bluuebunny/crossref_metadata_2025 huggingface dataset:
Quantifying the barrier for the movement of cyclobis(paraquat-p-phenylene) over the dication of monopyrrolotetrathiafulvalene
Authors: Kristensen Rikke , Neumann Mathias S. , Andersen Sissel S. , Stein Paul C. , Flood Amar H. , Jeppesen Jan O.
Published: January 2022

Two positive charges generated by oxidation of a monopyrrolotetrathiafulvalene unit (green) raise an electrostatic barrier to decrease the speed of the deslipping of a tetracationic ring (blue) that take place in a [2]pseudorotaxane.
Homopolymer nanobowls with a controlled size and denting degree
Authors: Wu Tong , Sun Hui , Jiang Jinhui , Lin Sha , Fan Liujie , Hong Kai , Sun Qingmei , Hu Yong , Zhu Yunqing , Du Jianzhong
Published: January 2022

The homopolymer poly(N-([2,2′-bipyridyl]-4-yl)acrylamide) (PBPy) can self-assemble into nanobowls with a controlled size and denting degree under different conditions.
Effect of H-bonding on network junction and macroscopic elastomer properties in photocured polyacrylate films
Authors: Wu Bing , Chassé Walter , Heise Andreas , Kentgens Arno P. M. , Brougham Dermot F. , Litvinov Victor M.
Published: January 2022

Two series of polyacrylate films with different H-bonding capable monoacrylate copolymers were synthesized by UV-initiated photo-polymerization.
Stretchable, self-healing and adhesive sodium alginate-based composite hydrogels as wearable strain sensors for expansion–contraction motion monitoring
Authors: Zhang Wenshuai , Xu Lingxiao , Zhao Meijin , Ma Yuning , Zheng Ting , Shi Lei
Published: January 2022

A multifunctional sodium alginate-based composite hydrogel was fabricated to serve as a strain sensor for expansion–contraction motion monitoring.
Electromagnetic wave shielding flexible films with near-zero reflection in the 5G frequency band
Authors: Ryu Seung Han , Park Byeongjin , Han You Kyung , Kwon Suk Jin , Kim Taehoon , Lamouri Rachida , Kim Ki Hyeon , Lee Sang-Bok
Published: January 2022

A 5G EMI shielding composite flexible film with near-zero reflection is proposed with remarkably low reflection with thin thickness compared to the previous studies. The resonant frequency can be controlled via tailored design factors of the film.
Technological innovation vs. tightening raw material markets: falling battery costs put at risk
Authors: Mauler Lukas , Lou Xixue , Duffner Fabian , Leker Jens
Published: January 2022

This article sheds light on the combined impact of technological innovation and tightening raw material markets on future battery cost.
Dual-sensitized Eu(iii)/Tb(iii) complexes exhibiting tunable luminescence emission and their application in cellular-imaging
Authors: Zhang Cui , Ma Xiufang , Cen Peipei , Yang Huifang , He Zixin , Guo Yan , Tian Danian , Liu Xiangyu
Published: January 2022

Dual-photosensitized luminescent Eu(iii) and Tb(iii) complexes are capable of exhibiting multiple functionalities of tunable luminescence emission and good cellular-imaging properties.
A global path planning algorithm based on the feature map
Authors: Ren Gongchang , Liu Peng , He Zhou
Published: January 2022

The feature map is a characteristic of high computational efficiency, but it is seldom used in path planning due to its lack of expression of environmental details. To solve this problem, a global path planning algorithm based on the feature map is proposed based on the directionality of line segment features. First, the robot searches the path along the direction of the target position but turns to search in the direction parallel to the obstacle, which it approaches until the line between the robot and the target position does not intersect with obstacles. Then it turns to the target position, keep searching the path. Meanwhile, the problems of the direction selection of turning point, corner point and obstacle circumvention in the searching process are analysed and corresponding solutions are put forth. Finally, a path optimisation algorithm with variable parameters is proposed, making the optimised path shorter and smoother. Simulation experiments demonstrate that the proposed algorithm is superior to A* algorithm in terms of computation time and path length, especially of the computation efficiency.

The cover image is based on the Research Article A global path planning algorithm based on the feature map by Peng Liu et al., https://doi.org/10.1049/csy2.12040.
Generic profile of a long-lived corotating interaction region and associated recurrent Forbush decrease
Authors: Dumbović M. , Vršnak B. , Temmer M. , Heber B. , Kühl P.
Published: January 2022

Context.Corotating interaction regions (CIRs), formed by the interaction of slow solar wind and fast streams that originate from coronal holes (CHs), produce recurrent Forbush decreases, which are short-term depressions in the galactic cosmic ray (GCR) flux.

Aims.Our aim is to prepare a reliable set of CIR measurements to be used as a textbook for modeling efforts. For that purpose, we observe and analyse a long-lived CIR, originating from a single CH, recurring in 27 consecutive Carrington rotations 2057–2083 in the time period from June 2007–May 2009.

Methods.We studied the in situ measurements of this long-lived CIR as well as the corresponding depression in the cosmic ray (CR) count observed by SOHO/EPHIN throughout different rotations. We performed a statistical analysis, as well as the superposed epoch analysis, using relative values of the key parameters: the total magnetic field strength,B, the magnetic field fluctuations,dBrms, plasma flow speed,v, plasma density,n, plasma temperature,T, and the SOHO/EPHIN F-detector particle count, and CR count.

