bluuebunny/crossref_metadata_2025 huggingface dataset:
Endüstri 4.0 Dönüşüm Sürecinde, KOBİ’lerin Teknoloji Seviyelerinin Belirlenmesi: Konya İmalat Sanayi Örneği
Authors: YİĞİTOL Büşra , GÜLEŞ Hasan Kürşat , SARI Tuğba
Published: June 2020

İçinde bulunduğumuz çağda, deneyimlediğimiz dijitalleşme süreci, ülkelerin ekonomik sürdürülebilirliklerinin temel unsurlarından biri haline gelmiştir. Bu çerçevede Endüstri 4.0 teknolojilerine uyum, günümüz ve gelecekte işletmelerin sürdürülebilirliklerini belirleyecek kritik faktörlerden biri olarak karşımıza çıkmaktadır. Yeni teknolojilere uyum sağlamada karşılaşılan zorluklar, büyük ölçekli işletmelerin yanı sıra belki de en fazla küçük ölçekli işletmeler için tehdit oluşturmaktadır. Çünkü küçük ve orta ölçekli işletmeler (KOBİ’ler) dijitalleşme altyapısını için gerek duyulan bilgi ve beceri, insan kaynağı, yatırım finansmanı gibi kaynaklara erişmekte daha dezavantajlı konumdadır. Dolayısıyla Türkiye gibi ülke ekonomisinin ve istihdamının büyük çoğunluğunun KOBİ’lere dayandığı gelişmekte olan ülkelerde bu geçiş sürecinin nasıl sağlanacağı önemli bir sorundur. Bu açıdan KOBİ’lerin teknoloji seviyelerinin belirlenmesi, bu yönde ekonomik ve politik yaklaşımların geliştirilmesi açısından önemlidir. Bu çalışmada Konya ili imalat sanayiinde faaliyet gösteren KOBİ’lerin geleneksel bilişim ve imalat teknolojileri ile yeni tanıtılan Endüstri 4.0 teknolojilerini uygulama düzeylerinin belirlenmesi amaçlanmıştır. Böylelikle Endüstri 3.0 teknolojilerinden Endüstri 4.0’a geçişin KOBİ’ler üzerindeki etkisi analiz edilmeye çalışılmıştır. Bu kapsamda Konya merkezinde faaliyet gösteren 185 imalatçı KOBİ ile yapılan görüşmeler sonucunda elde edilen veriler istatistiki açıdan değerlendirilmiştir. Çalışma sonuçlarına göre bölgedeki işletmelerin bilişim ve imalat teknoloji kullanım düzeyleri göreceli olarak olumlu bir düzeyde seyir ederken, aynı işletmelerin Endüstri 4.0 teknolojileri açısından düşük bir uygulama düzeyine sahip oldukları görülmektedir. Ayrıca, örnekleme dahil edilen işletmeler bazı teknolojilerin kullanımı konusunda kendilerini olduklarından daha yetkin görmektedir. Çalışmanın diğer önemli sonuçlarından biri ise, Endüstri 4.0 teknolojilerini uygulama düzeyleri düşük olmasına rağmen işletmelerin bu teknolojileri sektörün ve işletmelerin geleceği açısından önemli yönde atfetmeleridir.
PROPOSAL FOR A NEW MECHANISM OF FINANCING PROTECTION AND RESCUE/CIVIL PROTECTION IN THE REPUBLIC OF SRPSKA
Authors: Jurišić Dragiša , Maksimović Goran , Jovičić Radislav
Published: June 2020

The issue of developing and improving the system of protectionand rescue in the Republic of Srpska is the topic that initiates constantdiscussions, especially after the floods in 2014. One of the most significantissues raised is financing the system of protection and rescue. The aim of thispaper is to propose a new approach and a new model of financing the protectionand rescue system in the Republic of Srpska.The idea is to form the Fundfor protection and rescue that would basically be funded by interbank transactionsin the Republic of Srpska and funds raised from games of chance.
DIFFERENCES BETWEENTHE QUALITY OF DEFENSES AGAINST DIFFERENT TYPES OF ATTACKS PERFORMED FROM THE STATE OF MOTIONLESSNESS AND THOSE ONES PERFOMED IN THE CONDITIONS OF PHYSIOLOGICAL STRESS
Authors: Gužvica Milan , Paspalj Darko , Vulin Lazar
Published: June 2020

Contemporary civilization courses and urgency of situations make the job of aworker of security affairs very stressful, risky and complex, and it requires their completemental and physical fi tness. Accordingly, the teaching process within the course of SpecialPhysical Education also needs to be adjusted, modernised, rationalised and broughtcloser to the realistic life conditions, so the worker of security affairswould be able tomake relevant judgements and decisions in very complicated and dangerous situations. Inthat regard, in this paper we are interested in effectiveness of the defense against differenttypes of attacks in the conditions of motionlessness and in the conditions of physiologicalstress. The research has been carried out at a sample of 25 respondents, consisting of thestudents of the fourth year at the Faculty of Security Science in Banja Luka, aged 23 and24 years (22 male respondents and 3 female respondents). The research has been carriedout after fi nishing the program of the course of Special Physical Education, being studiedduring four semesters. After having carried out the testing, based on the descriptive analysisof the heart rates measured in the morning hours (prior to the daily activities) andthe values measured right before the activities, it can be affi rmed that they have increasedmore than 55%. By the further analysis, the analysis of differences, the existence of statisticallysignifi cant differences in the heart rates and defenses against a variable attackhas been confi rmed, while the existence of statistically signifi cant differences betweenother observed variables has not been confi rmed.
BEZBJEDNOSNA KULTURA U SOCIOLOŠKOM DISKURSU
Authors: Barašin Ostoja , Živojinović Mićo
Published: June 2020

