cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A parametric study on behaviour of granular piles
Creators: name: Mukherjee Rahul Vishwanath
name: Naveen, VL
name: Chauhan, Amar
name: Singh, Abhishek
name: Phanikumar, B. R
Publisher: name: Zenodo
Year: 2009

description: Granular piles have been a very widely used technique to improve the bearing capacity of soft clays and loose sand deposits. They are generally observed to fail by general shear failure, sliding failure and bulging failure. The stresses generated in a granular pile govern the settlement and the amount of bulging. These stresses are dependent upon various factors such as particle size of the granular pile material, consistency index of the ambient clay and dimensions of the granular pile apart from the vertical stress applied. This paper presents results from laboratory scale load tests on granular piles for studying load-settlement behaviour and bulge characteristics using fine sand, medium sand and coarse sand as pile materials. The consistency index (IC) of the surrounding clay was also varied as 40%, 50% and 60%. Plate load tests were conducted on granular piles alone using a test plate of diameter 60mm.
Curvature-induced geometric potential in strain-driven nanostructures
Creators: name: Ortix, Carmine
name: Kiravittaya, Suwit
name: Schmidt, Oliver G.
name: Brink, Jeroen van den
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We derive the effective dimensionally reduced Schödinger equation for electrons in strain-driven curved nanostructures by adiabatic separation of fast and slow quantum degrees of freedom. The emergent strain-induced geometric potential strongly renormalizes the purely quantum curvature-induced potential and enhances the effects of curvature by several orders of magnitude. Applying this analysis to nanocorrugated films shows that this curvature-induced potential leads to strongly enhanced electron localization and the opening of substantial band gaps.
description: 4 pages, 3 figures
Calibration of a bumble bee foraging model using Approximate Bayesian Computation
Creators: name: Baey, Charlotte
name: Smith, Henrik G.
name: Rundlöf, Maj
name: Olsson, Ola
name: Clough, Yann
name: Sahlin, Ullrika
Publisher: name: arXiv
Year: 2022
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: 1. Challenging calibration of complex models can be approached by using prior knowledge on the parameters. However, the natural choice of Bayesian inference can be computationally heavy when relying on Markov Chain Monte Carlo (MCMC) sampling. When the likelihood of the data is intractable, alternative Bayesian methods have been proposed. Approximate Bayesian Computation (ABC) only requires sampling from the data generative model, but may be problematic when the dimension of the data is high. 2. We studied alternative strategies to handle high dimensional data in ABC applied to the calibration of a spatially explicit foraging model for \textit{Bombus terrestris}. The first step consisted in building a set of summary statistics carrying enough biological meaning, i.e. as much as the original data, and then applying ABC on this set. Two ABC strategies, the use of regression adjustment leading to the production of ABC posterior samples, and the use of machine learning approaches to approximate ABC posterior quantiles, were compared with respect to coverage of model estimates and true parameter values. The comparison was made on simulated data as well as on data from two field studies. 3. Results from simulated data showed that some model parameters were easier to calibrate than others. Approaches based on random forests in general performed better on simulated data. They also performed well on field data, even though the posterior predictive distribution exhibited a higher variance. Nonlinear regression adjustment performed better than linear ones, and the classical ABC rejection algorithm performed badly. 4. ABC is an interesting and appealing approach for the calibration of complex models in biology, such as spatially explicit foraging models. However, while ABC methods are easy to implement, they require considerable tuning.
Aenictus Emery 1901
Creators: name: Gómez, Kiko
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Aenictus

description: rixator species group DIAGNOSIS. This is a convenience group, and a clear candidate to be split up when more data are available. Small, yellow species with linear mandibles and almost parallel sides closing against the clypeus. This very reduced, transverse to almost absent pronotum and mesonotum forming almost a straight line; mesopropodeal suture present dorsally but not deeply impressed. Femora and tibiae with its apical half swollen. Overall sculpture glassy smooth. Species in this group could be mistaken by its size and habitus with minima workers in the mariae complex, but can be separated by the linear mandibles and absence of denticulated clypeus. Its heads are also less elongated (CI~90 against CI~80) for the same HW range (~0.40) in the mariae group. OVERVIEW. The difference between A. rixator (Fig. 30 A–D) and A. mentu (Fig. 28 A–D) is quite straightforward as the first has three mandibular teeth and a clearly defined propodeal ridge, and the second lacks the propodeal ridge and has a big apical tooth followed by three smaller denticles.
description: Published as part of Gómez, Kiko, 2022, A revision of the Afrotropical species of the Dorylinae ant genus Aenictus (Hymenoptera: Formicidae) based on the worker caste, pp. 1-86 in Belgian Journal of Entomology 124 on page 45, DOI: 10.5281/zenodo.5898821
Measurements of Phase Dynamics in Planar Josephson Junctions and SQUIDs
Creators: name: Haxell, D. Z.
name: Cheah, E.
name: Křížek, F.
name: Schott, R.
name: Ritter, M. F.
name: Hinderling, M.
name: Belzig, W.
name: Bruder, C.
