cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Deep Deterministic Policy Gradient for End-to-End Communication Systems without Prior Channel Knowledge
Creators: name: Zhang, Bolun
name: Van Huynh, Nguyen
Publisher: name: arXiv
Year: 2023
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: End-to-End (E2E) learning-based concept has been recently introduced to jointly optimize both the transmitter and the receiver in wireless communication systems. Unfortunately, this E2E learning architecture requires a prior differentiable channel model to jointly train the deep neural networks (DNNs) at the transceivers, which is hardly obtained in practice. This paper aims to solve this issue by developing a deep deterministic policy gradient (DDPG)-based framework. In particular, the proposed solution uses the loss value of the receiver DNN as the reward to train the transmitter DNN. The simulation results then show that our proposed solution can jointly train the transmitter and the receiver without requiring the prior channel model. In addition, we demonstrate that the proposed DDPG-based solution can achieve better detection performance compared to the state-of-the-art solutions.
description: submitted to IEEE GLOBECOM 2023
Sense of control and depression during public health restrictions and the COVID-19 pandemic
Creators: name: MSETFI, RACHEL
name: Kornbrot, Diana
name: Halbrook, Yemaya J.
name: Senan, Salha
Publisher: name: University of Limerick
Year: 2023
Subjects: subject: Psychology
subject: FOS: Psychology

description: Depression rates have increased significantly since the onset of the COVID-19 pandemic,with a number of factors implicated in this increase, including stress, fear, social isolation and thepsychological impact of public health restrictions. The main purpose of the current cross-sectional survey study was to examine the relationship between the experience of public health restrictions, the sense of control and depression, both during and after restrictions were lifted. A survey methodology was chosen, with data collected in the Republic of Ireland at two time points (January 2022 and May 2022). Time 1 participants (n = 314) were invited to repeat the measures 5 months later, with 172 agreeing to be recontacted, and 47 participants completing all measures at two time points. Findings showed that both the sense of control, in relation to perceived constraints, w = 0.43, and the experience of restrictions, w = 0.14, predicted depression at Time 1. Participants were less likely to be depressed at Time 2 and had a stronger sense of control. The Time 1 sense of control through perceived constraints predicted depression at Time 2, w = 0.45. Overall, these data show that public health restrictions and the sense of control are linked and that the sense of control has a powerful and long-lasting effect on depression status in restricted conditions, even once these have been lifted.
Higgs production in bottom quark annihilation: Transverse momentum distribution at NNLO+NNLL
Creators: name: Harlander, Robert V.
name: Tripathi, Anurag
name: Wiesemann, Marius
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present the inclusive transverse momentum distribution for Higgs bosons produced in bottom quark annihilation at the LHC. The results are obtained in the five-flavor scheme. The soft and collinear terms at small $p_T$ are resummed through NNLL accuracy and matched to the NNLO transverse momentum distribution at large $p_T$. We find that the theoretical uncertainty, derived from a variation of the unphysical scales entering the calculation, is significantly reduced with respect to lower orders.
description: 35 pages, 22 figures
Decline of erythropoietin formation at continuous hypoxia is not due to feedback inhibition
Creators: name: Eckardt, K. U.
name: Dittmer, J.
name: Neumann, R.
name: Bauer, C.
name: Kurtz, Armin
Publisher: name: Universität Regensburg
Year: 1990
Subjects: subject: 570 Biowissenschaften, Biologie
subject: 610 Medizin
subject: Animals
subject: Anoxia/metabolism
subject: Biomechanics
subject: Erythropoietin/genetics
subject: Feedback
subject: Kidney/metabolism
subject: Kinetics
subject: Male
subject: RNA, Messenger/metabolism
subject: Rats
subject: Rats, Inbred Strains

description: Serum erythropoietin (EPO) levels in response to hypoxia are known to decline before an increase in blood oxygen carrying capacity. To define the possible mechanisms underlying this phenomenon, we have investigated 1) how renal EPO mRNA content and EPO production rate underlying the early kinetics of serum EPO levels change under different degrees of normobaric hypoxia, and 2) if a feedback inhibition of either EPO formation or EPO survival in the circulation exists by the hormone itself. We found that serum immunoreactive EPO levels in rats peaked after 12-h exposure to 7.5 or 9% oxygen (2,949 +/- 600 and 756 +/- 108 mU/ml, respectively, mean +/- SE) and declined to 29 and 64% of peak levels, respectively, after 36 h of hypoxia. EPO levels in response to 11.5% oxygen showed no consistent change between 12 (122 +/- 21 mU/ml, mean +/- SE) and 36 h (182 +/- 35 mU/ml) of hypoxia. The decline in EPO levels under severe hypoxia (7.5% O2) was paralleled by a marked reduction in renal EPO mRNA content, indicating that it was primarily a result of diminished hormone production. The observed reductions in serum EPO after 36 h corresponded to preceding declines of calculated EPO production rates from 163- to 62-fold (7.5% O2) and 36- to 25-fold (9% O2) basal values. Application of 50 IU recombinant human EPO to rats 12 h, 6 h, or immediately before hypoxic exposure to mimic the early increase in EPO levels did not affect endogenous EPO formation during a subsequent hypoxic exposure of 12 h.(ABSTRACT TRUNCATED AT 250 WORDS)
Multiple site estimates of erythropoietin and renin in polycythemic kidney transplant patients
Creators: name: Aeberhard, J. M.
name: Schneider, P. A.
name: Vallotton, M. B.
name: Kurtz, Armin
name: Leski, M.
Publisher: name: Universität Regensburg
Year: 1990
Subjects: subject: 570 Biowissenschaften, Biologie
subject: 610 Medizin
subject: Adult
subject: Erythropoietin/blood
subject: Humans
subject: Kidney/metabolism
subject: Kidney Transplantation/adverse effects
subject: Male
subject: Middle Aged
subject: Oxygen Consumption
subject: Polycythemia/etiology
subject: Radioimmunoassay
subject: Renin/blood