Results.We find that the mirrored CR count-time profile is correlated with that of the flow speed, ranging from moderate to strong correlation, depending on the rotation. In addition, we find that the CR count dip amplitude is correlated to the peak in the magnetic field and flow speed of the CIR. These results are in agreement with previous statistical studies. Finally, using the superposed epoch analysis, we obtain a generic CIR example, which reflects the in situ properties of a typical CIR well.

Conclusions.Our results are better explained based on the combined convection-diffusion approach of the CIR-related GCR modulation. Furthermore, qualitatively, our results do not differ from those based on different CHs samples. This indicates that the change of the physical properties of the recurring CIR from one rotation to another is not qualitatively different from the change of the physical properties of CIRs originating from different CHs. Finally, the obtained generic CIR example, analyzed on the basis of superposed epoch analysis, can be used as a reference for testing future models.
Minapadi productivity with a combination of legowo technology and local fish
Authors: Diana Farah , Mahendra Mahendra , Oktavinanda Giovanni
Published: January 2022

Minapadi is a fish rearing system in rice fields that is carried out with rice plants. This study aims to increase the income of farmers with high productivity of rice yields and increase the production of endemic fish. The method used was a Completely Randomized Design (CRD) experiment with four treatments and 3 replications. PThe treatments are: A1B1 (Legowo 2:1 and giant prawns), A1B2 (legowo 2:1 and fish serukan), A2B1 (legowo 4:1 and giant prawns), and A2B2 (legowo 4:1 and fish serukan). This research was conducted for 90 days in the rice fields of Lango Village, Pante Ceureumen District, West Aceh Regency. Parameters observed were rice productivity, fish growth and business analysis.The results showed that the best treatment was A1B1 (4:1 legowo and giant prawns) with generate value rice productivity average as big as 5 kg/plot, and the average value of the growth of giant prawns is 3.62 g/head and fish serukan is 37.17 g/head. From the results of this study, the application of the Minapadi system with giant prawns and fish with legowo 4:1 gave a positive impact on the observed parameters (P<0.05), annd provide benefits to farmers.
Growth of green mussel (Perna viridis L.) culture at two different depths in estuary waters of Alue Naga Village, Banda Aceh
Authors: Fazriansyah Putra Dedi , Rizqullah Akmal , Waliul Perdana Adli
Published: January 2022

Green mussel (Perna viridis L.) is one of economically valuable shellfish that can be potentially developed to support the people economic income. This study aimed to investigate the growth performance of green mussels at two different groups. Two groups of 15-individual green mussels’ culture was cultured repeatedly forthree times.. The two groups treatment used were 0.9 m depth and on the surface of the water. TThe growth performances were quantified in terms ofweight gain, length gain, daily growth rate, daily length growth rate, specific growth rate, specific length rate. Result showed that green mussels with a depth of 0.9 m and water surface were weight gain, length gain, daily growth rate, daily length growth rate, specific growth rate, specific length rate by values of 10.33±0.43 g, 38.12±2.02 mm, 0.11±0.004 gr/day, 0.39±0.02 mm/day, 1.60±0.11 %/day, and 0.80±0.02 %/day and 8.09±0.21 g, 33.66±0.92 mm, 0.08±0.002 g/day, 0,34±0.01, 1.27±0.03 %/day and 0.74±0.02 %/day, respectively. The growth performance of 0.9 m depth culture were significantly better that water surface culture. Therefore, it is concluded that the 0.9 m of green mussel culture is suggested to obtain the better growth performance.
Ontogeny and morphological development of Tilapia (Oreochromis niloticus) larvae in Aceh Province, Indonesia
Authors: Ismarica Ismarica , Fazriansyah Putra Dedi , Khairina Ulfa
Published: January 2022

Tilapia (Oreochromis niloticus) is one type of fish that has high economic value and is widely consumed by the community. Therefore, the growth and development of tilapia larvae need to be considered. This study aims to determine the growth and development of tilapia larvae. The parameters in this study were observations of total larval length (TL), daily growth rate (LPH), and morphology of tilapia larvae. This research was conducted for 30 days. Measurements of total length growth and morphological development of tilapia larvae were measured on days 1, 5, 10, 15, 20, 25 and 30 DAH (Days After Hatching). Data were analysed descriptively. The results of this study showed that the growth of tilapia larvae from day 1 to day 30 increased. The development of tilapia larvae in the yolk sac phase occurred on day 1-7 and the transition phase (from endogenous feeding to exogenous feeding) occurred on day 6-7 DAH, and on day 8 the yolk sac had been exhausted. The morphological development of tilapia larvae began to form completely on day 10 DAH
Concentration of dissolved heavy metal around the Rupat waters industrial activity, Malacca Strait
Authors: Ondara Koko , Jantama Wisha Ulung , Dhiauddin Ruzana , Purnawan Syahrul
Published: January 2022