name: Wegscheider, W.
name: Riel, H.
name: Nichele, F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We experimentally investigate the stochastic phase dynamics of planar Josephson junctions (JJs) and superconducting quantum interference devices (SQUIDs) defined in epitaxial InAs/Al heterostructures, and characterized by a large ratio of Josephson energy to charging energy. We observe a crossover from a regime of macroscopic quantum tunneling to one of phase diffusion as a function of temperature, where the transition temperature $T^{*}$ is gate-tunable. The switching probability distributions are shown to be consistent with a small shunt capacitance and moderate damping, resulting in a switching current which is a small fraction of the critical current. Phase locking between two JJs leads to a difference in switching current between that of a JJ measured in isolation and that of the same JJ measured in an asymmetric SQUID loop. In the case of the loop, $T^*$ is also tuned by a magnetic flux.
Cooling of nanomechanical resonator by thermally activated single-electron transport
Creators: name: Santandrea, F.
name: Gorelik, L. Y.
name: Shekhter, R. I.
name: Jonson, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show that the vibrations of a nanomechanical resonator can be cooled to near its quantum ground state by tunnelling injection of electrons from an STM tip. The interplay between two mechanisms for coupling the electronic and mechanical degrees of freedom results in a bias-voltage dependent difference between the probability amplitudes for vibron emission and absorption during tunneling. For a bias voltage just below the Coulomb blockade threshold we find that absorption dominates, which leads to cooling corresponding to an average vibron population of the fundamental bending mode of 0.2.
description: 4 pages, 2 figures, submitted to Phys. Rev. Lett
Asymptotics for the rotating fluids and primitive systems with large ill-prepared initial data in critical spaces
Creators: name: Charve, Frederic
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this article we study the lifespan and asymptotics (in the large rotation and stratification regime) for the Primitive system for highly ill-prepared initial data in critical spaces. Compared to our previous works, we simplified the proof and made it adaptable to the Rotating fluids system with highly ill-prepared initial data decomposed as a sum of 2D horizontal part and a very large 3D part. We also provide explicit convergence rates.
Phantoms and strange attractors in cosmology
Creators: name: Russo, Jorge G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study a cosmological model of gravity coupled to three, self-interacting scalar fields, one of them with negative kinetic term. The theory has cosmological solutions described by three-dimensional quadratic autonomous equations, leading to strange attractors. The associated chaotic cosmologies exhibit highly fluctuating periods of contraction and expansion, alternating with long, steady periods in a de Sitter-like phase.
description: 12 pages, 6 figures
Macroderes arrowi Janssens 1939
Creators: name: Abdalla, Ishtiag H.
name: Deschodt, Christian M.
name: Scholtz, Clarke H.
name: Sole, Catherine L.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Macroderes
Macroderes arrowi

description: Macroderes arrowi Janssens, 1939
(Figs. 4, 59, 70)
Macroderes arrowi Janssens, 1939: 26; Ferreira 1969: 320; Frolov & Scholtz 2005: 389.
Type locality. South Africa, Cape Prov, 11 Km N v Rhynsdorp [Vanrhynsdorp: 31°37'S 18°44'E].
Type material examined. None. Type series is deposited in IRSNB (Frolov & Scholtz 2005).
Additional material examined. 2 ♂♂ and 2 ♀♀ (UPSA): “ RSA / Western Cape Prov / 11 Km / N of Vanthynsdorp / A. Frolov & C. Deschodt leg // AF-00 45 (25) / 5–11. IX. 2003 / S 31. 3028.28° E 018.4302.56°”; 2 ♀♀ (UPSA): “ South Africa / Western Cape Prov / 124 km N of / Sandveld / S31.49859° E018.71642° / 15. 8. 2015 / C. Deschodt & W. P. Strümpher leg”.
Size range. Males length: 9.9–11.7 mm, width: 6.3–8.3 mm; females length: 9.7–10.5 mm, width: 6.5–7.7 mm.
Differential diagnosis. Due to it is carinate margins of elytra (Fig. 70) M. arrowi resembles M. foveatus, M. cornutus and M. greeni, however, it can be easily distinguished from the two former species as it lacks the deep triangular concavity at the base of the pronotum (Fig. 4) and from all others by having a granular pronotum (Fig. 59) instead of rounded punctures found in M. greeni and longitudinal punctures in M. cornutus and M. foveatus.
