bluuebunny/crossref_metadata_2025 huggingface dataset:
Masonry buildings strengthened with textile-fiber composite (TRC) layers and fiber-reinforced cementitious (FRC) layers
Authors: Boen Teddy , Imai Hiroshi , Lenny  , Sarah E. Suryanto
Published: December 2021

In June 2015, the authors published a paper titled “Brief Report of Shaking Table Test on Masonry Building Strengthened with Ferrocement Layers” [1]. The authors suggested in that paper to replace the traditional way of constructing masonry houses using the so called practical columns and beams (herein after called traditional masonry houses) with bandaging using ferrocement layers on both sides of the walls as skin facings and brick wall as core. Since then, many masonry houses bandaged with ferrocement layers are built in Indonesia. Apart from constructing new earthquake resistant houses, ferrocement bandaging is also used for retrofitting existing as well as damaged houses after earthquakes. In the past decades, continuous fiber mesh was introduced to replace the steel wire mesh in a cementitious matrix. Since the early 2000, textile-based composites were used in the field of strengthening and seismic retrofitting of masonry as well as concrete structures. Originally these new “textile fiber composite” materials are called “Textile Reinforced Concrete” (TRC) in Europe. However, in the USA, the term used is “Fiber Reinforced Cementitious Matrix systems” (FRCM). Extensive research on FRCM / TRC were conducted. A wide variety of publications on the subject matter are now available worldwide. Apart from TRC, many technical studies are published addressing fiber reinforced cement and concrete composite. The term “Fiber Reinforced Cementitious” (FRC) is used and defined as concrete and/or cementitious matrix with suitable discontinuous fibers added to it for the purposes of achieving a desired level of performance in a particular property, such as modulus elasticity, tensile strength, and ductility [2]. Lately, the use of discontinuous fibers as reinforcement for concrete and cementitious matrix FRC are introduced by many practitioners and civil engineers. Adding fibers in concrete / cementitious matrix mixer simply like adding sand or admixtures, to create a homogenous, isotropic, strong, tough, durable, and moldable structural materials [2]. In this paper the authors used the terms of TRC and FRC as defined by Naaman [2, 3], namely TRC for fiber-cement with fiber-mesh and FRC for fiber-cement with discontinuous fiber. This paper provides a simplified global analysis of the overall structure strengthened with FRCM / TRC as well as strengthened with FRC.
The comparative study of analyzing the T-shaped and square-shaped concrete columns
Authors: Sri Wahyuni Ade , Islam Mukhlis , Arian Putra Rizky
Published: December 2021

This study aims to analyze how much changes in column shape effect have on the strength of the column structure. This calculation is comparing a square-shaped concrete column with two different axis of a T-shaped column. Each sample is compared in terms of 6 different column dimensions, however, the cross-sectional area within the three samples ( Square, T-shaped axis1 and 2) has remained constant. The concrete quality (fc') is kept at 30 MPa while the reinforcement area used 1% and 5%. Column calculation analysis is using Hognestad stress-strain diagram relationship and finite difference method. The result shows, the greater the reinforcement ratio, the greater the difference of Mn value and the smaller the difference of Pn value, of T-shaped and square column for each area. The same cross-sectional area does not necessarily lead to the same behavior of a T-shaped column with a different axis
Flexural capacity of RC beams strengthened with near-surface mounted steel bars
Authors: Thamrin Rendy , Zaidir Zaidir
Published: December 2021

An experimental study carried out to observe the flexural capacity of reinforced concrete beams strengthened with Near Surface Mounted (NSM) steel bars is presented. The test was carried out on nine concrete beams. All tested beams were subjected to two-point monotonic loads. The ratio of longitudinal reinforcement (1%, 1.4%, and 2.4%) and NSM bars (1D16 and 2D16) were used as test variables. It was found from the test result that NSM steel bars significantly increase the flexural capacity of reinforced concrete beams. However, the strengthened beams failed in brittle mode, as indicated by a sudden drop of beams capacity. An analytical study was also conducted to obtain the flexural response of the specimens through all ranges of elastic and post-peak load. The prediction of the flexural capacity of the beams compares well with the test result.
Assessment and retrofitting of nursing faculty building of Andalas University, Padang, Indonesia
Authors: Fauzan Fauzan , Yarmawati Dina , Willy Dharma Sipayung Seno , Kurniawan Willy , Adifa Rozi
Published: December 2021