Savremeni globalizacijski procesi su u direktnoj vezi sa različitim izazovima ipovezani su sa mnogobrojnim bezbjednosnim prijetnjama sa kojima sedanas susrećečovječanstvo.Život u zajednici čovjeka stavlja pred stalni izbor-sukob ili saradnja. Globalizacijasa sobom nosiizazove i bezbjednosne prijetnje, kako na globalnom, tako i na regionalnomi lokalnom nivou. Sve izraženija socijalna nejednakost, siromaštvo i nezaposlenost,međudržavni i međureligijski sukobi, terorizam, klimatske promjene i niz drugihindustrijskih rizika i prijetnji sve više utiču na stabilnost planete i povećavaju bezbjednosnerizike do nemjerljivih razmjera. Dolazi do ekspanzije obrazovanja nevjerovatnih razmjerai dinamike, a broj naučnih organizacija i naučnih radnika raste geometrijskomprogresijom. Na taj način obrazovanje izmiče društvenoj kontroli, a mogućnost zloupotrebeznanja, takođe, raste geometrijskom progresijom. Vojna industrija, genetski inženjeringi proizvodnja genetski modifi kovanih organizama, najava ugradnje čipova u tijeloljudi sa podacima o svakom čovjeku uvodi nas brzinom svjetlosti u zonu sumraka.
SOCIOLOGIJA U VREMENU NEVREMENA
Authors: Barašin Ostoja
Published: June 2020

Može se slobodno reći da je malo disciplina koje su toliko izmicalepojmovnom određenju i predmetnom okviru koji bi bio opšteprihvaćen.Višesadržajnost sociologije dovela je do stanja u kome gotovo u svakomudžbeniku ili knjizi, druge karakterne prepoznatljivosti, postoje različitiodređujući okviri njenog predmeta. U svim tim razdobljima i definicijskimtraganjima za određenjem sociologije, razvijao se mučan proces traganjasociologije za sopstvenim naučnim identitetom. Mnoge analize stanja iperspektive sociologije danas pokazuju vidljive znake nepovjerenja, nisugornosti,kao i besperspektivnosti. Ovakvo stanje je posljedica činjeniceda mnogi, izvan discipline, ne shvataju sociologiju ozbiljno i ne pridajujoj zasluženi značaj, a taj problem postaje još dramatičniji kada se uzme uobzir i činjenica da su se te nedoumice uvukle i u redove samih sociloga.Sve izraženija sumnja u sebe šteti sociologiji mnogo više nego sumnja onihkoji ne pripadaju profesiji.
ТУРИЗАМ У ФУНКЦИЈИ РАЗВОЈА Утицај безбједности на развој туризма
Authors: Јовичић Драгомир , Даничић Милан
Published: June 2020

туризам је у великом броју земаља одавно заузеозначајно мјесто као привредна грана, а у неким земљама је у самомврху по обиму средстава која обезбјеђује у буџету. И у Србији упосљедњим деценијама туризам као привредна грана добија све већизначај, што се посебно односи на бањски туризам. Развој туризма сасобом носи и повећан обим запослености у овој области. Да би сетуризам могао развијати потребно је обезбиједити различите ресур-се, као што је путна инфраструктура, кадровска оспособљеност за-послених у области туризма, изградња потребних смјештајних капа-цитета и још много тога. Свакако да би се туризам могао развијатинеопходно је обезбиједити потребан ниво безбједности како у тури-стичким центрима, тако и у цијелој држави. Безбједносна функцијаје иначе једна од најважнијих функција државе, а у савременим ус-ловима је имајући у виду све бројније изворе и облике угрожавањабезбједности, чини се да је у самом врху државних функција по свомзначају. Неке државе у којима је туризам међу главним привред-ним гранама (као што је рецимо Египат) у циљу што већег нивоабезбједности туриста формирају специјализоване безбједносне служ-бе, тзв. Туристичку полицију. Ово је свакако интересантно а чини сеи потребно, пошто је утицај безбједности на развој туризма, а самимтим и на запошљавање у овој привредној грани, од посебне важности.
ARHIV U DOBOJU: 65 GODINA
Authors: MIĆIĆ NEBOJŠA
Published: June 2020

U ovom radu prikazan je istorijat Arhiva u Doboju, koji je osnovan 16. februara 1954. pod nazivom Gradski arhiv Doboj. Tekst prati razvoj Arhiva od njegovog osnivanja, preko ukidanja i uključivanja u Istorijski arhiv Tuzla 1968. godi-ne, njegove obnove u samostalnu ustanovu 1973. i konačne integracije u Arhiv Republike Srpske 1993. U radu su prikazani osnovni podaci o kadrovima, prosto-rijama, smještaju, arhivskoj građi, najvažnijim aktivnostima, kao i teškoćama i izazo-vima nastalim nakon velikih poplava 1965. i 2014.
ИСТОРИОГРАФИЈА НА РАСКРШЋУ – МОГУЋНОСТИ НОВОГ СМЈЕРА У ИСТРАЖИВАЊИМА
Authors: СМИЉАНИЋ АРАНЂЕЛ
Published: June 2020

У овом раду аутор покушава да да одговор на питање да ли је историографија на раскршћу и које су то могућности новог смјера у истражи-вањима. Након нешто дужег увода, аутор прелази на централни и по обиму нај-већи дио рада, у коме указује на квалитет књига и радова савремене историо-графије. Том приликом говори и о занимању шире јавности за резултате савре-меног истраживачког рада. Након тога слиједи дио у коме аутор саопштава анализу свог истраживања локалних монографија које се у посљедње вријеме појављују. Указује на њихове добре стране, али и недостатке и пропусте. Завр-шни дио рада садржи ауторов став о томе ко би требао да пише локалне моно-графије и шта би требало учинити да се њихов квалитет подигне на виши ниво.
ОДНОСИ СРБИЈЕ И САД У ВЕЛИКОМ РАТУ И АМЕРИЧКО ПРИЗНАЊЕ НОВОСТВОРЕНЕ КРАЉЕВИНЕ СХС
Authors: ПЕТРОВИЋ НАДА
Published: June 2020

