cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Stima dei parametri di modelli idrologici mediante ottimizzazione dell’utilità
Parameterization of rainfall-runoff models by using utility functions
Creators: name: Baratti, Emanuele <1983>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2014
Subjects: ICAR/02 Costruzioni idrauliche e marittime e idrologia

description: Tradizionalmente, l'obiettivo della calibrazione di un modello afflussi-deflussi è sempre stato quello di ottenere un set di parametri (o una distribuzione di probabilità dei parametri) che massimizzasse l'adattamento dei dati simulati alla realtà osservata, trattando parzialmente le finalità applicative del modello. 

Nel lavoro di tesi viene proposta una metodologia di calibrazione che trae spunto dell'evidenza che non sempre la corrispondenza tra dati osservati e simulati rappresenti il criterio più appropriato per calibrare un modello idrologico. Ai fini applicativi infatti, può risultare maggiormente utile una miglior rappresentazione di un determinato aspetto dell'idrogramma piuttosto che un altro. 

Il metodo di calibrazione che viene proposto mira a valutare le prestazioni del modello stimandone l'utilità nell'applicazione prevista. Tramite l'utilizzo di opportune funzioni, ad ogni passo temporale viene valutata l'utilità della simulazione ottenuta. La calibrazione viene quindi eseguita attraverso la massimizzazione di una funzione obiettivo costituita dalla somma delle utilità stimate nei singoli passi temporali. 

Le analisi mostrano come attraverso l'impiego di tali funzioni obiettivo sia possibile migliorare le prestazioni del modello laddove ritenute di maggior interesse per per le finalità applicative previste.
description: In the majority of rainfall-runoff modelling applications, the objective function to be minimised in the parameterisation procedure is 
based on a measure of the goodness-of-fit that maximized the fit of the simulated data to the overall observed data, taking partially into account the specific model applications.

The present dissertation focuses on the development and testing of an objective function based on the expected utility of the rainfall-runoff model.
The method is based on the evidence that the performances of a hydrological model closely depend on the purpose of the application. For istance, the simulated data caught have different utility in a water resources management system or in a flood forecasting system.

In the proposed method, at each time step, the comparison between simulated and observed data is carried out by using an “ad-hoc” utility function. The calibration is performed by maximizing the overall estimated utility of the simulated data. Different utility functions are tested and the results are compared against those obtained with traditional procedure. 

The results reveal that an adequate utility function allows an improvement of the model performances in the reproduction of the discharges considered most important to the purpose of the modeling application.
Calculation of Band Structure Using Local Sampling and Green's Functions
Creators: name: Khoshnegar, Milad
name: Khorasani, Sina
name: Hosseinnia, Amirhossein
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A new method for calculation of band structure has been proposed based on the Green's function theory and local sampling. Potential energy in the Hamiltonian of Schrodinger's equation is approximated with a series of sampled Dirac delta functions weighted by appropriate factors. These factors are found from multipole expansion of atomic potentials in the crystal lattice, with considering effects such as screening. Fourier transform was then applied to describe the wave function in reciprocal space. Sampling can be uniform or non-uniform throughout space; however rate and interval optimization is essential. Theory was implemented for Silicon, Germanium and Graphene sheet individually, while results were compared with the ab-initio non-local pseudopotential (AINLPS) method. Also for Silicon, the pseudopotential used in orbital-free density functional theory (OF-DFT) was employed as a suitable sampling source. Phase variations of the dispersion formula are analyzed, introducing adapting parameters to improve compatibility with ab-initio results. Local analysis with low order truncation in real space, reduces implementation time while giving acceptable results.
description: Accepted to Physical Review B
Survival of charmonia above Tc in anisotropic lattice QCD
Creators: name: Iida, H.
name: Doi, T.
name: Ishii, N.
name: Suganuma, H.
name: Tsumura, K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We find a strong evidence for the survival of $J/Ψ$ and $η_c$ as spatially-localized $c\bar c$ (quasi-)bound states above the QCD critical temperature $T_c$, by investigating the boundary-condition dependence of their energies and spectral functions. In a finite-volume box, there arises a boundary-condition dependence for spatially spread states, while no such dependence appears for spatially compact states. In lattice QCD, we find almost {\it no} spatial boundary-condition dependence for the energy of the $c\bar c$ system in $J/Ψ$ and $η_c$ channels for $T\simeq(1.11-2.07)T_c$. We also investigate the spectral function of charmonia above $T_c$ in lattice QCD using the maximum entropy method (MEM) in terms of the boundary-condition dependence. There is {\it no} spatial boundary-condition dependence for the low-lying peaks corresponding to $J/Ψ$ and $η_c$ around 3GeV at $1.62T_c$. These facts indicate the survival of $J/Ψ$ and $η_c$ as compact $c\bar c$ (quasi-)bound states for $T_c < T < 2T_c$.
description: 4 pages, 1 figure
On the boundedness of an iteration involving points on the hypersphere
Creators: name: Binder, Thomas
name: Martinetz, Thomas
Publisher: name: arXiv
Year: 2010
Subjects: subject: Computational Geometry (cs.CG)
subject: FOS: Computer and information sciences