description: The development of polycythemia after renal transplantation is a well known phenomenon and its etiology remains controversial. In particular, it is unknown whether inappropriate erythropoietin (EPO) production could be a reason. Utilizing a sensitive radioimmunoassay for EPO we have measured EPO concentrations in venous blood from native and grafted kidneys in three normocythemic and seven polycythemic patients. We found that (1) in our posttransplantation polycythemic patients there are inappropriately high systemic EPO levels, hence that posttransplantation polycythemia is related to EPO overproduction. (2) This high EPO production comes from the native kidneys. (3) There is a correlation between EPO and renin levels in the peripheral as well as in native and transplanted kidneys' venous samples.
Serum erythropoietin and erythropoiesis in primary and secondary hyperparathyroidism: effect of parathyroidectomy
Creators: name: Ureña, P.
name: Eckardt, Kai-Uwe
name: Sarfati, E.
name: Zingraff, J.
name: Zins, B.
name: Roullet, J. B.
name: Roland, E.
name: Drüeke, T.
name: Kurtz, Armin
Publisher: name: Universität Regensburg
Year: 1991
Subjects: subject: 570 Biowissenschaften, Biologie
subject: 610 Medizin
subject: Calcitriol/therapeutic use
subject: Erythropoiesis
subject: Erythropoietin/blood
subject: Female
subject: Humans
subject: Hyperparathyroidism/surgery
subject: Hyperparathyroidism, Secondary/surgery
subject: Male
subject: Middle Aged
subject: Parathyroid Hormone/blood
subject: Parathyroidectomy

description: Primary as well as secondary hyperparathyroidism may be associated with anemia, and parathyroidectomy (PTx) may improve or even heal it. The precise link between the two conditions is still matter of discussion. The purpose of the present study was to investigate possible effects of PTx on serum immunoreactive erythropoietin (iEPO) in secondary (group I, n = 23), and primary (group II, n = 16) hyperparathyroidism patients, and in 3 patients undergoing cervicotomy for thyroid mass removal (group III). In group I patients, circulating iEPO levels rose from 23.1 +/- 4.8 mU/ml before PTx to 28.2 +/- 5.0 and 245 +/- 125 mU/ml (mean +/- SEM) at day 7 (p = NS) and 14 after PTx (p less than 0.003), respectively. Reticulocyte count increased 2 weeks after PTx: from 61,000 +/- 13,317 to 86,533 +/- 13,462/mm3 (p less than 0.05, n = 23). In 4 of these patients serum iEPO levels could be measured again 12-24 months after PTx. They were slightly higher than those determined before PTx: 37.0 +/- 8.4 versus 31.8 +/- 13.5 mU/ml. Their hematocrits were also higher than before PTx: 12.8 +/- 0.9 versus 11.0 +/- 0.9 g/dl. In group II patients, serum iEPO levels remained unchanged after PTx: 17.5 +/- 2.0 mU/ml before PTx and 20.0 +/- 3.0 mU/ml 14 days PTx. The reticulocyte count, however, increased significantly 2 weeks after PTx: from 25,103 +/- 3,000 to 40,827 +/- 4,080/mm3 (p less than 0.01). In group III patients, serum iEPO, reticulocyte count, and hemoglobin remained stable after surgery. Since all group I patients had received vitamin D supplementation after PTx, we studied an additional group of 14 chronic dialysis patients (group IV) who received either calcitriol (1 micrograms/day, n = 7) or placebo (n = 7) during 14 days. The patients on calcitriol treatment, but not those on placebo, had a significant decrease of serum iEPO: 18.6 +/- 4.9 versus 16.0 +/- 4.2 mU/ml (p less than 0.03). In conclusion, PTx led to a striking increase of serum iEPO and blood reticulocytes in uremic patients with secondary hyperparathyroidism, and an increase of reticulocyte count, but not of iEPO, in patients with primary hyperparathyroidism. Marked changes of circulating PTH, extra-or intracellular calcium and phosphorus concentrations as well as of tissue sensitivity to EPO after PTx could all be responsible. In contrast, the surgical procedure and the therapeutic increase in plasma calcitriol do not appear to be involved.
Supplemental data: Chapter 4: Phenotyping Arabidopsis lines ectopically expressing distinct PLC genes identifies 'compactness' as novel architectural shoot strategy to cope with water deprivation
Creators: name: Van Hooren, Max
name: Van Wijk, Ringo
name: Vaseva, Irina
name: Van Der Straeten, Dominique
name: Haring, Michel
name: Munnik, Teun
Publisher: name: Zenodo
Year: 2022

description: Supplemental data: table with significance for each comparrison made in the chapter.
 Also attached are the figures of all traits, for each insertion line seperatly
Oxygen-dependent erythropoietin production by the isolated perfused rat kidney
Creators: name: Scholz, Holger
name: Schurek, H. J.
name: Eckardt, Kai-Uwe
name: Kurtz, Armin
name: Bauer, Christian
Publisher: name: Universität Regensburg
Year: 1991
Subjects: subject: 570 Biowissenschaften, Biologie
subject: 610 Medizin
subject: Animals
subject: Calmodulin/antagonists & inhibitors
subject: Cyclic GMP/pharmacology
subject: Erythropoietin/biosynthesis
subject: Forskolin/pharmacology
subject: Imidazoles/pharmacology
subject: Kidney/metabolism
subject: Kinetics
subject: Male
subject: Oxygen/pharmacology
subject: Rats
subject: Second Messenger Systems
subject: Sulfonamides/pharmacology
subject: Vascular Resistance/drug effects