Habitat and distribution. So far this species is only known from Vanrhynsdorp and Sandveld areas (Fig. 2). The two localities are situated in the Western Cape Province. Vanrhynsdorp is an arid area close to Namaqualand’s coast. The area is covered by succulent vegetation and characterised by rather humid climate and low annual rainfall. Sandveld situated to the west of the Cedarberg Mountains and is characterised by a rich biodiversity of animals and plants.
description: Published as part of Abdalla, Ishtiag H., Deschodt, Christian M., Scholtz, Clarke H. & Sole, Catherine L., 2018, An update to the taxonomy of the genus Macroderes Westwood 1842 (Coleoptera: Scarabaeidae: Scarabaeinae) with descriptions of new species from South Africa, pp. 41-75 in Zootaxa 4504 (1) on page 44, DOI: 10.11646/zootaxa.4504.1.3, http://zenodo.org/record/2606164
Aenictus mentu Weber 1942
Creators: name: Gómez, Kiko
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Aenictus
Aenictus mentu

description: Aenictus mentu Weber, 1942 Aenictus mentu WEBER, 1942: 40, fig. 2 (w.) Syntype, SOUTH SUDAN: Equatoria Region, Imatong Mountains (Neal A. Weber) 24 Jul- 5 Aug. 1939. (1w) [MCZC: ENT:26131] MCZC [Material seen on web]. The type material is located at the MCZC, but it wasn’t available for examination for this study. Also, no other specimens were found in any of the major museum collections that provided access or material loans. I have provisionally placed this species in the same group as A. rixator due to measurements from the type images (HW~0.40, CI~90), habitus, clypeal shape and mandibles. Based on paucity of material and the limited image quality, presently I have to refrain from offering a more accurate diagnosis or description until the types can be analyzed in detail. OTHER MATERIAL EXAMINED. Known only from the type series. DISTRIBUTION. North-East Africa, known only from the Type location in South Sudan (Fig. 29).
description: Published as part of Gómez, Kiko, 2022, A revision of the Afrotropical species of the Dorylinae ant genus Aenictus (Hymenoptera: Formicidae) based on the worker caste, pp. 1-86 in Belgian Journal of Entomology 124 on pages 45-46, DOI: 10.5281/zenodo.5898821
description: {"references": ["WEBER N. A., 1942. - New doryline, cerapachyine and ponerine ants from the Imatong Mountains, Anglo-Egyptian Sudan. Proceedings of the Entomological Society of Washington, 44: 40 - 49."]}
Vibrational states and disorder in continuously compressed model glasses
Creators: name: Léonforte, F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present in this paper a numerical study of the vibrational eigenvectors of a two-dimensional amorphous material, previously deeply studied from the point of view of mechanical properties and vibrational eigen-frequencies [7-10]. Attention is paid here to the connection between the mechanical properties of this material in term of elastic heterogeneities (EH), and how these inherent heterogeneous structures affect the vibrational eigenvectors and their plane waves decomposition. The systems are analysed for different hydrostatic pressures, and using results from previous studies, a deeper understanding of the boson peak scenario is obtained. The vibrational spectrum of a continuously densified silica glass is also studied, from which it appears that the pulsation associated with the boson peak follows the same pressure dependence trend than that of transverse waves with pulsation associated with the EH characteristic size.
description: 9 pages, 12 figures
Online greedy identification of linear dynamical systems
Creators: name: Blanke, Matthieu
name: Lelarge, Marc
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This work addresses the problem of exploration in an unknown environment. For linear dynamical systems, we use an experimental design framework and introduce an online greedy policy where the control maximizes the information of the next step. In a setting with a limited number of experimental trials, our algorithm has low complexity and shows experimentally competitive performances compared to more elaborate gradient-based methods.
description: 17 pages, 2 figures
A 3d printing and moulding method of the fabrication of a miniature voice coil motor actuator
Creators: name: Yuan, Kaiwen
Publisher: name: University of British Columbia
Year: 2015

description: The goal of this project is to apply 3D printing and moulding (3DPM) methods for the fabrication of a miniature magnetic actuator for optical image stabilization (OIS) applications. Polydimethylsiloxane (PDMS) and strontium ferrite (SrFe) nano powder were used as the main structural material. Young’s modulus and the magnetization of the material with SrFe-doping ratios ranging from 20% to 60% by weight were characterized. The actuator, consisting of four coils, an actuating plate, and a base supporter was assembled and tested with a Laser Doppler Velocimetry (LDV) system. A tilting angle of 0.6º was achieved with the application of 500 mA (50 turns/9 mm long coils). A Taguchi’s orthogonal experimental design was used in the finite element analysis (FEA) simulation to examine the effect of dimension variations on the eigenfrequencies. Frequency response of the actuator was characterized and the experimental results matched with the simulation results between 1 and 450 Hz showing less than 5% errors. A series of replica experiments were also performed and analyzed.
Lower bounds on the Hausdorff dimension of some Julia sets
Creators: name: Dudko, Artem
name: Gorbovickis, Igors
name: Tucker, Warwick
Publisher: name: arXiv
Year: 2022
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We present an algorithm for a rigorous computation of lower bounds on the Hausdorff dimensions of Julia sets for a wide class of holomorphic maps. We apply this algorithm to obtain lower bounds on the Hausdorff dimension of the Julia sets of some infinitely renormalizable real quadratic polynomials, including the Feigenbaum polynomial $p_{\,\mathrm{Feig}}(z)=z^2+c_{\,\mathrm{Feig}}$. In addition to that, we construct a piecewise constant function on $[-2,2]$ that provides rigorous lower bounds for the Hausdorff dimension of the Julia sets of all quadratic polynomials $p_c(z) = z^2+c$ with $c \in [-2,2]$. Finally, we verify the conjecture of Ludwik Jaksztas and Michel Zinsmeister that the Hausdorff dimension of the Julia set of a quadratic polynomial $p_c(z)=z^2+c$, is a $C^1$-smooth function of the real parameter $c$ on the interval $c\in(c_{\,\mathrm{Feig}},-3/4)$.
