cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Nonlocal correlations and spectral properties of the Falicov-Kimball model
Creators: name: Ribic, T.
name: Rohringer, G.
name: Held, K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We derive an analytical expression for the local two-particle vertex of the Falicov-Kimball model, including its dependence on all three frequencies, the full vertex and all reducible vertices. This allows us to calculate the self energy in diagrammatic extensions of dynamical mean field theory, specifically in the dual fermion and the one-particle irreducible approach. Non-local correlations are thence included and originate here from charge density wave fluctuations. At low temperatures and in two dimensions, they lead to a larger self energy contribution at low frequencies and a more insulating spectrum.
description: 12 pages, 10 figures
Second International Spectroradiometers Intercomparison: Preliminary Results and Impact on PV Device Calibration
Creators: name: Galleano, R.
name: Zaaiman, W.
name: Strati, C.
name: Bartocci, S.
name: Pravettoni, M.
name: Marzoli, M.
name: Fucci, R.
name: Leanza, G.
name: Timò, G.
name: Minuto, A.
name: Catena, M.
name: Aleo, F.
name: Takagi, S.
name: Akiyama, A.
name: Núñez, R.
name: Belluardo, G.
Publisher: name: WIP
Year: 2013
Subjects: COMPONENTS FOR PV SYSTEMS
Standardisation as Tool for Innovation and Cost Reduction

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 3460-3465
description: This paper describes the preliminary results of an intercomparison of spectroradiometers for global
(GNI) and direct normal incidence (DNI) irradiance in the visible (VIS) and near infrared (NIR) spectral regions
together with an assessment of the impact these results may have on the calibration of triple-junction photovoltaic
devices and on the relevant spectral mismatch calculation. The intercomparison was conducted by six European
scientific laboratories and a Japanese industrial partner. Seven institutions and seven spectroradiometer systems,
representing different technologies and manufacturers were involved, representing a good cross section of the todays'
available instrumentation for solar spectrum measurements.
Monodromy dependence and connection formulae for isomonodromic tau functions
Creators: name: Its, A.
name: Lisovyy, O.
name: Prokhorov, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We discuss an extension of the Jimbo-Miwa-Ueno differential 1-form to a form closed on the full space of extended monodromy data of systems of linear ordinary differential equations with rational coefficients. This extension is based on the results of M. Bertola generalizing a previous construction by B. Malgrange. We show how this 1-form can be used to solve a long-standing problem of evaluation of the connection formulae for the isomonodromic tau functions which would include an explicit computation of the relevant constant factors. We explain how this scheme works for Fuchsian systems and, in particular, calculate the connection constant for generic Painlevé VI tau function. The result proves the conjectural formula for this constant proposed in \cite{ILT13}. We also apply the method to non-Fuchsian systems and evaluate constant factors in the asymptotics of Painlevé II tau function.
description: 54 pages, 6 figures; v4: rewritten Introduction and Subsection 3.3, added few refs to match published article
Characterization of C60:ZnPc Blend Solar Cells at PTB Using the Laser-DSR Facility
Creators: name: Fey, T.
name: Kröger, I.
name: Witt, F.
name: Friedrich, D.
name: Schlüssel, D.
name: Winter, S.
Publisher: name: WIP
Year: 2013
Subjects: COMPONENTS FOR PV SYSTEMS
Standardisation as Tool for Innovation and Cost Reduction

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 3482-3484
description: Organic solar cells have versatile spectral responsivities due to their special chemical composition. For
each system this causes the need for an individual spectral mismatch correction for calibrations with white light
sources especially if silicon based reference materials are used. The Differential Spectral Responsivity (DSR) method
does not need spectral mismatch corrections, since the AM 1.5 spectrum contributes only mathematically to the
determination of the short-circuit current and hence in the efficiency. Thus the DSR method achieves lowest
uncertainties for solar cells with unknown spectral responsivities and is therefore ideally suited to determine the
efficiency of innovative solar cells. Measurements for determining the short-circuit current of a C60:ZnPc blend solar
cell under Standard Test Conditions are performed. Here also the results at different irradiation levels and at different
temperatures are shown. The measurement shows a maximum of the spectral responsivity at 450 nm and a double
peak at 630 nm to 685 nm which can be attributed to the absorption bands of C60 and ZnPc. Furthermore a higher AM
1.5 weighted differential spectral responsivity at low radiation intensities and a higher efficiency for higher
temperatures can be observed. This belongs to the major advantages of organic solar cells. Here also results of
measurements on a nonlinear c-Si Solar cell are shown. The results of both solar cell types are compared and show
the different behavior for the low light and the high temperature regime.
UniSAFE: Technological University Dublin – institutional policy to address gender-based violence
Creators: name: Andreska, Zuzana
name: Huck, Averil
name: Linkova, Marcela
Publisher: name: Zenodo
Year: 2022
Subjects: Gender based-violence
policy framework
gender+
institutional policy