Развој дипломатских односа између Краљевине Србије и САД у време балканских и Великог рата. Признање владе САД новоформиране државе Краљевине СХС. Први посланик Краљевине СХС у САД др Славко Грујић.
О ГОДИНИ ПОДИЗАЊА СПОМЕНИКА ДР МЛАДЕНУ СТОЈАНОВИЋУ У ПРИЈЕДОРУ
Authors: АДАМОВИЋ ВЕДРАНА
Published: June 2020

Споменик др Младену Стојановићу (1896–1942) налази се непосредно испред зграде Градске управе и рад je једног од највећих српских вајара XX вијека Сретена Стојановића (1898–1960), Младеновог млађег брата. На споменику се нигдје не уочава година подизања, док се у публикацијама наводе различите године, углавном 1952. и 1954. Из садржаја неколико писама датираних на период 1949/50. може се закључити да је овај споменик, свакако, раније завршен и већ 1950. пребачен у Приједор. Неажурност тадашњих надле-жних власти довела је до тога да се откривање споменика морало помјерити са планираног 27. јула на 29. новембар 1950. С обзиром на наведено, примарни задатак рада био је да се прецизно утврди година подизања споменика. Конач-ну потврду навода из писaма употпунио је бањалучки ''Глас'' у краћем чланку од 15. децембра 1950. најављујући тачан датум подизања споменика – 22. децембар 1950. Поменуте околности око подизања споменика омогућавају пот-пуније сагледавање самог догађаја у контексту културе сјећања и памћења, посебно ако се узме у обзир важност лика и дјела др Младена Стојановића.
UTICAJ POPLAVA NA POJAVU DEPRESIJE I RETRAUMATIZACIJU PTSP-A KOD POGOĐENOG STANOVNIŠTVA
Authors: Nikola Mikić
Published: June 2020

Uvod: Ovaj rad istražuje koliki je uticaj poplava na pojavu depresije i retraumatizacijuposttraumatskog stresnog poremećaja kod pogođenog stanovništva. Ubrzo nakonkatastrofalnih situacija najčešće dolazi do poremećaja normalnog psihičkog funkcionisanjačovjeka, a depresija i PTSP su svakako dva najčešća odgovora na takvu situaciju. Cilj ovogistraživanja je da ispita koliko sva ta dešavanja utiču na pojavu depresije i PTSP-a i u kojojmjeri.Metode: Analizirano je 123 ispitanika na području grada Banjaluke i grada Doboja. Njih 86je ispunjavalo Bekovu skalu depresije, a ostatak, njih 37, Skalu uticaja događaja (Impact ofEvents Scale - 15 pitanja). Istraživanje je sprovođeno na teritoriji dva navedena grada uperiodu od 30.10. do 13.11.2014Rezultati: Ukupni rezultati su pokazali da postoji značajan uticaj poplava na pojavu depresijei rettraumatizaciju PTSP-a kod pogođenog stanovništva. Od 86 ispitanika koji su popunjavaliBekovu skalu depresije, njih 28 je imalo neki oblik depresije uzrokovan nedavnimpoplavama. S druge strane, rezultati analize Skale uticaja događaja – koji nam pokazujumoguće prisustvo ili odsustvo PTSP-a kod pogođenog stanovništva – nam pokazuju da, od 37ispitanika, njih 36 je doživjelo neki oblik traume, i događaj je kod njih ostavio značajneposljedice, tako da kod njih možemo govoriti o PTSP-u.Zaključak: Jasno je na koji način katastrofična iskustva mogu uticati na svakodnevni životpogođenih. U ovom slučaju, poplave su dovele do toga da je veći dio ispitanika prošao krozneku vrstu traume koja je kod njih ostavila značajne posljedice, što se manifestovalo pojavomdepresije i retraumatizacijom PTSP-a, a nekada vjerovatno i kombinacijom oba ovaporemećaja.
Evidence of overfishing of geoduck clam Panopea globosa from a length-based stock assessment approach
Authors: Luquin-Covarrubias Marlene A. , Morales-Bojórquez Enrique , García-Borbón Juan A. , Amezcua-Castro Sergio , Pérez-Valencia Sergio A. , Larios-Castro Estefani
Published: June 2020

Stock assessment of the geoduck clam Panopea globosa in Mexico has been based on data-poor without consideration of the biological traits of the species, promoting a passive management strategy without biological reference points for its harvest and conservation, which results in limited advice regarding the sustainability of the fishery. The stock assessment was supported on an integrated catch-at-size assessment model. The model described the population changes, including recruitment, selectivity, fishing mortality, individual growth patterns and survival over time, providing management quantities for the geoduck clam fishery, such as biomass-at-length (total and vulnerable) and harvest rate-at-length. The results indicated overfishing of the geoduck clam population; the harvest rate exceeded the management tactics established for this fishery, even the individuals smaller than the minimum legal size (130 mm) were harvested. Thus, declines in the total biomass (from 3,262 to 1,130 t) and recruitment (representing an 86% decrease) were observed from 2010 to 2012. Although the results showed a recovery trend in recruitment and total biomass from 2014 to 2016, this trend may have been due to the spatial relocation of fishing mortality.
A high-resolution growth series ofTyrannosaurus rexobtained from multiple lines of evidence
Authors: Carr Thomas D.
Published: June 2020

Background

During the growth of complex multicellular organisms, chronological age, size and morphology change together in a hierarchical and coordinated pattern. Among extinct species, the growth ofTyrannosaurus rexhas received repeated attention through quantitative analyses of relative maturity and chronological age. Its growth series shows an extreme transformation from shallow skulls in juveniles to deep skulls in adults along with a reduction in tooth count, and its growth curve shows thatT. rexhad a high growth rate in contrast to its closest relatives. However, separately, these sets of data provide an incomplete picture of the congruence between age, size, and relative maturity in this exemplar species. The goal of this work is to analyze these data sets together using cladistic analysis to produce a single hypothesis of growth that includes all of the relevant data.