The Faculty of Nursing building is one of the administrative buildings at Andalas University. This building was designed by a planning consultant and began construction in 2013. However, during the construction period, it was found that the concrete quality was very low, that is fc'=14.32 MPa, so that the construction could not be continued because it was not in accordance with the planning quality, fc' =22.39 MPa. Therefore, it is necessary to evaluate the feasibility of the building structure before the construction is continued. In the structural analysis, the loads apllied are dead loads, live loads, and earthquake loads. The analysis was carried out using the application (software) ETABS. Based on the analysis results, it was found that the capacity of columns and beams of the building are not strong enough to withstand the loads acting on the structure. The inter story drift also does not meet the permit limit requirements according to the New Indonesian Earthquake Code, SNI 1726:2019. Therefore, it is necessary to retrofit (strengthen) the structure of the Nursing Faculty Building by re-designing the Detail Engineering Design (DED) on the beams and columns of the plan and jacketing the existing columns. Re-analysis results show that the retrofitted building structure has a strong enough capacity to carry loads acting on the structure and the inter story drift has met the permit limit requirements according to the SNI 1726:2019.
Seismic hazard on West Bandung district using non-linear earthquake response analysis
Authors: Sari Anggun Mayang , Fakhrurrozi Afnindar , Syahbana Arifan Jaya , Sarah Dwi , Setiadi Bambang , Daryono Mudrik Rahmawan , Bakar Rabieahtul Abu , Lee Jian Cheng
Published: December 2021

West Bandung District is one of the government areas that grow rapidly in West Java. Here several infrastructures such as Highspeed Rail Development, Modern Residences, Tourist Attractions Area, and International Retail Company supply major contributions to economic development. Rapid construction in Bandung Basin caused the government to pay attention to risk factors, especially building structures. One of the natural hazards that must be considered is the presence of an active Lembang fault. Therefore, there is a need for a study that takes into account how the earthquake waves damaged the buildings. In this study, an analysis of the soil dynamics due to earthquake ground motion from bedrock was carried out. The analysis is carried out using the wave propagation method, which is a non-linear analysis of the soil response. The research was conducted at 12 points locations in West Bandung District. As the result, the location with the highest PGA surface value is in the Mekar Jaya area, while the lowest risk is found in the Cililin area. Furthermore, this study provides scientific information on seismic hazards to support government disaster risk reduction programs.
Accelerating information of tsunami disaster using early warning system (EWS) Devices: smart solution for communication, navigation and surveillance due to tidal sea level
Authors: Santosa Nurhadi , Anwar Nadjadji , Muljo Sukojo Bangun , Al Madhoun Wesam
Published: December 2021

Oneof the important aspects in reducing Tsunami Risk is understanding Natural Hazards. The loss of INA TEWS equipment worth hundreds of billions of rupiah and the occurrence of the Tsunami in Aceh and other parts of Indonesia are warnings that our society needs the help of effective early warning tools at affordable prices. Using this device will make it easier for the community to monitor natural events from the field and reduce disaster risk. Currently the government has purchased hundreds of units of JRC-UNESCO products, namely IDSL (Inexpensive Device for Sea Level), but this device takes 21 minutes of information to reach the community. Therefore, a new device that has been prepared is needed. (FIDELA EARLY WARNING SYSTEM/FEWS) is a tool that involves the Equipment sector, Operations sector and Community sector. The results shows that this device is that the time for sending information to the public is only 5 minutes.
Hard and soft measures for earthquake and tsunami disaster mitigation
Authors: Kiyono Junji
Published: December 2021

A destructive earthquake struck the Kobe region on January 17, 1995, and a massive earthquake and tsunami struck eastern Japan on March 11, 2011. We present an overview of the casualty aspects of the 2011 Tohoku earthquake compared with those of the 1995 Kobe earthquake. In the Tohoku disaster, some water gates and seawalls saved some villages from the tsunami effects, though some did not. Based on these examples, we discuss the efficiency of soft and hard measures and consider their respective merits and demerits. The main causes of death in the Kobe and Tohoku EQs were, respectively, collapsing buildings and drowning in the tsunami. Although the time to death was very short in both cases, people often have more time to evacuate in the case of an interplate earthquake leading to a tsunami. Basic countermeasures against tsunamis include such hard measures as water gates, seawalls, and embankments. Soft measures need to be implemented in areas where hard measures are insufficient
State of the art of seismic risk and loss assessment in structures
Authors: Aryanti Riza , Masrilayanti Masrilayanti
Published: December 2021

Earthquakes are known as one of the disasters that have fatal consequences for human safety. However, inevitably, the earthquake itself is not the leading cause of the losses suffered by humans, both material and soul. The most powerful thing in human safety is infrastructure such as buildings, bridges, and houses. Therefore, an in-depth analysis of the risk factors that the infrastructure will experience in a natural disaster is needed. There is a variable seismic hazard in the Southeast Asia region, ranging from high seismic hazard allied with the underneath of the Indonesian and Philippine archipelagos to moderate and low seismic tremors associated with a sizeable stable region on the Sunda Shelf. This paper describes the history of seismic risk and loss assessment of infrastructures. The method used is by doing literature reviews of the most recent research relating to seismic risk and assessment around the world. More than fifteen research results are studied and discussed to get a deep knowledge about seismic risk and the assessment of loss due to seismic disaster.
The efficacy of healthy drinks based on kaempferia galanga, ginger and garlic as phytobiotics on fat content of breast, percentage of abdominal fat and broiler carcass
Authors: Sari Tati Vidiana , Harahap Raja Indah Hamdy , Hasanah Uswatun
Published: December 2021

