bluuebunny/crossref_metadata_2025 huggingface dataset:
Chronic periodontitis in a group of patients with chronic autoimmune thyroiditis – particularities of expression
Authors:   Circo Dentistry, Bucureşti, România, Circo Răzvan , Gosu Cristina ,   Circo Dentistry, Bucureşti, România, Badea Victoria ,   Disciplina Imunologie, Facultatea de Medicină Dentară, Universitatea „Ovidius“, Constanţa, România
Published: June 2021

Objectives. The intricacy of the inflammatory / infiltrative process common to chronic autoimmune thyroid disease and periodontal disease (CP) justifies the study of the incidence and expression peculiarities of periodontal lesions encountered in patients with chronic autoimmune thyroiditis (CAT). The presence of periodontal plaque correlated with the oral hygiene index represents a proof of the microbial aggression, as a "trigger" in initiating the pathological process with a progressive evolution. Material and method. The study included patients with CP: group 1 – associating CAT, group 2 – without thyroid disease. The periodontal status was assessed: mild, medium, aggravated. Statistically correlated variables: periodontal lesions, sex, age of patients, OHI-s, thyroid functional status (TSH), serum level of thyroid autoantibodies (ATPO / ATg) and antinuclear antibodies (ANA). Results. A heterogeneity of the distribution of periodontal lesions in both groups was found. The preponderance of lesions with statistical significance (p < 0.001) predominated for study group 1. Aggravated periodontal status: more common in group 1 (p = 0.043), was not influenced by the sex of the patients. The monofactorial linear regression finds the average interdependence between the OHI-s value and the age of the patients (r = 0.63; p = 0.018) and the TSH problem (r = 0.55; p = 0.0003). The multifactorial linear regression, however, attests a direct proportional relationship between OHI-s and TSH, ATPO, ATg (r = 0.56; p = 0.001) and intensified with age (r = 0.78, p <0.001). Effect on OHI-s calculated by ANOVA test: ATPO (Pr = 78.66%; r = 0.73; p = 0.05); ATg (Pr = 94.06%; r = 0.73; p = 0.042); both antibodies (Pr = 96.28%, r = 0.87; p = 0.003), correlated with age (r = 0.99; p <0.001). No statistical correlation for ANA was found. Conclusions. The presence and progressive characteristics of CP in patients with CAT attests the etiopathogenic interference of the two diseases and requests an interdisciplinary therapeutic attitude.
Ileo-perineal fistula: Rare late complication after rectal amputation – clinical case
Authors:   Facultatea de Medicină, Universitatea Transilvania, Brașov, România, Toader Andrei Iulian ,   Spitalul Clinic Judeţean de Urgenţă, Brașov, România, Cobelsch Călin Pavel ,   Facultatea de Medicină, Universitatea Transilvania, Brașov, România,   Spitalul Clinic Judeţean de Urgenţă, Brașov, România, Mironescu Aurel ,   Facultatea de Medicină, Universitatea Transilvania, Brașov, România,   Spitalul Clinic de Copii, Brașov, România, Gheorghiu Alfred Redalf Alain ,   Facultatea de Medicină, Universitatea Transilvania, Brașov, România,   Spitalul Clinic Judeţean de Urgenţă, Brașov, România, Maier Adrian ,   Spitalul Clinic Judeţean de Urgenţă, Brașov, România, Toader Andreea Mădălina ,   Spitalul Clinic Judeţean de Urgenţă, Brașov, România
Published: June 2021

Abdominal-perineal rectal amputation retains a well-defined place in the surgical treatment of rectal cancer, despite technical advances. The authors present the case of a 67-year-old patient who developed an entero-perineal fistula involving the last ileal loop, two years after an abdominal-perineal rectal amputation for a radiotreated rectal neoplasm. For surgical treatment of the fistula, right ileo-hemicolectomy with ileo-transverse anastomosis were performed. The fistulous tract is treated by soft field typhoon meshing in the same manner of treating the perineal wound after rectal amputation. The evolution is favorable, with the closure of the perineal wound, 6 weeks after surgery. The peculiarity of the case consists in the way of surgical solution. This case presentation is important due to the rarity of the ileo-perineal fistula after amputation of the rectum, as well as due to the particular way of surgical resolution.
Role of cystitis glandularis and intestinal metaplasia in the development of a bladder benign polypoid tumor in a pediatric patient (case report)
Authors:   Department of Pediatric Surgery, “Victor Gomoiu” Clinical Hospital for Children, Bucharest, Romania, Popescu Maria , Dragan Gabriel ,   Department of Pediatric Surgery, “Victor Gomoiu” Clinical Hospital for Children, Bucharest, Romania
Published: June 2021

Benign tumoral bladder tumors in children are extremely rare. The inflammatory condition determined by the presence of glandular cystitis and intestinal metaplasia, coexisting or separately, can be a determinant factor for the development of these bladder masses. Both entities have been suggested to represent a precursor for bladder adenocarcinoma. We present the case of an autistic adolescent that presented with a polypoid bladder mass and urinary tract infection. We performed a cystoscopic examination and biopsy of the tumor and due to the large dimensions and preliminary histological results we decided to perform a laparotomy and excision of the mass and bladder wall that was attached to. Post operatory evolution and follow-up showed no recurrence or progression of the dysplasia towards adenocarcinoma.
Dr. Edward Hartley Angle, the founder of modern orthodontics – part II
Authors:   ”Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, Beuran Irina Adriana , Ionescu Ileana ,   ”Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, Burlibaşa Mihai ,   ”Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, Cristache Corina Marilena ,   ”Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, Perieanu Viorel ,   ”Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, Perieanu Mădălina ,   ”Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, Babiuc Iuliana ,   ”Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, Eftene Oana ,   ”Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, Maliţa Mădălina ,   ”Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, Burcea Claudia-Camelia ,   ”Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, Neagoe Ioana-Cristina ,   University of Pitesti, Romania, Costea Radu ,   ”Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, Drăgan Constantin Florin ,   ”Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, Burlibaşa Liliana ,   Faculty of Biology, University of Bucharest, Romania, Moraru Liliana ,   ”Titu Maiorescu” University, Bucharest, Romania
Published: June 2021