Methods

The three axes of growth were analyzed together using cladistic analysis, based on a data set of 1,850 morphological characters and 44 specimens. The analysis was run in TNT v.1.5 under a New Technology search followed by a Traditional search. Correlation tests were run in IBM SPSS Statistics v. 24.0.0.0.

Results

An initial analysis that included all of the specimens recovered 50 multiple most parsimonious ontograms a series of analyses identified 13 wildcard specimens. An analysis run without the wildcard specimens recovered a single most parsimonious tree (i.e., ontogram) of 3,053 steps. The ontogram is composed of 21 growth stages, and all but the first and third are supported by unambiguously optimized synontomorphies.T. rexontogeny can be divided into five discrete growth categories that are diagnosed by chronological age, morphology, and, in part, size (uninformative among adults). The topology shows that the transition from shallow to deep skull shape occurred between 13 and 15 years of age, and the size of the immediate relatives ofT. rexwas exceeded between its 15th and 18th years. Although size and maturity are congruent among juveniles and subadults, congruence is not seen among adults; for example, one of the least mature adults (RSM 2523.8) is also the largest and most massive example of the species. The extreme number of changes at the transition between juveniles and subadults shows that the ontogeny ofT. rexexhibits secondary metamorphosis, analogous to the abrupt ontogenetic changes that are seen at sexual maturity among teleosts. These results provide a point of comparison for testing the congruence between maturity and chronological age, size, and mass, as well as integrating previous work on functional morphology into a rigorous ontogenetic framework. Comparison of the growth series ofT. rexwith those of outgroup taxa clarifies the ontogenetic trends that were inherited from the common ancestor of Archosauriformes.
Susceptibility of Bagged Guavas to the Attack of Fruit Flies (Tephritidae)
Authors: Raga Adalton , Sousa Ester Marques de , Silva Sara Braga e , Louzeiro Léo Rodrigo Ferreira
Published: June 2020

Fruit bagging is an important strategy to protect fruit against fruit fly (Tephritidae) infestation and pesticide contamination. In laboratory, we compared the forced infestation of guavas by Ceratitis capitata (Wiedemann) and Anastrepha fraterculus (Wiedemann) when wrapping them with non- woven fabric (NWF) bags. The combined repellence and protection effects of white, green, blue and red NWF bags were tested in comparison with un-bagged guavas. Bagged fruit with the NWF tissue stuck to the pericarp were separately exposed to both fruit fly species for 48 hours, with a ratio of 10 females per fruit inside of laboratory cages. In C. capitata, the number of pupae per fruit was significantly higher in the green NWF bags, and the infestation in the other colour bags were similar to the control group (non-bagged). In A. fraterculus, guavas with red NWF bags had significantly higher infestation (205.42 pupae per fruit) than fruit that received the other colour bags White and blue bags were less attractive for oviposition from both fruit fly species. The adherence of the NWF bags to the fruit surface causes egg-laying of fruit flies.
Factors Favoring Non-compliance of Treatment to People Living with HIV/AIDS in General Reference Hospital of Gbadolite, Nord Ubangi, Democratic Republic of the Congo
Authors: Seraphin Kohowe Pagerezo , Bongo Gédéon Ngiala , Guy Kumbali Ngambika , Ngbolua Koto-te-Nyiwa
Published: June 2020

Background: ART is one of the important pillars of the fight against AIDS. It restores immunity and reduces the risk of death. Its success lies in its strict compliance while its non-compliance exposes to the risk of resistance and therapeutic failure. The objective of this study was to determine the factors associated with the non-compliance to ART of PLWHA monitored at the General Reference Hospital of Gbadolite.

Methodology: It was an analytical cross-sectional study conducted between December 2017 and January 2018. The compliance was measured from patient reports and by counting the number of tablets remaining from the current month of the survey. Any PLWHA who failed to take their medication at most 2 times during the month preceding the survey or whose number of remaining tablets was greater than the expected number based on the month's consumption was considered non-compliant. In total, 208 participants were selected based on the established selection criteria and several factors which led to the non-compliance of the treatment.

Chi-square and logistic regression were used to determine the associations between factors and the non-compliance. All tests were performed at the threshold of ɑ=0.05.

Results: In fact, 280 PLWHA had participated in the survey. The mean age was 38.7± 7.2 years while the prevalence was 51.1%. Following gender, female accounted as non-compliant (65.7%) than male The main reasons for the non-compliance to treatment were as follows: the order of frequency, medication breakdown, lack of food, forgetting, side effects, travel and fasting. Factors associated with the non-compliance were loneliness in marital status (p=0.000; OR=18.6, CI (8.926 - 38.574)), revival church religion (p=0.002; OR=9.2; CI (2.245 - 37.449)), low level of knowledge of ART principles (p=0.005; OR=1.4; CI (1.169 - 2.735)) and lack of knowledge of ART duration (p=0.021; OR=1.7 and CI (1.020 - 2.829)).