description: In this study we have investigated the role of oxygen delivery and of classic second messengers on erythropoietin production by the isolated perfused rat kidney. We found that the rat kidney was capable of de novo synthesis of erythropoietin. The erythropoietin production rate was inversely related to the oxygen pressure in the perfusate and increased from 0.17 to 1.85 U erythropoietin h-1 g kidney-1 when arterial PO2 was lowered from 500 mmHg to 30 mmHg. Addition of forskolin (10 microM) and 8-bromo-cGMP (100 microM) to the perfusate elicited significant effects on the renal vascular resistance, but had no significant effect on erythropoietin production. Hypoxia-induced erythropoietin formation, however, was blocked by calmidazolium (1 microM) and W-7 (10 microM), two structurally different putative calmodulin antagonists. Calmidazolium and W-7 had no effect on other functional parameters of the isolated perfused rat kidney such as flow rate, glomerular filtration rate or sodium reabsorption. Our findings suggest that the oxygen-sensing mechanism that controls renal erythropoietin production is primarily located in the kidney itself. A calcium/calmodulin-dependent cellular reaction could be involved in the signal transduction process.
RGB-D And Thermal Sensor Fusion: A Systematic Literature Review
Creators: name: Brenner, Martin
name: Reyes, Napoleon H.
name: Susnjak, Teo
name: Barczak, Andre L. C.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In the last decade, the computer vision field has seen significant progress in multimodal data fusion and learning, where multiple sensors, including depth, infrared, and visual, are used to capture the environment across diverse spectral ranges. Despite these advancements, there has been no systematic and comprehensive evaluation of fusing RGB-D and thermal modalities to date. While autonomous driving using LiDAR, radar, RGB, and other sensors has garnered substantial research interest, along with the fusion of RGB and depth modalities, the integration of thermal cameras and, specifically, the fusion of RGB-D and thermal data, has received comparatively less attention. This might be partly due to the limited number of publicly available datasets for such applications. This paper provides a comprehensive review of both, state-of-the-art and traditional methods used in fusing RGB-D and thermal camera data for various applications, such as site inspection, human tracking, fault detection, and others. The reviewed literature has been categorised into technical areas, such as 3D reconstruction, segmentation, object detection, available datasets, and other related topics. Following a brief introduction and an overview of the methodology, the study delves into calibration and registration techniques, then examines thermal visualisation and 3D reconstruction, before discussing the application of classic feature-based techniques as well as modern deep learning approaches. The paper concludes with a discourse on current limitations and potential future research directions. It is hoped that this survey will serve as a valuable reference for researchers looking to familiarise themselves with the latest advancements and contribute to the RGB-DT research field.
description: 34 pages, 21 figures
Limits on light WIMPs from the CDEX-1 experiment with a p-type point-contact germanium detector at the China Jingping Underground Laboratory
Creators: name: Yue, Q.
name: Zhao, W.
name: Kang, K. J.
name: Cheng, J. P.
name: Li, Y. J.
name: Lin, S. T.
name: Chang, J. P.
name: Chen, N.
name: Chen, Q. H.
name: Chen, Y. H.
name: Chuang, Y. C.
name: Deng, Z.
name: Du, Q.
name: Gong, H.
name: Hao, X. Q.
name: He, H. J.
name: He, Q. J.
name: Huang, H. X.
name: Huang, T. R.
name: Jiang, H.
name: Li, H. B.
name: Li, J. M.
name: Li, J.
name: Li, J.
name: Li, X.
name: Li, X. Y.
name: Li, Y. L.
name: Liao, H. Y.
name: Lin, F. K.
name: Liu, S. K.
name: Lv, L. C.
name: Ma, H.
name: Mao, S. J.
name: Qin, J. Q.
name: Ren, J.
name: Ren, J.
name: Ruan, X. C.
name: Shen, M. B.
name: Singh, L.
name: Singh, M. K.
name: Soma, A. K.
name: Su, J.
name: Tang, C. J.
name: Tseng, C. H.
name: Wang, J. M.
name: Wang, L.
name: Wang, Q.
name: Wong, H. T.
name: Wu, S. Y.
name: Wu, Y. C.
name: Wu, Y. C.
name: Xianyu, Z. Z.
name: Xiao, R. Q.
name: Xing, H. Y.
name: Xu, F. Z.
name: Xu, Y.
name: Xu, X. J.
name: Xue, T.
name: Yang, L. T.
name: Yang, S. W.
name: Yi, N.
name: Yu, C. X.
name: Yu, H.
name: Yu, X. Z.
name: Zeng, X. H.
name: Zeng, Z.
name: Zhang, L.
name: Zhang, Y. H.
name: Zhao, M. G.
name: Zhou, Z. Y.
name: Zhu, J. J.
name: Zhu, W. B.
name: Zhu, X. Z.
name: Zhu, Z. H.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We report results of a search for light Dark Matter WIMPs with CDEX-1 experiment at the China Jinping Underground Laboratory, based on 53.9 kg-days of data from a p-type point-contact germanium detector enclosed by a NaI(Tl) crystal scintillator as anti-Compton detector. The event rate and spectrum above the analysis threshold of 475 eVee are consistent with the understood background model. Part of the allowed regions for WIMP-nucleus coherent elastic scattering at WIMP mass of 6-20 GeV are probed and excluded. Independent of interaction channels, this result contradicts the interpretation that the anomalous excesses of the CoGeNT experiment are induced by Dark Matter, since identical detector techniques are used in both experiments.
description: 5 pages, 5 figures
Graphologue: Exploring Large Language Model Responses with Interactive Diagrams
Creators: name: Jiang, Peiling
name: Rayan, Jude
name: Dow, Steven P.
name: Xia, Haijun
Publisher: name: arXiv
Year: 2023
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Large language models (LLMs) have recently soared in popularity due to their ease of access and the unprecedented ability to synthesize text responses to diverse user questions. However, LLMs like ChatGPT present significant limitations in supporting complex information tasks due to the insufficient affordances of the text-based medium and linear conversational structure. Through a formative study with ten participants, we found that LLM interfaces often present long-winded responses, making it difficult for people to quickly comprehend and interact flexibly with various pieces of information, particularly during more complex tasks. We present Graphologue, an interactive system that converts text-based responses from LLMs into graphical diagrams to facilitate information-seeking and question-answering tasks. Graphologue employs novel prompting strategies and interface designs to extract entities and relationships from LLM responses and constructs node-link diagrams in real-time. Further, users can interact with the diagrams to flexibly adjust the graphical presentation and to submit context-specific prompts to obtain more information. Utilizing diagrams, Graphologue enables graphical, non-linear dialogues between humans and LLMs, facilitating information exploration, organization, and comprehension.
Amiloride enhances the secretion but not the synthesis of renin in renal juxtaglomerular cells
Creators: name: Kurtz, Armin
name: Della Bruna, R.
name: Scholz, Holger
name: Baier, Wolfgang
Publisher: name: Universität Regensburg
Year: 1991
Subjects: subject: 570 Biowissenschaften, Biologie
subject: 610 Medizin
subject: Amiloride/pharmacology
subject: Animals
subject: Carrier Proteins/antagonists & inhibitors
subject: Cells, Cultured
subject: Juxtaglomerular Apparatus/metabolism
subject: Renin/secretion
subject: Saralasin/pharmacology
subject: Sodium-Hydrogen Antiporter