Edward Hartley Angle was an eminent American scientist, dentist, great inventor, being rightly considered to be the father of modern orthodontics. The great American scientist was the author of an impressive number of patents (46) and was the coordinator of 7 editions of some impressive orthodontic treatises. Thus, in this material, which we structured in 2 distinct parts, we tried to present as concisely as possible the most important data from the biography of Dr. Edward Hartley Angle.
The concept of public health. Types of health systems. Parallel between the Romanian and the Australian health system
Authors:   Facultatea de Medicină şi Farmacie, Universitatea din Oradea, România, Dulău Dorel ,   Primăria Municipiului Oradea, România, Bungău Simona ,   Facultatea de Medicină şi Farmacie, Universitatea din Oradea, România, Daina Lucia ,   Facultatea de Medicină şi Farmacie, Universitatea din Oradea, România,   Spitalul Clinic Judeţean de Urgenţă, Oradea, România, Buhaş Camelia ,   Facultatea de Medicină şi Farmacie, Universitatea din Oradea, România,   Serviciul Judeţean de Medicină Legală Bihor, România, Balaşco Ioana Anca ,   Primăria Municipiului Oradea, România, Cotrău Petre ,   Facultatea de Medicină şi Farmacie, Universitatea din Oradea, România, Reştea (Iosub) Monica Elena ,   Facultatea de Medicină şi Farmacie, Universitatea din Oradea, România
Published: June 2021

Medical management is a field that combines, both in theory and in practice, two somewhat different domains, administration and the medical domain, creating a third area of activity, namely that of medical management. This review is part of a study of health services management, which seeks to find solutions to improve the efficiency of the the management and administration of the medical system, both locally and nationally. In order to be able to study and evaluate, from a scientific point of view, the concepts of centralization and decentralization of the public health system in Romania, it is absolutely pertinent, but also mandatory, to focus on defining the notion of health system. Only later can we approach and research the process of decentralization of health, the political and economic context in which it can be initiated, as well as how to activate and carry it out. Decentralization, as a phenomenon of the transfer of rights and obligations, from the level of the central authority to the level of the local authority, can take various forms. From a theoretical and practical point of view, the forms of decentralization can be studied, evaluated and concluded by emphasizing the strengths and weaknesses. Also important to study are the ways of putting health systems into practice, which from the point of view of the source of funding are divided into state-funded health systems (Semashko, Beveridge and Bismarck) and privately funded health systems.
Modern considerations on the predisposing factors in the etiopathogenesis of systemic lupus erythematosus
Authors:   Faculty of Medicine, “Titu Maiorescu“ University, Bucharest, Romania, Radulescu Ionica-Mariana ,   “Titu Maiorescu“ Policlinic, Regina Maria Private Health Network, Bucharest, Romania, Alecu Mihail ,   Faculty of Medicine, “Titu Maiorescu“ University, Bucharest, Romania, Ion Laura ,   Faculty of Medicine, “Titu Maiorescu“ University, Bucharest, Romania,   “Titu Maiorescu“ Policlinic, Regina Maria Private Health Network, Bucharest, Romania, Moldovan Cosmin ,   Faculty of Medicine, “Titu Maiorescu“ University, Bucharest, Romania,   “Titu Maiorescu“ Policlinic, Regina Maria Private Health Network, Bucharest, Romania
Published: June 2021

Lupus erythematosus is an autoimmune disease with severe skin involvement and/or multisystemic implications characterized by the development of autoantibodies and immune complexes that, in turn, cause inflammation, tissue damage and a variety of clinical manifestations. The etiopathogeny of lupus erythematosus is very complex and still incompletely discovered. The onset of this disease or the episodes of exacerbation involves various factors: genetic, immune, hormonal, environmental but many more are still under research. There is strong evidence to back up the theory of an autoimmune disease, even though the precise mechanism is yet to be discovered. Apart from a preexisting background predisposing to lupus, certain triggers are required to act in a synergic way to determine the onset of the clinical signs. Studies show that it is 10-15 times more common in women of childbearing age than men, with a higher incidence amongst Afro-American population compared to Caucasians. The aim of this article is to shed some light on the most important determining and trigger factors involved in systemic lupus erythematosus by reviewing the most recent published data.
Insomnia as a predisposing factor for medical conditions
Authors:   Department of Family Medicine, “Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, Stanescu Ana Maria Alexandra , Nicolescu Oana ,   Department of Family Medicine, “Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, Stefanescu Alexandru Mihai ,   “Nicolae Malaxa” Clinical Hospital, Bucharest, Romania, Obilisteanu Gabriela Carmen ,   “Nicolae Malaxa” Clinical Hospital, Bucharest, Romania, Bejan Cristian Gabriel ,   Department of Family Medicine, “Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, Simionescu Anca Angela ,   Department of Obstetrics and Gynecology, “Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania,   “Filantropia“ Clinical Hospital, Bucharest, Romania
Published: June 2021