description: UniSAFE has mapped the policies and measures to address and combat GBV in 48 universities and research organisations in 15 European countries. For each institution, the team created Vignettes which present national context, institutional policy, training, role in knowledge production, content of the policy, institutional procedure and implementation of the policy.
Fundamental properties of cooperative contagion processes
Creators: name: Chen, Li
name: Ghanbarnejad, Fakhteh
name: Brockmann, Dirk
Publisher: name: arXiv
Year: 2016
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We investigate the effects of cooperativity between contagion processes that spread and persist in a host population. We propose and analyze a dynamical model in which individuals that are affected by one transmissible agent $A$ exhibit a higher than baseline propensity of being affected by a second agent $B$ and vice versa. The model is a natural extension of the traditional SIS (Susceptible-Infected-Susceptible) model used for modeling single contagion processes. We show that cooperativity changes the dynamics of the system considerably when cooperativity is strong. The system exhibits discontinuous phase transitions not observed in single agent contagion, multi-stability, a separation of the traditional epidemic threshold into different thresholds for inception and extinction as well as hysteresis. These properties are robust and are corroborated by stochastic simulations on lattices and generic network topologies. Finally, we investigate wave propagation and transients in a spatially extended version of the model and show that especially for intermediate values of baseline reproduction ratios the system is characterized by various types of wave-front speeds. The system can exhibit spatially heterogeneous stationary states for some parameters and negative front speeds (receding wave fronts). The two agent model can be employed as a starting point for more complex contagion processes, involving several interacting agents, a model framework particularly suitable for modeling the spread and dynamics of microbiological ecosystems in host populations.
description: 10 pages, 7 figures
Efficiently making (almost) any concurrency control mechanism serializable
Creators: name: Wang, Tianzheng
name: Johnson, Ryan
name: Fekete, Alan
name: Pandis, Ippokratis
Publisher: name: arXiv
Year: 2016
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Concurrency control (CC) algorithms must trade off strictness for performance. Serializable CC schemes generally pay higher cost to prevent anomalies, both in runtime overhead and in efforts wasted by aborting transactions. We propose the serial safety net (SSN), a serializability-enforcing certifier which can be applied with minimal overhead on top of various CC schemes that offer higher performance but admit anomalies, such as snapshot isolation and read committed. The underlying CC retains control of scheduling and transactional accesses, while SSN tracks the resulting dependencies. At commit time, SSN performs an efficient validation test by examining only direct dependencies of the committing transaction to determine whether it can commit safely or must abort to avoid a potential dependency cycle. SSN performs robustly for various workloads. It maintains the characteristics of the underlying CC without biasing toward certain types of transactions, though the underlying CC might. Besides traditional OLTP workloads, SSN also allows efficient handling of heterogeneous workloads with long, read-mostly transactions. SSN can avoid tracking the majority of reads (thus reducing the overhead of serializability certification) and still produce serializable executions with little overhead. The dependency tracking and validation tests can be done efficiently, fully parallel and latch-free, for multi-version systems on modern hardware with substantial core count and large main memory. We demonstrate the efficiency, accuracy and robustness of SSN using extensive simulations and an implementation that overlays snapshot isolation in ERMIA, a memory-optimized OLTP engine that is capable of running different CC schemes. Evaluation results confirm that SSN is a promising approach to serializability with robust performance and low overhead for various workloads.
Thermal conductivity of armchair black phosphorus nanotubes: a molecular dynamics study
Creators: name: Hao, Feng
name: Liao, Xiangbiao
name: Xiao, Hang
name: Chen, Xi
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The effects of size, strain, and vacancies on thermal properties of armchair black phosphorus nanotubes are investigated based on qualitative analysis from molecular dynamics simulations. It is found that the thermal conductivity has a remarkable size effect because of the restricted paths for phonon transport, strongly depending on the diameter and length of nanotube. Owing to the intensified low-frequency phonons, axial tensile strain can facilitate thermal transport. On the contrary, compressive strain weakens thermal transport due to the enhanced phonon scattering around the buckling of nanotube. In addition, the thermal conductivity is dramatically reduced by single vacancies, especially upon high defect concentrations.
Design and Analysis of a High Frequency Inductor for a Photovoltaic Inverter
Creators: name: Alabakhshizadeh, A.
name: Midtgård, O.-M.
Publisher: name: WIP
Year: 2013
Subjects: COMPONENTS FOR PV SYSTEMS
Balance of System Components

