129 research outputs found
Unexpected aggregation induced circular dichroism, circular polarized luminescence and helical assembly from achiral hexaphenylsilole (HPS)
No full textThis work provides the finding of aggregation-induced circular dichroism (AICD), optical properties and helical assemblies of pi-pi conjugated molecule hexaphenylsilole (HPS). As an achiral molecule, HPS was found to exhibit unusual AICD and circular polarized luminescence (CPL). Upon aggregation, it self-assembled into fluorescent helical nanofiber and nanotubes. Theoretical modeling suggests that van der Waals interaction between HPS monomers plays an essential role in the formation of helical nanofibers. These kinds of molecules have important applications given the increasing demand of miniaturized optics and electronic devices.National Natural Science Foundation of China [21574085]; National Natural Science Foundation of Guangdong province [2016A030312002]SCI(E)ARTICLE4024841-24847
DISCOVERY OF THE ELECTRONIC SPECTRA OF HPS AND DPS
No full textAuthor Institution: Department of Chemistry, University of Kentucky, Lexington, KY, 40506; Department of Chemistry, Brookhaven National Lab, Upton, NY 11973The hitherto unknown electronic spectrum of the closed shell transient molecule HPS has been observed in the 685 - 846 nm region by laser-induced fluorescence and single vibronic level emission techniques. HPS (and DPS) were produced in a pulsed electric discharge jet using a precursor mixture of 3\% PH and 1\% HS (or PD and DS) in high pressure argon. The weak set of observed bands are assigned to the ^1^1 electronic transition on the basis of chemical evidence, isotope shifts and the correspondence of the vibrational frequencies, excitation energy, and band contours with predictions based on our own high level {\em ab initio} calculations. Theory predicts that the HPS bond angle decreases on electronic excitation, contrary to expectations based on Walsh diagrams
A review of small heat pipes for electronics
No full textHeat pipes (HPs) have received considerable attention in recent decades, especially in the field of cooling electronics, which requires the removal of added heat from an area of limited volume to the environment. Small HPs are widely used in electronic applications, which are normally limited by the compact structure and dimensions of the electronic device. Among small HPs, mini/micro HPs and two-phase loops (TPLs) with mini/micro wicks, including loop HPs (LHPs) and capillary pumped loops (CPLs), are preferred for their high efficiency, small dimensions, and compatible process with semiconductor devices. Particularly, TPLs possess all of the main advantages of traditional HPs with the addition of special properties that enable the transfer of heat for distances up to several metres at any orientation in the gravity field. Further, small vapour chambers (VCs), also referred to as flat HPs, are excellent candidates for electronic heat spreaders due to their light weight, geometric flexibility, and extremely high thermal conductivities. Because silicon is widely used in electronics, it is a preferred material for mini/micro HPs along with TPLs. Moreover, polymer-based small HPs are highly attractive for further development as they are inexpensive and easy to fabricate. Because the smaller wicks supply a greater capillary force, nano wicks, such as carbon nanotubes (CNTs), may represent the future of HPs due to their potentially outstanding characteristics. In this work, a review of small HPs, including their design, analysis, and fabrication, is presented.Accepted author manuscriptElectronic Components, Technology and Material
THE PURE ROTATIONAL SPECTRUM OF HPS (\ {X}A): THE THIRD ROW ANALOG OF HNO
No full textAuthor Institution: Department of Chemistry, Department of Astronomy, and Steward Observatory, University of Arizona, Tucson, AZ 85721; Department of Chemistry, University of Kentucky, Lexington, KY 40506; Department of Chemistry, Department of Astronomy, and Steward Observatory, University of Arizona, Tucson, AZ 85721The pure rotational spectrum of HPS (\~{X}A) has been measured using millimeter-wave direct absorption techniques in the range 229-415 GHz. This work is the first laboratory detection of this species in the gas phase. This molecule was created by the reaction of gas-phase phosphorus and HS in the presence of argon carrier gas and an AC glow discharge. The pattern of the rotational spectrum clearly indicated the presence of an asymmetric top. HPS, like HNO, has a bent structure. Data have been recorded for multiple K components from K = 0 to 6. The data have been fit with an asymmetric top Hamiltonian, and the spectroscopic parameters have been determined. The structure established from the rotational constants is in excellent agreement with ab initio calculations. Comparison with HNO suggests similar bonding in HPS despite the third row elemental substitutions
