was to determine the optimal sizing of the whole system by observing his capacity to answer to the specifications and taking into account the appropriate constraints for the site. This approach has been made via a new numerical sizing code (Matlab language), based on a sequential running time. For the simulation, a good precision of the balance between production and consumption is obtained with a time-step of one hour. This time scale allows neglecting the response time of the various sub-systems. This approximation is realistic because we do not want to get an accurate electrical comportment of the system in real time, but we search to obtain a global evaluation of the energetic balance during the time of each simulation. The system consists of renewable sources of production energy (PV array), energy storage system (H2 chain) and converters which are associated with them. The objective of this program is to define a whole of systems able to satisfy the request of the load.
Rated External Quantum Efficiency of III-V Multijunction Solar Cells
Creators: name: Andreev, V.M.
name: Emelyanov, V.M.
name: Kalyuzhnyy, N.
name: Lantratov, V.
name: Mintairov, S.A.
name: Shvarts, M.Z.
name: Timoshina, N.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
Fundamental Studies

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 375-380
description: Theoretical approaches allowing one to calculate analytically the external quantum efficiency (EQE) of III-V multijunction solar cells with accounting for the interferential phenomena in their structures have been developed. Using these approaches, the spectral characteristics and photocurrents of GaInP/GaAs dual-junction and GaInP/GaAs/Ge triple-junction solar cells have been calculated and studied, which are rather well fitted to the experimental values. In these structures, the diffusion lengths and the surface recombination rates have been determined. The effect of diffusion lengths on the internal quantum efficiency (IQE) of the triple-junction cell subcells has been investigated, and their values, at the increase of which a noticeable gain in IQE does not take place have been determined. The results of the enumerated calculations allow one to estimate characteristics of new cells and, hence, to carry out their optimization. They present also the initial data for development of solar cell electrical models.
Multiple Dye Luminescent Solar Concentrators and Comparison with Monte-Carlo Ray-Trace Predictions
Creators: name: Kennedy, M.
name: Dunne, M.
name: McCormack, S.
name: Doran, J.
name: Norton, B.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
Fundamental Studies

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 390-393
description: A previously developed Monte-Carlo ray-trace model has been modified to incorporate multiple luminescent species. Liquid luminescent solar concentrators (LSCs) have been fabricated to verify the ray-trace predictions for LSCs containing multiple luminescent dyes. Single dye and multiple dye solutions of varying concentrations can be easily prepared and inserted into the experimental liquid LSC setup. In this way, experimental uncertainties, such as reduction in the luminescent quantum yield, can be reduced. Hence, the spectral effects of various single and multiple dyes can be analysed and compared more accurately with ray-trace predictions. Initial results from the liquid LSC characterisation and comparison with model predictions are presented here.
The parallelism of cognitive economy and physiological economy: A rationality-based dual process theory
Creators: name: Khalil, Elias L.
name: Amin, Azzam
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: Applied and developmental psychology

description: Researchers recognize the affinity of habits-as-heuristics and habits-as-routines. This paper argues that the affinity should not be surprising, as both kinds of habits are the outcome of rational choice. The paper finds that the dual process theory, once reconstructed as based on rational choice, reveals that the affinity runs deep, as three-fold parallelism: i) the cognitive economy responsible for habits-as-heuristics parallels what this paper calls the “physiological economy” responsible for habits-as-routines; ii) the occasional slipup of heuristics generated by the cognitive economy parallels the occasional slipup of routines of the physiological economy; and iii) the breakdown of heuristics of the cognitive economy parallels the breakdown of routines of the physiological economy. The rationality-based dual process theory can explain—whereas the single process theory cannot—why slipups do not induce the decision makers to abandon the pertinent habit, but breakdowns do.Other Information Published in: Current Psychology
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s12144-022-03554-5
Intermediate Bands and Non-Radiative Recombination
Creators: name: Tablero, C.
name: Martí Vega, A.
name: Fuertes Marrón, D.
name: Antolín, E.
name: Luque, A.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Advanced Photovoltaics
Fundamental Studies

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 403-406
description: The use of half-filled intermediate band materials has been proposed as a means to implement solar cells with efficiency exceeding that of single gap solar cells. An intermediate band can be regarded, at first, as a mere collection of energy levels within the semiconductor bandgap. However, its recombination properties are expected to be different from those traditionally attributed to deep levels. Hence, while deep centers behave mainly as non-radiative recombination centers, the IB is expected to exhibit negligible non-radiative recombination. It is the purpose of this work to study these phenomena by exploiting computational models based on ab-initio calculations.
Single-cell protein production from purple non-sulphur bacteria-based wastewater treatment
Creators: name: Wada, Ojima Z.
name: Vincent, Annette Shoba
name: Mackey, Hamish R.
Publisher: name: Manara - Qatar Research Repository
Year: 2022
Subjects: subject: Environmental engineering
subject: FOS: Environmental engineering
subject: Pollution and contamination

description: Large-scale production of single-cell protein (SCP) has the potential not only to solve some of the food insecurity and water scarcity crises that plague a significant portion of our world today but also holds the promise to reduce the cost associated with the treatment of industrial and agricultural wastewater. Resource recovery of SCP from organic waste by microbes like yeast and microalgae is commonly documented. However, recently, a class of phototrophic bacteria, purple non-sulphur bacteria (PNSB), has emerged as a favourable option in terms of both wastewater treatment and resource recovery. PNSB are metabolically versatile and tolerant to a wide range of conditions, hence their ability to thrive in diverse waste streams. Besides its rich protein content, PNSB contains other nutritionally valuable bioproducts like carotenoids, coenzyme Q10, 5-aminolevulinic acid, and pantothenic acid. Recent evidence also indicates that PNSB-based aquafeed enhances growth and boosts immunity in certain aquaculture trials. It does not possess the same toxicity as most gram-negative bacteria due to its comparatively less potent lipopolysaccharide composition. With diverse promising prospects of PNSB-based SCP, it is critical to extensively examine the landscape from a holistic standpoint, highlighting the potential challenges large-scale SCP production may pose. Thus, this review explores the comparative advantages of utilizing PNSB for SCP production, essential components of PNSB-based SCP processing, and possible environmental and economic gains associated with the process. Current challenges with PNSB-based SCP production and future outlooks are also examined.Other Information Published in: Reviews in Environmental Science and Bio/Technology
 License: https://creativecommons.org/licenses/by/4.0
See article on publisher's website: http://dx.doi.org/10.1007/s11157-022-09635-y