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 3409-3412
description: The paper analysis design issues in a high frequency inductor for a photovoltaic inverter. Specially, the
effect of air gaps in the core structure of a ferrite planar ER core on winding losses is examined. In this paper, we
analyze the effects of design parameters on the high frequency inductor by the means of three-dimensional (3D) finite
element analysis. The paper follows a previous work which analysis was performed with a two-dimensional (2D)
model.
K-theory Classification of Graded Ultramatricial Algebras with Involution
Creators: name: Hazrat, Roozbeh
name: Vas, Lia
Publisher: name: arXiv
Year: 2016
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: We consider a generalization $K_0^{\operatorname{gr}}(R)$ of the standard Grothendieck group $K_0(R)$ of a graded ring $R$ with involution. If $Γ$ is an abelian group, we show that $K_0^{\operatorname{gr}}$ completely classifies graded ultramatricial $*$-algebras over a $Γ$-graded $*$-field $A$ such that (1) each nontrivial graded component of $A$ has a unitary element in which case we say that $A$ has enough unitaries, and (2) the zero-component $A_0$ is 2-proper (for any $a,b\in A_0,$ $aa^*+bb^*=0$ implies $a=b=0$) and $*$-pythagorean (for any $a,b\in A_0,$ $aa^*+bb^*=cc^*$ for some $c\in A_0$). If the involutive structure is not considered, our result implies that $K_0^{\operatorname{gr}}$ completely classifies graded ultramatricial algebras over any graded field $A.$ If the grading is trivial and the involutive structure is not considered, we obtain some well known results as corollaries. If $R$ and $S$ are graded matricial $*$-algebras over a $Γ$-graded $*$-field $A$ with enough unitaries and $f: K_0^{\operatorname{gr}}(R)\to K_0^{\operatorname{gr}}(S)$ is a contractive $\mathbb Z[Γ]$-module homomorphism, we present a specific formula for a graded $*$-homomorphism $ϕ: R\to S$ with $K_0^{\operatorname{gr}}(ϕ) = f.$ If the grading is trivial and the involutive structure is not considered, our constructive proof implies the known results with existential proofs. As an application of our results, we show that the graded version of the Isomorphism Conjecture holds for a class of Leavitt path algebras: if $E$ and $F$ are countable, row-finite, no-exit graphs in which every path ends in a sink or a cycle and $K$ is a 2-proper and $*$-pythagorean field, then the Leavitt path algebras $L_K(E)$ and $L_K(F)$ are isomorphic as graded rings if any only if they are isomorphic as graded $*$-algebras.
description: Some typos present in the second version are now corrected
A New MPPT Technique for PV Systems Using Input Characteristic Impedance of Static Converters
Creators: name: Zanotti, J.W.
name: Marques Dos Santos, W.
name: Cruz-Martins, D.
Publisher: name: WIP
Year: 2013
Subjects: COMPONENTS FOR PV SYSTEMS
Balance of System Components

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 3413-3418
description: Most Maximum Power Point Tracking (MPPT) techniques for Photovoltaic (PV) systems require one
or more of the following sensors: voltage sensor, current sensor, temperature sensor, solar irradiance sensor.
This paper introduces a new MPPT control algorithm called Input Characteristic Impedance (ICI) method which uses
just a single voltage sensor. The method is based on the maximum power transfer theorem, where the Input
Characteristic Impedance of the DC-DC converter is modified to reach the Maximum Power Point (MPP). This
technique can be applied to any DC-DC converter like Buck, Boost, Buck-Boost, Cúk, SEPIC and Zeta, and to
validate the new proposal the last was chosen.
Non-local games and optimal steering at the boundary of the quantum set
Creators: name: Zhen, Yi-Zheng
name: Goh, Koon Tong
name: Zheng, Yu-Lin
name: Cao, Wen-Fei
name: Wu, Xingyao
name: Chen, Kai
name: Scarani, Valerio
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The boundary between classical and quantum correlations is well characterised by linear constraints called Bell inequalities. It is much harder to characterise the boundary of the quantum set itself in the space of no-signaling correlations. For the points on the quantum boundary that violate maximally some Bell inequalities, Oppenheim and Wehner [Science 330, 1072 (2010)] pointed out a complex property: the optimal measurements of Alice steer Bob's local state to the eigenstate of an effective operator corresponding to its maximal eigenvalue. This effective operator is the linear combination of Bob's local operators induced by the coefficients of the Bell inequality, and it can be interpreted as defining a fine-grained uncertainty relation. It is natural to ask whether the same property holds for other points on the quantum boundary, using the Bell expression that defines the tangent hyperplane at each point. We prove that this is indeed the case for a large set of points, including some that were believed to provide counterexamples. The price to pay is to acknowledge that the Oppenheim-Wehner criterion does not respect equivalence under the no-signaling constraint: for each point, one has to look for specific forms of writing the Bell expressions.
description: 9 pages
Wind Load Analysis of Sun-Tracker on the Flat Terrain and the Rooftop of a Building
Creators: name: Wu, J.-C.
name: Liao, K.-S.
Publisher: name: WIP
Year: 2013
Subjects: COMPONENTS FOR PV SYSTEMS
Balance of System Components