The Rupat Strait is a water area located between Rupat Island and Dumai City. This area is growing rapidly which is characterized by increasing coastal residential areas, commercial centers, industries, ports and also increasing marine transportation. This increase in activity can lead to a decrease in the water quality of the Rupat Strait. This study aims to analyze the water quality of heavy metals Cadmium (Cd), Cuprum (Cu), Lead (Pb), Zinc (Zn) and Nickel (Ni) in the waters of the Rupat Strait. Sampling of surface water using sample bottles was carried out at 9 observation stations from the waters of West Rupat to South Rupat, then testing the water samples in the laboratory. The results of the analysis show that the lead and nickel values still meet the threshold values set by the Minister of Environment No.51 of 2014. A total of 30% of the sample points for cadmium testing water do not meet the quality standards and have been polluted. Meanwhile, the values of cuprum and zinc have exceeded the specified quality standards and have polluted the waters of the Rupat Strait. There is a need for a mechanism from various aspects to maintain water quality that still meets the threshold and certain efforts are needed to reduce heavy metal pollution, namely cuprum and zinc in the waters of the Rupat Strait and its surroundings.
Community structure of mangrove in Lambadeuk village, Aceh Besar regency, Indonesia
Authors: Octavina Chitra , Ulfah Maria , Sakinah Rauzatul , Abdul Azis Sayed , Muhammad Razi Nanda , Rizki Fazillah Muhammad , Agustiar Muhammad
Published: January 2022

Mangroves are plants that can live in tidal areas. The study aims to determine the condition of the mangrove ecosystem through a mangrove community structure approach in Lambadeuk Village, Peukan Bada District, Aceh Besar District. This research was conducted in November 2017 using the stratified sampling method. The results showed that there were only 2 types of mangrove species found in Lambadeuk Village, Peukan Bada District, Aceh Besar District, the first is Rhizophora apiculata as many as 36 individuals and the second one is Rhizophora mucronata as many as 116 individuals. The important value index (INP) tree and sapling of Rhizophora apiculata at station 1 and station 3 of 253.655% and station 2 of 183.789%. While seedling of Rhizophora apiculata at station 1 and station 3 of 250.04% and station 2 of 175.02%. The important value index (INP) tree and sapling of Rhizophora mucronata at station 1 and station 3 of 253.655%. While seedling of Rhizophora mucronata at station 1 and station 3 of 250.04%. The diversity (H') obtained is low where H' 2.0, dominance (C) is low where 0 < C 0.5 and evenness (E) is also low where 0 < E 0.5.
Study of determining the fishing season for tiger grouper (Epinephelus fuscoguttatus) landed at Kutaraja Fishing Port, Banda Aceh
Authors: Rahmah Alvi , Sahputri Julyanur , Aprilla Mutia Ratna , Chaliluddin Makwiyah , Elrahimi Afdhal Sayyid
Published: January 2022

The tiger grouper (Epinephelus fuscoguttatus) is a type of fish landed at the Kutaraja Fishing Port using handline. The production of tiger grouper from 2014 to 2019 fluctuated, so it is necessary to determine the right fishing season to make it easier for fishermen to carry out fishing operations for tiger grouper effectively. This research was conducted in July-August 2020, at Kutaraja Fishing Port. The primary data consists fishing trip, location of fishing ground, and total catch, the secondary data (time series data of tiger grouper catches on 2014-2019, as well as research-related literature). The data analysis consists of catch per unit effort (CPUE) analysis and time series analysis using the moving average method. The catch per unit effort (CPUE) of handline at Kutaraja Fishing Port tends to decrease every year. The highest CPUE occurred in 2015 (26.06 kg/trip) and the lowest in 2018 (0.25 kg/trip). The fishing season index of tiger grouper (Epinephelus fuscoguttatus) showed that fish can be caught throughout the year. The results showed that the peak season for tiger grouper landed at Kutaraja Fishing Port occurred in February (201.0%), March (127.2%), June (161.0%), and July (146.1%). Meanwhile, the fishing season index of 50% to <100% includes the moderate season in January (75.0%), August (91.2%) and December (84.3%), and the low season occurs in May (33, 6%), September (31.3%), October (19.9%) and November (41.8%) with the index value less than 50%. In conclusion, the catch per unit effort (CPUE) of tiger grouper (Epinephelus fuscoguttatus) at Kutaraja Fishery Port in 2014-2019 fluctuated but tends to experience a significant decline, where the value ranged from 0.25 kg/trip to 26.06 kg/trip. The peak season for fishing of tiger grouper occurs in February, March, June, and July; moderate season in January, August, and December; and low season occurs in May, September, October, and November.
Social, cultural, economic and mangrove resources Gampong Lapeng, Pulo Breuh, Aceh Besar
Authors: Hanifa Iklila Khansa , Ferdian Rinjani Najmi , Ferdian Rakata Suha , Husein Alamulhuda Agha , Abdurrahman Thariq , Ulfa Maria
Published: January 2022

Socio-cultural and economic a society will be able to help provide information related to the condition of the community. Mangroves are plants that are the result of cultivation activities or taken from nature. This research aims to find out the social, cultural, economic and also mangrove conditions that remain in Gampong Lapeng. In addition, to get to know the preservation of culture and customs in Gampong Lapeng. The benefit of this activity is to provide information and science. This research uses descriptive qualitative methods with a study subject of 5 people. The plot used in this investigation is as much as 1 plot covering an area of 50x50 meters. The results showed that the social conditions of lapeng community are open and friendly in accepting guests who come to visit. A very thick culture in the village of Lapeng is the advice not to go to sea on Fridays. The economic conditions of the villagers depend on the weather and the sea season. In the east wind season the income generated at sea will decrease nominally because fishermen can find fish easily. The types of mangroves in Gampong Lapeng are Rhizophora and Avicennia.
The function of the attitude of Islamic banks in coastal societies in mediating the effect of emotional attachment on the continuance intention of Islamic banks
Authors: Nasir Nasir , Chan Syafruddin , Aprilia Cut
Published: January 2022