An essential aspect of human health is sleep. Sleep, among others, interacts with the immune system, plays a role in restoring the body's energy, healing and brain function. Insomnia is often noticed in medical practice, is considered a public health problem. Acute sleep deprivation can alter cognitive performance, and chronic sleep deprivation can lead to disease development. Lack of sleep affects all major systems in the human body, and the major changes that occur in chronic insomnia have been associated with many conditions such as type 2 diabetes, cardiovascular disease, asthma, thyroid disease and gastroesophageal reflux disease.
The role of the immune response in the etiopathogenesis of endometriosis
Authors:   Department of Obstetrics and Gynecology, ”Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, Stanica Catalina Diana , Neacsu Adrian , ,   Department of Obstetrics and Gynecology, ”Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, Sima Romina Marina ,   Department of Obstetrics and Gynecology, ”Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, Ioan Raluca Gabriela ,   Department of Obstetrics and Gynecology, ”Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania
Published: June 2021

Endometriosis is a benign, chronic, estrogen-dependent condition, present in 10% of women of reproductive age. The condition is associated with chronic pelvic pain and infertility that influence their quality of life, as well as married life and has important socio-economic consequences. Despite its high morbidity, its etiopathogenesis is incompletely known. A large number of studies suggest that the ability of endometrial implants to grow in ectopic locations may be correlated with the altered immune response towards the endometriotic tissue. There are enough data to show that immune system mediators, such as cytokines and chemokines, are playing key roles in the onset and olso on progression of endometriosis. There are studies that prove the association between endometriosis and autoimmune diseases. The present paper aims to investigate the implications of the immune response in the etiopathogenesis of endometriosis. The study of cellular or humoral immunity deficits, the presence of autoantibodies associated with this condition, can facilitate the understanding of the mechanisms that lead to the appearance and spread of endometriosis. We hope that this information will ultimately provide the basis for the development of new effective approaches in endometriosis management.
Глагольные имена в индоевропейских и семитских языках. Материалы для сравнительно-сопоставительного анализа на основе библейского текста
Authors: Baluta A. A.
Published: June 2021

Данное учебное пособие содержит материалы для сравнительно-сопоставительного анализа глагольных имен (инфинитив, герундий, герундив, супин, имя действия, причастие, деепричастие) и синтаксических конструкций с ними. Примеры из текстов Ветхого и Нового заветов приводятся на 16 языках (Ветхий Завет – 13 источников на 13 языках: русском, древнееврейском, древнегреческом, латинском, церковнославянском, болгарском, сербском, польском, чешском, английском, немецком, французском, идиш; Новый Завет – 14 источников на 6 языках: греческом койне, латинском, санскрите, старославянском, церковнославянском, русском). Переводы Нового Завета на старославянском, церковнославянском и русском языках отражают каждый исторический этап перевода Библии на русский язык (11 источников с IX по XIX век). Учебное пособие предназначено для студентов, магистрантов и аспирантов лингвистических и филологических факультетов, а также для широкого круга исследователей, работающих в области изучения Библии и сравнительно-исторического языкознания
Viability and phenotypic heterogeneity of Rhodococcus Rhodochrous CNMN-AC-05 in the presence of fullerene C60
Authors: POSTOLACHI Olga , RASTIMESINA Inna , JOSAN Valentina
Published: June 2021

Introduction. In recent years, due to wide applications of nanotechnologies in various fields, the safety of nanomaterials has become a pressing issue. Fullerene C60 is not an exception. Research on the activity of microorganisms and their interaction with nanoparticles is of major importance, both for microorganisms and for the ecosystem as a whole.

Material and methods. Fullerene C60 powder was purchased from Sigma-Aldrich. The object of study was R. rhodochrous CNMN-Ac-05 strain. The number of viable bacterial cells was estimated by colony-forming units (CFU). The morphological features of the rhodococci colonies have been described according to the usual microbiological method.

Results. It was established that fullerene C60 in concentrations of 1-25 mg/L fullerene C60 stimulated the growth of R. rhodochrous by 2.4-2.8 times. As the concentration of fullerene C60 increased up to 50-100 mg/L, the multiplication and growth of rhodococci decreased by 29.5% and 38% respectively. In the presence of 1-10 mg/L fullerene C60 the rhodococci population remained homogeneous, being composed of 100% S type colonies. The increase of fullerene C60 concentration led both to the decrease in the CFU number and to the appearance of R type colonies, up to 1.3% of population.

Conclusions. Fullerene C60 in concentrations 1-100 mg/L had no obvious toxic effect on the rhodococci strain. The optimum concentration is 10 mg/L. The concentrations higher than 25 mg/L led to the dissociation of rhodococcal population and diminution in the CFU counts, but not to the total inhibition.
Parasitic nematodes in potatoes of different varieties and their interrelations with some arthropods
Authors: MELNIC Maria , GLIGA Olesea , ERHAN Dumitru , RUSU Stefan , IORDOSOPOL Elena
Published: June 2021

Introduction. Potato (Solanum tuberosum L.) is susceptible to infestation with an associated complex of different species of parasitic and saprophytic nematodes, bacteria, fungi, and arthropods, which diminish the quality of the product. Material and methods. 10 varieties of potatoes were investigated (Agata, Albastriu-mov, Bella rosa, Concorde, Desiree, Irga, Iagodca, Roko, Romano, Sprinter), cultivated on the territory of the Republic of Moldova. The extraction of nematodes and mites was performed using the Baermann funnels, modified by Nesterov.Results. Multiannual researches on the degree of potato infestation have shown that tubers are preferred by various arthropods (Acaridae), Agriothes spp. (Elateridae), Gryllotalpa gryllotalpa, (Grillotalpidae) and Sciaridae spp . (Sciaridae), which form different interactions with the parasitic nematodes of tubers (Ditylenchus destructor, D. dipsaci).Conclusions. Solanum tuberosum infested by parasitic nematodes D. destructor in association with saprophytic nematodes and dry rot are colonized by nematophag ous (mites – 80%) and phytophagous arthropods (wireworms – 40%; mole cricket – 50%; flies – 40%). Among the researched arthropods, Rhizoglyphus echinopus were more frequently found, which together with other species actively consume the primary and secondary parasitic nematodes, their mortality constituting up to 90%. In the traumatized by some arthropods potatoes, with the soil, secondary parasitic nematodes, also penetrate, carrying bacterial and fungal infections, subsequently stimulating the total rot of potato tubers.
Analysis of clinical and molecular genetic characteristics of Wiskott-Aldrich syndrome and X-linked thrombocytopenia
Authors: TURCAN Doina , ANDRIES Lucia , DORIF Alexandr , SACARA Victoria
Published: June 2021