description: 23 pages, 7 figures
Spaces of Positive Scalar Curvature metrics on totally nonspin Manifolds with spin boundary
Creators: name: Frenck, Georg
Publisher: name: arXiv
Year: 2022
Subjects: subject: Differential Geometry (math.DG)
subject: Algebraic Topology (math.AT)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: In this article we study the space of positive scalar curvature metrics on totally nonspin manifolds with spin boundary. We prove that for such manifolds of certain dimensions, those spaces are not connected and have nontrivial fundamental group. Furthermore we show that a well-known propagation technique for detection results on spaces of positive scalar curvature metrics on spin manifolds ceases to work in the totally nonspin case.
description: 14 pages, 2 figures. Accepted for publication in Mathematische Zeitschrift. Video abstract available here: https://www.youtube.com/watch?v=ew3is8UTw6k
The behavioural effects of stress and aluminium toxicity on a mouse model of amyotrophic lateral sclerosis parkinsonism-dementia complex
Creators: name: Bannon, Darryl
Publisher: name: University of British Columbia
Year: 2015

description: Background: The etiology of idiopathic neurodegenerative diseases such as Parkinson’s disease (PD) and amyotrophic lateral sclerosis (ALS) remain unclear. However, it is likely that some combination of genetic susceptibility, environmental toxins and lifestyle factors precipitate onset in an aging-dependent manner. In order to better understand these complex relationships, this thesis investigated two multi-hit hypotheses. These multi-hit hypotheses involved combining a toxin induced neurodegenerative murine model with an environmental factor, aluminum, and separately with a lifestyle factor, stress. The model of progressive age-related neurodegenerative disease that was used to assess these multi-hit hypotheses was the stigmasterol beta-D-glucoside (SG) dietary toxin mouse model of amyotrophic lateral sclerosis – parkinsonism dementia complex (ALS-PDC). The SG dietary toxin is found in the cycad tree, a type of which is native to Guam, and whose ingestion is believed responsible for the unusually high levels of neurodegenerative disease which were found there in the mid-twentieth century. The inclusion of water-borne aluminum as part of a multi-hit model was based on previous research epidemiologically linking high levels of aluminum in water and soil in Guam to the ALS-PDC phenotype. The lifestyle factor which was applied to the ALS-PDC model was exogenously administered chronic stress, which in humans can result in neurodegeneration and impaired neurogenesis. The prediction was that these two hits, one environmental and one lifestyle related, would exacerbate the behavioural ALS-PDC symptoms. Results: The combination of water-borne aluminum with the ALS-PDC murine model did not lead to behavioural motor impairments beyond what was seen with aluminum alone. However, anxiogenic phenotypes were observed for both aluminum and the combination of aluminum and the SG toxin relative to controls. The application of chronic restraint stress to the ALS-PDC murine model revealed a significant reduction in gait disturbances relative to what was seen with restraint stress alone. Conclusion: The results suggest that both restraint stress and aluminum can mediate behavioural outcomes in the SG induced murine model of ALS-PDC. However, the high degree of variability within the results suggests that, as is observed with clinical cases of age-related neurodegenerative disease, individual susceptibility is a core determinant of disease progression.
Aenictus
Creators: name: Gómez, Kiko
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Aenictus

description: rotundatus species group DIAGNOSIS. Species with triangular mandibles which close tightly against clypeus and with a developed sharp apical tooth followed by a series of denticles (4–10). Other common characters are: Clypeus a row of 8–10 triangular denticles, sometimes hardly visible when mandibles closed. Parafrontal ridges weakly developed but present, never extending from the antennal sockets, visible as a faint striae in lateral view and weakly dentiform basally. Femora and tibiae with its apical half swollen. Setation variable, but with dorsopropodeum always bare, except adjacent to mesopropodeal suture and propodeal declivity. Workers may present wide variation in size, even with a marked allometry (e. g. mariae complex). OVERVIEW. This group gathers eleven species. Numerical analysis for SIL shows a bimodal distribution, which I have arbitrarily used to divide the group in two species complexes which are useful for identification purposes. The mariae complex gathers the four species with very short scapes (SIL <57), while the rotundatus complex comprises the species with SIL>60. Identification of minima workers may be difficult in some cases, and using major workers for this purpose is highly encouraged.