This study aims to analyse the factors that cause the reluctance of Islamic bank customers in coastal areas to be loyal to the particular banks. The population in this study are conventional bank customers who live in Aceh, North Sumatra and Riau. The sample size in this study was 350 respondents. Sampling was carried out using a stratified random sampling method with the following proportions: Aceh 25%, North Sumatra 50% and Riau 25%. In this study, the sampling method used the census technique. Data analysis used SEM (Structural Equation Modelling) to verify the path of the relationship between variables. The results showed that of the 3 direct hypotheses tested, the effect of Emotional Attachment on Attitude. The effect of emotional attachment on continuance intention, the effect of Attitude on continuance intention, all of which show a significant effect. The significance that occurs in this direct test indicates that there is a match between the research model developed and the facts in which this research was conducted. On the indirect effect tested, although it showed significant results, the role of attitude in mediating the effect of emotional attachment on continuance intention through attitude is partial.
Alternative kits and worksheets on light and optics as science experimental devices at home for middle school student
Authors: Mardiana Nana , Fitriana Sheila
Published: January 2022

The aims of this research concerned to develop an alternative kits and worksheet on light and optics as science experimental devices at home for middle school student. The method used is a research and development. Alternative kits and worksheet have been tested for feasibility through empirical testing and validation. The research data were analyzed by calculated the index of each indicator instrument experiment. The result showed that science experimental devices is appropriate for home learning activity according to evaluation by a material expert and peer reviewers as well as according to result of middle school students try outs with respective high category.
Profile of rational thinking ability skills and student learning motivation in physics learning
Authors: Fitriana Sheila , Mardiana Nana
Published: January 2022

Based on observations in the field, the learning process of Physics is still teacher-centered and does not provide opportunities for students to build their own knowledge through rational thinking skills. The research aims to describe the profile of rational thinking skills and student motivation. The research method used descriptive research with a single case design for the 32 students of SMPS AL WASHLIYAH 8, who are studying temperature and heat. The technique sampling used accidental sampling or convenience sampling. The results showed that students’ rational thinking skills were still low, aspects of students’ remembering, classifying and evaluating skills were at the highest achievement with percentages of 94%, 95%, and 95% respectively, aspects of generalizing skills were in the medium category with a percentage of 70 %, while the aspect of comparing and analyzing skills is in the very low category with percentages of 30% and 48%, respectively. The student’s learning motivation profile includes the variables of persevering in facing tasks, being tenacious in facing difficulties, showing interest, and independent learning showing results in the medium category. Based on the results of the study, it is necessary to conduct an in-depth experimental study to see the success in improving the rational thinking skills of junior high school students in learning physics.
Community based tourism in Nagari Lawang, West Sumatera: Participation Approach Analysis
Authors: Yuliane Wempie , KM Ukhwatul Vivi , Sholeh Moh.
Published: January 2022

Community-Based Tourism (CBT) is one of the emerging tourism models in the last few decades as an alternative to mass tourism in all over the world. This can be categorized as sustainable tourism because it includes local people participation, and conservation. Lawang Village (known as Nagari Lawang) is one of the village in the West Sumatera Indonesia that has been trying CBT since 2012 with rich potential tourisms: culture, nature, adventure, traditional culinary, and handycraft. However, this is not as easy for CBT conducted sucessfully benefiting stakeholders because of two major dominated private-owned tourism objects. Initally the CBT was promoted and initiated by one of the owner of private tourism, now it is just has lost its power and continuity and faced problems such as lack of human resources, loss global promotion, and finally the collaps of many homestays that have been designed before. However some local economic activities like traditional beverage production called “tebu lawang” and traditional gift shop are still running well. The purposes of this study are to find the community participation level in CBT Lawang and to determine the proper policy to recover CBT’s profitable business. To achieve the study purposes this research used qualitative research design through Focus Group Disucssion and SWOT Analysis. Primary data were collected through observation, interview, and focus group discussion (FGD). The study results shows that based on Arnstein Participation Theory, CBT Lawang lies on the second step of participation where local people support tourism but has no access to resolve problems. Based on the SWOT analysis, the local government rules needed to regulate private tourism object in order to evade competition and to strengthen cooperation with CBT.
Digitale Weiterbildung – Herausforderung in der aktuellen Situation
Authors: Blätzinger Markus
Published: January 2022

Digitales Lernen und digitale Fort- und Weiterbildung sind nicht erst seit den aktuellen Coronamaßnahmen ein Thema in der Medizin. Dieser Artikel möchte einen kurzen Überblick über
Techniken und Konzepte geben, diese grob einordnen und dazu ermutigen, neue digitale Wege in der Fort- und Weiterbildung auch im operativen Bereich der Medizin anzugehen, ohne die Nachteile
und Grenzen dieser Technologien zu ignorieren.
Alarmierung zum Einsatzstichwort Seuchenverdacht in einer Großstadt: schwerer Verlauf einer Malaria tropica
Authors: Breuer Florian , Pfäfflin Frieder , Poloczek Stefan , Pommerenke Christopher , Spielmann Eiko , Dahmen Janosch
Published: January 2022

