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Faulty evidence for superconductivity in ac magnetic susceptibility of sulfur hydride under pressure

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National Science Review 2022年第6期9卷 43-44页

作者： J.E.hirsch Department of Physics University of California

Sulfur hydride was reported to become superconducting at high pressure and temperature [1]. Posteriorly, Huang and coworkers measured its ac magnetic susceptibility [2], reportedly confirming that finding. According to Semenok and Oganov [3], their work ‘sets a new standard for experimental studies of superconductivity at high pressure’.Instead I argue here that the ac susceptibility measurements of Huang et al.

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Simulating dispatchable grid services provided by flexible building loads:State of the art and needed building energy modeling improvements

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Building Simulation 2021年第3期14卷 441-462页

作者： Venkatesh Chinde Adam hirsch William Livingood Anthony R.Florita National Renewable Energy Laboratory 15013 Denver West ParkwayGoldenCO 80401USA School of Sustainability Interdisciplinary Center(IDC)HerzliyaP.0.Box 167Herzliya 46150Israel

End-use electrical loads in residential and commercial buildings are evolving into flexible and cost-effective resources to improve electric grid reliability,reduce costs,and support increased hosting of distributed renewable *** article reviews the simulation of utility services delivered by buildings for the purpose of electric grid operational *** consider services delivered to(1)the high-voitage bulk power system through the coordinated action of many,distributed building loads working together,and(2)targeted support provided to the operation of low-voltage electric distribution *** an exhaustive exploration is not possible,we emphasize the ancillary services and voltage management buildings can provide and summarize the gaps in our ability to simulate them with traditional building energy modeling(BEM)tools,suggesting pathways for future research and development.

关键词： building energy modeling grid-interactive efficient buildings demand response load flexibility thermostatically controlled loads reduced order models heating ventilation and air conditioning

Impact of crystalline and amorphous iron-and aluminum hydroxides on mechanisms of phosphate adsorption and desorption

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Journal of Environmental Sciences 2018年第8期30卷 175-189页

作者： Stella Gypser Florian hirsch Anja M.Schleicher Dirk Freese Brandenburg University of Technology Cottbus-Senftenberg Faculty of Environment Process Engineering Biotechnology and Chemistry Department of Soil Protection and Recultivation Brandenburg University of Technology Cottbus-Senftenberg Faculty of Environment Process Engineering Biotechnology and Chemistry Department of Geopedology and Landscape Development German Research Centre for Geosciences Section 3.1 Inorganic and Isotope Geochchemistry

Fourier-transform infrared（FT-IR） spectroscopic experiments were carried out during phosphate adsorption on highly crystalline gibbsite, poorly crystalline 2-line-ferrihydrite and amorphous iron–aluminum–hydroxide mixtures in the molar ratio 1：0, 10：1, 5：1, 1：1, 1：5, 1：10 and 0：1. The OH stretching vibrational bands were utilized to analyze changes in structural and surface OH groups during adsorption, because the position of characteristic P／O vibrational bands can shift depending on reaction conditions, pH or adsorbed phosphate *** and desorption kinetics were studied at pH6 and different initial phosphate concentrations to achieve varying phosphate coverage on the mineral surfaces. For gibbsite the formation of AlHPO4 and Al2HPO4 can be assumed, while for ferrihydrite, a FeHPO4 or Fe2PO4 complex and the precipitation of FePO4 with longer equilibration time were ***2HPO4 or a Fe2PO4 surface complex was deduced for Fe-hydroxides, an AlH2PO4 surface complex was identified for Al-hydroxide, and both displayed either hydrogen bonds to neighboring hydroxyl groups or hydrogen bonds to outer-sphere complexes. Fe：Al-hydroxide mixtures with high Al ratios showed a low phosphate desorption rate, while ferrihydrite and the Fe：Al-hydroxide mixtures with high Fe ratios had almost negligible desorption rates. It was concluded that within the weakly associated amorphous FeO（OH） materials, FePO4 precipitated, which was bound by outer-sphere hydrogen bonds. With high Al ratios, desorption increased, which indicated weaker phosphate binding of both inner-sphere and outer-sphere complexes and hence, either no or minor quantities of precipitate. Ferrihydrite showed a more rigid structure and a lower extent of precipitation compared to amorphous Fe-hydroxide.