description: In this study we have examined a potential role of the sodium/proton exchange system in the regulation of renin secretion. We found that the inhibitors of the Na+/H+ antiport, amiloride (1 mM) and ethylisopropylamiloride (EIPA, 50 microM), led to a 125% increase of renin secretion from cultured mouse juxtaglomerular cells. The stimulatory effect of EIPA on renin secretion was dependent on the extracellular concentrations of sodium and hydrogen ions. While lowering the extracellular pH from 7.3 to 7.0, and lowering [Na+]e from 130 mM to 5 mM had no effect on basal renin release, it markedly attenuated or even blunted the effect of EIPA on renin secretion. The stimulatory effect of forskolin on renin secretion, however, was not altered by decreases of extracellular pH and of sodium. Inhibition of basal renin release was achieved with angiotensin II (1 microM). In the presence of EIPA the inhibitory effect angiotensin II was markedly attenuated. Although effective on renin secretion, neither amiloride nor EIPA exerted a significant effect on the denovo synthesis of renin in cultured mouse JG cells. These findings are compatible with the idea that an amiloride-sensitive transport process, presumably the Na+/H+ exchanger, acts indirectly as an inhibitory signal transduction system for renin secretion from renal juxtaglomerular cells.
Role of excretory graft function for erythropoietin formation after renal transplantation
Creators: name: Eckardt, Kai-Uwe
name: Frei, U.
name: Kliem, V.
name: Bauer, Christian
name: Koch, K. M.
name: Kurtz, Armin
Publisher: name: Universität Regensburg
Year: 1990
Subjects: subject: 570 Biowissenschaften, Biologie
subject: 610 Medizin
subject: Adolescent
subject: Adult
subject: Anemia/etiology
subject: Creatinine/blood
subject: Erythropoietin/blood
subject: Female
subject: Hemoglobins/metabolism
subject: Humans
subject: Kidney Failure, Chronic/surgery
subject: Kidney Transplantation/physiology
subject: Kinetics
subject: Male
subject: Middle Aged
subject: Time Factors