description: For a finite set of points $X$ on the unit hypersphere in $\mathbb{R}^d$ we consider the iteration $u_{i+1}=u_i+χ_i$, where $χ_i$ is the point of $X$ farthest from $u_i$. Restricting to the case where the origin is contained in the convex hull of $X$ we study the maximal length of $u_i$. We give sharp upper bounds for the length of $u_i$ independently of $X$. Precisely, this upper bound is infinity for $d\ge 3$ and $\sqrt2$ for $d=2$.
A Meandering Inflaton
Creators: name: Tye, S. -H. Henry
name: Xu, Jiajun
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: If the cosmological inflationary scenario took place in the cosmic landscape in string theory, the inflaton, the scalar mode responsible for inflation, would have meandered in a complicated multi-dimensional potential. We show that this meandering property naturally leads to many e-folds of inflation, a necessary condition for a successful inflationary scenario. This behavior also leads to fluctuations in the primordial power spectrum of the cosmic microwave background radiation, which may be detected in a near future cosmic variance limited experiment like PLANCK.
description: minor additions, matched to published version
Dusona spinipes
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Dusona
Dusona spinipes

description: Dusona spinipes (THOMSON, 1887)
M a t e r i a l e x a m i n e d: Trap 2: 1♀ 7-21.ix.; trap 7: 1♀ 10-24.viii.
D i s t r i b u t i o n: Transpalaearctic and Oriental, new record for Georgia and the Caucasus region.
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 74, DOI: 10.5281/zenodo.10415120
Evidence of multithermal nature of spicular downflows. Impact on solar atmospheric heating
Creators: name: Bose, Souvik
name: van der Voort, Luc Rouppe
name: Joshi, Jayant
name: Henriques, Vasco M. J.
name: Nóbrega-Siverio, Daniel
name: Martínez-Sykora, Juan
name: De Pontieu, Bart
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Spectroscopic observations of the emission lines formed in the solar transition region (TR) commonly show persistent downflows of the order of 10--15 km/s. The cause of such downflows, however, is still not fully clear and has remained a matter of debate. We aim to understand the cause of such downflows by studying the coronal and TR responses to the recently reported chromospheric downflowing rapid red shifted excursions (RREs), and their impact on heating the solar atmosphere. We have used two sets of coordinated data from SST, IRIS, and SDO for analyzing the response of the downflowing RREs in the TR and corona. To provide theoretical support, we use an already existing 2.5D MHD simulation of spicules performed with the Bifrost code. We find ample occurrences of downflowing RREs and show several examples of their spatio-temporal evolution, sampling multiple wavelength channels ranging from the cooler chromospheric to hotter coronal channels. These downflowing features are thought to be likely associated with the returning components of the previously heated spicular plasma. Furthermore, the TR Doppler shifts associated with them are close to the average red shifts observed in this region which further implies that these flows could (partly) be responsible for the persistent downflows observed in the TR. We also propose two mechanisms (a typical upflow followed by a downflow and downflows along a loop), from the perspective of numerical simulation, that could explain the ubiquitous occurrence of such downflows. A detailed comparison between the synthetic and observed spectral characteristics, reveals a distinctive match, and further suggests an impact on the heating of the solar atmosphere. We present evidence that suggests that at least some of the downflowing RREs are the chromospheric counterparts of the TR and lower coronal downflows.
description: 20 pages, 10 figures, accepted for publication in Astronomy and Astrophysics. Abstract abridged due to arXiv requirements
Universal Cellular Automata Based on the Collisions of Soft Spheres
Creators: name: Margolus, Norman
Publisher: name: arXiv
Year: 2008
Subjects: subject: Cellular Automata and Lattice Gases (nlin.CG)
subject: FOS: Physical sciences