Conclusion: The objective of this study was to determine the factors associated with the non-compliance of ART. The factors found in this work were those that had been found at different levels of association by many authors in previous work, namely marital status, religion, low level of knowledge about ART and lack of knowledge of duration of ART.
Disappointing varenicline results offer important guidance for alcohol research
Authors: Enos Gary
Published: June 2020

While showing disappointing results for the drug varenicline in patients with alcohol use disorder (AUD), a new study offers yet another recent confirmation that results observed in human laboratory analyses reflect participants' everyday behavior outside the lab.
NASADAD pushes block‐grant increase for stimulus 4 bill
Authors: Knopf Alison
Published: June 2020

The National Association of State Alcohol and Drug Abuse Directors (NASADAD) last week wrote to Sen. Patty Murray (D‐ Washington) and Sen. Roy Blunt (R‐Missouri), the Senate co‐chairs of the Labor, Health and Human Services (HHS), Education, and Related Agencies Appropriations Subcommittee, asking specifically for the $1.5 billion in supplemental funding as provided by the House in the HEROES Act for the Substance Abuse Prevention and Treatment (SAPT) block grant (see “Proposed bill for HEROES Act would give $1.5 billion to SAPT block grant,” ADAW, May 18, https://onlinelibrary.wiley.com/doi/10.1002/adaw.32722).
Amino‐Functionalized Al2O3 Particles Coating Separator with Excellent Lithium‐Ion Transport Properties for High‐Power Density Lithium‐Ion Batteries
Authors: Zhang Hui , Sheng Lei , Bai Yaozong , Song Shangjun , Liu Gaojun , Xue Hairong , Wang Tao , Huang Xianli , He Jianping
Published: June 2020

The coating method of Al2O3 nanoparticles has been widely applied to promote the thermostability and wettability of polyolefin separators. However, the untreated Al2O3/polyethylene (PE) composite separators still need to improve the ionic conductivity (σ) and lithium‐ion transference number (tLi+). Herein, a method is found to obtain amino‐functionalized Al2O3 nanoparticles (N‐Al2O3). As a result, the cell with the N‐Al2O3/PE composite separator has improved σ (0.39 mS cm−1) and tLi+ (0.49). The LiCoO2/Li half‐cell based on N‐Al2O3/PE composite separator exhibits higher discharge capacity (125 mAh g−1) and better cycle performance under the current density of 1 C. Furthermore, the cell containing N‐Al2O3/PE composite separator has a better rate performance and the discharge capacity still maintains 75 mAh g−1 at a high rate of 4 C. This method is effective and simple to modify the PE separator with the amino‐functionalized Al2O3 nanoparticles and enhance the high rate performance of Li‐ion batteries.
Cyclic Thermoresistivity of Freestanding and Polymer Embedded Carbon Nanotube Yarns
Authors: Balam Abraham , Cen-Puc Marco , Rodríguez-Uicab Omar , Abot Jandro L. , Avilés Francis
Published: June 2020

Carbon nanotube yarns (CNTYs) are hierarchical fibers with outstanding electrical properties, and understating the temperature‐dependence of their electrical resistance (thermoresistivity) is essential for sensing applications and development of self‐sensing polymer composites. The cyclic thermoresistive response of individual CNTYs and the effect of embedding the yarn into a polymer are experimentally investigated herein. The effect of confining the CNTY by a thermosetting polymer is addressed by studying the thermoresistive response of CNTY/vinyl ester single‐fiber composites. Heating–cooling cycles ranging from 25 (room temperature [RT]) to 100 °C and 25 to −30 °C are applied to individual CNTYs and to CNTYs embedded into a vinyl ester polymer, while their electrical resistance is simultaneously recorded. Both the CNTY and its single‐fiber composite show a negative dependence of electrical resistance with temperature. For both temperature ranges (above and below RT), the average temperature coefficient of resistance found for individual CNTYs is ≈−9.5 × 10−4 K−1, and its magnitude decreases about ≈30% when the yarn is embedded into the vinyl ester polymer. The hysteresis rendered by the different heating and cooling pathways is small for individual CNTYs, and largely increases when the CNTY is embedded into the polymer.
Sandwiched Graphene Clad Laminate: A Binder‐Free Flexible Printed Circuit Board for 5G Antenna Application
Authors: Song Rongguo , Zhao Xin , Wang Zhe , Fu Huaqiang , Han Kunkun , Qian Wei , Wang Suyan , Shen Jie , Mao Boyang , He Daping
Published: June 2020

Metal substitution is always the focus of scientific research in printed circuit board (PCB) and 5G communication technology. It is proved that the high thermal conductive carbon‐based materials can be potential alternatives. However, the relatively low electrical conductivity and the difficulties in integrating carbon‐based materials to functional substrates limit their further and industrial applications. Herein, a method is developed to fabricate large‐scale, binder‐free, flexible graphene clad laminate (GCL) by hot pressing assistant under vacuum to achieve excellent electrical properties and well‐connected interface for PCB application, thus accomplishing metal substitution. GCL is a sandwich structure construct of top and bottom layers of high‐conductivity graphene assembled film as a conductive layer and a dielectric substrate layer. A 5G millimeter wave antenna array based on GCL PCB operated at 26 GHz is designed, fabricated, and characterized. The GCL antenna array has a reflection coefficient of −20.98 dB and a realized gain of 11.05 dBi, which are comparable to the metal antenna array made of the commercial copper clad laminate‐based PCB. All the measurement results show that the flexible and lightweight GCL can be used as a new generation PCB for flexible electronic devices and radio frequency devices.
Switchable Cavitation in Silicone Coatings for Energy‐Saving Cooling and Heating
Authors: Zhao Huaixia , Sun Qiangqiang , Zhou Ji , Deng Xu , Cui Jiaxi
Published: June 2020

Space cooling and heating currently result in huge amounts of energy consumption and various environmental problems. Herein, a switching strategy is described for efficient energy‐saving cooling and heating based on the dynamic cavitation of silicone coatings that can be reversibly and continuously tuned from a highly porous state to a transparent solid. In the porous state, the coatings can achieve efficient solar reflection (93%) and long‐wave infrared emission (94%) to induce a subambient temperature drop of about 5 °C in hot weather (≈35 °C). In the transparent solid state, the coatings allow active sunlight permeation (95%) to induce solar heating to raise the ambient temperature from 10 to 28 °C in cold weather. The coatings are made from commercially available, cheap materials via a facile, environmentally friendly method, and are durable, reversible, and patternable. They can be applied immediately to various existed objects including rigid substrates.
Recent Advances of Applying Boron‐Reagents in Asymmetric Total Syntheses of Natural Products and Bio‐Active Molecules
Authors: Kalita Subarna Jyoti , Cheng Feng , Huang Yi‐Yong
Published: June 2020

Boron‐reagents are very useful tools in synthetic organic chemistry and have been extensively explored in the asymmetric methodology development. The past decade has witnessed an upsurge of interest in exploring their application in the asymmetric total synthesis. Several synthetic strategies, such as the transmetalation strategy, the boronate ligand exchange strategy, the Lewis base and Brønsted acid activation strategies, and the lithiation‐borylation strategy, offered very powerful platforms for the development of innovative synthetic routes for asymmetric total synthesis. This review highlights the progress (2007–2019) of the application of these synthetic strategies in the asymmetric total synthesis of natural products, and of biologically and medicinally relevant molecules.