This study aimed to examine the effect of giving healthy drinks based on Kaempferia galanga, ginger and garlic on broiler rearing on the level of breast fat, percentage of abdominal fat and carcass. This research used a CRD with 7 treatments and 3 replications. The concentration of active ingredient in water solution treatment is 1.06%/L. The result showed that the giving of healthy drinks giving a very significant difference (P<0.01) on all parameters research. The result of DMRT test showed that the M2 treatment had fat content 58,96% which was significantly higher than M6(47.52%), M0(39.24%) and M1(34.65%) while the fat content in M3(32.21%), M4(33.31%) and M5(27.51%) were significantly lower than other treatments. The value of the percentage of abdominal fat at M0(2,28%) was very significantly the highest compared to other treatments and each treatments also gave very significant difference (P<0.01) results. The percentage of broiler carcasses in the M5(83.42%) gave a very significantly higher, while the M0(73,24%) gave a significantly lower than the other treatments. It can be concluded that the best healthy drink was given in the M5 treatments because it produced the lowest fat content and the highest carcass percentage of broiler meat.
Utilization of tekelan leaf extract (Chromolaena odorata L.) based on nanoliposome technology as treatment of antihyperglycemia
Authors: Rahmi Sofia , Rosidah  , Widyawati Tri , Sumaiyah
Published: December 2021

Metabolic disease that occurs due to abnormalities in insulin secretion and insulin action is said to be diabetes or hyperglycemia. One alternative that can be used for hyperglycemia management is to use tekelan leaves (C. odorata L.). The leaves of this tekelan plant have low water solubility and high permeability. A liposome is a good carrier to increase the solubility and penetration of the compounds it carries. This study aimed to develop a nanotechnological liposomal preparation from the ethanol extract of tekelan leaves as a hypoglycemic agent in diabetic male rats induced by nicotinamide 120 mg/kg BW and streptozotocin 60 mg/kg BW. Antihyperglycemia treatment was applied to nanoliposomes at a dose of 25 mg / kg BW, 125 mg / kg BW, 250 mg / kg BW, CMC-Na and 0.45 mg / kg BW of glibenclamide. The results obtained were at 12 ’sonication time, the resulting particle size is 145.5 ± 2.8 and PI 0.307 ± 0.03. The results of antihyperglycemia testing were obtained at a nanoliposome dose of 250 mg/kg BW produced the lowest blood glucose levels, namely, 86 ± 4.30 mg / dL.
Valorisation of brewers’ spent grain in different particle size in yogurt production
Authors: Naibaho Joncer , Jonuzi Emir , Butula Nika , Figiel Adam , Yang Baoru , Föste Maike , Laaksonen Oskar , Kütt Mary-Liis , Korzeniowska Małgorzata
Published: December 2021

The potential of brewers’ spent grain (BSG) as a functional food ingredient has been investigated for having high nutritional value. A high amount of dietary fiber of BSG shows a high ability to bind water; thus, it tends to solidify food mixture. This characteristic has a beneficial effect in the utilization of BSG as a filler and texturizer in yogurt. The study aims to evaluate the impact of the BSG addition in yogurt production and its quality. BSG was prepared in three different particle sizes, and an amount of 10% was added for yogurt fermentation. The impact of BSG addition was evaluated after 24 h of storage. The result shows that different particle sizes of BSG had no significant impact on pH and syneresis, while it significantly affected the amount of lactic acid and countable S. thermophilus. However, BSG increased the fermentation rate of yogurt, and had a positive impact on water holding capacity. A lower particle size had a higher amount of lactic acid and a lower S. thermophilus. The lower particle size lowered the lightness of the yogurt. Rheological analysis showed that a higher particle size of BSG increased the shear stress and viscosity of yogurt.
The effect of the comparison of fig leaves with stevia leaves and drying time on the quality of fig leaf teabags
Authors: Iranza Tantri A. , Suhaidi Ismed , Nainggolan Rona J.
Published: December 2021