Rettungswagen und Notarzteinsatzfahrzeug werden zu einer Reanimationssituation alarmiert, bei der es zum Versterben eines männlichen Patienten kommt. Dieser hat zuvor über unspezifische
grippale Symptomatik und ausgeprägte Diarrhöen geklagt sowie febrile Temperaturen entwickelt. Gemeinsam mit der Ehefrau befand er sich zuvor auf einer Reise in Togo. Aufgrund von ähnlichen
Symptomen kommt es am Folgetag zu einem Einsatz bei der Ehefrau, wodurch zunächst der Verdacht auf eine High Consequence infectious Disease (HCID) bestand, im Verlauf jedoch eine Malaria
wahrscheinlich erschien. Unter Einbeziehung von öffentlichem Gesundheitsdienst und einer Schwerpunktklinik wurde die Transportstrategie festgelegt. Während des stationären Aufenthaltes wurde
eine Malaria tropica diagnostiziert, eine Prophylaxe erfolgte vor Reiseantritt nicht.
Resident and Fellow Participation Does Not Affect Short-Term Postoperative Complications After Distal Radius Fracture Fixation
Authors: Gordon Adam M. , Ashraf Asad M. , Magruder Matthew L. , Conway Charles A. , Sheth Bhavya K. , Choueka Jack
Published: January 2022

Background Complications after open reduction internal fixation (ORIF) for distal radius fractures (DRF) are well documented, but the impact of trainee involvement on postoperative outcomes has not been studied.

Questions Does trainee involvement affect postoperative complication rates and length of hospital stay?

Methods The American College of Surgeons National Surgical Quality Improvement Program was queried from 2006 to 2012 for patients undergoing DRF ORIF. A 1:1 propensity score matched resident/fellow involved cases to attending-only cases. Demographics, length of stay, and postoperative complications were compared between the two groups. Logistic regression was used to evaluate independent predictors of adverse events and to evaluate cases with and without trainee involvement.

Results Overall, 3,003 patients underwent DRF ORIF from 2006 to 2012. After matching, 1,150 cases (50% with resident/fellow involvement) were included. The overall rate of adverse events was 4.4% (46/1,050). There were no significant differences in the short-term complication rate in trainee-involved (2.3%) versus attending-only cases (3.9%) (p = 0.461). For ORIF of DRF, there were no significant differences, between attending-only cases and resident/fellow-involved cases, with regard to short-term major complications (p = 0.720) or minor complications (p = 0.374). Length of hospital stay was similar between cohorts (1.22 vs. 0.98 days) (p = 0.723). On multivariate analysis, trainee involvement was not an independent predictor of minor, major, or any complication after DRF fixation after controlling for multiple independent factors (all p > 0.364).

Discussion Trainee participation in DRF ORIF is not associated with increased risk of short-term (30 days) medical or surgical postoperative complications.

Level of Evidence This is a Level IV case–control study.
A Great Divide: Polish media discourse on migration, 2015–2018
Authors: Troszyński Marek , El-Ghamari Magdalena
Published: January 2022

The widely described migration crisis in Europe took place in 2015–2018. Like any major event, it was covered by the media in a variety of ways. While one could find analyses of the related media content for many European countries, a comprehensive study for Poland has not been previously conducted. This paper describes the Polish media’s divided positions on migration from 2015 to 2018. The media content analysis was based on the monitoring of the press, television, and the Internet. The following research techniques were used: (1) a summary of the number of messages over particular months to show the intensity of the phenomenon, (2) quantitative analysis employing corpus linguistics (CL), (3) qualitative analysis using critical discourse analysis (CDA). The analyses revealed a sharp divide between conservative and liberal discourses. These differences—tone, sentiment, and subject matter—were apparent in how the migration crisis was described. Conservative media only showed negative aspects of migration, and if there were no such issues in Poland, protests against migrants in Europe became their chosen topic. Liberal media much more often referred to the specificity of migration to Poland (economic migration from Ukraine) and showed the need for solidarity with migrants. However, the dominant difference was the political sympathies of individual media. We have shown divisions in media coverage based on this very factor. Tabloid coverage was not associated with any political party; it criticized the actions of the government and the opposition. However, the most critical perspective from which we want to describe the collected material is the securitization of migration. The subject of security is present in each analysed discourse, regardless of political divisions. Our research shows though that the intensity of threats is more significant in the right-wing press.
Quasi-periodical kinetic instabilities in minimum-B confined plasma
Authors: Bhaskar B. S. , Koivisto H. , Tarvainen O. , Thuillier T. , Toivanen V.
Published: January 2022

We present the results of an experimental investigation of quasi-periodical kinetic instabilities exhibited by magnetically confined electron cyclotron resonance heated plasmas. The instabilities were detected by measuring plasma microwave emission, electron losses, and wall bremsstrahlung. The instabilities were found to be grouped into fast sequences of periodic plasma losses, separated by ∼100 µs between the bursts, followed by 1–10 ms quiescent periods before the next event. Increasing the plasma energy content by adjusting the plasma heating parameters, in particular the magnetic field strength, makes the instabilities more chaotic in the time domain. Statistical analysis reveals that the energy released in a single instability event depends on the magnetic field strength and microwave power but not on the neutral gas pressure. The effects of these ion source parameters on the instability characteristics are explained qualitatively by considering their influence on the electron energy distribution. A correlation is found between the energy dissipated in an instability event and the recovery time of the periodic bursts, i.e., a large amplitude instability leads to a long recovery time of the electron energy distribution.
Quintic-scaling rank-reduced coupled cluster theory with single and double excitations
Authors: Lesiuk Michał
Published: January 2022