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Distinctly Diverse PLQY and Inverse Solid‐State Luminescent Properties in Structure‐Similar Diphenyl Sulfone TADF Molecules: A Role of C─C
Authors: Shi Yu‐Hao , Wang Fei , Sui Ming‐Yue , Sun Guang‐Yan , Xie Yu‐Zhong
Published: June 2020

Thermally activated delayed fluorescence (TADF) materials can greatly increase internal quantum efficiencies (IQEs) of organic light‐emitting diodes (OLEDs) beyond the spin statistical bottleneck of 25%. However, the mechanisms behind TADF and solid‐state luminescence are not clear. Recently, two diphenyl sulfone TADF molecules with quite similar structures, A1‐D1 and A2‐D1, have been observed to demonstrate distinctly diverse photoluminescence quantum yield (PLQY) and inverse solid‐state luminescent properties. In order to understand the origin of this phenomenon, the TADF mechanism of both molecules is studied using density function theory. The results show that strong spin–orbit coupling, low minimum energy cross point, dense triplet energy level distribution, and a mediate locally excited triplet state (3LE) can facilitate the rapidly reverse intersystem crossing (RISC) process in A1‐D1. Moreover, the solid states of both molecules are characterized via the combined quantum mechanics and molecular mechanics (QM/MM) method. It is attributed to the compact intermolecular stacking; the nonradiative consumption of A2‐D1 is suppressed substantially by the restricted intermolecular rotation (RIR) effect. Therefore, A2‐D1 with low PLQY can exhibit an aggregation‐induced emission (AIE) phenomenon in neat films. This work may benefit the rational design of nondoped OLEDs.
A Highly Elastic and Fatigue‐Resistant Natural Protein‐Reinforced Hydrogel Electrolyte for Reversible‐Compressible Quasi‐Solid‐State Supercapacitors
Authors: Nan Jingya , Zhang Gaitong , Zhu Tianyu , Wang Zhongkai , Wang Lijun , Wang Hongsheng , Chu Fuxiang , Wang Chunpeng , Tang Chuanbing
Published: June 2020

Compressible solid‐state supercapacitors are emerging as promising power sources for next‐generation flexible electronics with enhanced safety and mechanical integrity. Highly elastic and compressible solid electrolytes are in great demand to achieve reversible compressibility and excellent capacitive stability of these supercapacitor devices. Here, a lithium ion‐conducting hydrogel electrolyte by integrating natural protein nanoparticles into polyacrylamide network is reported. Due to the synergistic effect of natural protein nanoparticles and polyacrylamide chains, the obtained hydrogel shows remarkable elasticity, high compressibility, and fatigue resistance properties. More significantly, the supercapacitor device based on this hydrogel electrolyte exhibits reversible compressibility under multiple cyclic compressions, working well under 80% strain for 1000 compression cycles without sacrificing its capacitive performance. This work offers a promising approach for compressible supercapacitors.
Direct Visualization of the Interfacial Degradation of Cathode Coatings in Solid State Batteries: A Combined Experimental and Computational Study
Authors: Zhang Ya‐Qian , Tian Yaosen , Xiao Yihan , Miara Lincoln J. , Aihara Yuichi , Tsujimura Tomoyuki , Shi Tan , Scott M. C. , Ceder Gerbrand
Published: June 2020

The interfacial instability between a thiophosphate solid electrolyte and oxide cathodes results in rapid capacity fade and has driven the need for cathode coatings. In this work, the stability, evolution, and performance of uncoated, Li2ZrO3‐coated, and Li3B11O18‐coated LiNi0.5Co0.2Mn0.3O2 cathodes are compared using first‐principles computations and electron microscopy characterization. Li3B11O18 is identified as a superior coating that exhibits excellent oxidation/chemical stability, leading to substantially improved performance over cells with Li2ZrO3‐coated or uncoated cathodes. The chemical and structural origin of the different performance is interpreted using different microscopy techniques which enable the direct observation of the phase decomposition of the Li2ZrO3 coating. It is observed that Li is already extracted from the Li2ZrO3 in the first charge, leading to the formation of ZrO2 nanocrystallites with loss of protection of the cathode. After 50 cycles separated (Co, Ni)‐sulfides and Mn‐sulfides can be observed within the Li2ZrO3‐coated material. This work illustrates the severity of the interfacial reactions between a thiophosphate electrolyte and oxide cathode and shows the importance of using coating materials that are absolutely stable at high voltage.
Ultralow Ru Loading Transition Metal Phosphides as High‐Efficient Bifunctional Electrocatalyst for a Solar‐to‐Hydrogen Generation System
Authors: Chen Ding , Pu Zonghua , Lu Ruihu , Ji Pengxia , Wang Pengyan , Zhu Jiawei , Lin Can , Li Hai‐Wen , Zhou Xiangang , Hu Zhiyi , Xia Fanjie , Wu Jingsong , Mu Shichun
Published: June 2020