Comparison of fig leaves with stevia leaves and drying time were evaluated for their effect on the quality of fig leaf teabags. The study was designed using a factorial completely randomized design with 2 factors: the ratio of fig leaves to stevia leaves (D) and drying time (P). The results of the analysis showed that the ratio of fig leaves and stevia leaves had a very significant effect on the water content, total sugar, and total phenol and had no significant effect on the crude fiber content. Drying time has a very significant effect on water content, total phenol, and crude fiber content, and has no significant effect on total sugar. The interaction between the 2 factors gave a very significant effect on the total phenol. The best fig leaf tea formulation is 95% fig leaf: 5% stevia leaf and 120 minutes drying time with antioxidant activity content of 23.81 g/mL.
Analysis of food availability in Medan City
Authors: Lubis Satia Negara , Emalisa  , Siregar Asri Maulidani
Published: December 2021

This study aims to (1) analyze the availability of food in the city of Medan (2) the availability of nutrients (energy, protein, and fat) compared to the Nutritional Adequacy Rate (RDA) (3) the diversity of food availability in the city of Medan. The research data were obtained from primary data and secondary data. The analytical method used is descriptive method using the Food Balance Sheet (FBS). The results showed that the availability of food in Medan City in 2020 was in the available category of 1,350.25 grams/capita/day or 489.93 kg/capita/year. The availability of nutrients (energy, protein, and fat) of food in Medan City has exceeded the recommended nutritional adequacy rate and is classified in the available category. The diversity of food availability in the city of Medan is quite diverse.
Nach der Bundestagswahl: Kommt eine neue Sparrunde?
Authors: Ulrich Volker
Published: December 2021

Die neue Bundesregierung wird bei Amtsbeginn eine beträchtliche Finanzierungslücke in der gesetzlichen Krankenversicherung (GKV) vorfinden. Nach der Prognose des Schätzerkreises vom 13. Oktober 2021 zu Einnahmen und Ausgaben der Krankenkassen im kommenden Jahr erwarten die Experten für das Jahr 2022 ein Defizit in der GKV in Höhe von 7 Mrd. Euro. Nachdem bereits ein steuerfinanzierter Bundeszuschuss in Höhe von 21 Mrd. in Aussicht gestellt wurde, verbleibt dennoch eine Deckungslücke in Höhe von 7 Mrd. Euro.
E-Health-Strategie: Berlin setzt Standards für digitalen Datenaustausch
Authors: Hohnstein Aileen
Published: December 2021

Die beiden größten Versorger der Hauptstadt, die Uniklinik Charité und der kommunale Klinikkonzern Vivantes, führen seit März eine gemeinsame digitale Behandlungsakte. Diese soll die medizinische Qualität in der Versorgungskette verbessern und den ökonomischen Nutzen für die Leistungserbringer erhöhen.
Babyboom, Pillenknick und unser großes Problem: der
demographische Wandel
Authors: Kühlein Thomas , Blumenthal Sandra
Published: December 2021

Kein Medikament war je so wirksam wie die Antibabypille. Sie hat wesentlichen Anteil
an zwei der größten Herausforderungen unseres Gesundheitswesens.
Erstens dem Glauben, alle Medikamente würden so gut wirken und zweitens dem
demographischen Wandel. Unsere Kultur ist von der Idee geleitet, dass man letztlich
durch Investition in Forschung und Technik alle Probleme lösen und alle
Unsicherheit des Lebens beseitigen kann. Dies hat zu einer Flut diagnostischer und
therapeutischer Möglichkeiten geführt, deren unkritischer oder
gewinnorientierter Einsatz sich am besten mit dem Begriff Überversorgung
beschreiben lässt. Vor allem binden sie unsere teuerste und knappste
Ressource, das medizinische Personal, das an anderer Stelle fehlt. Ein
Gesundheitswesen, das schon in normalen Zeiten an der Grenze seiner Belastbarkeit
steht, kommt in Krisenzeiten schnell an die Grenzen seiner Resilienz. Die Politik
der vergangenen 20 Jahre hat Wettbewerb und Konkurrenz im Gesundheitswesen
gefördert. Hat dieser Ansatz wirklich zu einer effizienteren,
kostengünstigeren und besseren Medizin geführt? Werden Innovation
und Wettbewerb die richtigen Antworten sein, wenn es darum geht das Problem des
demographischen Wandels zu lösen? Wir glauben beides nicht und fordern
deshalb zu Diskussion und Kooperation auf.
Editorial
Authors: Swart Enno , Gothe Holger , Ihle Peter
Published: December 2021

