bluuebunny/crossref_metadata_2025 huggingface dataset:
Optical vortex beam controlling based on fork grating stored in a dye-doped liquid crystal cell
Authors: Soleimani P. , Khoshsima H. , Yeganeh M.
Published: December 2022

In this paper, we investigate the generation and controlling of the optical vortex beam using a dye-doped liquid crystal (DDLC) cell. The spatial distribution of the quasi-sinusoidal orientation of the liquid crystal molecules creates a quasi-sinusoidal phase grating (PG) in the DDLC cell. Depending on the incident light pattern, Trans to Cis photoisomerization of the dye molecules affects the orientation of the liquid crystal molecules. To do so, an amplitude fork grating (FG) is used as a mask, and its pattern is stored in the cell by a pattern printing method as the PG. One of the particular features of the stored grating in the cell is its capability in the diffraction efficiency controlled by the applied electric field. The results show, based on the central defect in the FG pattern, the diffracted probe beam in different orders is optical vortices. As a new technique, this type of stored pattern acts like an amplitude grating but according to the results, its structure is in fact a PG. This technique leads to the vortex beam switching capability by applying an electric field to the cell. The results show that by applying 22 V, all the diffraction orders vanish. Meanwhile, the vortex beams reappear by removing the applied voltage. The diffraction efficiency of the vortex beams as well as its generation dependency on the polarization of the incident beam studied. The maximum efficiency of the first diffraction order for linear polarized incident beam was obtained at 0 V, about 8%. Based on the presented theory, a simulation has been done which shows the Cis form of the dye molecules has been able to change the angle of LC molecules on average about 12.7°. The study of diffracted beam profiles proves that they are electrically controllable vortex beams.
Aeromonas sobria as a potential candidate for bioremediation of heavy metal from contaminated environments
Authors: Qurbani Karzan , Khdir Karokh , Sidiq Avin , Hamzah Haider , Hussein Safin , Hamad Zhilia , Abdulla Rayan , Abdulla Banw , Azizi Zahra
Published: December 2022

The uncontrolled discharge of industrial wastes causes the accumulation of high heavy metal concentrations in soil and water, leading to many health issues. In the present study, a Gram-negative Aeromonas sobria was isolated from heavily contaminated soil in the Tanjaro area, southwest of Sulaymaniyah city in the Kurdistan Region of Iraq; then, we assessed its ability to uptake heavy metals. A. sobria was molecularly identified based on the partial amplification of 16S rRNA using novel primers. The sequence was aligned with 33 strains to analyze phylogenetic relationships by maximum likelihood. Based on maximum tolerance concentration (MTC), A. sobria could withstand Zn, Cu, and Ni at concentrations of 5, 6, and 8 mM, respectively. ICP-OES data confirmed that A. sobria reduced 54.89% (0.549 mM) of the Cu, 62.33% (0.623 mM) of the Ni, and 36.41% (0.364 mM) of the Zn after 72 h in the culture medium. Transmission electron microscopy (TEM) showed that A. sobria accumulated both Cu and Ni, whereas biosorption was suggested for the Zn. These findings suggest that metal-resistant A. sobria could be a promising candidate for heavy metal bioremediation in polluted areas. However, more broadly, research is required to assess the feasibility of exploiting A. sobria in situ.
Inducing a mental context for associative memory formation with real-time fMRI neurofeedback
Authors: Collin Silvy H. P. , van den Broek Philip L. C. , van Mourik Tim , Desain Peter , Doeller Christian F.
Published: December 2022

Memory, one of the hallmarks of human cognition, can be modified when humans voluntarily modulate neural population activity using neurofeedback. However, it is currently unknown whether neurofeedback can influence the integration of memories, and whether memory is facilitated or impaired after such neural perturbation. In this study, participants memorized objects while we provided them with abstract neurofeedback based on their brain activity patterns in the ventral visual stream. This neurofeedback created an implicit face or house context in the brain while memorizing the objects. The results revealed that participants created associations between each memorized object and its implicit context solely due to the neurofeedback manipulation. Our findings shed light onto how memory formation can be influenced by synthetic memory tags with neurofeedback and advance our understanding of mnemonic processing.
A frontal air intake may improve the natural ventilation in urban buses
Authors: Alexei Pichardo-Orta F. , Luna Oscar Adrián Patiño , Cordero J. Rodrigo Vélez
Published: December 2022

In this report we analyze the air flow across the open windows (natural ventilation) of an urban bus model and the consequent dispersion of aerosols emitted in the passengers area. The methods include computational fluid dynamics simulations and three ways to characterize the dispersion of passive tracers: a continuous concentration-based model, a discrete random model and a parametric scalar based on the so-called mean age of air. We also conducted experiments using a 1:10 scale bus model and $$\text{CO}_{2}$$

CO
2

as a passive tracer to assess the ventilation characteristics. We found that dispersion and expulsion of aerosols is driven by a negative pressure in the standard bus design equipped with lateral windows. Also, the average age of air is 6 minutes while the air flow promotes aerosol accumulation to the front (driver’s area). To speed up the expulsion of aerosols and reduce their in-cabin accumulation, we propose a bus bodywork prototype having a frontal air intake. All the numerical models and experiments conducted in this work agreed that the expulsion of aerosols in this novel configuration is significantly increased while the average age of air is reduced to 50 seconds. The average air flow also changes with the presence of frontal air intakes and, as a consequence, the expulsion of aerosols is now driven by a frontal velocity field.
Relationship between running performance and weather in elite marathoners competing in the New York City Marathon
Authors: Weiss Katja , Valero David , Villiger Elias , Thuany Mabliny , Cuk Ivan , Scheer Volker , Knechtle Beat
Published: December 2022