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 3441-3444
description: This study performed a computational analysis for the flow over a sun-tracker installed with
photovoltaic (PV) panels on the flat terrain and on the rooftop of low-rising building so as to examine the airflow and
provide databank for the structure design code for PV on building. The Large Eddy Simulation (LES) turbulence
model was adopted. Computational velocity and coefficient of pressure (cp) on the windward side of PV panels
installed on the flat terrain revealed smooth, attached and steady flow pattern with smooth distribution of cp. Overall,
numerical prediction agreed reasonably with the data measured in the wind tunnel. On the other hand, separated and
persistent unsteady flow pattern for the tracker on the rooftop of building were predicted. In addition, large variation
and negative values of cp on the windward side of PV panels were obtained. Numerical solution suggested that
completely different wind loads for PV panels between these two cases (ground and rooftop) can encounter depends
on several factors (wind direction, installation site, etc.).
Large Cayley digraphs and bipartite Cayley digraphs of odd diameters
Creators: name: Abas, Marcel
name: Vetrik, Tomas
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: Let $C_{d,k}$ be the largest number of vertices in a Cayley digraph of degree $d$ and diameter $k$, and let $BC_{d,k}$ be the largest order of a bipartite Cayley digraph for given $d$ and $k$. For every degree $d\geq2$ and for every odd $k$ we construct Cayley digraphs of order $2k\left(\lfloor\frac{d}{2}\rfloor\right)^k$ and diameter at most $k$, where $k\ge 3$, and bipartite Cayley digraphs of order $2(k-1)\left(\lfloor\frac{d}{2}\rfloor\right)^{k-1}$ and diameter at most $k$, where $k\ge 5$. These constructions yield the bounds $C_{d,k} \ge 2k\left(\lfloor\frac{d}{2}\rfloor\right)^k$ for odd $k\ge 3$ and $d\ge \frac{3^{k}}{2k}+1$, and $BC_{d,k} \ge 2(k-1)\left(\lfloor\frac{d}{2}\rfloor\right)^{k-1}$ for odd $k\ge 5$ and $d\ge \frac{3^{k-1}}{k-1}+1$. Our constructions give the best currently known bounds on the orders of large Cayley digraphs and bipartite Cayley digraphs of given degree and odd diameter $k\ge 5$. In our proofs we use new techniques based on properties of group automorphisms of direct products of abelian groups.
description: 16 pages, Published in Discrete Mathematics. Free access to the article valid until May 09, 2017: http://doi.org/10.1016/j.disc.2017.02.005
Intra-Module DC-DC Converter: Topology Selection and Analysis
Creators: name: Chatterjee, U.
name: Driesen, J.
Publisher: name: WIP
Year: 2013
Subjects: COMPONENTS FOR PV SYSTEMS
Balance of System Components

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 3419-3423
description: In this paper, firstly the effect of partial shading on output power of a photovoltaic system is discussed
and the limitations of a centralized power conversion for extenuation that problem is described. Here, the aim is to
discuss the limitations of the state-of-art power conversion system and to analyze the possible solutions. The benefits
of the distributed power conversion in terms of overall photovoltaic system efficiency are explored. This work
presents the requirements of the intra-module converter in photovoltaic system and also discusses the different factors
that need to consider while implementing a DC-DC converter as an intra-module converter. A topology of high gain
DC-DC converter is presented here, which can be used in photovoltaic applications as an intra-module converter.
This paper also demonstrates the suitability of this presented converter in photovoltaic applications. Simulation
results of the proposed converter are also presented here.
PV-Roof-Integrated Systems vs. Best- and Worst-Cases / Novel Measurement for Long-Term Outdoor Measurement of PV Roof-Integrated System (Electrical, Thermal and Mechanical Behaviors)
Creators: name: Firges, J.
name: Funtan, P.
name: Henze, N.
name: Roos, M.
name: Misara, S.
Publisher: name: WIP
Year: 2013
Subjects: COMPONENTS FOR PV SYSTEMS
Balance of System Components

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 3445-3451
description: The popularity of PV -facade and -roof integrated systems still remain at small scale compared to fast
growing PV on-roof systems. One of the most significant obstacles is the technical barrier (electrical, thermal and
mechanical behaviours). With the national research project MULTIELEMENT supported by BMU, the electrical, thermal
and mechanical measurements have been performed under long term outdoor conditions.
The evaluations show, that the heat-flux to internal room over solar irradiation increases by the roof tilt angle.
Furthermore the fluctuation of temperature caused by weather conditions does not have a significant impact on the total
energy yield, whereas temperature influence on sunny days is noticeable. For the wind direction from south-east to southwest,
directly towards the module surface, the temperature of the bottom PV module is lower than the one at the top of
the PV array (~ 2-4 °C) due to chimney effect. For the wind direction from north-east to north-west, wind from backside
of PV array, the operating temperature of PV module at bottom may be higher up to 6°C compared to that at the top of
the field due to cooling effect from turbulences at the top edge of the roof. The average energy yield of the bottom
module is about 1% higher compared to the top module. In comparison to the free-standing PV module, these energy
yields of PV roof-integrated system exhibit only -0.9% to -1.8% for bottom and top modules of PV array, respectively. At
the same time, the energy yield of the worst-case scenario module (fully thermal isolated module) shows -4% compared
to the free-standing PV module.
Finite Element Modeling and Simulating of a High Frequency Inductor in the Solar Inverter
Creators: name: Alabakhshizadeh, A.
name: Midtgård, O.-M.
name: Boysen, K.
Publisher: name: WIP
Year: 2013
Subjects: COMPONENTS FOR PV SYSTEMS
Balance of System Components