Liebe Kolleginnen und Kollegen, Liebe Leserinnen und Leser,

vor Ihnen liegt das erste zusammen mit der Hauptschriftleitung von „Das
Gesundheitswesen“ und dem Thieme-Verlag vereinbarte,
regelmäßig ca. halbjährlich erscheinende AGENS-Supplement zu
Methoden und Ergebnissen der Sekundärdatenanalyse. Alle an der Entstehung
dieses Supplements Beteiligten sehen einen hohen Bedarf für ein derartiges
Publikationsmedium, da im deutschsprachigen Raum trotz zunehmender
wissenschaftlicher Nutzung von Sekundärdaten bislang kein spezifisches
Journal existiert, das Sekundärdaten in ihren vielfältigen
Ausprägungen und spezifischen methodischen Herausforderungen explizit zum
Gegenstand hat. Somit stellt das regelmäßige AGENS-Supplement den
Versuch dar, diese Lücke in der deutschen Fachjournal-Landschaft zu
schließen. Die zahlreichen Projekte des Innovationsfonds des Gemeinsamen
Bundesausschusses sind nur ein Beispiel für ein Nutzungsfeld, aus dem heraus
in den nächsten Jahren viele wissenschaftliche Beiträge für
dieses Supplement entstehen dürften. Hinzu kommt der beginnende Aufbau eines
Forschungsdatenzentrums Gesundheit im Zuge der Novellierung des §303a-f SGB
V und der Datentransparenzverordnung (DaTraV; siehe Beitrag in diesem Heft), der
eine zunehmende Nutzung der GKV-Abrechnungsdaten in den nächsten Jahren
erwarten lässt.
Anatomic Reconstruction of the Triangular Fibrocartilage Complex for the Treatment of Chronic Instability of the Distal Radioulnar Joint. A Systematic Review
Authors: Miranda Ignacio , Lucas Francisco J. , Carratalá Vicente , Ferràs-Tarragó Joan , Miranda Francisco J.
Published: December 2021

Introduction Peripheral injuries of the triangular fibrocartilage complex (TFCC) can produce pain and instability of the distal radioulnar joint (DRUJ). There are several techniques for the reconstruction of the TFCC. The aim of the present paper was to summarize the tendon plasties of the DRUJ ligaments for the anatomic reconstruction of TFCC, to analyze the surgical techniques, and to evaluate their outcomes.

Methods In order to perform a systematic review, we searched in the literature the terms DRUJ instability OR chronic distal radioulnar joint instability OR distal radioulnar tendon plasty.

Results In total, 11 articles with level of evidence IV (case series) were retrieved. Most studies achieved good results, with recovery of wrist stability, improvement of the pain, and increase in grip strength in the functionality tests. In the historical evolution of the published series, wrist surgeons tried to perform a more anatomical plasty, with a more stable fixation and less invasive techniques.

Conclusion The Adams procedure continues to be a valid and reproducible technique for the treatment of chronic DRUJ instability. If wrist arthroscopy and implants are available and surgeons have been technically trained, the authors recommend an arthroscopy-assisted technique, or, if possible, an all-arthroscopic TFCC reconstruction with implant fixation of the plasty in its anatomical points of insertion. Comparative studies between open and arthroscopic TFCC reconstruction techniques are needed.
Pulmonary Embolism in Patients with COVID-19: Comparison between Different Care Settings
Authors: Buso Giacomo , Mazzolai Lucia , Rueda-Camino José Antonio , Fernández-Capitán Carmen , Jiménez David , Bikdeli Behnood , Lobo José Luis , Fernández-Reyes José Luis , Ciammaichella Maurizio , Monreal Manuel ,   the RIETE Investigators
Published: December 2021

The clinical characteristics and outcomes of patients with coronavirus disease 2019 (COVID-19) who develop pulmonary embolism (PE) in the full spectrum of patient care settings need to be elucidated. The aim of this study was to compare the clinical characteristics, treatment, and 90-day outcomes in patients diagnosed with PE while recovering from COVID-19 in the outpatient setting versus those who were diagnosed with PE while being hospitalized with COVID-19. Data from the international Registro Informatizado de Enfermedad TromboEmbólica (RIETE) registry were used. The major study outcomes were all-cause death, major bleeding, and venous thromboembolism (VTE) recurrences during the first 90 days after PE. From March 2020 to March 2021, 737 patients with COVID-19 experienced acute PE. Of these, 340 (46%) were recovering from COVID-19 as outpatients (267 patients who had been treated at home for COVID-19 and 73 discharged after being hospitalized with COVID-19). Compared with inpatients with COVID-19, those recovering in the outpatient setting upon PE were less likely to be men (odds ratio [OR]: 0.54; 95% confidence interval [CI]: 0.40–0.72) and less likely to have hypertension (OR: 0.55; 95% CI: 0.41–0.74) or diabetes (OR: 0.51; 95% CI: 0.33–0.76). At 90-day follow-up, eight patients (none recovering from COVID-19 as outpatient vs. 2.4% of inpatients with COVID-19) developed recurrent VTE, 34 (1.9 vs. 7.9%) had major bleeding, and 128 (10 vs. 24%) died. On multivariable analysis, inpatients with COVID-19 were at a higher risk of major bleeding (adjusted hazard ratio [HR]: 6.80; 95% CI: 1.52–30.4) or death (adjusted HR: 2.24; 95% CI: 1.40–3.58). In conclusion, using a large multinational registry of patients with COVID-19 who experienced PE, thromboembolic episodes occurring in those recovering from COVID-19 as outpatients were associated with less ominous outcomes than inpatients with COVID-19.
Thermo-electro-mechanical synergistic effect on the actuation performance of piezoelectric stack
Authors: Li Yang , Xiang Xinjian , Fei Zhengshun , Huang Bingqiang , Zheng Yongping , Zhang Senlin , Shen Xing
Published: December 2021