It is well known that weather and pacing have an influence on elite marathon performance. However, there is limited knowledge about the effect of weather on running speed in elite marathoners. The aim of the present cross-sectional study was to investigate potential associations between running speed and weather variables in elite runners competing in the ‘New York City Marathon’ between 1999 and 2019. Data from all official female and male finishers with name, sex, age, calendar year, split times at 5 km, 10 km, 15 km, 20 km, 25 km, 30 km, 35 km, 40 km and finish and hourly values for temperature (°Celsius), barometric pressure (hPa), humidity (%) and sunshine duration (min) between 09:00 a.m. and 04:00 p.m. were obtained from official websites. A total of 560,731 marathon runners' records were available for analysis (342,799 men and 217,932 women). Pearson and Spearman correlation analyses were performed between the average running speed and the weather variables (temperature, pressure, humidity and sunshine). Ordinary Least Squares (OLS) regressions were also performed. The runner´s records were classified into four performance groups (all runners, top 100, top 10 and top 3) for comparison. Differences in running speed between the four performance groups were statistically significant (p < 0.05) for both men and women. Pearson (linear) correlation indicated a weak and positive association with humidity in the top 10 (r = 0.16) and top 3 (r = 0.13) performance groups that the running speed of the elite runners was positively correlated with humidity. Regarding sunshine duration, there was a weak and positive correlation with the running speed of the elite groups (r = 0.16 in the top 10 and r = 0.2 in the top 3). Spearman correlation (non-linear) identified a weak but negative correlation coefficient with temperature in all runners’ groups. Also, non-linear positive correlation coefficients with humidity and sunshine can be observed in the Spearman matrixes. A Multivariate Ordinary Least Squares (OLS) regression analysis showed no predictive power of weather factors. For elite runners competing in the ‘New York City Marathon’ between 1999 and 2019, the main findings were that elite runners became faster with increasing humidity and sunshine duration while overall runners became slower with increasing temperature, increasing humidity and sunshine duration. Weather factors affected running speed and results but did not provide a significant predictive influence on performance.
Mucus-penetrating dendritic mesoporous silica nanoparticle loading drug nanocrystal clusters to enhance permeation and intestinal absorption
Authors: Zhou Weicheng , Li Biao , Min Rongting , Zhang Zengzhu , Huang Guiting , Chen Yingchong , Shen Baode , Zheng Qin , Yue Pengfei
Published: December 2022

mPEGylated AG@mPEG-DMSN possesses excellent mucus-penetrating ability dependent on steric repulsion and significantly improved cell uptake of AG owing to surface dendritic superstructures.
Thermoresponsive shear-thinning hydrogel (T-STH) hemostats for minimally invasive treatment of external hemorrhages
Authors: Mecwan Marvin , Haghniaz Reihaneh , Najafabadi Alireza Hassani , Mandal Kalpana , Jucaud Vadim , John Johnson V. , Khademhosseini Ali
Published: December 2022

p(NIPAM) and LAPONITE®-based thermoresponsive shear-thinning hydrogel (T-STH) hemostats are designed to function as reversible hemostats for emergency situations. They exhibit temperature dependent coagulation and improved clotting times.
Ultrasound-mediated piezoelectric nanoparticle modulation of intrinsic cardiac autonomic nervous system for rate control in atrial fibrillation
Authors: Han Jiapeng , Zhang Yuanzheng , Wang Xiaofei , Zhang Guocheng , Yu Zhiyao , Wang Changyi , Xu Tianyou , Zhou Zhen , Yang Xiaomeng , Jin Xiaoxing , Liu Chenzhe , Zhou Liping , Wang Yueyi , Tang Baopeng , Guo Shishang , Jiang Hong , Yu Lilei
Published: December 2022

Ultrasound-mediated piezoelectric nanoparticle modulation for rate control in atrial fibrillation.
D–A–D organic small molecules with AIE effect for fluorescence imaging guided photothermal therapy
Authors: Yuan Lin , Su Yingbin , Yu Bing , Shen Youqing , Cong Hailin
Published: December 2022

Near infrared (NIR) fluorescent organic molecules as fluorescent probes accurately guide photothermal therapy as a potential antitumor method.
Steric effects of CN vacancies for boosting CO2 electroreduction to CO with ultrahigh selectivity
Authors: Zhang Qiang , Wang Jianlin , Guo Fang , Zhou Yang , He Ge , Xu Junqiang
Published: December 2022

We have reported that the CN vacancies was obtained by H2 cold plasma bombardment. The steric effect of VCN can decrease the free energy barrier of *COOH and further crack into CO under low overpotential.
Unravelling the correlation of dielectric barrier discharge power and performance of Pt/CeO2catalysts for toluene oxidation
Authors: Wang Bangfen , Li Xiufeng , Sun Yuhai , Xiao Hailin , Fu Mingli , Li Shuhua , Liang Hong , Qiao Zhiwei , Ye Daiqi
Published: December 2022

Two “volcano” peaks in the relevant activity curve showcased that plasma discharge power had a significant impact on the activity of Pt/CeO2-Pxcatalysts and modulating discharge power could be regarded as an efficient method to optimize catalyst performance.
Tweaking the bridge in metallocene Zr(iv)/W(iv) bimetallic hydrides
Authors: Fernando Selwin , Landrini Martina , Macchioni Alceo , Hughes David L. , Budzelaar Peter H. M. , Rocchigiani Luca
Published: December 2022