SETTLEMENT DEFINITION OF PHYSICAL-AND-MECHANICAL CHARACTERISTICS OF ROCK FOUNDATIONS OF THE SECTION № 28 OF THE CONCRETE DAM OF BOGUCHANSKAYA HPS
No full textIn accordance with the author method of calculation of the physical-and-mechanical characteristics of the foundations of concrete structures based on finite element models, computational studies of deformability and strength characteristics of rock foundation of section №28 of Boguchanskaya HPS concrete dam based on foundation subsidence field data (including its near-contact zones) were performe
Analisis Gaya Kepemimpinan Demokratis Pada Sub Bagian Hps Dan E-Katalog Bagian Sekretaris Perusahaan Pt. Perkebunan Nusantara V (Persero) Pekanbaru
No full textThe purpose of this working paper is to find out the Leadership Style used by the leader in the Sub-Section of Own Calculation Price and E-Catalog Section of the Corporate Secretary of PT. Perkebunan Nusantara V (Persero) in order to encourage the success of achieving the objectives in the Sub Section. Starting from the interest of the author to raise this title is because of the author's curiosity about what is done by the leader in the sub-section of HPS and ECatalog. As long as the writer practices field work, almost
no unwanted problems occur in the sub-section. The work atmosphere is quite peaceful, comfortable, and calm as if it
is a very missed thing for writers while practicing
field work. It was formed and built by a leader in it. Leaders in the HPS and E-Catalog sub-sections to build comfort for all members of their subordinates using the Democratic Leadership Style. Democratic leadership style is a leadership style that is effective and good for leaders in a company. By using the Democratic Leadership Style, Ms. Insyirah as the leader is able to achieve the goals set by the HPS and ECatalog sub-section and the company's objectives, these goals include creating sales growth and sustainable profits and increasing the company's assets to
provide added value to stakeholders
VQ-HPS: Human pose and shape estimation in a vector-quantized latent space
No full text© 2025 The Author(s), under exclusive license to Springer Nature SwitzerlandPrevious works on Human Pose and Shape Estimation (HPSE) from RGB images can be broadly categorized into two main groups: parametric and non-parametric approaches. Parametric techniques leverage a low-dimensional statistical body model for realistic results, whereas recent non-parametric methods achieve higher precision by directly regressing the 3D coordinates of the human body mesh. This work introduces a novel paradigm to address the HPSE problem, involving a low-dimensional discrete latent representation of the human mesh and framing HPSE as a classification task. Instead of predicting body model parameters or 3D vertex coordinates, we focus on predicting the proposed discrete latent representation, which can be decoded into a registered human mesh. This innovative paradigm offers two key advantages. Firstly, predicting a low-dimensional discrete representation confines our predictions to the space of anthropomorphic poses and shapes even when little training data is available. Secondly, by framing the problem as a classification task, we can harness the discriminative power inherent in neural networks. The proposed model, VQ-HPS, predicts the discrete latent representation of the mesh. The experimental results demonstrate that VQ-HPS outperforms the current state-of-the-art non-parametric approaches while yielding results as realistic as those produced by parametric methods when trained with little data. VQ-HPS also shows promising results when training on large-scale datasets, highlighting the significant potential of the classification approach for HPSE.This study is part of the EUR DIGISPORT project supported by the ANR within the framework of the PIA France 2030 (ANR-18-EURE-0022). This work was performed using HPC resources from the “Mésocentre” computing center of CentraleSupélec, École Normale Supérieure Paris-Saclay, and Université Paris-Saclay supported by CNRS and Région Île-de-France. This work has been partially supported by MIAI@Grenoble Alpes, (ANR-19-P3IA-0003).Peer ReviewedPostprint (author's final draft
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