We consider the rank-reduced coupled-cluster theory with single and double (RR-CCSD) excitations introduced recently [Parrish et al., J. Chem. Phys. 150, 164118 (2019)]. The main feature of this method is the decomposed form of doubly excited amplitudes, which are expanded in the basis of largest magnitude eigenvectors of MP2 or MP3 amplitudes. This approach enables a substantial compression of amplitudes with only minor loss of accuracy. However, the formal scaling of the computational costs with the system size (N) is unaffected in comparison with the conventional CCSD theory (∝N6) due to the presence of some terms quadratic in amplitudes, which do not naturally factorize to a simpler form even within the rank-reduced framework. We show how to solve this problem, exploiting the fact that their effective rank increases only linearly with the system size. We provide a systematic way to approximate the problematic terms using the singular value decomposition and reduce the scaling of the RR-CCSD iterations down to the level of N5. This is combined with an iterative method of finding dominant eigenpairs of MP2 or MP3 amplitudes, which eliminates the necessity to perform the complete diagonalization, making the cost of this step proportional to the fifth power of the system size, as well. Next, we consider the evaluation of perturbative corrections to CCSD energies resulting from triply excited configurations. The triply excited amplitudes present in the CCSD(T) method are decomposed to the Tucker-3 format using the higher-order orthogonal iteration procedure. This enables us to compute the energy correction due to triple excitations non-iteratively with N6 cost. The accuracy of the resulting rank-reduced CCSD(T) method is studied for both total and relative correlation energies of a diverse set of molecules. Accuracy levels better than 99.9% can be achieved with a substantial reduction of the computational costs. Concerning the computational timings, the break-even point between the rank-reduced and conventional CCSD implementations occurs for systems with about 30–40 active electrons.
Functionally graded (FG) magneto-photo-thermoelastic semiconductor material with hyperbolic two-temperature theory
Authors: Saeed Abdulkafi M. , Lotfy Kh. , El-Bary A. , Ahmed M. H.
Published: January 2022

In this paper, a one-dimensional elastic–electronic deformation problem under the influence of the magnetic field will be inspected. Furthermore, the non-homogeneous (functionally graded) properties of semiconductor materials in the context of the photo-thermoelasticity theory will be studied. The hyperbolic two-temperature theory is taken into consideration during the photo-excited transport process. The interactions among the thermal, plasma, and elastic waves are analytically obtained when the optical and elastic parameters of the semiconductor medium are utilized as a function in the distance. The governing equations are formed using the Laplace transform technique to identify the analytical solutions of the key physical field distributions in the Laplace domain. Some thermal load, mechanical force, and plasma recombination conditions can be implemented at the free surface of the semiconductor medium. To illustrate the importance and effectiveness of the obtained results, the complete solutions of the main physical quantities in the space–time domain are identified using a numerical technique based on the inverse of the Laplace transform. Moreover, this work demonstrates the main physical field quantities that will be graphically represented and theoretically discussed. Many comparisons are made according to the influence of some parameters when thermal memories are taken into consideration.
Compatibility of eco-friendly insulating medium C6F12O and sealing material NBR
Authors: Rao Xiajin , Zhu Liping , Zhang Xiaoxing , Li Dajian , Han Fangyuan , Peng Boya , Yu Changting , Zhang Lei , Su Yi , Lu Yufeng , Ma Shouxiao , Li Rui
Published: January 2022

The eco-friendly insulating medium C6F12O has good insulation properties, and it has the prospect to be used in medium and low voltage switchgear. The compatibility between C6F12O and the sealing material commonly used in gas-insulated equipment [nitrile butadiene rubber (NBR)] needs to be studied before C6F12O could be put into practical use. In this paper, the compatibility test between NBR and C6F12O is carried out. Scanning electron microscopy and x-ray photoelectron spectroscopy are used to detect the surface morphology and element changes in NBR before and after the test. At the same time, the interaction between C6F12O and NBR is simulated based on molecular dynamics, and the solubility parameters, diffusion coefficient, and radial distribution function are calculated. The test results show that the NBR surface is damaged by C6F12O for a long time and a large number of raised cracks and F elements appear on the NBR surface. At the same time, the calculation results show that the solubility parameter of SF6 and C6F12O is 18.730 and 14.267 (J/cm3)1/2, respectively. The diffusion coefficient of C6F12O in NBR (13.500 × 10−7 cm2/s) is higher than that of SF6 (10.333 × 10−7 cm2/s), which reveals that C6F12O is easier to diffuse in NBR. Both C6F12O/NBR and SF6/NBR have hydrogen bonding force, but the interaction between C6F12O and NBR is stronger than that of SF6. These results can provide theoretical and technical reference for the material selection and design of C6F12O gas insulated equipment.
Strength softening mitigation in bimodal structured metals
Authors: Wang Han , Cao Penghui
Published: January 2022