σ-Bond metathesis between zirconocene cations and Cp2WH2 affords a bimetallic bridging hydride with an out of plane configuration and no M–M interaction. Small molecules react predominantly at the Zr-C bond in the absence of bimetallic cooperativity.
Field based studies on aging characteristics of pristine and aged plastic debris in a coastal environment, Bohai Bay, China
Authors: Guan Shijia , Zhang Xiaohan , Ma Yongzheng , Niu Zhiguang
Published: December 2022

A field experiment of pristine and laboratory pre-aged plastic debris was carried out in a coastal environment. More cracks and biofilms were formed on the surface of pre-aged plastics and no differences in physicochemical properties were found.
PEDOT:PSS-treated laser-induced graphene-based smart textile dry electrodes for long-term ECG monitoring
Authors: Maithani Yogita , Mehta B. R. , Singh J. P.
Published: December 2022

Reliable detection of physiological signals from the human body is essential for health monitoring, preventive care, and treatment.
Effects of magnetism and size of nano-oxide inclusions on the thermoelectric properties of Ge0.96Bi0.06Te
Authors: Zhu Can , Wang Jian , Zhu Xinqiang , Zhang Shun , Xu Feng , Luo Feng , Wang Jiafu , Zhang Yan , Liu Hongxia , Sun Zhigang
Published: December 2022

The Ge0.96Bi0.06Te composite incorporated with just 2.53 × 1020 m−3 superparamagnetic 30 nm Fe3O4 inclusions obtains a high ZT, which is comparable with that of the composite embedded with 6.91 × 1020 m−3 non-magnetic 30 nm TiO2 inclusions.
An in situ, reversible fluorescent paper sensor for selective detection of ambient CO2
Authors: Zhang Chu , Ding Yiwen , Zhou Min , Xiang Yu , Tong Aijun
Published: December 2022

A selective fluorescent paper sensor, consisting of an ionic liquid ([DBUH]+[Im]−) and a fluorophore (ANT-PPh3), can reversibly detect CO2 with fluorescence enhancement.
Resource allocation for Vehicle‐to‐Everything communications: A survey
Authors: Brahmi Ibtissem , Koubaa Hend , Zarai Faouzi
Published: December 2022

The Deployment of new techniques to accommodate high data throughput, significant reliability, and quality of service (QoS) delivery prompts the use of 4G and 5G networks in several applications. In these networks, Vehicle‐to‐Everything (V2X) communications authorised by device‐to‐device cellular links (D2D) have gained momentum because of their potential to improve road safety, efficiency, and convenience. This improvement is to be provided by different types of V2X communications, including Vehicle‐to‐Pedestrian (V2P), Vehicle‐to‐Vehicle (V2V), Vehicle‐to‐Infrastructure (V2I), and Vehicle‐to‐Network (V2N) communications. However, considering several limiting factors such as mobility and increasing number of vehicles, efficiency of using wireless resources is a challenging task. Indeed, different research works on V2X radio resource allocation have been studied and evaluated with respect to several criteria. In this study, a survey of recent works but in a different way synthesising radio resource allocation methods is presented. Resource allocation classification into different categories is proposed. This classification is related to three main factors. The first takes into account the selection mode factor. It highlights the use of different approaches in each of the centralised, distributed, and mixed modes. The second one takes into account the considered performance criteria, including capacity, priority, delay etc. The last one focuses on the methods and scenarios used to evaluate a resource allocation approach.
Edible Film from Corn Cob and Plasticizer with Mixing Process
Authors: Sari Ni Ketut , Ernawati Dira , Wurjani Widi
Published: December 2022

Plastic substitute material with biodegradable vegetable plastic in the form of edible film is an alternative material for vegetable plastics that can decompose naturally. The raw material for an edible film consists of corn cob flour and a mixture of plasticizers in the form of glycerol and sorbitol. The process of mixing edible film raw materials by means of dispersion, heating, printing, and drying. Variable corncob flour is 5-9 grams and the ratio of plasticizer glycerol-sorbitol is 0.25-4. These characteristics incorporate the esteem of malleable quality with the biggest esteem of 0.536 MPa and the littlest 0.066 MPa. The esteem of elongation with the biggest esteem of 21.4% and the littlest 4.1%, film thickness with the biggest esteem of 0.26 mm and the littlest esteem of 0.12 mm, and water vapor penetrability with the biggest esteem of 11.83 gr/m2 day and the littlest 8.86 gr/m2 day. The most excellent consumable film comes about was gotten at the proportion of glycerol-sorbitol plasticizer 1.0 and 7 grams of corn cob flour. Based on the characteristics of tensile strength, elongation, film thickness, and water vapor permeability, the results obtained to the requirements of edible films, but are still below the requirements of the Japanese Industrial Standard (JIS).
Sago Extraction Machine Design
Authors: Cipto  , Parenden Daniel
Published: December 2022