关键词： Phosphate Adsorption Desorption Surface complexation Precipitation FT-IR

An Unusual Cause of Irritability in a Single Ventricle Patient after Bidirectional Glenn Shunt

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Congenital Heart Disease 2021年第4期16卷 393-396页

作者： Sarah Pradhan Eileen Broomall Russel hirsch The Heart Institute Cincinnati Children’s Hospital Medical CenterUniversity of Cincinnati College of MedicineCincinnatiOhioUSA Division of Neurology Cincinnati Children’s Hospital Medical CenterDepartment of PediatricsUniversity of Cincinnati College of MedicineCincinnatiOhioUSA

The differential diagnosis for irritability in children is *** patients with congenital heart disease,one must strongly consider cardiac etiologies such as low cardiac output or elevated central venous pressure(CVP).In patients with single-ventricle physiology,the second stage of palliation includes bidirectional Glenn,which involves anastomosis of the superior vena cava to the pulmonary artery resulting in volume offloading of the single systemic ***,early in the post-operative period,patients may experience a headache due to the acute increase in CVP,and symptoms improve over *** intracranial hypertension(IIH),also known as pseudotumor cerebri,is a rare neurologic disorder in children,characterized by raised intracranial pressure(ICP)in the absence of brain parenchymal lesions or cerebrospinal fluid(CSF)*** the pathogenesis of IIH is unknown,early recognition and treatment of IIH are important to prevent permanent vision *** are only rare reports of IIH in patients with Fontan *** our knowledge,we report the first case of IIH in a 2-year-old female after bidirectional Glenn.

关键词： Single ventricle bidirectional Glenn shunt idiopathic intracranial hypertension pseudotumor cerebri

Particle-size-dependent upconversion luminescence of NaYF4:Yb,Er nanoparticles in organic solvents and water at different excitation power densities

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Nano Research 2018年第12期11卷 6360-6374页

作者： Marco Kraft Christian Würth Verena Muhr Thomas hirsch Ute Resch-Genger Federal Institute for Matefiab Research and Testing (BAM) Division1.2BiophotonicsRichard-Willstaetter-Str.1112489BerlinGermany Institute of Analytical Chemistry Chemo-and BiosensorsUniversity of Regensburg93040RegensburgGermany

A systematic study of the luminescence properties of monodisperse β-NaYF4: 20% Yb3+, 2% Er3+ upconversion nanoparticles (UCNPs) with sizes ranging from 12-43 nm is presented utilizing steady-state and time-resolved fluorometry. Special emphasis was dedicated to the absolute quantification of size- and environment-induced quenching of upconversion luminescence (UCL) by high-energy O-H and C-H vibrations from solvent and ligand molecules at different excitation power densities (P). In this context, the still-debated population pathways of the 4F9/2 energy level of Er3+ were examined. Our results highlight the potential of particle size and P value for color tuning based on the pronounced near-infrared emission of 12 nm UCNPs, which outweighs the red Er3+ emission under “strongly quenched” conditions and accounts for over 50% of total UCL in water. Because current rate equation models do not include such emissions, the suitability of these models for accurately simulating all (de)population pathways of small UCNPs must be critically assessed. Furthermore, we postulate population pathways for the 4F9/2 energy level of Er3+, which correlate with the size-, environment-, and P-dependent quenching states of the higher Er3+ energy levels.

关键词： upconversion nanoparticle quenching diameter water cyclohexane

The Case of the Carnian(Triassic) Conodont Genus Metapolygnathus Hayashi

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Journal of Earth Science 2015年第2期26卷 219-223页

作者： Ali Murat Kili Pablo Plasencia Keisuke Ishida Francis hirsch Department of Geological Engineering Balikesir University Department of Geology and ICBIBE University of ValenciaDr. Moliner 50. 46100 Burjassot Spain Laboratory of Geology Faculty of Sciences Tokushima University Laboratory of Geology Faculty of Sciences Naruto University

Successive evolutionary trends control the genera Paragondolella Mosher and Meta- polygnathus Hayashi over the about 20 Ma long Aegean-Tuvalian timespan. In consideration of their evolutionary criteria, these genera have been retained together with Carnepigondolella Kozur and the two new genera proposed herein, MazzaeUa （type species M. carnica） and Hayashiella （type species H. nodosa）. Mazzaella n. gen. represents a Late Julian side branch ofMetapolygnathus, harbouring a platform ornamentation similar to the several million years younger Tuvalian lineage of Carnepigondolella, issued from Hayashiella n. gen. that is intermediary between Metapolygnathus and CarnepigondoleUa, based on appearance and platform ornamentation.

