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Alternative kind of hydrogen atoms as a possible explanation for the latest puzzling observation of the 21 cm radio line from the early Universe

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Research in Astronomy and Astrophysics 2020年第7期20卷 172-176页

作者： eugene Oks Physics Department 380 Duncan DriveAuburn UniversityAuburnAL 36849USA

There is a puzzling astrophysical result concerning the latest observation of the absorption profile of the redshifted radio line 21 cm from the early Universe(as described in Bowman et al.). The amplitude of the profile was more than a factor of two greater than the largest predictions. This could mean that the primordial hydrogen gas was much cooler than expected. Some explanations in the literature suggested a possible cooling of baryons either by unspecified dark matter particles or by some exotic dark matter particles with a charge a million times smaller than the electron charge. Other explanations required an additional radio background. In the present paper, we entertain a possible different explanation for the above puzzling observational result: the explanation is based on the alternative kind of hydrogen atoms(AKHA),whose existence was previously demonstrated theoretically, as well as by the analysis of atomic experiments. Namely, the AKHA are expected to decouple from the cosmic microwave background(CMB) much earlier(in the course of the Universe expansion) than usual hydrogen atoms, so that the AKHA temperature is significantly lower than that of usual hydrogen atoms. This seems to lower the excitation(spin) temperature of the hyperfine doublet(responsible for the 21 cm line) sufficiently enough for explaining the above puzzling observational result. This possible explanation appears to be more specific and natural than the previous possible explanations. Further observational studies of the redshifted 21 cm radio line from the early Universe could help to verify which explanation is the most relevant.

关键词： Cosmology:Early Universe explanation of the puzzle of 21cm radio line Galaxies:intergalactic medium Cosmology:observations Cosmology:theory

DES map shows a smoother distribution of matter than expected:a possible explanation

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Research in Astronomy and Astrophysics 2021年第10期21卷 1-4页

作者： eugene Oks Physics Department 380 Duncan DriveAuburn UniversityAuburnAL 36849USA

The largest and most detailed map of the distribution of dark matter in the Universe has been recently created by the Dark Energy Survey(DES)*** distribution was found to be slightly(by a few percent)smoother and less clumpy than predicted by general *** result was considered as a hint of some new physical *** the present paper we offer a relatively simple model that could explain the above result without resorting to any new physical *** model deals with the dynamics of a system consisting of a large number of gravitating neutral particles,whose mass is equal to the mass of hydrogen *** central point of the model is a partial inhibition of the gravitation for a relatively small subsystem of the entire *** would be sufficient for this subsystem to constitute just about a few percent of the total ensemble of particles for explaining the few percent more smooth distribution of dark matter(observed by the DES team)compared to the prediction of general *** most viable candidate for the dark matter particles in this model is the second flavor of hydrogen atoms(SFHA)that has only S-states and therefore does not couple to the electric dipole radiation or even to higher multipole radiation,so that the SFHA is practically *** SFHA has experimental confirmation from atomic experiments,it does not go beyond the Standard Model,it is based on standard quantum mechanics and it explains puzzling astrophysical observations of the redshifted line 21 cm from the early ***,our model explaining the DES result of a little too smooth distribution of dark matter without resorting to any new physical laws seems to be self-consistent.

关键词： (cosmology:)dark matter gravitation atomic processes astroparticle physics

基于最佳住院时间的心力衰竭患者1年内再入院的影响因素

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临床心血管病杂志 2024年第2期40卷 142-149页

作者：罗豪刘延旭文聪崔扬扬杜林芹周阳郑健康沈秀峰 Ofe eugene Kwaku 王坤曾浪李仕康岳荣川川北医学院附属医院心血管内科四川南充637000

目的:评估心力衰竭(心衰)患者住院时间(LOS)与1年内再入院风险的关系,探索最佳LOS患者再入院的影响因素。方法:收集2018-01-01—2020-12-31于川北医学院附属医院心血管内科住院治疗的心衰患者的临床资料,根据住院时间进行分组(LOS1:≤5d... 详细信息

目的:评估心力衰竭(心衰)患者住院时间(LOS)与1年内再入院风险的关系,探索最佳LOS患者再入院的影响因素。方法:收集2018-01-01—2020-12-31于川北医学院附属医院心血管内科住院治疗的心衰患者的临床资料,根据住院时间进行分组(LOS1:≤5d、LOS2:6~10d、LOS3:11~15d、LOS4:≥16d),通过单因素logistic回归分析展示不同LOS组与再入院的关系,筛选出OR比值最低的LOS组,根据1年内因心衰再入院的随访结果,把OR值最低的LOS患者分为再入院组、非再入院组,比较两组患者之间的基线资料,将差异有统计学意义的变量纳入多因素logistic回归分析,绘制受试者工作特征曲线(ROC)。结果:通过单因素回归分析可知,LOS2组患者OR值最低,共649例患者,其中再入院组为216例,非再入院组为433例;通过多因素logistic回归分析可知吸烟史、血同型半胱氨酸(Hcy)、N型末端脑钠肽前体(NT-proBNP)以及肾小球滤过率(eGFR)是LOS2组心衰患者1年内再入院的独立影响因素(P<0.05)。ROC曲线分析显示吸烟史、Hcy、eGFR、NT-proBNP单独以及联合预测LOS2患者1年内再入院的ROC曲线下面积(AUC)分别为0.594、0.627、0.643、0.733、0.775。结论:LOS2再入院风险最低。吸烟史、Hcy、NT-proBNP以及eGFR在LOS2组患者1年内再入院的风险中表现出良好的预测价值。