The production of sago starch in Papua is around 200 thousand tons per year, even though the potential is 4.75 tons of dry starch per year. The large potential for sago starch production cannot be realized optimally due to the low production capacity. The production capacity is doubtful because the sago processing process is still carried out traditionally. The problems encountered can be solved by applying machining technology to the sago production process. The application of technology in the form of production machines will improve the quality of sago starch and production capacity. The production capacity of sago starch can be increased through the application of technology in the production process. Especially the sago pith grating machine technology and sago starch extraction machine technology, because these two processes consume the most time when using traditional methods. The working principle of the sago starch extraction machine that has been made is that the rotation generated by the driving motor is channeled through the pulley transmission and the V-belt drives the gearbox, the rotation of the gearbox output shaft through the pulley transmission and the V-belt drives the stirring shaft. The production capacity of the sago extraction machine is planned to be 80 kg/hour. The design of the sago extraction machine uses wheels to facilitate the mobilization of the machine to the sago plantation area.
Characterizing Instant Powder Drink Mixed of Kersen Leaves (Muntingia calabura) and Secang Wood (Caesalpinia sappan L.) with Maltodextrin Addition
Authors: Sarofa Ulya , Muliawati Doko Febi
Published: December 2022

This study aims to determine the effect of the proportion of kersen leaves extract with secang wood and the addition of maltodextrin on the characteristics of instant powder drink and determine the best treatment combination. This study used a completely randomized design (CRD) with 2 factors, namely the proportion of kersen leaves extract and secang wood (75: 25, 50: 50, and 25: 75) and the addition of maltodextrin (5%, 10%, 15%). The data obtained were analyzed statistically using analysis of variance (ANOVA) at a 95% confidence level, if there was a difference between treatments, it was continued with Duncan’s test = 5%. The best treatment was obtained at the proportion of kersen leaves and secang wood 25: 75 with the addition of 15% maltodextrin with a water content of 4.24%; ash content 1.17%; Solubility 94.48%; total phenol 126.51 mg TAE/gr sample; antioxidant activity 57.24%; vitamin C 1.87 mg/100 grams; The average sensory evaluation value of color was 4.15 (like), aroma was 3.85 ( rather like)and taste was 3.6 (rather like).
Study Of Manufacturing Composite Particle Boards of Sago/Rumbia Leaf (Gaba-Gaba) Using Epoxy Filler and Fiberglass Filler on Physical Properties of Composites
Authors: Samad Sudarman , Muhammad Sri A , Ishak
Published: December 2022

The current development of science and technology, especially in the field of materials, causes people to prefer to use instant construction materials because they are practical, solid and durable, and easy to obtain, so that people, especially sago/rumbia processing farmers, only use the contents of the stems as flour. In contrast, the -other parts of sago/rumbia are no longer used, so they become waste. Research on particle composite materials and sago/sago leaf stalk fibers, using resin fillers and fiberglass catalysts, as a study on the manufacture of composite boards to compare with previous studies using epoxy fillers and fiberglass filler studies to see the ability of physical and economic properties to manufacture boards. Composites in previous studies. This study uses a testing method using the standard SNI 03-2105-2006 [1].
Direct Mapping and Turtle Ontology for Management of Indonesian Movies Knowledge
Authors: Permatasari Ayu Novira Shinta , Jayadianti Herlina
Published: December 2022

Web 2.0 or conventional web has developed into Web 3.0, known as semantic web. Semantic web technology requires ontology as the backbone in understanding a concept of knowledge. In the ontology computing process, the Resource Description Framework (RDF) is used as a framework to define web resources in triple form (subject-predicate-object) so that they can form metadata and describe the information contained on the web. The data used in this study is Indonesian movies data obtained from Kaggle in Comma Separated Values (.csv) format with a total of 242 lines of Indonesian movies data. The data processing is carried out by direct mapping using the help of DB2Triples to generate data from MySQL into RDF in turtle format (.ttl) file. The results shown that direct mapping can be used to map data from RDB to RDF semi-automatically. The data is mapped into the RDF according to the schema on the RDB without input from the user, so the results provided cannot be adjusted to the needs or desires of the user. Furthermore, the RDF generated in the turtle file format has formed classes and individuals automatically, but to be able to be used as a semantic web resource, RDF needs to be processed manually to form data properties and object properties, as well as assigning instance values.
The Suitability of Seaweed Cultivation with Geographic Information Systems on Lembeh Island
Authors: Kumaat Joyce C
Published: December 2022

The purpose of this study is to find the suitability of seaweed cultivation land on Lembeh Island and its surroundings. The data collection technique in this study was divided into several events, namely primary data collection, where the implementation was carried out in the field such as conducting a ground check from the results of the analysis. In addition, there are also secondary data that generally come from local government data related to this study. In this study, the type of data used was data related to seaweed cultivation such as: protection, basic substrate, temperature, pH, current, depth, MPT, DO, salinity, phosphates, and nitrates. Based on these data, interpolation will be carried out which aims to predict grid values that are not represented by sample points. The interpolation used is Inverse Distance Weighting (IDW). The percentage of suitability of seaweed cultivation in the waters of Lembeh Island and Bitung City has 2 categories. The Unsuitable (N) has a percentage of 41%, and for the Category Suitable (S1), which is a highly recommended zone for seaweed cultivation, has a percentage of 59%. The percentage of this very suitable area is an area that is still classified as safe from sea transportation activities in Bitung City.
Hopf Bifurcation for Detritus Food Chain in Mangrove Ecosystem
Authors: Savitri Dian , Sofro A’yunin , Maulana Dimas A.
Published: December 2022

We proposed a prey-predator model portraying interaction in Detritus food chains. The primary view of this paper is to describe the interaction in the Detritus food chain due to the presence of a predator in mangrove ecosystems. Predation by assuming that the predator takes more time to eat its prey. We analyze the local stability of the equilibria point. Numerical simulations are achieved to clarify the theoretical result and display the change in the equilibria point solution through a bifurcation diagram. The numerical continuity of carrying capacity parameters in the system solution indicated the presence of the Hopf Bifurcation.
Efforts to Mitigate the Quality of Surabaya River Water as a Drinking Water Source
Authors: Cahyonugroho Okik Hendriyanto , Hariyanto Sucipto , Supriyanto Ganden
Published: December 2022