In a low-temperature environment, the actuation performance of the piezoelectric stack results from the synergic action of the thermo-electro-mechanical field; the actuation performance is influenced by the change in temperature, compressive preload, and excitation voltage. A special and novel instrumentation system is proposed and developed in this study to measure the relationship between the actuation performance of the piezoelectric stack and the change in temperature, preload, and voltage. The bending strain of the cantilever beam driven by the piezoelectric stack reflects its actuation performance, and the corresponding theoretical model is established to optimize the experimental conditions and maximize the strain and signal-to-noise ratio. Based on the experimental results, it can be seen that the actuation performance of the piezoelectric stack increases linearly with the excitation voltage under different temperatures and preload conditions. The static actuation performance increased by 79%–90% when the prestress increased from 0 to 6 MPa, corresponding to a decrease of 15%–30% when the temperature decreased from 20 to −70 °C, and the dynamic actuation performance decreased with an increase in the frequency of the excitation voltage. Consequently, the design methods and ideas are informative to develop an instrumentation system that can measure the influence of thermo-electro-mechanical synergistic effects on the actuation performance of piezoelectric stacks under different temperatures, preloads, and voltages.
Hamiltonian structure of a gauge-free gyrokinetic Vlasov–Maxwell model
Authors: Brizard Alain J.
Published: December 2021

The Hamiltonian structure of a set of gauge-free gyrokinetic Vlasov–Maxwell equations is presented in terms of a Hamiltonian functional and a gyrokinetic Vlasov–Maxwell bracket. The bracket is used to show that the gyrokinetic angular momentum conservation law can be expressed in Hamiltonian form. The Jacobi property of the gyrokinetic Vlasov–Maxwell bracket is also demonstrated explicitly.
Designability analysis of the dynamics of thin-walled carbon fiber laminated shells based on varying the lay-up angle and number of plies
Authors: Zhang Daqian , Yuan Haochen
Published: December 2021

Finite element software was used to model the scaling dynamics of a composite-laminated shell of a solid rocket motor to investigate the modal frequencies of a thin-walled carbon fiber laminated shell. The accuracy of finite element simulations was verified through modal experiments. The effect of the lay-up angle and number of plies on the modal frequency of thin-walled carbon fiber laminated shells was investigated, and the corresponding empirical equations were determined. The results revealed that at each order, the variation in the modal frequencies of the composite-laminated shells was due to a change in the lay-up angle for a provided ply. The maximum frequency variation reached 276 Hz, and the modal frequencies of the shells changed when the number of layers varied from 5 to 10 when the total wall thickness of the shell remained constant. Furthermore, changes in the lay-up angle resulted in a pronounced effect on the modal frequencies of the shells of all orders. The expected modal frequencies and vibration patterns of laminated shells of thin-walled carbon fibers were obtained by varying the lay-up angle with the number of layers.
Are there opportunities to improve lamb feedlot production efficiency? A cross-sectional survey
Authors: Keogh T. P. , McGrath S. R. , Oddy V. H. , Hernandez-Jover M. , Dickson H. , Allworth M. B.
Published: December 2021

Context Feedlotting lambs has the potential to considerably increase the efficiency of lamb production in Australia. Many producers have turned to grain-finishing lambs to capitalise on high lamb prices and, due to the perceived profitability of this practice, further research to improve production has not been prioritised. Lambs are, however, difficult to adapt to a predominantly grain-based diet, often resulting in highly variable feed intake and growth rates. Aims The aim of this survey was to investigate the apparent growth rates and feed conversion ratios of lambs in current feedlotting enterprises. A secondary aim was to identify research priorities that could improve feedlot production efficiency. Methods A cross-sectional survey was conducted between February and May 2020 among Australian lamb producers, with the target population being lamb producers using feedlots to finish lambs. Producer responses from 59 current lamb feedlotters were collated and analysed. Key results The most frequently reported growth rates were between 300 and 350 g/day, and most respondents reported a feed conversion ratio of 5:1. The incidence of shy feeders was a median of 3.5% and mortality was a median of 1%, with acidosis reported as the major contributor to mortality. Conclusions The results of the current survey indicate that for the majority of responding producers, lamb growth rates and feed conversion ratios are consistent with those predicted by the nutrient requirements of domesticated ruminants (CSIRO 2007), and improvements in production are unlikely without significantly increasing nutrient intake. Shy feeders, acidosis and the intake of lowly digestible feeds are the clear limitations to production efficiency. Implications Research to improve productivity of lambs in feedlots needs to prioritise the implementation of feeding strategies that minimise social and nutritional issues, and promote maximum intake of nutrients.
Palimpsests of plague
Authors: Inglis David
Published: December 2021