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 3387-3390
description: An existing high frequency inductor used by a commercial developer of PV inverters has been
analyzed by use of electromagnetic finite element models. In this paper a new core material has been selected in order
to increase the performance and decrease the total loss, especially copper loss. A commercial software package has
been applied for the simulations. The three-dimensional results from finite element computations of a high frequency
inductor with different core material have been presented.
Preventive Counselling on well-being of undergraduates in Nigeria University
Creators: name: Abidogun, Moruf Adebayo
Publisher: name: figshare
Year: 2022
Subjects: subject: 170106 Health, Clinical and Counselling Psychology
subject: FOS: Psychology
subject: 170103 Educational Psychology

description: Counselling is considered developmental rather than therapeutic and is aimed at assisting students to learn the techniques and skills involved in problem-solving and long-term planning. The counselling for the development of the undergraduates whole person must be viewed from the perspective of prevention. The study examined preventive counseling on well-being of undergraduates in Nigeria University. The dimensional well-being of undergraduate students includes Physical well-being, Economic well-being, Social well-being, Development and activity, Emotional well-being, Psychological well-being, Life satisfaction, Domain specific satisfaction, Engaging activities and work. The study used descriptive survey study designs with both qualitative and quantitative approaches. Purposive and simple random sampling techniques were employed. Data was collected using self-administered questionnaire from 240 undergraduates across 100 - 400 Level from Lagos state University, Ojo at Faculty of Education. A percentage was used to describe the students’ distribution according to sex, while t-test was used to test for the formulated hypothesis. The findings revealed that the Preventive Counselling on well-being viewed person of students and proved to be moderately effective in influencing undergraduate total wholesomely. It was concluded that Preventing Counseling services has an effect in shaping undergraduates well-being wholesomely. Based on this findings, the following recommendation were made that all undergraduate students should be made to register with the counselling centre and Government policy through her agency must make it mandatory for all undergraduate to have Guidance Counsellor.
Direct Ejecta Velocity Measurements of Tycho's Supernova Remnant
Creators: name: Sato, Toshiki
name: Hughes, John P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the first direct ejecta velocity measurements of Tycho's supernova remnant (SNR). Chandra's high angular resolution images reveal a patchy structure of radial velocities in the ejecta that can be separated into distinct redshifted, blueshifted, and low velocity ejecta clumps or blobs. The typical velocities of the redshifted and blueshifted blobs are
description: Accepted to appear in ApJ, 18 pages, 13 figures, 6 tables
Enhanced MPPT Control of a Two-Stage Grid-Connected PV System under Fast-Changing Irradiance Conditions
Creators: name: Nanou, S.
name: Batzelis, E.
name: Papathanassiou, S.
Publisher: name: WIP
Year: 2013
Subjects: COMPONENTS FOR PV SYSTEMS
Balance of System Components

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 3399-3403
description: In this paper, an enhanced Maximum Power Point Tracking (MPPT) strategy for a two-stage gridconnected
PV system is proposed, which enables accurate tracking of the maximum power point irrespective of the
rate of change in solar irradiance levels. The analysis is performed both in the frequency and time domains, using a
suitable linearized model of the system. A comparative assessment of the proposed MPPT strategy versus a
conventional Perturbation and Observation (P&O) method is carried out for operation under trapezoidal irradiance
profiles.
Amenability versus property (T) for non locally compact topological groups
Creators: name: Pestov, Vladimir G.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 22A25, 43A65, 57S99

description: For locally compact groups amenability and Kazhdan's property (T) are mutually exclusive in the sense that a group having both properties is compact. This is no longer true for more general Polish groups. However, a weaker result still holds for SIN groups (topological groups admitting a basis of conjugation-invariant neighbourhoods of identity): if such a group admits sufficiently many unitary representations, then it is precompact as soon as it is amenable and has the strong property (T) (i.e. admits a finite Kazhdan set). If an amenable topological group with property (T) admits a faithful uniformly continuous representation, then it is maximally almost periodic. In particular, an extremely amenable SIN group never has strong property (T), and an extremely amenable subgroup of unitary operators in the uniform topology is never a Kazhdan group. This leads to first examples distinguishing between property (T) and property (FH) in the class of Polish groups. Disproving a 2003 conjecture by Bekka, we construct a complete, separable, minimally almost periodic topological group with property (T), having no finite Kazhdan set. Finally, as a curiosity, we observe that the class of topological groups with property (T) is closed under arbitrary infinite products with the usual product topology.
description: 23 pages, latex 2e. Comments by the referee of Trans. Am. Math. Soc. taken into account
Phase transitions and critical phenomena of tiny grains carbon films synthesized in microwave-based vapor deposition system
Creators: name: Ali, Mubarak
name: Lin, I-Nan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Different peak trends of tiny grains carbon film have been observed under the investigations of Raman spectroscopy and energy loss spectroscopy. Carbon films known in nanocrystalline and ultra-nanocrystalline diamond films are synthesized by employing microwave-based vapor deposition system. Carbon atoms exhibit several state behaviors depending on the incurred positions of their electrons. Different morphology of tiny grains under different chamber pressure is related to different rate of arriving typical energies at/near substrate surface. Those tiny grains of carbon film which evolved in graphitic state atoms are converted to structure of smooth elements where elongation of atoms of one-dimensional arrays is as per exerting surface format forces along opposite poles from their centers. Such tiny grains in the film are the cause of v1 peak under the investigation of the Raman spectrum because of the enhanced propagation of input laser signals through channelized inter-state electron gaps of elongated graphitic state atoms. Those tiny grains of carbon film which evolved in fullerene state are the cause of v2 peak. The tiny grains related to v1 peak possess a low intensity as compared to the ones which comprised atoms having state behaviors known in their exceptional hardness. Tiny grains representing v1 peak in the Raman spectrum are also the cause of field emission characteristic of a carbon film. Different peak recordings were made for the Raman at defined positions indicating a different state of carbon atoms for a different phase of deposited tiny grains, which is in line to their energy loss spectroscopy.
How to Degin Solar Module in the Tropics
Creators: name: Wang, Q.
name: Rui, C.
name: Sun, J.
name: Zhao, X.
name: Cai, J.
Publisher: name: WIP
Year: 2013
Subjects: COMPONENTS FOR PV SYSTEMS
PV Modules