The aim of this study is to decide the strategy of mitigating the quality of river water of the Surabaya River as raw source for drinking water. The study was carried out during both the rainy (January – February 2021) and dry seasons (September – October 2021). Research sampling uses random sampling in term of observation at four Locations with different activities. The sample obtained was tested for its quality of water indicators, such as temperature, brightness, pH, dissolved oxygen, organic matter, nitrates,and phosphates). The results showed that indicator of pH, temperature, and nitrates, met class II water qualitystandards. However, indicators of dissolved oxygen, organic matter, and phosphates had not met class II as stated in the Regulation of Government 82/2001. Lightly pollution identified the water quality status of the Surabaya River in the rainy and dry seasons. As a result, efforts to mitigate water quality were required,including regulating water infiltration, monitoring water quality at water sources, conducting afforeLocation programs, reorganizing settlements and industries on watershed banks, and incorporating biological treatment using biofilter technology into the Surabaya River's initial water treatment process.
Analysis of Noise Levels Due to Vehicle Traffic Sounds in the Environment Around Merauke City Arterial Roads Before and During the Pandemic
Authors: Nababan Dewi Sriastuti , Utary Chitra , Akbar Muh
Published: December 2022

The purpose of this study was to determine the level of noise generated by motorized vehicles passing on arterial roads in Merauke City before the pandemic and during the pandemic. The method used in this research is the observation method. Measurement of vehicle traffic sound using Sound Level Meter.The equipment is placed 5 meters from the edge of the road, and 1.2 meters from the road surface.Measurements were carried out for 3 days for 7 hours. The measurement data is then processed to obtain the value of the noise level (Leq). The results of the analysis show that the noise level beside the arterial road before the pandemic (in 2019) was 72.21 dB and during the pandemic (in 2021) it was 68.54 dB. There was a decrease in the noise level as a result of a decrease in vehicle activity during the period of implementation of the community activity restriction (PPKM). Environmental conditions besides the arterial road are office and trade areas, so based on the noise level standard, the noise level value obtained has exceeded the quality standard, which is 65 dB.
Speed Control of Induction Motor Using Variable Frequency Driver (VFD) Method Based On Arduino Nano
Authors: Rusdi Muhamad , Jayadi Jayadi , Mangera Paulus , Ponadi Acep , Wakole Petrus
Published: December 2022

This research aims to control the speed of an induction motor by exploiting changes in the fundamental frequency. The inverter as the main part of the variable frequency driver (VSD) uses the IRFZ44n Mosfet as a power switch with a full bridge topology to convert the DC source to AC power. Fundamental frequency manipulation takes place during the conversion process. The method used is to change the variable fundamental frequency of the SPWM signal generated by the Arduino nano to control the power switch. Experiments are carried out based on two stages, namely simulation, and experiment. The simulation is performed using the Pspice A/D Lite software to take time sample data (HIGH and LOW) at each frequency change of 13Hz, 25Hz, 38Hz, and 50Hz, then the sample data is input on the Arduino nano as an SPWM signal generator to control the power switch. The results of the variable frequency drive test are the frequencies generated to drive the induction motor at 12.50 Hz, 24.04 Hz, 35.71 Hz, and 48.54 Hz at motor speeds from 227.7 to 1359.6 rpm.
CFD Analysis of Journal Bearing by Modifying The Roughness Surface
Authors: Susilowati S. , Karaman Novel , Muchammad  , Setyana B. , Irawan Fernanda Surya , Tauviqirrahman Mohammad
Published: December 2022

A journal bearing is a machine part that is used to ensure that the shaft always rotates in the opposite direction of the axis. Journal bearings are chosen because they are well-suited for use in mechanical systems that demand precision, speed, and a high load capacity. Recent years have seen an increase in research on how to improve the tribological performance of bearings by considering the design/architecture of these bearings. Numerous scientists have developed numerous methods for measuring pressure distribution, load-carrying capacity, acoustic power level, force friction, and cavitation phenomena in order to improve the performance of tribology, particularly in journal bearings. As a result, hydrodynamic lubrication was used in the investigation. The investigation was conducted using a computational fluid dynamics (CFD) three-dimensional journal bearing model that took cavitation into account. Additionally,the location of the heterogeneous rough/smooth bearing pattern was modified, as was the shaft rotational speed. The results of this study indicate that when the surface roughness is applied to journal bearings in a variety of locations with heterogeneous rough/smooth bearing patterns, the tribological performance of journal bearings is significantly improved, and that high shaft rotational speed has a significant effect on the tribological performance of journal bearings.
Potential Analysis of Renewable Energy in Nduga District Papua Mountain Province
Authors: Karim Johan , Hardiantono Damis
Published: December 2022