关键词：心力衰竭住院时间再入院影响因素风险预测模型

Reminiscing my sixty year pursuit of the physics of the Sun and the Galaxy

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Research in Astronomy and Astrophysics 2014年第1期14卷 1-14页

作者： eugene N.Parker Department of Physics Department of Astronomy and AstrophysicsUniversity of Chicago

Reminiscing begins with childhood and passes on to student days through graduate school and the first real contact with research. Then early academic posi- tions and stumbling efforts to pursue my ideas. The first significant progress came as a research associate with Prof. W. M. Elsasser at the University of Utah, beginning with an introduction to magnetohydrodynarnics and the generation of the geomagnetic field through induction in the liquid metal core of Earth. A move to the University of Chicago to work with Prof. J. A. Simpson, on the implications of cosmic ray varia- tions and interplanetary magnetic fields, led to the theory of coronal expansion and the solar wind and then to exploring the dynamical effects of cosmic rays on the galactic magnetic field. Spontaneous current sheets and intrinsic rapid reconnection in interlaced magnetic field line topologies were the next big project, leading up to retirement. Finally, it is a pleasure to recall my many associates, whose fresh thinking helped stimulate the daily research activities.

关键词： dynamo -- magnetohydrodynamics -- plasma

Epidemiological and Clinical Profile of Children Exposed to SARS-CoV-2 at the COVID-19 Treatment Center at the ISIRO Hospital and WATSA in the Democratic Republic of the Congo

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Journal of Biosciences and Medicines 2024年第9期12卷 73-81页

作者： Hilaire Lisimo Abwa David Azako Michel Ngbatala Bienvenu Apenya Jolie Mambeizidra Julbert Malangu eugene Kumbodimo George Mutuale Herman Luhavo Jean Claude Gbundu Fiston Bolanda François Enze Marie Tasile Yvette Kpakpo Nyange Nicholas Katembo Clinics Universitaires Uele Department of Pediatrics Faculty of Medicine University of Uele Isiro Democratic Republic of the Congo General Hospital of Isiro Isiro Democratic Republic of the Congo Division Provinciale de la Sant du Haut Ul Isiro Democratic Republic of the Congo Additional Vaccination Program for Watsa Watsa Democratic Republic of the Congo Center Hospitalier KIBALI Durba Democratic Republic of the Congo Hospital General of Watsa Watsa Democratic Republic of the Congo

Introduction: COVID-19, an emerging infectious disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), typically presents with mild clinical manifestations in pediatric populations. As in many other regions of the Democratic Republic of the Congo (DRC), the COVID-19 pandemic affected children in Haut-Uélé, a province bordering South Sudan and Uganda. This study aimed to describe the epidemiological profile of COVID-19 in pediatric population in this area. Materials and Methods: This descriptive cross-sectional study was conducted over a 6-month period from August 1, 2021 to February 7, 2022. It included all patients aged 0 to 19 years with confirmed COVID-19 using RT-PCR and managed at the COVID-19 Treatment Centers (CTCO) in ISIRO and WATSA. Data were collected from patient records supplemented by the dataset from the service of Health Information System (SNIS) and the Epidemiological Surveillance Commission of the Provincial Health Division (DPS). Epidemiological and clinical profiles were analyzed. All statistical analyses were performed using SPSS software, Version 18. Results: During the 4th wave of the pandemic, 5 out of 13 health zones in Haut-Uélé province were affected, with a total of 569 recorded cases;45 of them were children aged 0 to 19 years (7.9%). Asymptomatic cases accounted for 33.3% (15 cases). The mean age was 9.88 ± 5.49 years, with the most affected age group being 10 - 14 years (44.45%). There was a predominance of males (73.3%), with a male-to-female sex ratio of 2.75. Half of the patients (53.3%) were from Watsa Health Zone. A seasonal peak was observed between December and January. Comorbidities were present in 10% of infected patients, and nearly half of participants were contacts of infected individuals. The primary reasons for admission were fever (66.66%), followed by rhinorrhea (57.77%) and cough (31.11%). All patients responded favorably to treatment. Conclusion: The proportion of pediatric COVID-19 cases at t

关键词： COVID-19 Morbi-Mortal Emergency Haut-Uélé

Preservation of Linear Constraints in Approximation of Tensors

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Numerical Mathematics(Theory,Methods and Applications) 2009年第4期2卷 421-426页

作者： eugene Tyrtyshnikov Institute of Numerical Mathematics of Russian Academy of Sciences

For an arbitrary tensor(multi-index array) with linear constraints at each direction,it is proved that the factors of any minimal canonical tensor approximation to this tensor satisfy the same linear constraints for t... 详细信息

关键词： Multi-index arrays tensors linear constraints low rank approximation canonicaltensor decomposition multilevel matrices.