This paper examines aspects of how language, translations, narratives, and plagues have been in interplay in the
past, with a view to setting out some possible lessons for today. It looks at two types of practices. First, when people make
plague-related translations of texts with religious or medical content from one language to another, producing and reproducing
texts that enjoy certain forms of persisting authority in guiding thought and practice related to handling and making sense of
major disease outbreaks. Second, when people turn plague phenomena into narratives with story arcs, narratives which can endure
over time and shape subsequent understandings of later outbreaks. Despite more complexity and multiplicity in social
configurations and communications today, many of the phenomena concerning translation and narration that have happened in plague
scenarios of the past have again played out during the Covid-19 pandemic, albeit with distinctive modern colourings.
An Interpretation of the Genetic Polymorphism and Population Genetic Background of Ankang Han Population via a Novel InDel Panel
Authors: Cui Wei , Jin Xiaoye , Fang Yating , Lan Qiong , Lan Jiangwei , Chen Man , Mei Shuyan , Xie Tong , Zhu Bofeng
Published: December 2021

In this research, genotyping data of 43 InDel loci in 311 Han individuals in Ankang City, Shaanxi Province, China were detected using a self-developed five-dye multiplex amplification panel. The allelic frequencies and forensic parameters of all InDel loci were calculated. The combined power of discrimination and probability of exclusion values were 0.999 999 999 999 999 998 827 39 and 0.999 887 424, respectively, which demonstrated that this 43-InDel panel was powerful for individual identifications in Ankang Han population. Moreover, genetic distances, pairwise FST values, principal component analyses, phylogenetic trees and STRUCTURE analyses were performed to investigate the genetic affinities between Ankang Han and reference groups. Population genetic investigations indicated that Ankang Han population had a close genetic relationship with Southern Han population compared with other reference groups.
Worms find PEZO-1’s function easy to swallow
Authors: Short Ben
Published: December 2021

JGP study finds that the C. elegans orthologue of the PIEZO family is a mechanosensitive ion channel that regulates pharyngeal pumping and food sensation.
Design and Analysis of Road Load Detection Machine Based on Computer Technology
Authors: Li Shuo , Zhao Yan , Lin Weiguo , Su Ming
Published: December 2021

In this paper, an experimental device is designed for measuring vehicle dynamic load, the structure and stress of the equipment are analyzed by computer technology. The device design mainly includes vehicle, road surface, vehicle transmission, and control [1]. The vehicle is designed based on a 2-DOF vehicle model, the road is designed based on the Pasternak foundation model, and the control mainly uses a single-chip microcomputer. The dynamic response of vehicles to the road at different speeds is analyzed through the experiment [2].
Mobile Robot Computer Simulation System
Authors: Ma Dayong , Xu Xin , Wang Huqun , Li Anzhuo
Published: December 2021

The constant development of science and technology, mobile simulation robot become one of the people of tea after a meal, want the simulation robot to human operation level, premise condition clearly understand the principle of the simulation robot, and the mobile robot simulation system the required functionality, and after understanding we should how to realize the function of them. In this paper, the principle, function and realization of the mobile robot simulation system are designed.
MATLAB Simulation of Current-Carrying Friction between Catenary and Bow Net Of High-Speed Train under Fluctuating Load
Authors: Wang Ruyu , Zhang Zhiguo
Published: December 2021

The current carrying capacity of pantograph-catenary will also change dynamically with the continuous change of train speed. The influence of internal and external parameters such as running speed, current, pressure and vibration must be fully considered. Based on this, this paper first analyses the action relationship between CRH pantograph-catenary under fluctuating load, then studies the measurement of current carrying friction between CRH pantograph-catenary under fluctuating load, and finally gives the MATLAB simulation of current carrying friction between pantograph-catenary under fluctuating load.
Artificial Intelligence Technology in Electric Automation Monitoring System of Power Plant
Authors: Yan Tao
Published: December 2021