description: Fredkin's Billiard Ball Model (BBM) is a continuous classical mechanical model of computation based on the elastic collisions of identical finite-diameter hard spheres. When the BBM is initialized appropriately, the sequence of states that appear at successive integer time-steps is equivalent to a discrete digital dynamics. Here we discuss some models of computation that are based on the elastic collisions of identical finite-diameter soft spheres: spheres which are very compressible and hence take an appreciable amount of time to bounce off each other. Because of this extended impact period, these Soft Sphere Models (SSM's) correspond directly to simple lattice gas automata--unlike the fast-impact BBM. Successive time-steps of an SSM lattice gas dynamics can be viewed as integer-time snapshots of a continuous physical dynamics with a finite-range soft-potential interaction. We present both 2D and 3D models of universal CA's of this type, and then discuss spatially-efficient computation using momentum conserving versions of these models (i.e., without fixed mirrors). Finally, we discuss the interpretation of these models as relativistic and as semi-classical systems, and extensions of these models motivated by these interpretations.
description: 22 pages, 17 figures; published in 2002 as a chapter of a book (arxiv-ing for longterm availability)
Local stability of McKean-Vlasov equations arising from heterogeneous Gibbs systems using limit of relative entropies
Creators: name: Dawson, D. A.
name: Sid-Ali, A.
name: Zhao, Y. Q.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Probability (math.PR)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: A family of heterogeneous mean-field systems with jumps is analyzed. These systems are constructed as a Gibbs measure on block graphs. When the total number of particles goes to infinity, a law of large numbers is shown to hold in a multi-class context resulting in the weak convergence of the empirical vector towards the solution of a McKean-Vlasov system of equations. We then investigate the local stability of the limiting McKean-Vlasov system through the construction of a local Lyapunov function. We first compute the limit of adequately scaled relative entropy functions associated with the explicit stationary distribution of the N-particles system. Using a Laplace principle for empirical vectors we show that the limit takes an explicit form. Then we demonstrate that this limit satisfies a descent property which, combined with some mild assumptions shows that it is indeed a local Lyapunov function.
Исследования Змиеых валов. В кн.: Археологические открытия 1974 года
Creators: name: Kuchera, Mykhailo
name: Р.А. Юра
Publisher: name: Figshare
Year: 2019
Subjects: Archaeology

description: Кучера М.П., Юра Р.А. Исследования Змиеых валов. В кн.: Археологические открытия 1974 года. М., "Наука", 1975, с.309-310.
Dusona stragifex
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Dusona
Dusona stragifex

description: Dusona stragifex (FÖRSTER, 1868)
M a t e r i a l e x a m i n e d: Trap 2: 1♀ 7-21.ix.; trap 4: 2♁♁ 15-29.vi., 1♀ 13-27.vii.; trap 8: 1♀ 15-29.vi.; trap 12: 1♀ 20.v.-1.vi.; trap 15: 1♀ 14-28.vii.
D i s t r i b u t i o n: Transpalaearctic, known from Georgia (HORSTMANN 2011, RIEDEL et al. 2018).
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 74, DOI: 10.5281/zenodo.10415120
Hessian-based toolbox for reliable and interpretable machine learning in physics
Creators: name: Dawid, Anna
name: Huembeli, Patrick
name: Tomza, Michał
name: Lewenstein, Maciej
name: Dauphin, Alexandre
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Machine learning (ML) techniques applied to quantum many-body physics have emerged as a new research field. While the numerical power of this approach is undeniable, the most expressive ML algorithms, such as neural networks, are black boxes: The user does neither know the logic behind the model predictions nor the uncertainty of the model predictions. In this work, we present a toolbox for interpretability and reliability, agnostic of the model architecture. In particular, it provides a notion of the influence of the input data on the prediction at a given test point, an estimation of the uncertainty of the model predictions, and an extrapolation score for the model predictions. Such a toolbox only requires a single computation of the Hessian of the training loss function. Our work opens the road to the systematic use of interpretability and reliability methods in ML applied to physics and, more generally, science.
description: 17 pages, 7 figures, example code is available at https://github.com/Shmoo137/Hessian-Based-Toolbox
Dusona subimpressa
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Dusona
Dusona subimpressa

description: Dusona subimpressa (FÖRSTER, 1868)
M a t e r i a l e x a m i n e d: Trap2: 1♀ 20.iv.-5.v., 1♀ 27.vii.-10.viii.; trap 4: 3♀♀ 20.iv.-5.v., 1♁ 13-27.vii.; trap 7: 2♀♀ 1♁ 23.iv.-5.v., 2♀♀ 20.v.-1.vi., 2♀♀ 13-27.vii., 2♀♀ 27.vii.-10.viii., 1♀ 1♁ 7-21.ix., 1♁ 5-19.x., 3♀♀ 2♁♁ 19.x.-3.xi.; trap 8: 1♀ 1♁ 15-29.vi.
D i s t r i b u t i o n: Transpalaearctic, known from Georgia (RIEDEL & JAPOSHVILI 2021).
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 74, DOI: 10.5281/zenodo.10415120
Reactivity of activated electrophiles and nucleophiles: labile intermediates and properties of the reaction products
Creators: name: Zanna, Nicola <1983>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2013
Subjects: CHIM/06 Chimica organica