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 3362-3364
description: Homogeneity is a common phenomenon in the market of solar modules before. But nowadays the fight
for differentiation in the PV module business gets fierce. Our work just focuses on the special design qualification of
crystalline silicon solar module which is more suitable for tropical climate. Some more rigorous test items are carried
out for this design, such as PID-600hrs, DH2000 and UV60kWh/m2. BOM (bill of material) of the solar module is
drafted as anti-PID solar cells, hydrolysis-resistant back-sheet and UV-resistant EVA.
Investigation of Thermal Interaction between PV-Module and Integrated Micro-Inverter
Creators: name: Roßmanit, S.
name: Parzinger, S.
name: Spinnler, M.
name: Mayer, O.
name: Sattelmayer, T.
Publisher: name: WIP
Year: 2013
Subjects: COMPONENTS FOR PV SYSTEMS
Balance of System Components

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 3369-3375
description: Recent developments increased the reliability of micro-inverters and made them popular for small scale
photovoltaic (PV) systems. However, mounted onto the back of the PV module, these inverters act as thermal loads that
might influence the module characteristics. The thermal interaction between the PV module and the micro-inverter is
investigated by performing experiments in a solar simulator. Experimental results show that only small differences in
temperature and power output can be observed between a module with and without micro-inverter. These differences also
depend on the inclination angle of the module and whether the module is shielded from the back. An annual simulation of
the system consisting of a simulation of the module characteristics and an additional thermal simulation is conducted in
order to analyse the system’s behavior under realistic environmental conditions for two locations: Munich and Almerìa.
Considering a whole year, the energy losses due to the thermal interaction between micro-inverter and PVmodule are
smaller than 0.5%.
Scalable and Flexible Multiview MAX-VAR Canonical Correlation Analysis
Creators: name: Fu, Xiao
name: Huang, Kejun
name: Hong, Mingyi
name: Sidiropoulos, Nicholas D.
name: So, Anthony Man-Cho
Publisher: name: arXiv
Year: 2016
Subjects: subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Generalized canonical correlation analysis (GCCA) aims at finding latent low-dimensional common structure from multiple views (feature vectors in different domains) of the same entities. Unlike principal component analysis (PCA) that handles a single view, (G)CCA is able to integrate information from different feature spaces. Here we focus on MAX-VAR GCCA, a popular formulation which has recently gained renewed interest in multilingual processing and speech modeling. The classic MAX-VAR GCCA problem can be solved optimally via eigen-decomposition of a matrix that compounds the (whitened) correlation matrices of the views; but this solution has serious scalability issues, and is not directly amenable to incorporating pertinent structural constraints such as non-negativity and sparsity on the canonical components. We posit regularized MAX-VAR GCCA as a non-convex optimization problem and propose an alternating optimization (AO)-based algorithm to handle it. Our algorithm alternates between {\em inexact} solutions of a regularized least squares subproblem and a manifold-constrained non-convex subproblem, thereby achieving substantial memory and computational savings. An important benefit of our design is that it can easily handle structure-promoting regularization. We show that the algorithm globally converges to a critical point at a sublinear rate, and approaches a global optimal solution at a linear rate when no regularization is considered. Judiciously designed simulations and large-scale word embedding tasks are employed to showcase the effectiveness of the proposed algorithm.
Identification of new benzimidazole-triazole hybrids as anticancer agents: multi-target recognition, in vitro and in silico studies
Creators: name: Othman, Dina I. A.
name: Hamdi, Abdelrahman
name: Tawfik, Samar S.
name: Elgazar, Abdullah A.
name: Mostafa, Amany S.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Cancer