关键词： Carnian conodont phylogeny evolutionary trend.

Direct correlation of radiolarian Kilinora spiralis Zone with the Late Jurassic ammonite faunal succession in the Kurisaka Formation, Kurosegawa Terrane, SW Japan

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Science China Earth Sciences 2009年第12期52卷 1910-1923页

作者： ISHIDA Keisuke TSUJINO Yasuyuki KOZAI Takeshi SATO Tadashi hirsch Francis Laboratory of Geology Institute of SAS Faculty of Science University of Tokushima Tokushima 770-8502 Japan Tokushima Prefectural Museum Bunka-no-Mori Park Tokushima 770-8070 Japan Laboratory of Geosciences Naruto University of Education Naruto 772-8502 Japan Fukada Geological Institute Hon-Komagome 2-13-12 Bunkyo-Ku Tokyo 113-0021 Japan

The last appearance datum of the radiolarian Kilinora spiralis is recorded above the first appearance datum of the ammonite Ataxioceras (A.) kurisakense in the Todoro Section of the Kurisaka Formation, Southern Kurosegawa Terrane, Shikoku, SW Japan. The constraint by ammonite age prolongs the range of the Kilinora spiralis Zone, a remarkable Jurassic radiolarian zone in Japan-NW Pacific region, into the lower Kimmeridgian. The direct correlation of the Kilinora spiralis zone with the Late Jurassic ammonite faunal succession in the Kurisaka Formation will provide a clue to the still pending chronological difference between European and North American radiolarian zones.

关键词： Late Jurassic LAD of Kilinora spiralis radiolarian zonation FAD of Ataxioceras (A.) kurisakense Kurisaka Formation Kurosegawa Terrane SW Japan

Recent development in aluminium for automotive applications

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Transactions of Nonferrous Metals Society of China 2014年第7期24卷 1995-2002页

作者： Jürgen hirsch Hydro Aluminium Rolled Products GmbH

Aspects of material selection and innovative concepts of car construction using aluminium as best suited light-weight materials were presented, and recent development in established and advanced use of aluminium in passenger cars was discussed that help to meet economic and environmental requirements. 5xxx and 6xxx aluminium alloys were presented that have been improved for the increasing demands regarding higher strength and better formability, resulting in a mass reduction and improved crashworthiness. Furthermore, advances concerning multi-material light weight design were presented by examples for aluminium solutions in advanced “Multi-material” Super-Light-Car （SLC） concepts, which reaches significant mass reductions.

关键词： automobile body-in-white light weight design super-light-car

Evaluating and Mapping Grape Color Using Image-Based Phenotyping

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Plant Phenomics 2020年第1期2卷 95-105页

作者： A.N.Underhill C.D.hirsch M.D.Clark Department of Horticultural Science University of MinnesotaSt.PaulMNUSA Department of Plant Pathology University of MinnesotaSt.PaulMNUSA

Grape berry color is an economically important trait that is controlled by two major genes influencing anthocyanin synthesis in the *** is often described qualitatively using six major categories;however,this is a subjective rating that often fails to describe variation within these six *** investigate minor genes influencing berry color,image analysis was used to quantify berry color using different color *** image analysis pipeline was developed and utilized to quantify color in a segregating hybrid wine grape population across two *** were collected from grape clusters immediately after harvest and segmented by color to determine the red,green,and blue(RGB);hue,saturation,and intensity(HSI);and lightness,red-green,and blue-yellow values(L∗a∗b∗)of *** analysis identified known major QTL for color on chromosome 2 along with several previously unreported smaller-effect QTL on chromosomes 1,5,6,7,10,15,18,and *** study demonstrated the ability of an image analysis phenotyping system to characterize berry color and to more effectively capture variability within a population and identify genetic regions of interest.

关键词： Image image Mapping