Introduction. Wiskott-Aldrich syndrome is a rare X-linked disorder characterized by microthrombocytopenia, eczema, and recurrent infections. It is caused by mutations of the WAS gene which encodes the WAS protein (WASp) – a key regulator of actin polymerization in hematopoietic cells. Mutations within the WASp gene result in a wide heterogeneity of clinical disease, ranging from ‘classical WAS’ to mild asymptomatic thrombocytopenia (X-linked thrombocytopenia [XLT]), or congenital neutropenia (X-lined neutropenia [XLN]).Case presentation. This present paper reports a phenotypical and laboratory description of two children diagnosed with WAS and one child diagnosed with XLT. The first case was a six months old male with septicemia, thrombocytopenia, eczema and petechial rash. The second case was a 2 years old boy presenting with complaints of recurrent infections, eczema and thrombocytopenia with small platelet size. The third case was a 16 years old boy who presented with thrombocytopenia and recurrent sinopulmonary infections.Conclusions. Due to a wide spectrum of clinical ﬁndings, the diagnosis of WAS/XLT should be considered in any male patient presenting with petechiae, bruises, and congenital or early-onset thrombocytopenia associated with small platelet size.
A new cosmic ray observation at Syowa Station in the antarctic
Authors: Kato Chihiro , Kihara Wataru , Ko Yukino , Munakata Kazuoki , Uchida Shin-ichi , Kaimi Sou , Kataoka Ryuho , Kadokura Akira , Evenson Paul , Nakamura Yoshiaki , Murase Kiyoka , Miyake Shoko
Published: June 2021

A set of Cosmic Ray detectors was newly installed in Syowa Station, in the Antarctic, to observe CR neutrons and muons simultaneously at the same location.
The observing system has started working in February 2018 and is in stable operation with a high operation rate, >90%. We describe the new systems and show its stability.
Son Trimestırdaki Gebelerin Üriner İnkontinans Yaşama Durumları ve Gebelik Deneyimlerinin İncelenmesi
Authors: ŞAHİN Eda , YEŞİLÇINAR İlknur , KUŞKANADI Büşra
Published: June 2021

Amaç: Gebelik süreci kadının kendini algılayışını etkilemektedir. Bunun yanında gebenin üriner inkontinans sorunu yaşaması gebeye ek zorluklar getirmektedir. Gebelerin üriner inkontinansa bağlı olarak yaşadığı sorunların gebelik deneyimlerini etkileyebileceği düşünülmektedir. Bu çalışmada son trimesterdeki gebelerin inkontinans yaşama durumları ve gebelik deneyimlerinin incelenmesi amaçlanmıştır.

Yöntemler: Prospektif tanımlayıcı nitelikteki bu araştırma Türkiye’nin güneydoğusunda yer alan bir ilde, Kadın Hastalıkları ve Çocuk Hastanesi Kadın Doğum Polikliniği’ne antenatal takip için başvuran gebeler üzerinde yapılmıştır. Araştırmaya 30-39. gebelik haftasında olan ve araştırmaya katılmayı kabul eden 143 gebe dahil edilmiştir. Araştırmada veri toplama araçları olarak, “Gebe Tanıtım Formu”, “Aşırı Aktif Mesane Değerlendirme Formu”, “Gebelik Deneyimleri Ölçeği” ve “İnkontinans Etki Anketi” kullanılmıştır. Araştırmaya ait veriler IBM SPSS 26.00 paket programı ile değerlendirilmiştir. İstatistiksel anlamlılık düzeyi p
Značaj feminističke ekonomije i ženskog poduzetništva za regionalni razvoj
Authors: Softić Lejla
Published: June 2021

Regionalni razvoj ne može se promatrati bez analize problematike tradicionalne ekonomije koja zanemaruje ulogu žena pri kreiranju bruto domaćeg proizvoda (BDP). Tradicionalna ekonomija ne mjeri adekvatno neplaćeni rad, obično žena pri obavljanju kućanskih poslova, brige o djeci i starijima, stoga feministička ekonomija zagovara da se istraži i
vrednuje doprinos neplaćenog rada žena pri kreiranju BDP-a. Cilj istraživanja je prezentirati nevidiljivi dio doprinosa ženskih poslova pri kreiranju BDP-a, ukazati na značaj ženskog poduzetništva i potaknuti
regionalni razvoj kroz edukaciju žena o poduzetništvu. U istraživanju se koristila PEST analiza trenutnog stanja u BiH, zasnovana na sekundarnim podacima iz zvaničnih statističkih i drugih relevantnih publikacija koje su nastale primarnim istraživanjem ove problematike u BiH. Izvršeno je i primarno istraživanje ciljanog uzorka ispitanika iz regije, a anketiranjem su potvrđeni prezentirani rezultati u PEST analizi. Naglasak u radu je na razvoju ženskog poduzetništva, ali i generalno na socio-ekonomskoj ulozi žena u BH ekonomiji, kao i na značaju podizanja nivoa svijesti o ovoj temi u regiji. U „Izvještaju o stanju ravnopravnosti spolova u BiH“
(Agencija za ravnopravnost spolova, 2018. godina), navodi se da je jednak broj dječaka i djevojčica, žena i muškaraca uključen u proces obrazovanja u BiH, ali su i dalje ograničene mogućnosti napredovanja za djevojčice/žene i pristup pozicijama za koje su potrebne visoke kvalifikacije, prije svega zbog postojanja stereotipa koji se odnose na muška/ženska zanimanja i pitanja usklađivanja profesionalnog i porodičnog života. Položaj većine žena u BH društvu je nezavidan, a njihova ekonomska i svaka druga sigurnost prilično upitna. Unatoč lošim uvjetima, žene u BiH uspjele su da opstanu, pokreću vlastite poslove i da se istovremeno uspješno brinu za svoje obitelji, ali i postanu pokretači promjena u BiH i regionalnog društvenog razvoja.
Knowledge management stocks in Serbian small and mid-sized enterprises
Authors: Babić Vojislav , Zarić Siniša
Published: June 2021