description: The main topic of my Ph.D. thesis is the study of nucleophilic and electrophilic aromatic substitution reaction, in particular from a mechanistic point of view. The research was mainly focused on the reactivity of superactivated aromatic systems. In spite of their high reactivity (hence the high reaction’s rate), we were able to identify and in some case to isolate -complexes until now only hypothesized. For example, interesting results comes from the study of the protonation of the supernucleophiles tris(dialkylamino)benzenes. However, the best result obtained in this field was the isolation and structural characterization of the first stables zwitterionic Wheland-Meisenheimer complexes by using 2,4-dipyrrolidine-1,3-thiazole as supernucleophile and 4,6-dinitrobenzofuroxan or 4,6-dinitrotetrazolepyridine as superelectrophile. These reactions were also studied by means of computational chemistry, which allowed us to better investigate on the energetic and properties of the reactions and reactants studied. 
We also discovered, in some case fortuitously, some relevant properties and application of the compounds we synthesized, such as fluorescence in solid state and nanoparticles, or textile dyeing. We decided to investigate all these findings also by collaborating with other research groups.
 During a period in the “Laboratoire de Structure et Réactivité des Systèmes Moléculaires Complexes-SRSMC, Université de Lorraine et CNRS, France, I carried out computational studies on new iron complexes for the use as dyes in Dye Sensitized Solar Cells (DSSC). Furthermore, thanks to this new expertise, I was involved in a collaboration for the study of the ligands’ interaction in biological systems.
A collaboration with University of Urbino allowed us to investigate on the reactivity of 1,2-diaza-1,3-dienes toward nucleophiles such as amino and phosphine derivatives, which led to the synthesis of new products some of which are 6 or 7 member heterocycles containing both phosphorus and nitrogen atoms.
Nonlinear Characterization and
Modelling of GaN HEMTs for
Microwave Power Amplifier
Applications
Creators: name: Niessen, Daniel <1983>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2013
Subjects: ING-INF/01 Elettronica

description: Semiconductors technologies are rapidly evolving driven by the need for higher
performance demanded by applications. Thanks to the numerous advantages that
it offers, gallium nitride (GaN) is quickly becoming the technology of reference
in the field of power amplification at high frequency. The RF power density of
AlGaN/GaN HEMTs (High Electron Mobility Transistor) is an order of magnitude
higher than the one of gallium arsenide (GaAs) transistors. The first demonstration
of GaN devices dates back only to 1993. Although over the past few years some
commercial products have started to be available, the development of a new
technology is a long process. The technology of AlGaN/GaN HEMT is not yet
fully mature, some issues related to dispersive phenomena and also to reliability
are still present. Dispersive phenomena, also referred as long-term memory effects,
have a detrimental impact on RF performances and are due both to the presence
of traps in the device structure and to self-heating effects. A better understanding
of these problems is needed to further improve the obtainable performances.
Moreover, new models of devices that take into consideration these effects are
necessary for accurate circuit designs. New characterization techniques are thus
needed both to gain insight into these problems and improve the technology and
to develop more accurate device models.
This thesis presents the research conducted on the development of new charac-
terization and modelling methodologies for GaN-based devices and on the use of
this technology for high frequency power amplifier applications.
Dusona terebrator
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Dusona
Dusona terebrator

description: Dusona terebrator (FÖRSTER, 1868)
M a t e r i a l e x a m i n e d: Trap 4: 1♀ 20.iv.-5.v., 1♀ 5-20.v.
D i s t r i b u t i o n: Transpalaearctic, known from Georgia (RIEDEL et al. 2018).
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 74, DOI: 10.5281/zenodo.10415120
Coordination between aminoacylation and editing to protect against proteotoxicity.pdf
Creators: name: Zhang, Hong
name: Ling, Jiqiang
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 310106
subject: Enzymes
classificationCode: 310113
subject: Synthetic biology
classificationCode: 320801
subject: Cell physiology
classificationCode: 310505
subject: Gene expression (incl. microarray and other genome-wide approaches)
classificationCode: 310510
subject: Molecular evolution
classificationCode: 310403
subject: Biological adaptation
classificationCode: 310606
subject: Industrial molecular engineering of nucleic acids and proteins
classificationCode: 310605
subject: Industrial microbiology (incl. biofeedstocks)
classificationCode: 310601
subject: Biocatalysis and enzyme technology