description: Published as part of Gómez, Kiko, 2022, A revision of the Afrotropical species of the Dorylinae ant genus Aenictus (Hymenoptera: Formicidae) based on the worker caste, pp. 1-86 in Belgian Journal of Entomology 124 on pages 48-49, DOI: 10.5281/zenodo.5898821
Numerical study of the transverse stability of line solitons of the Zakharov-Kuznetsov equations
Creators: name: Klein, Christian
name: Saut, Jean-Claude
name: Stoilov, Nikola
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We present a detailed numerical study of the stability under periodic perturbations of line solitons of two-dimensional, generalized Zakharov-Kuznetsov equations with various power nonlinearities. In the $L^{2}$-subcritical case, in accordance with a theorem due to Yamazaki we find a critical speed, below which the line soliton is stable. For higher velocities, the numerical results indicate an instability against the formation of lumps, solitons localized in both spatial directions. In the $L^2$-critical and supercritical cases but subcritical for the 1D generalized Korteweg-de Vries equation), the line solitons are shown to be numerically stable for small velocities, and strongly unstable for large velocities, with a blow-up observed in finite time.
description: New figures added
In-beam gamma-ray spectroscopy of 35Mg and 33Na
Creators: name: Gade, A.
name: Bazin, D.
name: Brown, B. A.
name: Campbell, C. M.
name: Cook, J. M.
name: Ettenauer, S.
name: Glasmacher, T.
name: Kemper, K. W.
name: McDaniel, S.
name: Obertelli, A.
name: Otsuka, T.
name: Ratkiewicz, A.
name: Terry, J. R.
name: Utsuno, Y.
name: Weisshaar, D.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Excited states in the very neutron-rich nuclei 35Mg and 33Na were populated in the fragmentation of a 38Si projectile beam on a Be target at 83 MeV/u beam energy. We report on the first observation of gamma-ray transitions in 35Mg, the odd-N neighbor of 34Mg and 36Mg, which are known to be part of the "Island of Inversion" around N = 20. The results are discussed in the framework of large- scale shell-model calculations. For the A = 3Z nucleus 33Na, a new gamma-ray transition was observed that is suggested to complete the gamma-ray cascade 7/2+ --> 5/2+ --> 3/2+ gs connecting three neutron 2p-2h intruder states that are predicted to form a close-to-ideal K = 3/2 rotational band in the strong-coupling limit.
description: Accepted for publication Phys. Rev. C. March 16, 2011: Replaced figures 3 and 5. We thank Alfredo Poves for pointing out a problem with the two figures
Aenictus Emery 1895
Creators: name: Gómez, Kiko
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Aenictus

description: mariae species complex DIAGNOSIS. Yellow to light brown species, with very short scapes (46 <SIL <57) and small to medium size (0.28 <HW <0.69). Propodeal ridge always absent, though a thin dark line might be present in major workers, but never projecting as a shelf dorsally. OVERVIEW. This complex comprises four similar small yellowish species. Three are restricted to Southern Africa and Eastern Africa and present a marked allometry, with the major workers with more square heads (A. hitai sp. nov., A. mariae and A. steindachneri) and the fourth species A. boltoni sp. nov. is monomorphic and West African. Aenictus steindachneri presents the lateropropodeum covered with a short, white abundant pubescence, while is bare except for some isolated setae in the other three; A. hitai sp. nov. is the most sculptured species in the complex with its dorsopropodeum reticulated-punctuated (even in the minima workers), which is smooth in the rest of species. Aenictus boltoni sp. nov. and A. mariae are very similar species separable by minor differences in the metanotal suture and postpetiolar shape, also their distribution does not seem to overlap, with A. boltoni sp. nov. distributed in Western Africa and Congo basin and A. mariae restricted to Southern Africa.
description: Published as part of Gómez, Kiko, 2022, A revision of the Afrotropical species of the Dorylinae ant genus Aenictus (Hymenoptera: Formicidae) based on the worker caste, pp. 1-86 in Belgian Journal of Entomology 124 on page 49, DOI: 10.5281/zenodo.5898821
Rebuttal to "Comment by V.M. Krasnov on 'Counterintuitive consequence of heating in strongly-driven intrinsic junctions of Bi2Sr2CaCu2O8+d Mesas' "
Creators: name: Kurter, C.
name: Ozyuzer, L.
name: Proslier, T.
name: Zasadzinski, J. F.
name: Hinks, D. G.
name: Gray, K. E.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In our article [1], we found that with increasing dissipation there is a clear, systematic shift and sharpening of the conductance peak along with the disappearance of the higher-bias dip/hump features (DHF), for a stack of intrinsic Josephson junctions (IJJs) of intercalated Bi2Sr2CaCu2O8+δ (Bi2212). Our work agrees with Zhu et al [2] on unintercalated, pristine Bi2212, as both studies show the same systematic changes with dissipation. The broader peaks found with reduced dissipation [1,2] are consistent with broad peaks in the density-of-states (DOS) found among scanning tunneling spectroscopy [3] (STS), mechanical contact tunneling [4] (MCT) and inferred from angle (momentum) resolved photoemission spectroscopy [5] (ARPES); results that could not be ignored. Thus, sharp peaks are extrinsic and cannot correspond to the superconducting DOS. We suggested that the commonality of the sharp peaks in our conductance data, which is demonstrably shown to be heating-dominated, and the peaks of previous intrinsic tunneling spectroscopy (ITS) data implies that these ITS reports might need reinterpretation.