The new renewable energy potential in Papua province is 26,529 MW and the installed capacity in 2018 is 20 MW. In 2025 primary energy is targeted to reach 23% to 31%. The river to the airport is 1.5 km from the airport and the Nogoliah river is at an altitude that has enormous potential and is 24 km from the center of Kenyam. With solargis , topographic, measurement methods, and the data 137,450 - 139,500 East Longitude and 4,000 - 4,500 South Latitude produces data for solar Pvout = 1270,7 kWh/Wp = 3,481kWh/Wp, GHI = 1607,4 kWh/m2, DNI = 890,2 kWh/m2, DIF = 929,9 kWh/m2, GTI = 1594,5 kWh/m2 =5740,1 MJ/m2. Data Wind 2019 capacity 1kW, Hub.height 80 m, vestas V90 2000 model turbine, highest daily average in October 0.02% and low MCF in December 1% -highest in February 4.50%. From the topographic map data obtained the slope of the Kenyam river level.
Zustandekommen von ambulanter Psychotherapie vor und nach der
Psychotherapiestrukturreform von 2017 – Daten aus Praxen mit und
ohne psychoonkologischem Schwerpunkt
Authors: Engesser Deborah , Maier Lena , Mittag Martina , Lang Klaus , Nagel-Brotzler Almut , Wirp Bernhild , Kobes Jörg , Singer Susanne
Published: December 2022

Hintergrund Die Psychotherapiestrukturreform im Jahr 2017 bedingte einige
Änderungen in der Arbeit niedergelassener Psychotherapeut*innen.
Wir untersuchten, ob nach der Reform auf ein Erstgespräch
häufiger eine Psychotherapie folgte als vor der Reform.

Methoden Im Rahmen einer retrospektiven Kohortenstudie untersuchten wir
anhand von Aktenanalysen in psychotherapeutischen Praxen, wie häufig
nach einem Erstgespräch eine psychotherapeutische Behandlung begonnen
wurde. Verglichen wurde der Zeitraum drei Jahre vor und nach der Reform. Ein
möglicher Zusammenhang zwischen der Reform und dem Zustandekommen einer
Psychotherapie wurde mittels logistischer Regression analysiert.

Ergebnisse Insgesamt 1548 Akten aus 9 Praxen konnten ausgewertet werden,
davon 755 vor und 793 nach der Reform. Vor der Reform erhielten 40%
(n=303) der Patient*innen, die ein Erstgespräch in den
Praxen geführt hatten, anschließend eine Richtlinientherapie.
Nach der Reform folgte auf 46% (n=360) der Erstgespräche
eine psychotherapeutische Behandlung (Richtlinientherapie oder Akutbehandlung).
Die logistische Regression ergab eine um 36% erhöhte
Wahrscheinlichkeit, nach der Reform eine Behandlung zu erhalten im Vergleich zu
vor der Reform (Odds Ratio 1,36 nach vs. vor Reform, 95%
Konfidenzintervall 1,09 – 1,68).

Schlussfolgerung Unsere Studienergebnisse legen nahe, dass
Patient*innen nach der Reform höhere Chancen auf eine
weiterführende Behandlung nach einem Erstgespräch haben als vor
der Reform. Ob in den Praxen absolut mehr Behandlungen durchgeführt
wurden, lässt sich aus unseren Daten nicht schließen.
Der Hilfsverein für Geisteskranke im Königreich
Sachsen
Authors: Döbold Henrik , Steinberg Holger
Published: December 2022

Die Studie widmet sich erstmals dem Thema sächsischer Hilfsvereine
für Geisteskranke. Ausgehend von erhaltenen Jahresberichten wird ein
Überblick über die Geschichte des „Hilfsvereins
für Geisteskranke im Königreich Sachsen“ von seiner
Gründung 1898 bis zu seiner mutmaßlichen Einstellung
während des Zweiten Weltkrieges gegeben. Sein Ziel war die
Unterstützung psychisch Kranker und ihrer Angehörigen durch
finanzielle Zuschüsse und Aufklärung, wozu ein Netzwerk von
Vertrauensleuten in die einzelnen Bezirke hinein bestand. Der Verein verlor nach
dem Ersten Weltkrieg durch Vermögenseinbußen und die Etablierung
anderer Fürsorgestrukturen an Einfluss. In den 1920er-Jahren wurden im
Verein im Kontext eugenischer und sozialdarwinistischer Tendenzen in der
Gesellschaft zunehmend Erbbiologie und Rassenhygiene diskutiert. Nach der
Gleichschaltung im Nationalsozialismus wurden die Vereinsstrukturen
schließlich zur Propagierung rassenideologischer Gedanken
missbraucht.
Möbius-Syndrom – Fazialis-/Abduzensparese mit expressiver Sprachstörung
Authors: Burghardt Katharina
Published: December 2022

Das Möbius-Syndrom, auch „okulofaziale Paralyse“ genannt, wird in der Praxis selten zugeordnet. Die bestehende Fazialislähmung wird als primäre neurologische Erkrankung gesehen. Eine genetische Diagnostik wird – wenn überhaupt – erst spät veranlasst. Dabei ist ein interdisziplinäres Therapiekonzept vorhanden. Die Diagnose wird meist symptomatisch gestellt: Kieferorthopädisch ist häufig der frontal offene Biss auffällig. Es besteht eine angeborene uni- oder bilaterale Fazialisparese (N. VII) sowie eine ein- oder beidseitige Abduzensparese (N. VI). Eine Ursachenklärung ist beim Möbius-Syndrom nicht sicher möglich. Eine mögliche Ursache ist die „subclavian artery supply disruption sequence“ (SASDS). Es gibt 5 Kandidatengene, in denen Mutationen als Ursache des Möbius-Syndroms oder atypischen Möbius-Syndroms identifiziert werden konnten. Lokalisierte chromosomale Regionen sind nicht eindeutig fassbar. Das Möbius-Syndrom ist schwierig von anderen ähnlichen neurologischen Erkrankungen wie der Poland-Sequenz abzugrenzen; als Differenzialdiagnose kommt auch das DiGeorge-Syndrom in Frage.
Tunneled Hemodialysis Catheter Insertion: Technical and Clinical Considerations
Authors: Yaxley Julian
Published: December 2022