description: Multi-target inhibitors represent useful anticancer agents with superior therapeutic attributes. Here in, two novel series of benzimidazole-triazole hybrids were designed, synthesised as multi-target EGFR, VEGFR-2 and Topo II inhibitors, and evaluated for anticancer activity. Compounds 5a and 6g were the most potent analogues against four cancer cell lines, HepG-2, HCT-116, MCF-7 and HeLa, and were further evaluated for EGFR, VEGFR-2, and Topo II inhibition. Compound 5a was especially good inhibitor for EGFR (IC50 = 0.086 µM) compared to Gefitinib (IC50 = 0.052 µM), moderate VEGFR-2 inhibitor (IC50 = 0.107 µM) compared to Sorafenib (IC50 = 0.0482 µM), and stronger Topo II inhibitor (IC50 = 2.52 µM) than Doxorubicin (IC50 = 3.62 µM). Compound 6g exhibited moderate EGFR and VEGFR-2 inhibition and weaker Topo II inhibition. DNA binding assay, cell cycle analysis, apoptotic induction, molecular docking, and physicochemical studies were additionally implemented to explore the plausible mechanism of the active compounds.
Optical-Thermal-Electrical Model for a Single Cell PV Module in Non-Steady-State and Non-Uniform Conditions Build in SPICE
Creators: name: Goverde, H.
name: Govaerts, J.
name: Baert, J.
name: Catthoor, F.
name: Driesen, J.
name: Poortmans, J.
Publisher: name: WIP
Year: 2013
Subjects: COMPONENTS FOR PV SYSTEMS
PV Modules

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 3291-3295
description: An optical-thermal-electrical model of a photovoltaic (PV) module was developed in SPICE. The
mixed-signal model consists of two coupled sub-circuits, one sub-circuit to describe the thermal response and one to
incorporate electrical characteristics of the PV module. In this paper, various types of thermal equivalent RCnetworks
and the extraction procedure of parameters for the thermal sub-circuit are explained in detail. The thermal
sub-circuit is used to simulate module temperatures as a function of illumination level, ambient temperature, wind
conditions, electrical load (by coupling the thermal sub-circuit to the electrical sub-circuit) and illumination history.
Since the model has been built in SPICE, it can be used to evaluate PV module characteristics during transient and
non-uniform conditions. The complete model can be used to calculate the energy yield, to investigate thermal and
electrical characteristics of the module and to evaluate energy yield losses due to non-steady-state and non-uniform
illumination and ambient conditions.
Kinetic Description and Modeling of Potential Induced Degradation
Creators: name: Taubitz, C.
name: Kröber, M.
name: Schütze, M.
name: Köntopp, M.B.
Publisher: name: WIP
Year: 2013
Subjects: COMPONENTS FOR PV SYSTEMS
PV Modules

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 3321-3323
description: Potential induced degradation (PID) is one of the failure modes in today’s photovoltaic (PV)-systems
with strong impact on PV-module performance. Potential-induced shunting (PIS) is one of the most severe types of
PID leading to shunting of p-type silicon solar cells. Previously, the kinetics of PIS was investigated in detail. It
was shown that the temperature dependence of PIS as well as regeneration from PIS is Arrhenius-like, opening the
opportunity to develop a kinetic model based on Arrhenius-like expressions. In addition a so called transition-phase
was found leading to continued shunting even after the voltage stress has been removed.
In this work the transition-phase is investigated in detail. It is shown that this phase is only present in the PISkinetics
if previous PIS stress has decreased the shunt resistance Rsh,PIS to values below 14 kcm2. It is found that
the duration of the transition-phase ttransition is temperature dependent and can be described with an Arrhenius-like
expression.
Based on these findings a preliminary model for the kinetics of PIS was developed. This model considers
temperature, as well as other environmental conditions to describe the progression of PIS for a specific location. By
using meteorological data measured at Thalheim (Germany) during the year 2012 we present results modeling PIS
behavior over time.
TECHNIQUES FOR INCREASING DESIRABLE BEHAVIOUR: IMPLICATIONS FOR RE-ENGINEERING OF INDIVIDUAL TOWARDS ADJUSTMENT
Creators: name: Abidogun, Moruf Adebayo
name: Mumuni, Malik Adekunle
Publisher: name: figshare
Year: 2022
Subjects: subject: Organizational Behavioral Psychology
subject: 170106 Health, Clinical and Counselling Psychology
subject: FOS: Psychology