Polycrystalline metals become stronger with a decrease in the constitute grain size, yet strength softening takes over at the nanometer regime. Here, we find that this softening rate can be tailored and mitigated by tuning structural heterogeneity and grain size uniformity. With reducing the small grain size in bimodal structures, the strength reduction is markedly alleviated due to the enhanced strengthening of large grains. This mitigation of strength softening is mediated by promoted intragranular slip, extra dislocation storage, and reduced grain boundary sliding in bimodal structures. Our findings signifying the role of grain size non-uniformity on crystal plasticity shed light on a broad class of heterogeneous structured materials with improved strength and ductility.
A high precision phase measurement system implemented in FPGA with phase interpolator
Authors: Chen K. , Song X. , Yu Z. , Liu J.
Published: January 2022

High precision timing distribution is crucial to many large scale cosmology and particle physics experiments. Besides the space and energy information, the accurate timing provides an extra dimension for physics event reconstruction. In the timing distribution system, accurate clock phase measurement is an indispensable tool to monitor the phase drift and to achieve accurate phase adjustment. This paper introduces a novel phase measurement method implemented in the Xilinx Field Programmable Gate Array (FPGA). It uses the dedicated phase interpolator in the multi-gigabit transceiver. A design based on this method is implemented within the Kintex Ultrascale series FPGA. The preliminary test result shows that a sub-picosecond level precision is achieved. With this system, the nonlinearity of the phase adjustment in the Xilinx transceiver is measured.
Terminal velocities and vortex dynamics of weakly compressible Rayleigh–Taylor Instability
Authors: Zhou Youlizi , Zou Shufan , Pu Yudong , Xue Quanxi , Liu Hao
Published: January 2022

The evolution of Rayleigh–Taylor instability (RTI) for weakly compressible fluids was numerically simulated using the smooth particle hydrodynamics method. It was found that the speed of spikes and bubbles in most cases will reach a stable value, which is called terminal speed. The calculated terminal speed of the bubble was found to be systematically higher than the theoretical model based on the potential flow hypothesis. This deviation could be modified by including the vortex effect on the terminal speed of the bubble. A significant correlation between the bubble speed and the vorticity in the bubble head was found during the whole evolution of RTI. The analysis of the vortex dynamics in the bubble head region during the terminal speed stage shows that there is a balance between the baroclinic production, viscous dissipation, and convective transport of the vorticity.
Quantum delegated computing ciphertext retrieval scheme
Authors: Liu Zhixin , Xie Qiaoling , Zha Yongfu , Dong Yumin
Published: January 2022

Quantum physics has some unique properties, such as quantum entanglement and quantum superposition. Encryption algorithms designed based on quantum physical properties usually have higher security than classical computing. Applying quantum cryptography to data retrieval can realize cloud database encryption of quantum information. We propose a cloud ciphertext retrieval scheme, which combines quantum encryption and quantum search algorithm to ensure the privacy of data while the server completes information retrieval. In this scheme, the data are stored in the form of qubits string and placed in the quantum superposition state. We establish the mapping relationship between classical information and quantum states. Our scheme solves the problem of a large amount of computing and lack of sufficient computing resources at the client, assigns computing tasks to servers with sufficient resources, and ensures the security of information.
Broadband spatial polarization processing of light via a photopatterned dichroic medium
Authors: Fan Xing-Yu , Ma Wen-Yang , Zhang You-Ming , Xu Chun-Ting , Ren Hui , Han Wen-Ming , Chen Chao-Yuan , Hu Wei
Published: January 2022

Vector beams, featured by a specific space-variant distribution of polarization, have attracted intensive attention. Arbitrary and broadband spatial polarization processing is a key pursuit for vector beam generation, modulation, and detection. Here, we introduce black dye into liquid crystals to form a dichroic medium and imprint high-resolution patterns into the medium via photopatterning. Continuous cylindrical and binary vector beams are freely generated. Switching between a vector beam generator and a high-transmittance homeotropic state can be realized due to the electro-optical tunability of liquid crystals. On the basis of a radial vector beam generator array, the polarization distribution is characterized by calculating the darkest line of each generator. This strategy provides a platform for arbitrary spatial polarization processing and may bring more possibilities for polarization imaging, structured light generation, and materials characterization.
Multitarget nociceptor sensitization by a promiscuous peptide from the venom of the King Baboon spider
Authors: Finol-Urdaneta Rocio K. , Ziegman Rebekah , Dekan Zoltan , McArthur Jeffrey R. , Heitmann Stewart , Luna-Ramirez Karen , Tae Han-Shen , Mueller Alexander , Starobova Hana , Chin Yanni K.-Y. , Wingerd Joshua S. , Undheim Eivind A. B. , Cristofori-Armstrong Ben , Hill Adam P. , Herzig Volker , King Glenn F. , Vetter Irina , Rash Lachlan D. , Adams David J. , Alewood Paul F.
Published: January 2022