Tunneled hemodialysis catheter insertion is a common and important procedure. Clinicians involved in the placement or maintenance of tunneled catheters require an appreciation of their best clinical application. Although comprehensive guidelines are available, many aspects of the published literature on this subject remain uncertain. This primer offers a concise, evidence-based discussion of 10 fundamental, everyday questions with respect to tunneled hemodialysis catheter insertion.
Antiferromagnetism: An efficient and controllable spin source
Authors: Bai H. , Zhang Y. C. , Han L. , Zhou Y. J. , Pan F. , Song C.
Published: December 2022

Antiferromagnetic (AFM) spintronics is an emerging field, with significant advances in particular in the study of the tunable spin generation, transport, manipulation, and detection based on the control and probe of AFM moments. The Néel-vector-dependent spin current generation in AFM materials makes them an efficient and controllable spin source, paving the way for future spintronic devices with ultralow power consumption and high operability. Herein, we aim to provide a comprehensive review of recent progress in charge-spin conversion mediated by AFMs. First, we present a brief summary of several typical characterization techniques of charge-spin conversion. Then, we focus on the recent efforts for improving the charge-spin conversion efficiency and performances of spin torques in the antiferromagnet/ferromagnet bilayer. In the third part, we review the controllable spin current and multidirectional spin polarization generated by AFMs and the resultant field-free magnetization switching. Finally, we discuss the prospects of the AFM spin sources, which will inspire more in-depth studies and advance practical applications.
Analysis of surface effect and flexoelectric effect on the electromechanical responses of bilayered transversely isotropic rectangular micro-plate
Authors: Zhou Shasha , Zhang Rongmin , Qiao Jinwei , Li Anqing , Zhou Shenjie
Published: December 2022

A new model of a bilayered transversely isotropic piezoelectric rectangular micro-plate with a distributed load is developed on the basis of Kirchhoff's plate theory and the extended linear piezoelectricity theory to characterize the piezoelectric micromachined ultrasonic transducer. The model takes into account both the surface effect and the flexoelectricity effect. The governing equation at the simply supported boundary condition is derived according to the variation principle. Based on the new model, the size dependent electromechanical coupling behaviors of the bilayered piezoelectric rectangular micro-plate are investigated. Considering the flexoelectric effect and surface effect synchronously, the numerical result indicates that the size dependence of the normalized central deflection decreases as the residual surface stress increases. For negative residual stress, the surface effect is the main influencing factor. While for positive residual stress, the surface effect dominates only when the ratio of thickness to length is smaller than about 25; otherwise, the flexoelectric effect will be more crucial. Moreover, if the thickness of the piezoelectric layer is less than about 40 nm, the electrical potential and polarization show a stronger size dependence. These results will be helpful to design and manufacture a piezoelectric micromachined ultrasonic transducer.
Hybrid integration of chipscale photonic devices using accurate transfer printing methods
Authors: Smith J. A. , Jevtics D. , Guilhabert B. , Dawson M. D. , Strain M. J.
Published: December 2022

Transfer printing is becoming widely adopted as a back-end process for the hybrid integration of photonic and electronic devices. Integration of membrane components, with micrometer-scale footprints and sub-micron waveguide dimensions, imposes strict performance requirements on the process. In this review, we present an overview of transfer printing for integrated photonics applications, covering materials and fabrication process considerations, methods for efficient optical coupling, and high-accuracy inter-layer alignment. We present state-of-the-art integration demonstrations covering optical sources and detectors, quantum emitters, sensors, and opto-mechanical devices. Finally, we look toward future developments in the technology that will be required for dense multi-materials integration at wafer scales.
Optimizing dynamical functions for speed with stochastic paths
Authors: Bone Rebecca A. , Green Jason R.
Published: December 2022

Living systems are built from microscopic components that function dynamically; they generate work with molecular motors, assemble and disassemble structures such as microtubules, keep time with circadian clocks, and catalyze the replication of DNA. How do we implement these functions in synthetic nanostructured materials to execute them before the onset of dissipative losses? Answering this question requires a quantitative understanding of when we can improve performance and speed while minimizing the dissipative losses associated with operating in a fluctuating environment. Here, we show that there are four modalities for optimizing dynamical functions that can guide the design of nanoscale systems. We analyze Markov models that span the design space: a clock, ratchet, replicator, and self-assembling system. Using stochastic thermodynamics and an exact expression for path probabilities, we classify these models of dynamical functions based on the correlation of speed with dissipation and with the chosen performance metric. We also analyze random networks to identify the model features that affect their classification and the optimization of their functionality. Overall, our results show that the possible nonequilibrium paths can determine our ability to optimize the performance of dynamical functions, despite ever-present dissipation, when there is a need for speed.
Acoustic analysis of jet atomization for uniform dispersion of nano- and micro-droplets
Authors: Matsuura Hiroshi , Furukawa Hiromitsu , Kondo Atsushi , Tanikawa Tamio , Hashimoto Hideki
Published: December 2022