The
study measures and analyzes the representation level of the knowledge management
(KM) strategy in Serbian enterprises. KM is the skill of acquiring and
allocating knowledge resources in order to achieve greater business efficiency
and profitability of enterprises. The paper starts from Romer's (1986, 2018)
theory of increasing yields. According to Romer, a stable growth is the result
of endogenous accumulation of knowledge. The aim of this paper is to determine
the extent to which elements of KM are represented in small and mid-sized
Serbian enterprises. The instrument that was constructed for measuring KM
contained 11 variables, categorized into 5 complex indicators: academic
education, employee training, storage, dissemination and technical support. An
online questionnaire with closed responses, interval and Likert scales was used
for collecting the data. The survey was conducted on the sample of 157
enterprises in 15 Serbian cities, 60 of which were small and 34 mid-sized
enterprises. The data were processed by the 'custom tables with column
proportion of significance' statistical technique. Based on the results for
small and mid-sized enterprises, measurement indicators such as employee
training, dissemination and technical support show a positive level, while the
'storage' and 'academic education' indicator have a partial presence of KM
stocks. When it comes to small enterprises, in terms of individual variables
that are a constituent part of indicators, the largest stocks of KM were
measured with the variable ’number
of employees with bachelor’s degree’ where 98.3% of employees have a bachelor’s
degree, as well as with the variable 'presence of intranets', within which
96.7% of
enterprises are partially or fully associated with this medium. When it comes
to mid-sized enterprises, viewed by individual variables, the largest stocks of
KM are registered in the variables ’number of employees with bachelor’s degree' (100%) and 'frequency of attending educational seminars outside the
enterprise (94%).
Determining the Structure of Rotating Massive Stellar Cores with Gravitational Waves
Authors: Pajkos Michael A. , Warren MacKenzie L. , Couch Sean M. , O’Connor Evan P. , Pan Kuo-Chuan
Published: June 2021

The gravitational wave (GW) signal resulting from stellar core collapse encodes a wealth of information about the physical parameters of the progenitor star and the resulting core-collapse supernova (CCSN). We present a novel approach to constrain CCSN progenitor properties at collapse using two of the most detectable parts of the GW signal: the core-bounce signal and evolution of the dominant frequency mode from the protoneutron star. We focus on the period after core bounce but before explosion and investigate the predictive power of GWs from rotating CCSNe to constrain properties of the progenitor star. We analyze 34 2D and four 3D neutrino-radiation-hydrodynamic simulations of stellar core collapse in progenitors of varied initial mass and rotation rate. Extending previous work, we verify the compactness of the progenitor at collapse to correlate with the early ramp-up slope, and in rotating cases, also with the core angular momentum. Combining this information with the bounce signal, we present a new analysis method to constrain the pre-collapse core compactness of the progenitor. Because these GW features occur less than a second after core bounce, this analysis could allow astronomers to predict electromagnetic properties of a resulting CCSN even before shock breakout.
The Lopsided Distribution of Satellites of Isolated Central Galaxies
Authors: Wang 王 Peng 鹏 , Libeskind 李 Noam I. 诺 恩 , Pawlowski Marcel S. , Kang 康 Xi 熙 , Wang 王 Wei 伟 , Guo 郭 Quan 铨 , Tempel Elmo
Published: June 2021

Satellites are not randomly distributed around their central galaxies but show polar and planar structures. In this paper, we investigate the axis asymmetry or lopsidedness of satellite galaxy distributions around isolated galaxies in a hydrodynamic cosmological simulation. We find a statistically significant lopsided signal by studying the angular distribution of the satellite galaxies’ projected positions around isolated central galaxies in a two-dimensional plane. The signal is dependent on galaxy mass, color, and large-scale environment. Satellites that inhabit low-mass blue hosts, or located further from the hosts, show the most lopsided signal. Galaxy systems with massive neighbors exhibit stronger lopsidedness. This satellite axis-asymmetry signal also decreases as the universe evolves. Our findings are in agreement with recent observational results and they provide a useful perspective for studying galaxy evolution, especially on the satellite accretion, internal evolution, and interaction with the cosmic large-scale structure.
The MAVERIC Survey: Dynamical Origin of Radio Sources in Galactic Globular Clusters
Authors: Zhao Yue , Heinke Craig O. , Shishkovsky Laura , Strader Jay , Chomiuk Laura , Maccarone Thomas J. , Bahramian Arash , Sivakoff Gregory R. , Miller-Jones James C. A. , Tremou Evangelia
Published: June 2021

We investigate potential correlations between radio source counts (after background corrections) of 22 Galactic globular clusters (GCs) from the MAVERIC survey and the stellar encounter rates (Γ) and masses (M) of the GCs. Applying a radio luminosity limit of