description: Aminoacyl-tRNA synthetases (aaRSs) are essential enzymes that ligate amino acids to tRNAs, and often require editing to ensure accurate protein synthesis. Recessive mutations in aaRSs cause various neur ological disorders in humans. Pathogenic aaRS mutations frequently cause protein destabilization and aminoacylation deficiency. In this study, we report that combined aminoacylation and editing defects cause severe proteotoxicity. We show that the ths1-C268A mutation in yeast threonyl-tRNA synthetase (ThrRS) abolishes editing and causes heat sensitivity . Surprisingly , experimental evolution of the mutant results in intragenic mutations that restore heat resistance but not editing. ths1-C268A destabilizes ThrRS and decreases overall Thr-tRNAThr synthesis, while the suppressor mutations in the evolved strains improve aminoacylation. We further show that deficiency in either ThrRS aminoacylation or editing is insufficient to cause heat sensitivity, and that ths1-C268A impairs ribosome-associated quality control. Our results suggest aminoacylation deficiency predisposes cells to proteotoxic stress.
Echthronomas tricincta
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Echthronomas
Echthronomas tricincta

description: Echthronomas tricincta (GRAVENHORST, 1829)
M a t e r i a l e x a m i n e d: Trap 7: 1♀ 13-27.vii., 1♀ 2♁♁ 24.viii.-7.ix., 1♀ 19.x.-3.xi.
D i s t r i b u t i o n: Western Palaearctic, known from Georgia (RIEDEL & JAPOSHVILI 2021).
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 74, DOI: 10.5281/zenodo.10415120
A vegetable farm planning model for primary producers
Creators: name: Short, C. Cameron
Publisher: name: University of British Columbia
Year: 2010

description: The objective of the thesis was to construct a deterministic single year, farm planning model that would enable vegetable producers to select an optimal farm plan from among alternative crops and crop production methods so as to maximize farm income consistent with technological and resource constraints and other goals. The model was to be readily adaptable to a wide range of commercial vegetable farmers in Canada but sufficiently flexible to be adaptable to the particular situation of a specific farm. A multiperiod linear programming model was built and validated through its application to a large commercial vegetable farm. The relevant theory of the firm was reviewed with special attention made to the theory's application to vegetable farms. The structure of a linear programming problem was discussed and related to the theory of the firm and vegetable farms. Special emphasis was placed on the problem of modeling the machinery used in vegetable production. The work of agricultural engineers was examined to determine the technological relationships involved in machine operation. Other crop budgeting models which involved the construction of similar planning models for a different sector of the agricultural community, especially the Purdue Crop Budgeting Models were reviewed. The model constructed was able to deal with machinery constraints by building a number of machine operating activities and tractor transfers so that the time constraint for a particular job would consist of any subset of the predefined set of time periods. Standard coefficients were prepared based on engineering formulae for fuel consumption and repair and maintenance costs for tractors. All inputs in the model except repair and maintenance costs were in physical units. This made it necessary to build several different types of purchasing or renting activities but facilitates the interpretation of data and the use of the model in a large number of different situations. The model was validated through its application to a large commercial vegetable farm in British Columbia. The model was run in simulation mode by forcing the model to follow the farm's 1974 crop plan and altering yields and prices to yields and prices that actually occured in that year. In this manner the reliability of the cost coefficients of the input data and the relationships between resources could be evaluated and compared with the results recorded in the farm's CANFARM records. The model was run in optimization mode with expected 1976 prices and yields to demonstrate the use of the model in selecting an optimal farm plan. A total of six plans were prepared based on alternate market and risk constraints and yields. These were compared with the plan selected by the farmer without the aid of the model. A detailed report on one of the farm plans v/as also prepared.
Blowup for the Euler and Euler-Poisson Equations with Repulsive Forces
Creators: name: Yuen, Manwai
Publisher: name: arXiv
Year: 2010
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35B44, 35Q35