Significance

Pain development and discomfort are universal features of spider envenomation, yet severe pain arising from bites by Old World spiders is poorly understood. Molecular analyses of the venom of the King Baboon spider revealed abundant expression of the inhibitory cystine knot peptide Pm1a. Synthetic Pm1a induces pain in mice while simultaneously enhancing proexcitatory sodium currents and decreasing inhibitory potassium currents. These concomitant effects promote hyperexcitability in pain-sensing neurons that can be reversed by pharmacological inhibition of voltage-gated sodium channels. The coordinated modulation of excitatory and inhibitory ion channels involved in pain propagation may represent an economical and effective defense strategy in pain-inducing defensive venoms.
The role of job insecurity in emotional exhaustion and work engagement during the COVID-19 pandemic: the moderating effect of organizational reward and care policies (El papel de la inseguridad laboral en el agotamiento emocional y el compromiso laboral durante la pandemia de la COVID-19: el efecto moderador de la recompensa organizacional y las políticas de cuidado)
Authors: Tsai Hung-Yu
Published: January 2022

This study developed and tested a moderation model to investigate the effects of job insecurity due to the coronavirus disease of 2019 (COVID-19). We hypothesized that reward and care policies can moderate the relationship between job insecurity due to COVID-19 and employee outcomes (i.e., emotional exhaustion and work engagement). Two-wave data were collected from 344 worker–manager pairs in China, demonstrating that job insecurity negatively affects work engagement. Conversely, job insecurity had a significant positive effect on emotional exhaustion. Another finding was that the reward policy was less negatively related to job insecurity due to COVID-19 than employees’ work engagement. Moreover, care policy was related less positively to job insecurity due to COVID-19 than to employees’ emotional exhaustion.
Metal loaded nano-carbon gas sensor array for pollutant detection
*
Authors: Behi Syrine , Casanova-Chafer Juan , González Ernesto , Bohli Nadra , Llobet Eduard , Abdelghani Adnane
Published: January 2022

Many research works report a sensitive detection of a wide variety of gas species. However, their in-lab detection is usually performed by using single gases and, therefore, selectivity often remains an unsolved issue. This paper reports a four-sensor array employing different nano-carbon sensitive layers (bare graphene, SnO2@Graphene, WO3@Graphene, and Au@CNTs). The different gas-sensitive films were characterised via several techniques such as FESEM, TEM, and Raman. First, an extensive study was performed to detect isolated NO2, CO2, and NH3 molecules, unravelling the sensing mechanism at the operating temperatures applied. Besides, the effect of the ambient moisture was also evaluated. Afterwards, a model for target gas identification and concentration prediction was developed. Indeed, the sensor array was used in mixtures of NO2 and CO2 for studying the cross-sensitivity and developing a calibration model. As a result, the NO2 detection with different background levels of CO2 was achieved with an R
2 of 0.987 and an RMSE of about 22 ppb.
On the stability of solitary wave solutions for a generalized fractional Benjamin–Bona–Mahony equation
Authors: Oruc Goksu , Natali Fábio , Borluk Handan , Muslu Gulcin M
Published: January 2022

In this paper we establish a rigorous spectral stability analysis for solitary waves associated to a generalized fractional Benjamin–Bona–Mahony type equation. Besides the well known smooth and positive solitary wave with large wave speed, we present the existence of smooth negative solitary waves having small wave speed. The spectral stability is then determined by analysing the behaviour of the associated linearized operator around the wave restricted to the orthogonal of the tangent space related to the momentum at the solitary wave. Since the analytical solution is not known, we generate the negative solitary waves numerically by using Petviashvili method. We also present some numerical experiments to observe the stability properties of solitary waves for various values of the order of nonlinearity and fractional derivative. Some remarks concerning the orbital stability are also celebrated.
Diastolic function: modeling left ventricular untwisting as a damped harmonic oscillator
Authors: Gamble Forrest N , Aufan M Rifqi , Sharifov Oleg F , Williams Lamario J , Reighard Shane , Calhoun David A , Gupta Himanshu , Dell’Italia Louis J , Denney Thomas S , Lloyd Steven G
Published: January 2022

Objective. We developed a method using cardiovascular magnetic resonance imaging to model the untwisting of the left ventricle (LV) as a damped torsional harmonic oscillator to estimate shear modulus (intrinsic myocardial stiffness) and frictional damping, then applied this method to evaluate the torsional stiffness of patients with resistant hypertension (RHTN) compared to a control group. Approach. The angular displacement of the LV during diastole was measured. Myocardial shear modulus and damping constant were determined by solving a system of equations modeling the diastolic untwisting as a damped, unforced harmonic oscillator, in 100 subjects with RHTN and 36 control subjects. Main Results. Though overall torsional stiffness was increased in RHTN (41.7 (27.1–60.7) versus 29.6 (17.3–35.7) kdyn*cm; p = 0.001), myocardial shear modulus was not different between RHTN and control subjects (0.34 (0.23–0.50) versus 0.33 (0.22–0.46) kPa; p = 0.758). RHTN demonstrated an increase in overall diastolic frictional damping (6.13 ± 3.77 versus 3.35 ± 1.70 kdyn*cm*s; p < 0.001), but no difference in damping when corrected for the overlap factor (74.3 ± 25.9 versus 68.0 ± 24.0 dyn*s/cm3; p = 0.201). There was an increase in the polar moment (geometric component of stiffness; 11.47 ± 6.95 versus 7.58 ± 3.28 cm4; p <0.001). Significance. We have developed a phenomenological method, estimating the intrinsic stiffness and relaxation properties of the LV based on restorative diastolic untwisting. This model finds increased overall stiffness in RHTN and points to hypertrophy, rather than tissue- level changes, as the major factor leading to increased stiffness.