description: Rebuttal to Comment of Krasnov arXiv:1007.4510
A STUDY ON THE ANALYSIS OF THE IMPACT OF TECHNICAL AND SKILL-BASED TRAINING NEEDS ASSESSMENT ON EMPLOYEES AT KAVIN IRRIGATION PRIVATE LTD, KARUR
Creators: name: Aruna.P
name: Dr.P.Vanitha
Publisher: name: Zenodo
Year: 2025
Subjects: Training Needs Assessment, Employee Performance, Skill Development, Job Satisfaction, Productivity, Organizational Competitiveness, Employee Engagement, Workforce Development, Technical Training, Skill-Based Training

description: This study examines the impact of technical and skill-based training needs assessment on employees at Kavin Irrigation Private Ltd, Karur. The research investigates how training assessments influence employee performance, job satisfaction, productivity, and organizational competitiveness. A well-structured training needs assessment helps bridge skill gaps, enhances adaptability to technological advancements, and fosters employee engagement. The study employs a descriptive research approach, collecting data through employee surveys and analyzing training records. Findings suggest that effective training assessments contribute significantly to job efficiency, innovation, and retention. The study highlights the need for organizations to implement structured training assessments to ensure long-term workforce development and organizational growth.
Studying moderate/strong seismic deformation events with Geohazards TEP - An overview of 2018
Creators: name: Valkaniotis, Sotiris
Publisher: name: Zenodo
Year: 2019
Subjects: InSAR
Earthquakes
Surface faulting
Deformation

description: Presentation from the 11th CEOS WG Disasters Meeting, in Athens, Greece (Geohazards Lab - Seismic Demonstrator).

An overview of studying moderate/major earthquake events between Dec 2017 and Dec 2018. Primary and secondary faulting, ground deformation and earthquake environmental effects investigated & mapped using Geohazards TEP tools and Sentinel-1/2 satellite imagery.
Mass Renormalization in Lattice Simulations of False Vacuum Decay
Creators: name: Braden, Jonathan
name: Johnson, Matthew C.
name: Peiris, Hiranya V.
name: Pontzen, Andrew
name: Weinfurtner, Silke
Publisher: name: arXiv
Year: 2022
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: False vacuum decay, a quantum mechanical first-order phase transition in scalar field theories, is an important phenomenon in early universe cosmology. Recently, real-time semi-classical techniques based on ensembles of lattice simulations were applied to the problem of false vacuum decay. In this context, or any other lattice simulation, the effective potential experienced by long-wavelength modes is not the same as the bare potential. To make quantitative predictions using the real-time semi-classical techniques, it is therefore necessary to understand the redefinition of model parameters and the corresponding deformation of the vacuum state, as well as stochastic contributions that require modeling of unresolved subgrid modes. In this work, we focus on the former corrections and compute the expected modification of the true and false vacuum effective mass, which manifests as a modified dispersion relationship for linear fluctuations about the vacuum. We compare these theoretical predictions to numerical simulations and find excellent agreement. Motivated by this, we use the effective masses to fix the shape of a parameterized effective potential, and explore the modeling uncertainty associated with non-linear corrections. We compute the decay rates in both the Euclidean and real-time formalisms, finding qualitative agreement in the dependence on the UV cutoff. These calculations further demonstrate that a quantitative understanding of the rates requires additional corrections.
description: 15 pages, 5 figures, accepted. Additional clarifications added. Main results unchanged
Critical properties of complex fitness landscapes
Creators: name: Østman, Bjørn
name: Hintze, Arend
name: Adami, Christoph
Publisher: name: arXiv
Year: 2010
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Biological sciences

description: Evolutionary adaptation is the process that increases the fit of a population to the fitness landscape it inhabits. As a consequence, evolutionary dynamics is shaped, constrained, and channeled, by that fitness landscape. Much work has been expended to understand the evolutionary dynamics of adapting populations, but much less is known about the structure of the landscapes. Here, we study the global and local structure of complex fitness landscapes of interacting loci that describe protein folds or sets of interacting genes forming pathways or modules. We find that in these landscapes, high peaks are more likely to be found near other high peaks, corroborating Kauffman's "Massif Central" hypothesis. We study the clusters of peaks as a function of the ruggedness of the landscape and find that this clustering allows peaks to form interconnected networks. These networks undergo a percolation phase transition as a function of minimum peak height, which indicates that evolutionary trajectories that take no more than two mutations to shift from peak to peak can span the entire genetic space. These networks have implications for evolution in rugged landscapes, allowing adaptation to proceed after a local fitness peak has been ascended.