In this study, the mechanisms of jet atomization were analyzed based on a frequency analysis of atomization sounds in the audible range (∼20 kHz). Jet atomization is a two-dimensional, high-speed atomization using a diaphragm, and interesting acoustic signals and atomization phenomena were detected on hydrophobic and hydrophilic diaphragms. The hydrophilic diaphragm strongly interacted and resonated with the surface wave, resulting in symmetrical jet atomization relative to the diaphragm. The resonance between the diaphragm and the surface wave was supported by a calculation of the eigenfrequency of the diaphragm and the coincidence of the droplet diameters as calculated from Lang's equation. Notably, the diaphragm excited by the ultrasonic transducer acted as a new transducer vibrating perpendicular to the transducer. As a result, when the diaphragm and the surface wave were in resonance at 2.4 MHz, a symmetrical two-dimensional high-speed jet atomization was generated in the direction perpendicular to the transducer’s vibration direction. This study also revealed that the atomization state can be determined based on the acoustic analysis. This acoustic analysis of atomization sounds can be applied in more advanced atomization control, such as for providing uniform dispersions of droplets containing DNA, drugs, or microplastics.
Symmetry-enforced planar nodal chain phonons in non-symmorphic materials
Authors: Yang Hong-Ao , Wei Hao-Yu , Cao Bing-Yang
Published: December 2022

Nodal chains in which two nodal rings connect at one point were recently discovered in non-symmorphic electronic systems and then generalized to symmorphic phononic systems. In this work, we identify a new class of planar nodal chains in non-symmorphic phononic systems, where the connecting rings lie in the same plane. The constituting nodal rings are protected by mirror symmetry, and their intersection is guaranteed by the combination of time-reversal and non-symmorphic twofold screw symmetry. The connecting points are fourfold degenerate while those in previous works are twofold degenerate. We found 8 out of 230 space groups that can host the proposed planar nodal chain phonons. Taking wurtzite GaN (space group No. 186) as an example, the planar nodal chain is confirmed by first-principles calculations. The planar nodal chains result in two distinct classes of drumhead surface states on the [10(–1)0] and the [0001] surface Brillouin zones. Our finding reveals a class of planar nodal chains in non-symmorphic phononic systems, expanding the catalog of topological nodal chains and enriching the family of topological surface states.
Excitation and fragmentation of the dielectric gas C4F7N: Electrons vs photons
Authors: Ovad Tomáš , Sapunar Marin , Sršeň Štěpán , Slavíček Petr , Mašín Zdeněk , Jones Nykola C. , Hoffmann Søren Vrønning , Ranković Miloš , Fedor Juraj
Published: December 2022

C4F7N is a promising candidate for the replacement of sulfur hexafluoride as an insulating medium, and it is important to understand the chemical changes initiated in the molecule by collision with free electrons, specifically the formation of neutral fragments. The first step of neutral fragmentation is electronic excitation, yet neither the absorption spectrum in the vacuum ultraviolet (VUV) region nor the electron energy loss spectrum have previously been reported. Here, we experimentally probed the excited states by VUV photoabsorption spectroscopy and electron energy loss spectroscopy (EELS). We found that the distribution of states populated upon electron impact with low-energy electrons is significantly different from that following photoabsorption. This difference was confirmed and interpreted with ab initio modeling of both VUV and EELS spectra. We propose here a new computational protocol for the simulation of EELS spectra combining the Born approximation with approximate forms of correlated wave functions, which allows us to calculate the (usually very expensive) scattering cross sections at a cost similar to the calculation of oscillator strengths. Finally, we perform semi-classical non-adiabatic dynamics simulations to investigate the possible neutral fragments of the molecule formed through electron-induced neutral dissociation. We show that the product distribution is highly non-statistical.
On the lexical source of variable L2 phoneme production
Authors: John Paul , Frasnelli Johannes
Published: December 2022

The current study investigates two lexical explanations for variation in L2 production: approximate (‘fuzzy’) representations vs dual URs. The focus is on Quebec francophone (QF) production of English /θ ð/ and /h/, which a reading-aloud task shows to be highly variable. Variation is problematic for the assumption that, due to perceptual illusions, URs are inaccurate. How is accurate output generated from inaccurate URs? Approximate representations employ diacritics rather than distinctive features. Arguably, these representations do not consistently generate accurate output. Under dual URs, lexical entries contain both inaccurate URs due to initial misperceptions and accurate URs generated when learners become capable of perceiving L2 phonemes. These URs compete for selection, leading to variation. Perception findings from oddball and semantic incongruity tasks provide conflicting support for the explanations: perception is variable, as predicted under approximate representations; but typical L2→L1 substitutions are harder to detect than atypical L1→L2 substitutions, an asymmetry expected under dual URs. To resolve the contradiction, we reinterpret the latter findings as revealing an implicit strategy of corrective adjustment acquired through experience with L2 errors. While we conclude that the L2 lexicon employs approximate representations, an enduring enigma concerns the considerably higher rates of hypercorrect [h] than [θ ð].
From usage patterns to meaning construction
Authors: Thomou Paraskevi , Koutoulaki Marilena
Published: December 2022

The present study investigates the meaning construction emerging from figurative constructions involvingearandeyein Modern Greek. The study concerns authentic language data retrieved from a corpus search. Analysis takes into consideration the embodiment hypothesis, the development of chained metonymies and the interaction of metaphor and metonymy as the motivation for the usage patterns under investigation. The constructions analyzed reveal that the sense of vision is prioritized over hearing. Furthermore, constructional parameters of meaning show howearsandeyesare perceived in MG language and culture.Eyeis attributed the agent role in the constructions, whileearis the entity acted upon. Moreover, eyesare mainly perceived as reflections of different dimensions of the selfhood, whileearsare perceived as containers. A broader polysemy thus emerges for theeyethan for theear.