description: In this paper, we study the blowup of the $N$-dim Euler or Euler-Poisson equations with repulsive forces, in radial symmetry. We provide a novel integration method to show that the non-trivial classical solutions $(ρ,V)$, with compact support in $[0,R]$, where $R>0$ is a positive constant and in the sense which $ρ(t,r)=0$ and $V(t,r)=0$ for $r\geq R$, under the initial condition% $H_{0}=\int_{0}^{R}rV_{0}dr>0$ blow up on or before the finite time $T=R^{3}/(2H_{0})$ for pressureless fluids or $γ>1.$ The main contribution of this article provides the blowup results of the Euler $(δ=0)$ or Euler-Poisson $(δ=1)$ equations with repulsive forces, and with pressure $(γ>1)$, as the previous blowup papers (\cite{MUK} \cite{MP}, \cite{P} and \cite{CT}) cannot handle the systems with the pressure term, for $C^{1}$ solutions.
description: Accepted by Nonlinear Analysis Series A: Theory, Methods & Applications Key Words: Euler Equations, Euler-Poisson Equations, Integration Method, Blowup, Repulsive Forces, With Pressure, $C^{1}$ Solutions, No-Slip Condition
Efficient Modelling Across Time of Human Actions and Interactions
Creators: name: Stergiou, Alexandros
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: This thesis focuses on video understanding for human action and interaction recognition. We start by identifying the main challenges related to action recognition from videos and review how they have been addressed by current methods. Based on these challenges, and by focusing on the temporal aspect of actions, we argue that current fixed-sized spatio-temporal kernels in 3D convolutional neural networks (CNNs) can be improved to better deal with temporal variations in the input. Our contributions are based on the enlargement of the convolutional receptive fields through the introduction of spatio-temporal size-varying segments of videos, as well as the discovery of the local feature relevance over the entire video sequence. The resulting extracted features encapsulate information that includes the importance of local features across multiple temporal durations, as well as the entire video sequence. Subsequently, we study how we can better handle variations between classes of actions, by enhancing their feature differences over different layers of the architecture. The hierarchical extraction of features models variations of relatively similar classes the same as very dissimilar classes. Therefore, distinctions between similar classes are less likely to be modelled. The proposed approach regularises feature maps by amplifying features that correspond to the class of the video that is processed. We move away from class-agnostic networks and make early predictions based on feature amplification mechanism. The proposed approaches are evaluated on several benchmark action recognition datasets and show competitive results. In terms of performance, we compete with the state-of-the-art while being more efficient in terms of GFLOPs. Finally, we present a human-understandable approach aimed at providing visual explanations for features learned over spatio-temporal networks.
description: PhD thesis
Reduced Dynamics from the Unitary Group to Some Flag Manifolds : Interacting Matrix Riccati Equations
Creators: name: Fujii, Kazuyuki
name: Oike, Hiroshi
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper we treat the time evolution of unitary elements in the N level system and consider the reduced dynamics from the unitary group U(N) to flag manifolds of the second type (in our terminology). Then we derive a set of differential equations of matrix Riccati types interacting with one another and present an important problem on a nonlinear superposition formula that the Riccati equation satisfies. Our result is a natural generalization of the paper {\bf Chaturvedi et al} (arXiv : 0706.0964 [quant-ph]).
description: Latex ; 13 pages ; no figure
Pearson Walk with Shrinking Steps in Two Dimensions
Creators: name: Serino, C. A.
name: Redner, S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the shrinking Pearson random walk in two dimensions and greater, in which the direction of the Nth is random and its length equals lambda^{N-1}, with lambda<1. As lambda increases past a critical value lambda_c, the endpoint distribution in two dimensions, P(r), changes from having a global maximum away from the origin to being peaked at the origin. The probability distribution for a single coordinate, P(x), undergoes a similar transition, but exhibits multiple maxima on a fine length scale for lambda close to lambda_c. We numerically determine P(r) and P(x) by applying a known algorithm that accurately inverts the exact Bessel function product form of the Fourier transform for the probability distributions.
description: 8 pages, 6 figures. Version 2: various corrections in response for referees. This is the final version for publication in JSTAT
QoS Challenges and Opportunities in Wireless Sensor/Actuator Networks
Creators: name: Xia, Feng
Publisher: name: arXiv
Year: 2008
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences
subject: C.2.1

description: A wireless sensor/actuator network (WSAN) is a group of sensors and actuators that are geographically distributed and interconnected by wireless networks. Sensors gather information about the state of physical world. Actuators react to this information by performing appropriate actions. WSANs thus enable cyber systems to monitor and manipulate the behavior of the physical world. WSANs are growing at a tremendous pace, just like the exploding evolution of Internet. Supporting quality of service (QoS) will be of critical importance for pervasive WSANs that serve as the network infrastructure of diverse applications. To spark new research and development interests in this field, this paper examines and discusses the requirements, critical challenges, and open research issues on QoS management in WSANs. A brief overview of recent progress is given.
description: 12 pages, 1 figure; review
Competing magnetic states in transition metal dichalcogenide moiré materials
Creators: name: Hu, Nai Chao
name: MacDonald, Allan H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Small-twist-angle transition metal dichalcogenide (TMD) heterobilayers develop isolated flat moiré bands that are approximately described by triangular lattice generalized Hubbard models [PhysRevLett.121.026402]. In this article we explore the metallic and insulating states that appear under different control conditions at a density of one-electron per moiré period, and the transitions between them. By combining fully self-consistent Hartree-Fock theory calculations with strong-coupling expansions around the atomic limit, we identify four different magnetic states and one nonmagnetic state near the model phase diagram's metal-insulator phase-transition line. Ferromagnetic insulating states, stabilized by non-local direct exchange interactions, are surprisingly prominent.
description: 12 pages, 7 figures
An Effective Hotel Recommendation System through Processing Heterogeneous Data
Creators: name: Forhad, Md Shafiul Alam
name: Arefin, Mohammad Shamsul
name: Kayes, A S M
name: Ahmed, Khandakar
name: Chowdhury, Mohammad Jabed Morshed
name: Kumara, Indika
Publisher: name: La Trobe
Year: 2023
Subjects: classificationCode: 40
subject: Engineering
classificationCode: 4009
subject: Electronics, sensors and digital hardware