, we take a census of radio sources in the core and those within the half-light radius of each cluster. By following a maximum likelihood method and adopting a simplified linear model, we find an unambiguous dependence of core radio source counts on Γ and/or M at 90% confidence, but no clear dependence of source counts within the half-light radius on either Γ or M. Five of the identified radio sources in GC cores above our adopted limit are millisecond pulsars or neutron star X-ray binaries, the dependence of which on Γ is well known, but another is a published black hole (BH) X-ray binary candidate, and 10 others are not identified. Accounting for these verified cluster members increases the significance of the correlation with M and/or Γ (to 99% confidence) for fits to core and half-light region source counts, while excluding a dependence on Γ alone at 90% (core) and 68% (half-light) confidence. This is consistent with published dynamical simulations of GC BH interactions that argue Γ will be a poor predictor of the distribution of accreting BHs in GCs. Future multiwavelength follow-up to verify cluster membership will enable stronger constraints on the dependence of radio source classes on cluster properties, promising a new view on the dynamics of BHs in GCs.
Investigation of the Long-term Variation of Solar Ca ii K Intensity. I. Density-to-intensity Calibration Formula for Historical Photographic Plates
Authors: Kakuwa Jun , Ueno Satoru
Published: June 2021

This paper presents a novel formula to convert photographic density into intensity for historical photographic plates of the Sun. Photographic photometry is of great importance as the very first step of analyzing century-long archived photographic data to study the long-term variation. The calibration formula is newly developed by using the intensity fluctuation originating in the network pattern in the quiet region, taking into consideration the nonlinearity between the density and the intensity. The formula is useful especially when experimentally obtained characteristic curves are insufficient for homogeneous analysis of a whole long-term data set. An example procedure of the calibration using the formula is demonstrated. Resultant intensity images calibrated from the photographic data can reproduce both the fluctuation and the center-to-limb variation of modern reference data. The calibration procedure is also tested with a whole twentieth century data set and shows good performance, while the preliminary result of the long-term intensity variation seems to be partially affected by the quality of the original plates. The resultant solar Ca II K intensity variation will be updated and discussed in a subsequent paper with the comparison to the solar UV variation related to the terrestrial environment.
A new species of Pseudasphondylia (Diptera: Cecidomyiidae) associated with Magnolia kobus DC. var. borealis Sarg. (Magnoliaceae) in Japan
Authors: Matsuda Hiroki , Elsayed Ayman , Kim Wanggyu , Yamauchi Satoshi , Libra Martin , Kamata Naoto , Yukawa Junichi , Tokuda Makoto
Published: June 2021

A gall midge species (Diptera: Cecidomyiidae) inducing leaf bud galls on Magnolia kobus DC. var. borealis Sarg. (Magnoliaceae) was found in Hokkaido and northern Honshu, Japan.

Based on its morphology, the species is regarded as an undescribed species of the genusPseudasphondyliaMonzen (Cecidomyiinae, Cecidomyiidi, Asphondyliini). The species is herein described asPseudasphondylia saohimeaMatsuda, Elsayed and Tokudasp. n.The new species is easily distinguishable from its congeners by the number of adult palpal segments and the shape of the male terminalia and larval spatula.
Unravelling unexplored diversity of cercosporoid fungi (Mycosphaerellaceae, Mycosphaerellales, Ascomycota) in tropical Africa
Authors: Meswaet Yalemwork , Mangelsdorff Ralph , Yorou Nourou S. , Piepenbring Meike
Published: June 2021

Cercosporoid fungi (Mycosphaerellaceae, Mycosphaerellales, Ascomycota) are one of the largest and most diverse groups of hyphomycetes causing a wide range of diseases of economically important plants as well as of plants in the wild. Although more than 6000 species are known for this group, the documentation of this fungal group is far from complete. Especially in the tropics, the diversity of cercosporoid fungi is poorly known. The present study aims to identify and characterise cercosporoid fungi collected on host plants belonging to Fabaceae in Benin, West Africa. Information on their morphology, host species and DNA sequence data (18S rDNA, 28S rDNA, ITS andtef1) is provided. DNA sequence data were obtained by a simple and non-culture-based method for DNA isolation which has been applied for cercosporoid fungi for the first time in the context of the present study. Among the loci used for the phylogenetic analysis,tef1provided the best resolution together with the multigene dataset. Species delimitation in many cases, however, was only possible by combining molecular sequence data with morphological characteristics. Based on forty specimens recently collected in Benin, 18 species are presented with morphological descriptions, illustrations and sequence data. Among these, six species in the genusCercosporaand two species inPseudocercosporaare proposed as species new to science. The newly described species are Cercospora (C.) beninensis onCrotalaria macrocalyx,C. parakouensisonDesmodium tortuosum,C. rhynchophoraonVigna unguiculata,C. vignae-subterraneaeonVigna subterranea,C. tentaculiferaonVigna unguiculata,C. zorniicolaonZornia glochidiata,Pseudocercospora sennicolaonSenna occidentalisandPseudocercospora tabeionVigna unguiculata. Eight species of cercosporoid fungi are reported for Benin for the first time, three of them, namely C. cf. canscorina, C. cf. fagopyri andC. phaseoli-lunatiare new for West Africa. The presence of two species of cercosporoid fungi on Fabaceae previously reported from Benin, namelyNothopassalora personataandPassalora arachidicola, is confirmed.
« Colomb ignorant trouva le nouveau monde » : ignorance, découverte fortuite et expérimentation à la première modernité
Authors: Parageau Sandrine
Published: June 2021