Water splitting is a promising technology for sustainable conversion of hydrogen energy. The rational design of oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) bifunctional electrocatalysts with superior activity and stability in the same electrolyte is the key to promoting their large‐scale applications. Herein, an ultralow Ru (1.08 wt%) transition metal phosphide on nickel foam (Ru–MnFeP/NF) derived from Prussian blue analogue, that effectively drivies both the OER and the HER in 1 m KOH, is reported. To reach 20 mA cm−2 for OER and 10 mA cm−2 for HER, the Ru–MnFeP/NF electrode only requires overpotentials of 191 and 35 mV, respectively. Such high electrocatalytic activity exceeds most transition metal phosphides for the OER and the HER, and even reaches Pt‐like HER electrocatalytic levels. Accordingly, it significantly accelerates full water splitting at 10 mA cm−2 with 1.470 V, which outperforms that of the integrated RuO2 and Pt/C couple electrode (1.560 V). In addition, the extremely long operational stability (50 h) and the successful demonstration of a solar‐to‐hydrogen generation system through full water splitting provide more flexibility for large‐scale applications of Ru–MnFeP/NF catalysts.
Droplets generation under different flow rates in T‐junction microchannel with a neck
Authors: Pang Yan , Zhou Qiang , Wang Xiang , Lei Yanghao , Ren Yanlin , Li Mengqi , Wang Ju , Liu Zhaomiao
Published: June 2020

The 2D top view of the droplet formation in microfluidic T‐junction devices with a neck is recorded to estimate the droplet volume under different flow conditions. The channel with a neck at the T‐junction, to provide a narrow structure, is proposed but has not been analyzed as the normal T‐junction. The droplet generation process is separated into two stages, including the filling stage and the squeezing stage, to develop a droplet size predictive model based on the continuity of both liquids. In a wide range of flow conditions for multiphase microfluidics, this study validates and physically explains the model by analyzing the generation of droplets and coefficients of the model. Results of this study can help to design droplet microfluidic devices, where it is requisite to know the relation between flow conditions and the droplet size.
Mimicking colorectal cancer due to an intrauterine device
Authors: Shen Chun‐Sheng , Hsieh Meng‐Shu , Wu Deng‐Chyang , Wu Jeng‐Yih
Published: June 2020

Colorectal cancer (CRC) ranked as the third of the top 10 cancers worldwide. Although the diagnostic suspicion of CRC in clinical practice can be increased by the introduction of image‐enhanced endoscopy such as narrow‐band imaging, its diagnosis is still based on the colonoscopic biopsy and pathologic confirmation. Repeated biopsy is necessary in highly suspicious case of CRC with initial negative pathology. We reported a 56‐year‐old woman suffering from bowel habit change, tenesmus, and hematochezia for 3 months. Colonoscopy revealed a lateral spreading nongranular‐type ulcerative mass lesion at rectum that masqueraded a CRC. No malignant cell but inflammatory cells and granulation tissue were found at initial pathologic report. Repeated biopsy was done and disclosed a thin and long white plastic tube buried in sub‐epithelium. Eventually, a T‐shape intrauterine device was fully retrieved. Based on literature review, 24 case reports of intrauterine device penetrating into the colon were identified after the first reported case in 1981. The incidence of uterine penetration is affected by the intrauterine device type, timing of insertion related to pregnancy termination, position of the uterus, insertion technique, and experience of the operator. In summary, we presented the first case report of intrauterine device incarcerated into the colon manifesting as bowel habit changes, tenesmus, and hematochezia in Taiwan.
Rare sex chromosome variation 48,XXYY: An integrative review
Authors: Blumling Amy A. , Martyn Kristy , Talboy Amy , Close Sharron
Published: June 2020

While the most common Sex Chromosome Aneuploidy (SCA) is 47,XXY, other variations, such as 48,XXYY, are less studied, perhaps due to its rarity. 48,XXYY occurs with an estimated prevalence of 1:18,000–40,000 male births. This SCA is associated with a variety of complex physical, psychological, and neuroanatomical findings. The purpose of this integrative review is to summarize the available evidence related to 48,XXYY and identify gaps in the literature. This study utilized integrative review and PRISMA‐guided methodology to search six databases for information pertaining to 48,XXYY. There were no exclusion criteria related to design methodology, given the paucity of available research. Among 397 articles reviewed for potential inclusion, 30 articles remained after inclusion and exclusion criteria were applied. Seven of these articles concentrated solely on participants with 48,XXYY. Literature was summarized into categories of physical phenotype, psychosocial, behavioral, neurocognitive, and brain function. Clinical description of 48,XXYY has evolved over time to develop a deeper understanding of this complex disorder. Large gaps remain, especially a lack of experimental studies, clinical guidelines, and treatments. Additionally, few studies explore methodologies such as interviews or self‐report surveys in this population. 48,XXYY presents with a wide spectrum of physical, psychological, and neurocognitive symptoms, and frequently requires complex interdisciplinary care. In order to better understand this disorder and to appropriately treat the individuals affected by it, future research should focus on experimental studies and research that utilizes a variety of methods, including participant interviews and patient‐report surveys.
Realizing Complete Solid‐Solution Reaction in High Sodium Content P2‐Type Cathode for High‐Performance Sodium‐Ion Batteries
Authors: Jin Ting , Wang Peng‐Fei , Wang Qin‐Chao , Zhu Kunjie , Deng Tao , Zhang Jiaxun , Zhang Wei , Yang Xiao‐Qing , Jiao Lifang , Wang Chunsheng
Published: June 2020