description: Recommendation systems have recently gained a lot of popularity in various industries such as entertainment and tourism. They can act as filters of information by providing relevant suggestions to the users through processing heterogeneous data from different networks. Many travelers and tourists routinely rely on textual reviews, numerical ratings, and points of interest to select hotels in cities worldwide. To attract more customers, online hotel booking systems typically rank their hotels based on the recommendations from their customers. In this paper, we present a framework that can rank hotels by analyzing hotels’ customer reviews and nearby amenities. In addition, a framework is presented that combines the scores generated from user reviews and surrounding facilities. We perform experiments using datasets from online hotel booking platforms such as TripAdvisor and Booking to evaluate the effectiveness and applicability of the proposed framework. We first store the keywords extracted from reviews and assign weights to each considered unigram and bigram keywords and, then, we give a numerical score to each considered keyword. Finally, our proposed system aggregates the scores generated from the reviews and surrounding environments from different categories of the facilities. Experimental results confirm the effectiveness of the proposed recommendation framework.
The Mach cone signal and energy deposition scenarios in linearized hydrodynamics
Creators: name: Neufeld, R. B.
name: Renk, Thorsten
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Particle correlation measurements associated with a hard or semi-hard trigger in heavy-ion collisions may reflect Mach cone shockwaves excited in the bulk medium by partonic energy loss. This is of great interest because, when compared with theory, such measurements can provide information on the transport properties of the medium. Specifically, the formation of Mach cone shockwaves is sensitive to the viscosity and speed of sound, as well as the detailed nature of the jet medium interaction. However, modeling the physics of shockwave excitation to obtain a meaningful comparison with the measured correlations is very challenging since the correlations arise from an interplay of perturbative as well as non-perturbative phenomena at different momentum scales. In this work we take a step in that direction by presenting a systematic study of the dependence of azimuthal particle correlations on the spatio-temporal structure of energy deposition into the medium. Our results indicate that detailed modeling of the evolution of an initially produced hard parton and the interaction of this evolving state with the medium is crucial, as both magnitude and shape of the shockwave signal show a strong dependence on the assumptions being made.
description: Expanded version, as accepted for publication in the Physical Review C. Now contains better discussion and more figures, including the effect of modifying the speed of sound on our results
Inkrementelle Aktualisierungstechniken für Modelle und ihre Datenbankrepräsentation
Creators: name: Hahner, Sebastian
Publisher: name: Karlsruher Institut für Technologie (KIT)
Year: 2016

description: Modellgetriebene Software-Entwicklung (engl. Model Driven Software Development) steht für die Entwicklung von Software auf der Basis von Modellen. Diese stehen im Entwicklungsprozess auf einer Stufe mit Quelltext, der aus den Modellen generiert werden kann. Um die Arbeit im Team effizient zu ermöglichen, ist eine Synchronisierung der zu bearbeitenden Modelle nach einer Änderung zwischen allen Mitgliedern zwingend notwendig. Bei der Nutzung von Datenbanken zur Speicherung der Modelle ergeben sich dabei jedoch Probleme, da eine generierte Persistenzschicht häufig nur eine vollständige Ersetzung von bereits geladenen Elementen unterstützt. Eine Lösungsmöglichkeit ist die Detektion von Änderungen und die anschließende, inkrementelle Aktualisierung. Hierfür stehen bereits vorhandene Techniken zur Verfügung, welche kombiniert werden können. Im Rahmen dieser Arbeit sollten verschiedene Ansätze gefunden und anhand von Metriken bewertet werden. Eine Lösung des Problems ist die Kombination von aktiven Datenbanksystemen zur Änderungserkennung mit einer Persistenzschicht zur inkrementellen Aktualisierung einzelner Modellelemente. Bei der Untersuchung von UML-Modellen durchschnittlicher Größe (ca. 400 Elemente) ergibt sich bereits eine 25-fache Beschleunigung im Vergleich mit nicht-inkrementellen Methoden.
Effects of community, family, and life experience in immigrant families
Creators: name: Khiralla, Rebecca
Publisher: name: No Publisher Supplied
Year: 2025