Cet article part du topos de la découverte par hasard, qui, à la première modernité, est souvent attribuée à des « ignorants ». En effet, il est généralement admis alors que la découverte de l’Amérique, l’invention de la poudre à canon, de la boussole, de l’imprimerie ou encore de la première lunette astronomique auraient été faites par hasard par des hommes qui n’étaient pas formés aux sciences. À partir de ce topos , l’article pose deux questions : d’une part, l’ignorant possède-t-il des qualités spécifiques, en tant qu’ignorant, qui le rendent plus susceptible que le savant d’être à l’origine de découvertes fortuites ? D’autre part, le mode de connaissance que constitue la découverte fortuite est-il pris en compte dans les programmes d’avancement du savoir à la première modernité ou bien est-il au contraire écarté car il représenterait une forme non méthodique et donc non scientifique d’accès au savoir ? Pour répondre à ces questions, l’article montre en particulier le rôle de la sagacité dans la découverte par hasard et la manière dont cette qualité peut être mise au service d’une méthode, notamment dans le cadre de l’ experientia literata de Francis Bacon, qui prévoit d’insérer le hasard au sein même du processus d’expérimentation.
Obtaining Quality in Marginal Places: The Clocks and Quadrants of the Clementinum Observatory in Prague in the 18th Century
Authors: Gluch Sibylle
Published: June 2021

La multitude d’observatoires fondés au xviii e  siècle témoigne de façon impressionnante de l’essor qu’a connu l’astronomie durant cette période. Cependant, beaucoup de ces nouveaux établissements étaient petits et éloignés des hauts lieux de l’astronomie. Si les astronomes y oeuvrant jouissaient souvent d’une réputation locale, ils étaient en revanche rarement connus à l’échelle internationale et leurs réseaux étaient donc restreints. Alors, où achetaient-ils leurs instruments ? Quels moyens utilisaient-ils ? Quelle qualité pouvaient-ils obtenir ? Ce sont des points que l’article cherche à explorer en prenant l’exemple de l’observatoire jésuite Clementinum à Prague. L’étude se concentre sur les quadrants et les horloges acquis vers le milieu du xviii e  siècle. Elle retrace les sources d’information de l’astronome ainsi que le processus d’évaluation et explique les difficultés liées à l’acquisition des connaissances techniques nécessaires, qui ne pouvait reposer sur le seul recours à des sources d’information de seconde main, comme les lettres et les livres, mais devait aussi être fondée sur une expérience personnelle. Dans ce contexte, les astronomes avaient tendance à se tourner vers les fabricants locaux, car c’étaient surtout les contacts personnels, et non la renommée proclamée d’un fabricant, qui déterminaient le choix d’un instrument. La qualité ainsi obtenue est vérifiée à l’aide des registres courants des horloges Clementinum. Leur analyse sert également à présenter les premiers résultats d’un projet de recherche en cours sur le degré de précision atteint par les horloges du xviii e  siècle qui étaient utilisées à des fins astronomiques.
Savoirs et connaissances savantes sur un déchet protéiforme : les mâchefers (France, XVI e -XXI e siècle)
Authors: Letté Michel
Published: June 2021

Le terme mâchefer apparaît aux environs du xvi e  siècle pour désigner le produit de la combustion des matières. D’abord déchet artisanal ou industriel, il est aujourd’hui issu pour l’essentiel de l’incinération des ordures ménagères. Une multitude de savoirs et de connaissances savantes lui sont associés au fil de ses usages, des expérimentations et de sa gestion à titre de déchet ou de matériau recyclable. Cet article a pour objet de procéder à l’inventaire de leurs formes et contenus afin de dégager les points saillants d’une production d’information technoscientifique désormais indispensable pour éclairer les usages et controverses dont les mâchefers sont l’objet au travers de leur réemploi, entre solution et problème.
La conceptualisation de l’organisation chez Norbert Wiener entre science et ontothéologie
Authors: Rappin Baptiste
Published: June 2021

Si les Anciens voyaient le monde comme un cosmos , c’est-à-dire comme un tout harmonieusement arrangé, il semble bien que les Modernes y décelèrent plutôt un ensemble d’organisations. Comment s’est construit ce dernier concept ? Et comment le définir ? C’est à ces questions que le présent article tente de répondre, en montrant comment l’organisation fut d’abord le fruit de la réflexion des fondateurs de la biologie moderne, puis l’élaboration des cybernéticiens, qui la couplèrent à l’information dans la boucle de rétroaction. C’est dans ce cadre que nous nous pencherons plus précisément sur la pensée de Norbert Wiener.
Sustainable value co-creation as a vector for valuation brand equity
Authors: Mlika Nour El Houda , Debabi Dorsaf Dellech
Published: June 2021

La co-création de valeur durable a un rôle crucial dans les pratiques de développement durable des entreprises, la nécessité d’une meilleure compréhension des conséquences de cette collaboration entre l’entreprise et ses clients est toujours d’actualité et nous renvoie à l’étude de son intérêt et de ses conséquences. Cette recherche vise à examiner l’impact des actions de co-création durable sur la réputation et le capital marque de l’entreprise. C’est dans ce sens que nous entreprenons cette recherche pour montrer dans quelle mesure le développement durable peut contribuer à améliorer la notoriété et l’image de marque de l’entreprise ? Une étude quantitative a été menée auprès de 84 clients « co-créateurs de valeur durable » dans le cadre d’une action menée par une société de services. Les résultats de cette recherche ont révélé que la co-création de valeur durable est un antécédent de la réputation de l’entreprise et a une influence positive sur celle-ci. De son côté, la réputation influence le capital de la marque. La relation entre ces deux variables est positivement influencée par la crédibilité de la marque. C’est en ce sens, que d’un point de vue managérial, cette recherche aidera les professionnels à mieux comprendre et anticiper les réactions comportementales des consommateurs co-créateurs en les invitant à participer au développement durable. Par ailleurs, le consommateur recherche un lien social dans le processus de co-création, il est donc important, pour l’entreprise, de le placer au centre de l’activité de co-création de valeur pour qu’il soit plus satisfait. Impliqué dans l’action il peut, ainsi, mieux juger l’entreprise.
Key consensus factors as a tool for project-oriented marketing organizations
Authors: Mesly Olivier , Réthoré Christophe
Published: June 2021