P2‐type layered oxides suffer from an ordered Na+/vacancy arrangement and P2→O2/OP4 phase transitions, leading them to exhibit multiple voltage plateaus upon Na+ extraction/insertion. The deficient sodium in the P2‐type cathode easily induces the bad structural stability at deep desodiation states and limited reversible capacity during Na+ de/insertion. These drawbacks cause poor rate capability and fast capacity decay in most P2‐type layered oxides. To address these challenges, a novel high sodium content (0.85) and plateau‐free P2‐type cathode‐Na0.85Li0.12Ni0.22Mn0.66O2 (P2‐NLNMO) was developed. The complete solid‐solution reaction over a wide voltage range ensures both fast Na+ mobility (10−11 to 10−10 cm2 s−1) and small volume variation (1.7 %). The high sodium content P2‐NLNMO exhibits a higher reversible capacity of 123.4 mA h g−1, superior rate capability of 79.3 mA h g−1 at 20 C, and 85.4 % capacity retention after 500 cycles at 5 C. The sufficient Na and complete solid‐solution reaction are critical to realizing high‐performance P2‐type cathodes for sodium‐ion batteries.
Non‐Lithography Hydrodynamic Printing of Micro/Nanostructures on Curved Surfaces
Authors: Su Meng , Qin Feifei , Zhang Zeying , Chen Bingda , Pan Qi , Huang Zhandong , Cai Zheren , Zhao Zhipeng , Hu Xiaotian , Derome Dominique , Carmeliet Jan , Song Yanlin
Published: June 2020

A key issue of micro/nano devices is how to integrate micro/nanostructures with specified chemical components onto various curved surfaces. Hydrodynamic printing of micro/nanostructures on three‐dimensional curved surfaces is achieved with a strategy that combines template‐induced hydrodynamic printing and self‐assembly of nanoparticles (NPs). Non‐lithography flexible wall‐shaped templates are replicated with microscale features by dicing a trench‐shaped silicon wafer. Arising from the capillary pumped function between the template and curved substrates, NPs in the colloidal suspension self‐assemble into close‐packed micro/nanostructures without a gravity effect. Theoretical analysis with the lattice Boltzmann model reveals the fundamental principles of the hydrodynamic assembly process. Spiral linear structures achieved by two kinds of fluorescent NPs show non‐interfering photoluminescence properties, while the waveguide and photoluminescence are confirmed in 3D curved space. The printed multiconstituent micro/nanostructures with single‐NP resolution may serve as a general platform for optoelectronics beyond flat surfaces.
Iron‐Catalyzed Highly Enantioselective cis‐Dihydroxylation of Trisubstituted Alkenes with Aqueous H2O2
Authors: Wei Jinhu , Wu Liangliang , Wang Hai‐Xu , Zhang Xiting , Tse Chun‐Wai , Zhou Cong‐Ying , Huang Jie‐Sheng , Che Chi‐Ming
Published: June 2020

Reliable methods for enantioselective cis‐dihydroxylation of trisubstituted alkenes are scarce. The iron(II) complex cis‐α‐[FeII(2‐Me2‐BQPN)(OTf)2], which bears a tetradentate N4 ligand (Me2‐BQPN=(R,R)‐N,N′‐dimethyl‐N,N′‐bis(2‐methylquinolin‐8‐yl)‐1,2‐diphenylethane‐1,2‐diamine), was prepared and characterized. With this complex as the catalyst, a broad range of trisubstituted electron‐deficient alkenes were efficiently oxidized to chiral cis‐diols in yields of up to 98 % and up to 99.9 % ee when using hydrogen peroxide (H2O2) as oxidant under mild conditions. Experimental studies (including 18O‐labeling, ESI‐MS, NMR, EPR, and UV/Vis analyses) and DFT calculations were performed to gain mechanistic insight, which suggested possible involvement of a chiral cis‐FeV(O)2 reaction intermediate as an active oxidant. This cis‐[FeII(chiral N4 ligand)]2+/H2O2 method could be a viable green alternative/complement to the existing OsO4‐based methods for asymmetric alkene dihydroxylation reactions.
Gold(I) complexes bearing P‐pyrrole phosphine ligands: Synthesis and catalytic activity towards cycloisomerization of 1,6‐enynes
Authors: Sánchez‐Rodríguez Elvia P. , Cortés‐Mendoza Salvador , Daran Jean‐Claude , Ortega‐Alfaro M. Carmen , López‐Cortés José G. , Gouygou Maryse
Published: June 2020

P‐pyrrole phosphines (R2Ppyr), in which a pyrrole group is directly bonded to the phosphorus atom, act as monodentate k‐P ligands towards gold(I) center to afford either neutral or cationic mononuclear complexes as well as neutral dinuclear complexes. All of these new gold(I) complexes have been structurally characterized and their first uses in catalysis have demonstrated their effectiveness as precatalysts for the enyne cycloisomerization reactions.
High modulus thermoplastic segmented polyurethane/poly(L‐lactide) blends as potential candidates for structural implantable drug delivery systems: I. Structure‐properties relationship study
Authors: Penhasi Adel , Gertler Aharon , Baluashvili Israel , Elzinaty Omar , Shalev Deborah E.
Published: June 2020

Structural polymers with a high modulus of elasticity have the necessary properties for drug eluting implants which are continuously subjected to long‐term loading. The range of polymers that can be used for this purpose is severely limited by the demanding requirements, such as biocompatibility, specific mechanical properties and the capability to control the release rate of incorporated drugs. A new series of blend compositions was developed for these applications, based on a combination of a high modulus thermoplastic segmented polyurethane (TSPU) (shore D hardness) and poly(L‐lactide) (PLLA). The microstructures and properties of these blends were characterized by DSC, tensile tester, FTIR, SEM, WAXD, transmitted light microscopy and elastic recovery testing. The two polymers were found to be immiscible, irrespective of the weight ratio between them, but still compatible, although the compatibility was reduced in blends with equal weight ratios or thereabouts. The dispersed phase in any case spontaneously organized into microspheres embedded within the continuous phase. PLLA could recrystallize as both the dispersed and the continuous phases. The ultimate mechanical properties and the elastic load‐recovery of the blends were largely dependent on the ratio between the polymers. The ability of these blends to create self‐assembled microspheres and the fact that they did not require a compatibilizer or plasticizer point to the potential of these systems to be used for structural implantable drug delivery systems.