A practical geometrical comparison between free-repelled hydraulic jumps within inclined channels

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Science China(Technological Sciences) 2009年第11期52卷 3363-3367页

作者： John Demetriou eugene Retsinis National Technical University of Athens School of Civil Engineering. JD Research Hydrolab-A non Profit Foundation 12 Polykarpou St. N. Smymi Athens 17123 Greece National Technical University of Athens School of Civil Engineering. 23 Loid Tzortz St. Athens 11744 Greece

In this experimental study a practical geometrical comparison between inclined (angle φ) free and repelled hydraulic jumps (the latter in non prismatic but abruptly expanding channels) is presented, analysed and discussed. For repelled hydraulic jumps a considerable parameter is the expansion ratio r (=channels' width ratio), which here is changing from r =0.5 to r =0.7. The comparison is made with the free jump (in prismatic channel, r =1), in the same ranges of angles φ (0°≤φ≤8°) and Froude numbers (2≤Fr1≤8). A practical arithmetic example is presented to show the behavioral change of conjugate depths, lengths L and depths at 0.5L, in order to receive a comparison among all pertinent geometrical quantities. The present results may be useful for the hydraulic engineering when designing open channels.

关键词： free jumps repelled jumps inclined channels

Building the Capacity of Health Professionals in Monitoring and Evaluation in a Public Health Institution: Experience of the National Institute of Public Health (NIPH) of Côte d’Ivoire

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Health 2024年第8期16卷 731-749页

作者： Esme Marie Laure Essis N’guetta Mathilde Manouan Anna-Corine Estell Liema Bissouma Ethmonia Kouamé Ekissi Orsot Tetchi Sagou Olivier Yayo Stephane Claon Yao eugene Konan William Yavo Agbaya Stephane Oga Tenenan Jean Marie Yeo Joseph Aka National Institute of Public Health Abidjan Cte dIvoire Cellule de Recherche en Sant de la Reproduction de Cte dIvoire (CRESAR-CI) Abidjan Cte dIvoire Department of Public Health and Biostatistics UFR of Medical Sciences Felix Houphout Boigny University Abidjan Cte dIvoire Department of Public Health UFR of Pharmaceutical and Biological Sciences Felix Houphout Boigny University Abidjan Cte dIvoire

Background: In the context of the fight against HIV, a lack of skills in monitoring and evaluating the personnel in charge of activities has been identified at the national level. It was the subject of a priority axis of the national plan for monitoring and evaluating the fight against HIV (2006-2010) that was aimed at strengthening the capacities of actors in this area. To increase the critical mass of competent human resources in the short term, the National Institute of Public Health (NIPH) of Côte d’Ivoire organized monitoring and evaluation training sessions for healthcare professionals from 2011 to 2016. Methods: A single case study with multiple levels of analysis was carried out, combining a qualitative survey and a literature review. An evaluation was carried out six months after each training session. In addition, the results of the pre- and post-tests and of the daily and final evaluations that accompanied the various training sessions were used to provide further information. The qualitative data collected were analyzed using INVIVO 15 software. Results: Some 89 health professionals (69% men and 31% women) working at the national level (51% at the central level, including 58% in health programs) and in development partner agencies (37%) participated in this capacity building program. Most participants were senior health managers (56%), data managers (23%), and statisticians and computer scientists (10%). Almost all the trainings were financed by 16 technical and financial partners (85%), mainly the MEASURE Evaluation project (27%). Conclusion: M&E training, despite all its imperfections, has made it possible to identify M&E training needs at the national level and to increase the critical mass of national skills and to have some culture in M&E.

关键词： Short-Term Training Capacity Building Monitoring and Evaluation Health Professional Africa Côte d’Ivoire

Age and chemical composition of the globular cluster NGC 6652

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Research in Astronomy and Astrophysics 2020年第8期20卷 252-260页

作者： Margarita eugene Sharina Vladislav Vladimirovich Shimansky Special Astrophysical Observatory Russian Academy of SciencesNizhnii Arkhyz369 l67Russia Kazan Federal University 18 Kremlyovskaya streetKazan420008Russia

We present the results of determination of the age,helium mass fraction(Y),metallicity([Fe/H]),and abundances of the elements C,N,O,Na,Mg,Ca,Ti,C and Mn for the Galactic globular cluster NGC *** use its medium-resolution integrated-light spectrum from the library of Schiavon and our population synthesis method to fulfill this *** select the evolutionary isochrone and stellar mass function for our analysis,which provide the best approximation to the shapes and intensities of the observed Balmer line *** determined elemental abundances,age and metallicity are characteristic of stellar populations in the Galactic Bulge.

关键词： globular clusters:general globular clusters:abundances globular clusters:individual:NGC 6652