Cet article présente les facteurs clés de consensus (FCC, ou en anglais KCF) qui contribuent à une confiance mutuelle et à une coopération efficace entre les parties prenantes des organisations marketing axées sur les projets qui aspirent à travailler ensemble pour assurer la réussite de l’entreprise. Les résultats des dix-huit entretiens semi-dirigés et des deux groupes de discussion que nous avons menés sur quatre ans nous amènent à proposer quatre facteurs clés de consensus (KCF) : 1) l’établissement de normes comportementales, y compris l’écoute mutuelle ; 2) le respect méticuleux de la triple contrainte calendrier tâches/activités, coûts et qualité ; 3) la mise en place d’un système de croyances communes avec un objectif clair en tête ; et 4) l’anticipation prudente des risques inattendus Cet article apporte une contribution empirique au concept de facteur clé de consensus (FCC), peu abordé dans la recherche en marketing et en gestion de projet, afin de lier les FCC aux notions plus traditionnelles de facteur clé de succès (FCS) et de facteur clé d’échec (FCE). Les études sur les FCS et les FCE sont très nombreuses, surtout dans le domaine de la gestion de projet, mais celles sur les FCC sont beaucoup plus rares. A notre connaissance, aucune recherche n’a encore essayé de lier FCC, FCS et FCE. Nous espérons que cette recherche aidera les organisations qui déploient des efforts significatifs en marketing pour mettre en œuvre leurs projets, car elle présente un modèle pratique qui peut guider leurs activités vers l’établissement de relations fructueuses entre toutes les parties prenantes, y compris le personnel et les clients. A cette fin, notre article comporte une liste de vérification qui vise à renforcer la cohésion à l’intérieur des organisations marketing axées sur les projets.
The nonlinear fractional relativistic Schrödinger equation: Existence, multiplicity, decay and concentration results
Authors: Ambrosio Vincenzo
Published: June 2021

In this paper we study the following class of fractional relativistic Schrödinger equations:

   \begin{document}$ \begin{equation*} \left\{ \begin{array}{ll} (-\Delta+m^{2})^{s}u + V(\varepsilon x) u = f(u) &\text{ in } \mathbb{R}^{N}, \\ u\in H^{s}( \mathbb{R}^{N}), \quad u>0 &\text{ in } \mathbb{R}^{N}, \end{array} \right. \end{equation*} $\end{document}

where \begin{document}$ \varepsilon >0 $\end{document} is a small parameter, \begin{document}$ s\in (0, 1) $\end{document}, \begin{document}$ m>0 $\end{document}, \begin{document}$ N> 2s $\end{document}, \begin{document}$ (-\Delta+m^{2})^{s} $\end{document} is the fractional relativistic Schrödinger operator, \begin{document}$ V: \mathbb{R}^{N} \rightarrow \mathbb{R} $\end{document} is a continuous potential satisfying a local condition, and \begin{document}$ f: \mathbb{R} \rightarrow \mathbb{R} $\end{document} is a continuous subcritical nonlinearity. By using a variant of the extension method and a penalization technique, we first prove that, for \begin{document}$ \varepsilon >0 $\end{document} small enough, the above problem admits a weak solution \begin{document}$ u_{\varepsilon } $\end{document} which concentrates around a local minimum point of \begin{document}$ V $\end{document} as \begin{document}$ \varepsilon \rightarrow 0 $\end{document}. We also show that \begin{document}$ u_{\varepsilon } $\end{document} has an exponential decay at infinity by constructing a suitable comparison function and by performing some refined estimates. Secondly, by combining the generalized Nehari manifold method and Ljusternik-Schnirelman theory, we relate the number of positive solutions with the topology of the set where the potential \begin{document}$ V $\end{document} attains its minimum value.
EVALUATION OF SMART BOOSTER FANS AND DAMPERS FOR ADVANCED HVAC SYSTEMS
Authors: Rezanejadzanjani Behdad , O’Brien Paul G.
Published: June 2021

There is potential to significantly reduce CO2 emissions by increasing the efficiency and reducing the duty cycle of HVAC systems by using smart booster fans and dampers. Smart booster fans fit in the vents within a home, operating quietly on low power (2W) to augment HVAC systems and improve their performance. In this study, a prototype duct system is used to measure and evaluate the ability for smart booster fans and dampers to control airflow to different vents for the purpose of increasing the efficiency of HVAC systems. Four case studies were evaluated: an HVAC system (1) without any fans or dampers, (2) with a fan installed in one vent, but without any dampers, (3) with dampers installed at the vents, but without any fans, and (4) with both fan and dampers installed. The results from both the experimental and numerical evaluation show that the smart booster fan and dampers can significantly improve the airflow at a vent that is underperforming. For example, the airflow at the last vent in a ducting branch was increased from 17 to 37 CFM when a smart booster fan was installed at this vent. Results from the numerical analysis show that for the case of an underperforming vent during the winter season the HVAC running time may be reduced from 24 hr/day to 5.6 hr/day. Furthermore, results from the numerical analysis show the HVAC running time is further reduced to 4.5 hr/day for cases 3 and 4.