description: To examine the role of renal excretory function for erythropoietin (EPO) formation we have determined the kinetics of plasma immunoreactive EPO (irEPO) in patients with end-stage renal disease undergoing renal allotransplantation (RTX). In 13 patients with immediate excretory graft function (imGF) and stable haemoglobin (Hb) concentrations (median Hb 9.5 g dl-1 and median irEPO 18 mU ml-1 before RTX) irEPO increased significantly on day 4 after RTX to a median value of 29 mU ml-1 and 2 days later reached a plateau of 34.4 +/- 3.3 mU ml-1 (mean +/- SD of daily median values during days 6-20). In patients with imGF having acute blood loss and subsequently receiving transfusions, irEPO responded in an inverse fashion to changes in Hb concentrations. In 12 patients with delayed graft function (dGF) (median Hb 8.8 g dl-1 and median irEPO 15 mU ml-1 before RTX) irEPO levels during the period of excretory failure remained either unchanged or displayed marked variations with peak values greatly exceeding those of patients with imGF. These variations were not related to changes in Hb concentrations and irEPO levels did not change following alterations in Hb concentrations. Upon recovery of excretory function irEPO approached the values found in patients with imGF. The results suggest that an intact excretory renal function is not a prerequisite for the capability to produce EPO, but correlates with the oxygen-dependent regulation of EPO formation.
Quantumness of correlations, quantumness of ensembles and quantum data hiding
Creators: name: Piani, Marco
name: Narasimhachar, Varun
name: Calsamiglia, John
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the quantumness of correlations for ensembles of bi- and multi-partite systems and relate it to the task of quantum data hiding. Quantumness is here intended in the sense of minimum average disturbance under local measurements. We consider a very general framework, but focus on local complete von Neumann measurements as cause of the disturbance, and, later on, on the trace-distance as quantifier of the disturbance. We discuss connections with entanglement and previously defined notions of quantumness of correlations. We prove that a large class of quantifiers of the quantumness of correlations are entanglement monotones for pure bipartite states. In particular, we define an entanglement of disturbance for pure states, for which we give an analytical expression. Such a measure coincides with negativity and concurrence for the case of two qubits. We compute general bounds on disturbance for both single states and ensembles, and consider several examples, including the uniform Haar ensemble of pure states, and pairs of qubit states. Finally, we show that the notion of ensemble quantumness of correlations is most relevant in quantum data hiding. Indeed, while it is known that entanglement is not necessary for a good quantum data hiding scheme, we prove that ensemble quantumness of correlations is.
description: 35 pages, 2 figures, close to published version
A proper total coloring distinguishing adjacent vertices by sums of some product graphs
Creators: name: Choi, Hana
name: Kim, Dongseok
name: Lee, Sungjin
name: Lee, Yeonhee
Publisher: name: arXiv
Year: 2014
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: In this article, we consider a proper total coloring distinguishes adjacent vertices by sums, if every two adjacent vertices have different total sum of colors of the edges incident to the vertex and the color of the vertex. Pilsniak and Wozniak \cite{PW} first introduced this coloring and made a conjecture that the minimal number of colors need to have a proper total coloring distinguishes adjacent vertices by sums is less than or equal to the maximum degree plus $3$. We study proper total colorings distinguishing adjacent vertices by sums of some graphs and their products. We find that these graphs satisfy the conjecture.
description: 17 apges, 12 figures
Перспективы использования турбогенераторов в режиме синхронных компенсаторов для энергосистемы Украины
Creators: name: Владимировна, Шевченко Валентина
name: Кирисов Игорь Геннадиевич
Publisher: name: Zenodo
Year: 2012
Subjects: турбогенераторы
ТГ
синхронные компенсаторы
энергосистема

description: [Шевченко В.В., Кирисов И.Г. Перспективы использования турбогенераторов в режиме синхронных компенсаторов для энергосистемы Украины // Материалы работы Международного симпозиума "Проблемы усовершенствования электрических машин и аппаратов. Теория и практика" (SIEMA’2012), 24-26.10.2012. - Украина, Харьков: НТУ "ХПИ", 2012. - Стендовый доклад №128. https://doi.org/10.5281/zenodo.2541696]

Обсуждаются технико-экономические аспекты использования турбогенераторов в режиме синхронных компенсаторов.

Ключевые слова: турбогенераторы, ТГ, синхронные компенсаторы, энергосистема.

Репозиторий НТУ "ХПИ" - открыть pdf
Distinct hemodynamic and gastric effects of human CGRP I and II in man
Creators: name: Beglinger, C.
name: Born, W.
name: Münch, R.
name: Kurtz, Armin
name: Gutzwiller, J. P.
name: Jäger, K.
name: Fischer, J. A.
Publisher: name: Universität Regensburg
Year: 1991
Subjects: subject: 570 Biowissenschaften, Biologie
subject: 610 Medizin
subject: Adult
subject: Aldosterone/blood
subject: Blood Flow Velocity/drug effects
subject: Calcitonin Gene-Related Peptide/pharmacology
subject: Carotid Arteries
subject: Gastric Acid/secretion
subject: Gastric Mucosa/secretion
subject: Hemodynamics/drug effects
subject: Humans
subject: Male
subject: Renin/blood
subject: Skin/blood supply

description: The human calcitonin gene-related peptides I and II (or alpha and beta) (CGRP I and II) are encoded by two different genes, but they have 34 of the 37 amino acid residues in common. Human CGRP I more potently stimulated blood flow through the skin and carotid artery (p less than 0.01), and the heart rate (p less than 0.05), and plasma renin activity and aldosterone secretion than human CGRP II (p less than 0.02). Inhibition of pentagastrin-stimulated gastric acid output, on the other hand, was only obtained with CGRP II. The separate effects of human CGRP I and II on the cardiovascular and gastric systems are presumably mediated by different receptors or receptor pathways recognized by the two closely related neuropeptides.
In-vitro activity of fleroxacin against isolates causing complicated urinary tract infections and concentrations in seminal and prostatic fluid and in prostatic adenoma tissue
Creators: name: Naber, K. G.
name: Sörgel, F.
name: Kees, Frieder K.
name: Schumacher, H.
name: Metz, R.
name: Grobecker, H.
Publisher: name: Universität Regensburg
Year: 1988
Subjects: subject: 615 Pharmazie
subject: Adult
subject: Aged
subject: Aged, 80 and over
subject: Anti-Infective Agents/therapeutic use
subject: Body Fluids/metabolism
subject: Ciprofloxacin/therapeutic use
subject: Fleroxacin
subject: Gram-Negative Bacteria/drug effects
subject: Gram-Positive Bacteria/drug effects
subject: Humans
subject: Male
subject: Microbial Sensitivity Tests
subject: Middle Aged
subject: Prostatic Hyperplasia/metabolism
subject: Seminal Vesicles/metabolism
subject: Urinary Tract Infections/microbiology