description: 7 pages, 6 figures, requires alifex11.sty. To appear in Proceedings of 12th International Conference on Artificial Life
Double Diffusion Maps and their Latent Harmonics for Scientific Computations in Latent Space
Creators: name: Evangelou, Nikolaos
name: Dietrich, Felix
name: Chiavazzo, Eliodoro
name: Lehmberg, Daniel
name: Meila, Marina
name: Kevrekidis, Ioannis G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Dynamical Systems (math.DS)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We introduce a data-driven approach to building reduced dynamical models through manifold learning; the reduced latent space is discovered using Diffusion Maps (a manifold learning technique) on time series data. A second round of Diffusion Maps on those latent coordinates allows the approximation of the reduced dynamical models. This second round enables mapping the latent space coordinates back to the full ambient space (what is called lifting); it also enables the approximation of full state functions of interest in terms of the reduced coordinates. In our work, we develop and test three different reduced numerical simulation methodologies, either through pre-tabulation in the latent space and integration on the fly or by going back and forth between the ambient space and the latent space. The data-driven latent space simulation results, based on the three different approaches, are validated through (a) the latent space observation of the full simulation through the Nyström Extension formula, or through (b) lifting the reduced trajectory back to the full ambient space, via Latent Harmonics. Latent space modeling often involves additional regularization to favor certain properties of the space over others, and the mapping back to the ambient space is then constructed mostly independently from these properties; here, we use the same data-driven approach to construct the latent space and then map back to the ambient space.
description: 25 pages,21 figures, 4 tables
Spin-Torque Diode Measurements of MgO-Based Magnetic Tunnel Junctions with Asymmetric Electrodes
Creators: name: Matsumoto, R.
name: Chanthbouala, A.
name: Grollier, J.
name: Cros, V.
name: Fert, A.
name: Nishimura, K.
name: Nagamine, Y.
name: Maehara, H.
name: Tsunekawa, K.
name: Fukushima, A.
name: Yuasa, S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a detailed study of the spin-torque diode effect in CoFeB/MgO/CoFe/NiFe magnetic tunnel junctions. From the evolution of the resonance frequency with magnetic field at different angles, we clearly identify the free-layer mode and find an excellent agreement with simulations by taking into account several terms for magnetic anisotropy. Moreover, we demonstrate the large contribution of the out-of-plane torque in our junctions with asymmetric electrodes compared to the in-plane torque. Consequently, we provide a way to enhance the sensitivity of these devices for the detection of microwave frequency.
The effects of channel morphology on the mobility and dispersion of sediment in a small gravel-bed stream
Creators: name: Papangelakis, Elli
Publisher: name: University of British Columbia
Year: 2015

description: The role of channel morphology in sediment transport is poorly understood due to the complexity of the interactions between morphology, sediment characteristics and flow. A better understanding of the ways in which channel morphology affects sediment transport at all scales and under varying flow conditions can improve predictions of channel behavior and provide insights for better stream restoration applications. This study aimed to capture the effects of morphology on bed mobility and sediment dispersion in a small gravel-bed stream through the use of a 10 year tracer dataset. The characterization of bed mobility and sediment dispersion conducted at three spatial scales (the reach, morphological unit and local scale), revealed the importance of scale when examining the role or morphology on sediment transport. East Creek was found to be in conditions of marginal sediment transport, remaining near the critical conditions for sediment mobilization the majority of the time, and falling within a low sediment transport regime common in small gravel-bed streams. Both bed mobility and tracer travel distances increased with increasing flow conditions, and measures of cumulative flow energy had stronger relations to both variables than peak discharge. Grain size was not found to play no role in bed mobility or travel distance in East Creek. At the reach scale, morphology did not affect bed mobility, and influenced the travel distance of tracers only during high flows, or when averaged over long time periods. Although burial rates were high, burial depths were shallow, and burial showed no relation to flow or mobility. At the morphological unit scale, differences were observed in the rate of increase of bed area under mobility with increasing flow between reaches and between morphological units. Finally, at the local scale, bed mobility was highly localized and sporadic. Results of this study allow for the description of the role of morphology on bed mobility and sediment dispersion in a low sediment transport regime and throughout various spatial and temporal scales. Further research opportunities include the exploration of the role of morphology on bed mobility and sediment dispersion in a variety of morphological and sediment transport settings.
Phase Information in Cosmological Collider Signals
Creators: name: Qin, Zhehan
name: Xianyu, Zhong-Zhi
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Massive particles produced during the cosmic inflation can imprint in the primordial non-Gaussianities as characteristic oscillating functions of various momentum ratios, known as cosmological collider signals. We initiate a study of the phase of the oscillating signals which can be unambiguously defined and measured. The phase can provide useful new information about the spin and the couplings of the intermediate heavy particles that cannot be obtained from the signal frequency and angular dependences alone. We also present new analytical results for full nonlocal signals from two typical 1-loop processes, enabling precise determination of the signal phase away from the squeezed limit.
description: 53 pages. v2: Minor corrections; New references added. v3: Minor corrections
Herschel-SPIRE, Far-Infrared Properties of Millimetre-Bright and -Faint Radio Galaxies
Creators: name: Chapman, S. C.
name: Ivison, R. J.
name: Roseboom, I. G.
name: Auld, R.
name: Bock, J.
name: Brisbin, D.
name: Burgarella, D.
name: Chanial, P.
name: Clements, D. L.
name: Cooray, A.
name: Eales, S.
name: Franceschini, A.
name: Giovannoli, E.