description: This paper reviewed existing research studies on increasing desirable behaviour. In this study, the technique for increasing desirable behaviour is examined. It highlighted some methods and techniques that increased desirable behaviour as well as implication for re-engineering of individuals for ultimate adjustment. The finding showed that shaping, fading, operant conditioning, chaining and modeling are techniques for increasing desirable behaviour which are very important for enhanced and accelerate good and desirable behaviour. This Study contributes in existing literature of techniques for increasing desirable behaviour in relation to behavioural modification
Ropelength, crossing number and finite type invariants of links
Creators: name: Komendarczyk, R.
name: Michaelides, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: Ropelength and embedding thickness are related measures of geometric complexity of classical knots and links in Euclidean space. In their recent work, Freedman and Krushkal posed a question regarding lower bounds for embedding thickness of $n$-component links in terms of the Milnor linking numbers. The main goal of the current paper is to provide such estimates and thus generalizing the known linking number bound. In the process, we collect several facts about finite type invariants and ropelength/crossing number of knots. We give examples of families of knots, where such estimates behave better than the well-known knot-genus estimate.
description: 16 pages, 6 figures (accepted for publication), corrected: proofs of Theorem B, Lemma F, and constants in the estimates of Theorem A
Effects of poly(o-phenylenediamine) functionalized SiC on the corrosion protection ability of neat polyurethane coating system in the marine environment
Creators: name: Vinodhini, S. P
name: Xavier, Joseph Raj
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Space Science
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Inorganic Chemistry

description: A novel nanocomposite consisting of polyurethane (PU), poly(o-phenylenediamine) (PoPD), and silicon carbide (SiC) nanoparticles was investigated for its application in marine environment through electrochemical techniques. The PoPD/SiC nanofillers were characterized by TGA, XRD, SEM/EDX, and TEM analyses. The anticorrosion and mechanical properties of different coating formulation in marine environment were evaluated by electrochemical impedance spectroscopy (EIS) and scanning electrochemical microscopy (SECM). It was also found that the coating resistance of PU-PoPD/SiC nanocomposite was over 41 times higher than that of the PU coating. The PU-PoPD/SiC coatings on the brass showed low current of 1.9 I/nA due to copper dissolution and 6.8 I/nA due to zinc dissolution because of the well distribution of PoPD/SiC nanofiller in PU coating. The analyses of the resultant degradation products by SEM/EDX and XRD techniques confirmed the presence of Si which has a major role in protecting the brass surface against corrosion. Results showed that the PU composite with 2 wt.% PoPD/SiC hybrid nanofillers had outstanding coating performance. This nanocomposite demonstrated improved corrosion protection. As a result, the developed PU-PoPD/SiC nanocomposite has exceptional adhesion strength and anticorrosion properties and might be exploited to develop next-generation anticorrosive coatings.
Contribution of PV Encapsulant Composition to Reduction of Potential Induced Degradation (PID) of Crystalline Silicon PV Cells
Creators: name: Reid, C.
name: Ferrigan, S.
name: Fidalgo, I.
name: Woods, J.
Publisher: name: WIP
Year: 2013
Subjects: COMPONENTS FOR PV SYSTEMS
PV Modules

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 3340-3346
description: This paper reports the results of evaluation of several photovoltaic (PV) encapsulant compositions
based upon EVA (ethylene vinyl acetate copolymer), and POE (polyolefin elastomer) that have been studied for PID
resistance with crystalline silicon PV cells. The laboratory screening method utilized is a single PV cell module with
an electrical circuit that applies negative bias to the PV cell and continuously monitors the shunt resistance through
the PV cell during exposure to stress factors. Full-size 60 cell modules have also been manufactured and tested with
methods to force PID behavior. During both the laboratory and full-scale module tests, several key encapsulant
compositional variables were found that control PID. Of greatest importance for PID resistance is the volume
resistivity (VR) of the encapsulant and stability of volume resistivity (or wet insulation resistance) during the aging
protocol used for the PID test. Moisture vapor transmission rate (MVTR) is also a significant variable for PID. High
temperatures (60°C or 85°C) are used to accelerate the transfer of positive charges from glass to the PV cell. It is
expected that encapsulants with higher VR and lower MVTR at the elevated test temperature will yield less charge
transfer through the encapsulant. Volume resistivity above 1015 ohm•cm has not been routinely achieved with earlier
generation EVA-encapsulants. New-generation EVA formulations are described here with volume resistivity above
1015 ohm•cm that offer improved PID resistance for PV modules. Other encapsulants based upon ethylene
copolymers with high VR and lower MVTR show further improvement of resistance to PID effects. This work
demonstrates that a combination of improved PV cells and high volume resistivity encapsulant is required to achieve
very robust PID resistance of a PV module.
TECHNIQUES FOR INCREASING DESIRABLE BEHAVIOUR: IMPLICATIONS FOR RE-ENGINEERING OF INDIVIDUAL TOWARDS ADJUSTMENT
Creators: name: Abidogun, Moruf Adebayo
Publisher: name: figshare
Year: 2022
Subjects: subject: Organizational Behavioral Psychology
subject: 170106 Health, Clinical and Counselling Psychology
subject: FOS: Psychology

description: This paper reviewed existing research studies on increasing desirable behaviour. In this study, the technique for increasing desirable behaviour is examined. It highlighted some methods and techniques that increased desirable behaviour as well as implication for re-engineering of individuals for ultimate adjustment. The finding showed that shaping, fading, operant conditioning, chaining and modeling are techniques for increasing desirable behaviour which are very important for enhanced and accelerate good and desirable behaviour. This Study contributes in existing literature of techniques for increasing desirable behaviour in relation to behavioural modification