description: Fleroxacin is a new fluoroquinolone with a broad antibacterial spectrum and a serum half-life of about 8-12 h. Eighty percent of 400 isolates from complicated or hospital-acquired urinary tract infections were inhibited by a concentration of 1 mg/l and 95% by 4 mg/l. As with other quinolones, fleroxacin is less active in acid urine (pH 5.4) than in Mueller-Hinton broth (pH 7.4). In 12 healthy volunteers the concentrations of fleroxacin were measured in plasma and seminal and prostatic fluid 2, 4 and 12 h after an oral dose of 400 mg. The mean plasma concentrations of three or four volunteers at each time were 4.2, 3.6 and 1.2 mg/l, respectively. The corresponding prostatic fluid/plasma ratios were 0.30, 0.27 and 1.96, respectively. By concomittant administration of ioxitalamic acid it could be demonstrated that in samples obtained 12 h after administration urinary contamination must be considered. Fleroxacin is concentrated in seminal fluid by a median ratio of 1.7. In 13 elderly patients the prostatic fluid and prostatic adenoma tissue concentrations were determined one to four hours following oral administration of 400 mg. The concentrations in prostatic fluid were similar to those of volunteers. The tissue concentrations exceeded plasma concentrations by only about 10% (median). Fleroxacin is very active against isolates causing complicated UTI. Concentrations in seminal and prostatic fluid and prostatic adenoma tissue are sufficiently high to treat bacterial prostatitis or vesiculitis caused by susceptible bacterial strains.
Insulin-like growth factor I: a modulator of erythropoiesis in uraemic patients?
Creators: name: Ureña, P.
name: Bonnardeaux, A.
name: Eckardt, Kai-Uwe
name: Kurtz, Armin
name: Drüeke, T. B.
Publisher: name: Universität Regensburg
Year: 1992
Subjects: subject: 570 Biowissenschaften, Biologie
subject: 610 Medizin
subject: Adult
subject: Anemia/etiology
subject: Erythropoiesis/physiology
subject: Female
subject: Hematocrit
subject: Humans
subject: Hyperparathyroidism, Secondary/etiology
subject: Insulin-Like Growth Factor I/physiology
subject: Male
subject: Middle Aged
subject: Uremia/physiopathology

description: Anaemia is a feature almost invariably complicating chronic renal failure. Its pathophysiology is multifactorial but the most important cause is erythropoietin (Epo) deficiency. However, either no relation or even a weakly positive relation generally exists between serum immunoreactive (i) Epo and haematocrit values in uraemic anaemia, whereas in anaemias of non-renal origin the correlation is most often strongly negative. Recent evidence indicates that growth hormone also stimulates erythropoiesis. Moreover, late erythroid progenitor cells (CFU-E) require insulin and/or insulin-like growth factor I (IGF-I) for development in vitro. IGF-I has been shown to have a synergistic action with Epo. We have measured serum iEpo and IGF-I levels in 17 haemodialysis patients with severe hyperparathyroidism (mean +/- SEM serum iPTH, 988 +/- 88 pg/ml). Mean age and duration of dialysis treatment were 46.1 +/- 3.4 and 8.8 +/- 1.0 years respectively. Mean haematocrit and haemoglobin values wer 28.1 +/- 1.7% and 9.39 +/- 0.54 g/dl respectively. Mean serum iEpo and IGF-I levels were 20.3 +/- 4.7 mU/ml and 320 +/- 20 ng/ml respectively (normal values for serum iEpo and IGF-I, 17.9 +/- 6 mU/ml and 91 +/- 23 ng/ml respectively). We found that serum IGF-I concentrations were well correlated with haematocrit values (r = 0.68, n = 15, P less than 0.004) whereas serum iEpo values were not (r = 0.41, n = 12, P = 0.18). IGF-I could therefore be an important factor regulating erythropoiesis in uraemic patients, at least when associated with severe hyperparathyroidism.
Exchange fluctuation theorems for a chain of interacting particles in presence of two heat baths
Creators: name: Lahiri, Sourabh
name: Jayannavar, A. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The exchange fluctuation theorem for heat exchanged between two systems at different temperatures, when kept in direct contact, has been investigated by C. Jarzynski and D. K. Wójcik, in Phys. Rev. Lett. {\bf 92}, 230602 (2004). We extend this result to the case where two Langevin reservoirs at different temperatures are connected via a conductor made of interacting particles, and are subjected to an external drive or work source. The Langevin reservoirs are characterized by Gaussian white noise fluctuations and concomitant friction coefficients. We first derive the Crooks theorem for the ratio between forward and reverse paths, and discuss the first law in this model. Then we derive the modified detailed fluctuation theorems (MDFT) for the heat exchanged at each end. These theorems differ from the usual form of the detailed fluctuation theorems (DFT) in literature, due the presence of an extra multiplicative factor. This factor quantifies the deviation of our MFDT from the DFT. Finally, we numerically study our model, with only two interacting particles for simplicity.
description: 7 pages, 5 figures
A New Checksum Formula for Error Detecting Decimal Codes
Creators: name: Alper, Mert Bora
Publisher: name: Zenodo
Year: 2017
Subjects: Checksum
Checkdigit
Error Detection

description: Abstract

Decimal codes are used everywhere in modern societies to identify things such as credit cards, books, and even human beings through passport numbers. All these integers are subject to various transmission errors, due to machine, and mostly human errors. Hence various error detection algorithms have been developed to mitigate the issue, even if not completely solve it through error correction.

This essay addresses the problem of detecting transmission errors in decimal codes using a single decimal checksum digit. The aim is to develop a new algorithm that can detect most of the transmission errors while being flexible at the same time so that it can be adapted to different situations. The scope of the transmission errors are limited to the 6 most common transmission errors, which constitutes 91.4% of all transmission errors, according to the Kirtland's investigation. For the scope of this paper, the new error detection algorithm is expected to deal with situations where only one transmission error occurs at a time.