description: The mental health and life functioning of second-generation immigrant (SGI) youth is critical to understand as the United States continues to diversify and little is known about the well-being of immigrant offspring. The research for SGI youth is inconclusive as some findings place some SGI youth at greater risk for internalizing disorders than their native counterparts and other data point to lower rates of psychiatric disorders. The conflicting findings may suggest multiple factors accounting for well-being. Perceived discrimination, family relationship (intergenerational conflict, family cohesion), and community buffering variables (national identity, local sense of belonging, ethnic identity, religious identity, religious participation) have been found to be associated with internalizing symptomology in diverse youth. These factors may be particularly impactful for SGI youth compared to their native counterparts. The current study evaluated these factors in 50 youth and young adults (n = 24 SGI; 26 non-SGI) between the ages of 9 and 20 who had previously been diagnosed with an anxiety or depressive disorder. Results demonstrated that depression was significantly associated with intergenerational conflict, ethnic identification, and national identification in hierarchical regression analysis. Anxiety was associated with intergenerational conflict. The interaction between intergenerational conflict and immigrant status on depression, intergenerational conflict and immigration status on anxiety, and local sense of belonging and immigration status on anxiety were significant. Contrary to the hypothesis, intergenerational conflict was more impactful in predicting depression for non-immigrants than SGIs. Additionally, local sense of belonging was more impactful in predicting anxiety for non-immigrants than SGIs. However, intergenerational conflict was more impactful on predicting anxiety in SGI youth than non-immigrant youth, as hypothesized. A multiple regression analysis assessing the simultaneous impact of all risk/protective factors signified that intergenerational conflict was the only significant predictor of depressive symptoms accounting for all others. The results suggest the importance of further investigation of immigration status and other societal, family, and community factors in understanding the development of well-being in SGI youth.
Hybrid portable systems for bio-nanosensors
Creators: name: Rossi, Michele <1982>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2013
Subjects: ING-INF/01 Elettronica

description: The promising development in the routine nanofabrication and the increasing knowledge of the working principles of new classes of highly sensitive, label-free and possibly cost-effective bio-nanosensors for the detection of molecules in liquid environment, has rapidly increased the possibility to develop portable sensor devices that could have a great impact on many application fields, such as health-care, environment and food production, thanks to the intrinsic ability of these biosensors to detect, monitor and study events at the nanoscale.
Moreover, there is a growing demand for low-cost, compact readout structures able to perform accurate preliminary tests on biosensors and/or to perform routine tests with respect to experimental conditions avoiding skilled personnel and bulky laboratory instruments.
This thesis focuses on analysing, designing and testing novel implementation of bio-nanosensors in layered hybrid systems where microfluidic devices and microelectronic systems are fused in compact printed circuit board (PCB) technology. In particular the manuscript presents hybrid systems in two validating cases using nanopore and nanowire technology, demonstrating new features not covered by state of the art technologies and based on the use of two custom integrated circuits (ICs).
As far as the nanopores interface system is concerned, an automatic setup has been developed for the concurrent formation of bilayer lipid membranes combined with a custom parallel readout electronic system creating a complete portable platform for nanopores or ion channels studies.
On the other hand, referring to the nanowire readout hybrid interface, two systems enabling to perform parallel, real-time, complex impedance measurements based on lock-in technique, as well as impedance spectroscopy measurements have been developed. This feature enable to experimentally investigate the possibility to enrich informations on the bio-nanosensors concurrently acquiring impedance magnitude and phase thus investigating capacitive contributions of bioanalytical interactions on biosensor surface.
title: Онтологическая модель взаимодействия пользователя с информационной системой в рамках получения услуги информационного сервиса
title: Ontological Model of User Interaction for the Purpose of Receiving Information Service
Creators: name: Курта, Павел Андреевич
name: Буйневич, Михаил Викторович
Publisher: name: Издательский центр СурГУ
Year: 2021

description: Исследуется взаимодействие пользователя с информационной системой в процессе решения различных задач в рамках предоставляемой информационным сервисом услуги. Проведен обзор существующих моделей, наиболее близких к данной предметной области. Обоснована необходимость использования онтологической модели, определяющей данный процесс, участвующие в нем объекты и их взаимосвязь. Предложена оригинальная авторская онтологическая модель, разработан понятийный аппарат, взаимосвязи и представление элементов в графическом и табличном виде (пользователь, задача, информационный сервис, запросный сервис, управляющий сервис, игровой сервис, информационная система, база данных, взаимодействие, схема, модель, сценарий, интерфейс, форма, графический элемент). Определены пути дальнейшего исследования и практического применения полученных результатов.
description: The interaction of the user with the information system in the process of solving various tasks within the service provided by the information service is investigated. The use of an ontological model, objects participating in it, and their interconnections are substantiated. For this, an overview of similar existing models to the subject area is used. An original author’s ontological model is proposed. It introduces the basic concepts such as a user, task, information service, request service, control service, game service, information system, database, interaction, scheme, model, script, interface, form, graphic element. The nesting of model elements into each other and interaction between them is indicated. The model is depicted in graphical and tabular form. The ways of further research and application predictions of the results are determined.