name: Glenn, J.
name: Griffin, M.
name: Mortier, A. M. J.
name: Oliver, S. J.
name: Omont, A.
name: Page, M. J.
name: Papageorgiou, A.
name: Pearson, C. P.
name: Pérez-Fournon, I.
name: Pohlen, M.
name: Rawlings, J. I.
name: Raymond, G.
name: Rodighiero, G.
name: Rowan-Robinson, M.
name: Scott, Douglas
name: Seymour, N.
name: Smith, A. J.
name: Symeonidis, M.
name: Tugwell, K. E.
name: Vaccari, M.
name: Vieira, J. D.
name: Vigroux, L.
name: Wang, L.
name: Wright, G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: (abridged) We present the first study of the farIR properties of high redshift, radio-selected ULIRGs using deep observations obtained with SPIRE from the Herschel Multi-tiered Extragalactic Survey (HerMES). These galaxies span a large range of 850um fluxes from submillimetre-luminous ~10mJy "SCUBA galaxies -- SMGs" to ~1.5mJy from stacked SCUBA non-detections, thus likely representing a complete distribution of ULIRG spectral energy distributions. From Keck spectroscopic surveys in the Lockman-North field we identified a sample of 31 SMGs and 37 submillimetre-faint, optically-faint radio galaxies (OFRGs), all with radio-inferred IR luminosities >10^12 Lsun. These galaxies were cross-identified with SPIRE 250, 350 and 500um catalogs based on fluxes extracted at 24um positions in the SWIRE survey, yielding a sample of more than half of the galaxies well detected in at least two of the SPIRE bandpasses. By fitting greybody dust models to the SPIRE photometry together with SCUBA 850um measurements, we infer dust temperatures and far-infrared luminosities. The OFRGs detected by SPIRE have median = 41+-5 K and the SMGs have = 34+-5 K, both in reasonable agreement with previous (pre-Herschel) estimates, reaffirming that the local FIR/radio correlation holds (at least for this subset of high-z ULIRGs) at high redshift. Our observations firstly confirm that a substantial fraction of OFRGs exhibit large infrared luminosities corresponding to SFRs of ~400 Msun/yr. The SPIRE observations secondly confirm the higher dust temperatures for these OFRGs than similarly selected SMGs, consistent with early predictions of the submm-faint radio populations. Our observations also clearly confirm the large infrared luminosities of most SMGs selected with S850um>5 mJy and radio and strong 24um detections, corresponding to SFRs of ~700 Msun/yr.
description: 7 pages, 3 figures, accepted in MNRAS for Herschel special issue
Arrangement for $K_2^*$ meson family
Creators: name: Li, Ting-yan
name: Wang, Ya-rong
name: Pang, Cheng-qun
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Two observed structures with $M=1868 \pm 8^{+ 40}_{- 57}$ MeV and $M=2073 \pm 94^{+ 245}_{- 240}$ MeV are the same states ($K_2^*(1980)$) in PDG.The analysis of the mass spectrum and the calculation of the strong decay of $K_2^*$ mesons support the low mass state of $K_2^*(1980)$ as $2^3P_2$ and the high mass state of $K_2^*(1980)$ as $1^3F_2$ in this letter. This analysis brings us very important criterion for the assignment of the observed $K_2^* (1980)$ and experimental findings for this assignment is suggested. Additionally, prediction of some partial decay widths are made on the high excitations of $K_2^*$ family. This study is crucial to establishing and searching for their higher excitations in the future.
description: 9 pages, 6 figures. arXiv admin note: text overlap with arXiv:1810.02694
Novel protocols for the two-hop half-duplex relay network
Creators: name: Zlatanov, Nikola
Publisher: name: University of British Columbia
Year: 2015

description: Wireless communication has enabled people to be connected from anywhere and at any time. This has had a profound impact on human society. Currently, wireless communication is performed using the communication protocols developed for cellular and wireless local area networks. Although these protocols support a broad range of mobile services, they do not fully exploit the capacity of the underlying networks and cannot satisfy the exponential growth in demand for higher data rates and more reliable connections. Therefore, new communication protocols have to be developed for general wireless networks in order to meet this demand. Ultimately, these protocols will have to be able to reach the fundamental limits of information flow in wireless networks, i.e., the network capacity. However, due to the complexity of the problem, it is currently not known how to design such protocols for general wireless networks. Therefore, in order to get insight into this problem, as a first step, communication protocols for very simple wireless networks have to be devised. Later, the gained knowledge can be exploited to design protocols for more complex networks. In this thesis, we propose new communication protocols for the simplest half-duplex relay network, which is also the most basic building block of any wireless network, the two-hop half-duplex relay network. This network is comprised of a source, a half-duplex relay, and a destination where a direct source-destination link is not available. For the considered relay network, we propose three novel communication protocols. The first proposed protocol achieves the capacity of the considered network when fading on the source-relay and relay-destination links is not present. The second and third protocols significantly improve the average data rate and the outage probability, respectively, of the considered network when both the source-relay and the relay-destination links are affected by fading.