In the development of The New Algorithm, a mathematical model of the problem domain is created using arrays, and afterwards, the conditions which the modelling arrays must satisfy for detecting errors are identified under the concept of The Ideal Algorithm. Afterwards, each of the modelling conditions is assigned a score depending on how "detrimental" their violation will be (which is based on the frequency of the error the condition is interested in), which in turn allowed computer assisted brute-force method to be used to find the most suitable arrays for The New Algorithm.

The New Algorithm can detect 91.05% of all transmission errors and yet, thanks to the mathematical modelling, it can be adapted to different situations in future and different local contexts.
description: {"references": ["H. Michael Damm. Totally anti-symmetric quasigroups for all orders n \u2260 2,6. Discrete Mathematics , 307(6):715 \u2013 729, 2007.", "Joseph Kirtland. Identification Numbers and Check Digit Schemes . The Mathematical Association of America, first edition, jan 2001.", "Hans Peter Luhn. Computer for verifying numbers, aug 1960. US Patent 2,950,048.", "David Salomon. Coding for Data and Computer Communications . Springer, 2005.", "Jacobus Verhoeff. Error detecting decimal codes. (mathematical centre tracts, 29). ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift f\u00fcr Angewandte Mathematik und Mechanik, 51(3):240\u2013241, 1971."]}
Structure-function correlations in erythropoietin formation and oxygen sensing in the kidney
Creators: name: Le Hir, M.
name: Eckardt, Kai-Uwe
name: Kaissling, B.
name: Koury, S. T.
name: Kurtz, Armin
Publisher: name: Universität Regensburg
Year: 1991
Subjects: subject: 570 Biowissenschaften, Biologie
subject: 610 Medizin
subject: Anemia/pathology
subject: Animals
subject: Anoxia/pathology
subject: Endothelium, Vascular/physiopathology
subject: Erythropoietin/biosynthesis
subject: Humans
subject: Kidney/physiopathology
subject: Kidney Tubules, Proximal/physiopathology
subject: Oxygen/blood

description: The kidney is the main site of erythropoietin (EPO) formation. Oxygen sensing in the kidney itself plays a major role in the control of EPO synthesis. By in situ hybridization it has been established that the EPO-producing cells are situated in the interstitium of the cortical labyrinth, but they have not been precisely identified. Morphological findings provide new insights into the location and mechanism of oxygen sensing in the kidney. In addition to causing an increase in the number of cells containing EPO messenger RNA, anemia provokes structural changes exclusively in the cortical labyrinth. Specifically, the fibroblasts become enlarged and show increased activity of 5'-nucleotidase, and the S1 segment of the proximal tubule shows similar alterations as in various models of hypoxia. Thus, structures that are situated in the close vicinity of the EPO-producing cells appear to be sensitive to decreased oxygen delivery.
Model and method to predict the turbulent kinetic energy induced by tidal currents, application to the wave-induced turbulence
Creators: name: Calvino, Clément
name: Furgerot, Lucille
name: Poizot, Emmanuel
name: Bois, Pascal Bailly du
name: Bennis, Anne-Claire
Publisher: name: arXiv
Year: 2023
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: A prediction model for the turbulent kinetic energy (TKE) induced by tidal-currents is proposed as a function of the barotropic velocity only, along with a robust method evaluating the different parameters involved using Acoustic Doppler Current Profiler (ADCP) measurements from Alderney Race. We find that the model is able to reproduce correctly the TKE profiles with coefficients of correlation on average higher than 0.90 and normalised root-mean-square errors (NRMSE) less than 14%. Different profiles are also tested for the mean velocity, no satisfactory prediction model is found but we are able to have decent estimates of the velocity shear and friction velocity. Two applications are then carried out. First the turbulent budget terms are estimated and discussed. We identify the turbulent production and dissipation of TKE as the most important mechanisms, then we discuss the validity of several theoretical results derived for isotropic turbulence for this application. A strong departure for the estimation of the turbulent dissipation is notably found and explained by the turbulent anisotropy. At last the prediction model for the TKE is used to infer the wave-induced TKE. We show the importance of removing the tidal component, waves can have a strong influence down to mid-depth.
Quantum field theoretic properties of Lorentz-violating operators of nonrenormalizable dimension in the fermion sector
Creators: name: Schreck, M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the current paper the properties of a quantum field theory based on certain sets of Lorentz-violating coefficients in the nonminimal fermion sector of the Standard-Model Extension are analyzed. In particular, three families of coefficients are considered, where two of them are CPT-even and the third is CPT-odd. As a first step the modified fermion dispersion relations are obtained. Then the positive- and negative-energy solutions of the modified Dirac equation and the fermion propagator are derived. These are used to demonstrate the validity of the optical theorem at tree-level, which provides a cross-check for the results obtained. Furthermore unitarity is examined and seems to be valid for the first set of CPT-even coefficients. However for the remaining sets certain issues with unitarity are found. The article demonstrates that the adapted quantum field theoretical methods at tree-level work for the nonminimal, Lorentz-violating framework considered. Besides, the quantum field theory based on the first family of CPT-even coefficients is most likely well-behaved at lowest order perturbation theory. The results are important for future phenomenological investigations carried out in the context of field theory, e.g., the computation of decay rates and cross sections at tree-level.
description: 35 pages, 3 figures; version 2.0: added results on reflexion positivity (unitarity), accepted for publication by Phys. Rev. D
Maximizing Neutrality in News Ordering
Creators: name: Advani, Rishi
name: Papotti, Paolo
name: Asudeh, Abolfazl
Publisher: name: arXiv
Year: 2023
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Computers and Society (cs.CY)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences
subject: F.2.2; G.2.2; K.4.1

description: The detection of fake news has received increasing attention over the past few years, but there are more subtle ways of deceiving one's audience. In addition to the content of news stories, their presentation can also be made misleading or biased. In this work, we study the impact of the ordering of news stories on audience perception. We introduce the problems of detecting cherry-picked news orderings and maximizing neutrality in news orderings. We prove hardness results and present several algorithms for approximately solving these problems. Furthermore, we provide extensive experimental results and present evidence of potential cherry-picking in the real world.
description: 14 pages, 13 figures, accepted to KDD '23
Serial immunoreactive erythropoietin levels in autologous blood donors
Creators: name: Lorentz, A.
name: Jendrissek, A.
name: Eckardt, Kai-Uwe
name: Schipplick, M.
name: Osswald, P. M.
name: Kurtz, Armin
Publisher: name: Universität Regensburg
Year: 1991
Subjects: subject: 570 Biowissenschaften, Biologie
subject: 610 Medizin
subject: Adult
subject: Aged
subject: Blood Donors
subject: Blood Transfusion, Autologous
subject: Erythrocyte Count
subject: Erythropoietin/metabolism
subject: Female
subject: Ferritins/metabolism
subject: Hemoglobins/metabolism
subject: Humans
subject: Iron/blood
subject: Male
subject: Middle Aged
subject: Reticulocytes/cytology

description: The variations in plasma erythropoietin (EPO) concentration during preoperative deposit of autologous blood were studied in 12 patients (8 men, 4 women). Four donations were scheduled at weekly intervals. A predonation hemoglobin concentration of 11 g per dL (110 g/L) was required. Hemoglobin concentration decreased from 14.3 +/- 1.1 g per dL (143 +/- 11 g/L) (mean +/- SD) before the first donation to 11.7 +/- 0.7 g per dL (117 +/- 7 g/L) on Day 22 (p less than or equal to 0.0001). Reticulocyte counts increased from a median of 31,800 (range, 4900-95,000) per microL (median, 32 x 10(9)/L [range, 5-95 x 10(9)/L]) to 93,800 (16,800-194,900) per microL (median, 94 x 10(9)/L [range, 17-195 x 10(9)/L]) on Day 28 (p less than or equal to 0.01). Plasma EPO concentration was 17.8 +/- 5.1 mU per mL prior to the first donation and displayed a small and transient peak after each donation. A sustained elevation followed each peak. Although plasma EPO concentration differed significantly from the baseline value after the first donation, only the peak concentrations after the second (35.5 +/- 15.5 mU/mL), third (38.0 +/- 14.5 mU/mL), and fourth (36.1 +/- 11.0 mU/mL) donations exceeded the normal range. The moderate, biphasic increase in plasma EPO concentration and the moderate increase in erythropoiesis suggest two strategies in autologous blood donation that should be investigated with respect to efficiency and safety: 1) more aggressive donation schemes, which reduce donation intervals and/or the minimum hemoglobin concentration and 2) the administration of recombinant human EPO.
Insulin-like growth factors decrease oxygen-regulated erythropoietin production by human hepatoma cells (Hep G2)
Creators: name: Scholz, H.
name: Baier, W.
name: Ratcliffe, P.
name: Eckardt, K.
name: Zapf, J.
name: Kurtz, Armin
name: Bauer, C.
Publisher: name: Universität Regensburg
Year: 1992
Subjects: subject: 570 Biowissenschaften, Biologie
subject: 610 Medizin
subject: Animals
subject: Culture Media
subject: Dose-Response Relationship, Drug
subject: Erythropoietin/biosynthesis
subject: Humans
subject: Insulin/pharmacology
subject: Insulin-Like Growth Factor I/pharmacology
subject: Insulin-Like Growth Factor II/pharmacology
subject: Liver Neoplasms/pathology
subject: Liver Neoplasms, Experimental/pathology
subject: Oxygen/pharmacology
subject: Receptor, Insulin/metabolism
subject: Receptors, Cell Surface/metabolism
subject: Receptors, Somatomedin
subject: Somatomedins/pharmacology
subject: Tumor Cells, Cultured

description: We examined the effects of insulin-like growth factors (IGFs) and insulin on erythropoietin (EPO) production by human hepatoma cells (Hep G2). Compared with normoxia (20% O2), EPO production by Hep G2 cells during a 72-h incubation was stimulated fivefold by exposure to low oxygen tension (1% O2) and nearly threefold by exposure to cobalt chloride (100 microM). IGF-I caused a concentration-dependent attenuation of EPO formation under normoxic conditions and inhibited (maximally 50%) EPO production stimulated by either low oxygen tension or cobalt [half-maximal effect (ED50) approximately 5 nM]. The increase of EPO mRNA levels in response to hypoxia was significantly reduced by IGF-I. Similarly to IGF-I, IGF-II (ED50 approximately 8 nM) and insulin (ED50 approximately 80 nM) also inhibited EPO formation in Hep G2 cells. IGF-I (100 pM-100 nM) stimulated the incorporation of radiolabeled alanine as a measure for total protein synthesis, 3H-labeled thymidine incorporation into DNA, and glycogen synthesis at 20 and 1% O2 in a concentration-dependent fashion. IGF-I exhibited a high affinity for the IGF-I receptor (apparent Kd approximately 3 nM). Unlabeled insulin was greater than 100-fold less potent than IGF-I in competing for 125I-IGF-I binding (apparent Kd approximately 360 nM). Conversely, insulin bound to the insulin receptor with high affinity (apparent Kd approximately 0.3 nM), whereas IGF-I was less than 1% as potent in competing for 125I-insulin binding. In summary, IGFs and insulin exert a negative control function on oxygen-regulated EPO production in Hep G2 cells. The inhibitory effect of IGFs and insulin on EPO formation appears to be mediated via the IGF-I receptor.