With the development of large-capacity and high-parameter units, the degree of electrical automation in power plants is becoming more and more important. Due to the relatively backward technology of traditional electrical monitoring, it is more human monitoring, and the level of automation is low. Nowadays, communication network technology has been rapidly developed, and machinery and equipment have become more intelligent. These have laid a good technical foundation for the reform and innovation of electrical automation monitoring systems in power plants. This article first studies the development status of the electrical automation monitoring system, and then uses the fieldbus and Ethernet technology to carry out the configuration mode and construction of the electrical automation system. Then, this article designs the basic functions, advanced application functions and software parts of the system. Finally, this paper tests the running time and update function of the system dynamic module. The test result shows that the running time of the dynamic module meets the requirements of the system, and the update function is relatively fast.
Electric Power Material Logistics Distribution Based on Improved Multi-Population Particle Swarms
Authors: Wang Jie
Published: December 2021

In view of the problem that the information requirements of electric power supplies logistics distribution are increasingly high, this study proposes the research of electric power supplies logistics distribution based on improved multi-population particle swarm. Firstly, the simulated annealing algorithm is introduced in detail, and then the particle swarm optimization (PSO) is improved by using the domain extension method. Then the multi-population particle swarm optimization was carried out through the optimization of coding system, the updating speed formula and the algorithm convergence control. Finally, the optimization effect was verified. Final results show that, this study put forward based on improved particle swarm more population of electricity supplies logistics distribution model has feasibility and suitability, through the optimized parameters and algorithm of the model, to identify the logistics network of electric power supply company the best optimization model, thus reducing power cost of inventory and logistics distribution time, so as to improve the efficiency of logistics distribution.
Logistics Engineering Simulation Using Computer 3D Modeling Technology
Authors: Liu Dalong , Pan Yanfang , Li Liwei
Published: December 2021

3D modeling technology is an important branch of interdisciplinary fields such as computer graphics, intelligent information processing, computer vision, and artificial intelligence. Through computer digitization, collecting three-dimensional data information of the target object, and then processing and simulation reproduction through computer technology, plays an important role in logistics engineering (LE). The purpose of this paper is the simulation research of LE based on computer three-dimensional modeling technology. This paper takes LE as the research object, firstly elaborates the functional and non-functional requirements of the system separately, and establishes an intelligent logistics system. This paper uses Flexsim simulation software to establish a logistics distribution simulation model. Based on the data collected in the survey, the model is parameterized. Through the data output from the simulation, the simulation data of the original logistics system and the logistics system designed in this paper are compared and analyzed. The simulation output data shows that the total number of products transported in and out of the warehouse of the original system’s 6 transport planes is 15,559, and the total number of products transported in and out of the warehouse of the 6 transport planes in the logistics system proposed in this paper is 17,144 pieces. It can be seen that this system has strong transportation efficiency in LE.
Application of Computer Aided 3D CAD Technology in Mechanical Manufacturing and Automation
Authors: Liu Shufeng
Published: December 2021

With the development of computer-aided technology, the application of computer-aided 3D CAD technology in mechanical manufacturing has become more and more extensive. And it has brought new breakthroughs to the machinery manufacturing industry. This article analyzes the characteristics and functions of 3D CAD technology and its application in mechanical manufacturing design, and it also analyzes the characteristics of mechanical automation control systems. In addition, this article also conducts research on the design of mechanical automation control system.
Mechanical Optimization Design and Automation Application Based on Machine Vision Technology
Authors: Song Yu , Lu Jingui
Published: December 2021

The application of related tech represented by machine vision in mechanical design has gradually deepened, which has greatly ameliorated the automation of mechanical design. Based on this, this paper first analyses the principle and important composition of machine vision tech, then studies the utilization value of machine vision tech in mechanical design, and finally analyses the typical practical utilization of machine vision tech in workpiece detection, workpiece measurement and high-precision measurement in mechanical design.
Frequency Modulation Method and System of Photovoltaic Virtual Synchronous Generator Based on Computer Technology
Authors: Zhang Jiangfeng , Su Ye , Zheng Keke , Hua Liyun
Published: December 2021

With people’s attention to environmental protection, clean energy has become an important research and development direction. Among them, photovoltaic power generation has many advantages, such as simple process, no fuel consumption, no noise, no pollution and so on. The power grid capacity is becoming larger and larger, and has a great impact on the environment. Therefore, the grid connection of photovoltaic power generation will cause major problems for the planning, operation and dispatching of power grid. Virtual synchronous generator (hereinafter referred to as VSG) technology can simulate the inertia, primary frequency regulation and voltage regulation characteristics of synchronous generator, which has become an important way to improve the dynamic frequency response ability of the system. Therefore, VSG technology has become an important research technology of photovoltaic grid connected system, among which FM method will also become an important research direction. Firstly, this paper analyzes the VSG algorithm and its basic characteristics. Finally, this paper analyzes the control scheme of overall primary frequency regulation of photovoltaic power station (hereinafter referred to as PPS).
Intelligent Building Design Based on Internet of Things
Authors: Wu Jiaojiao
Published: December 2021

As an important part of today’s intelligent building engineering, the construction quality of the Internet of Things system automation system largely determines the reliability, security and operation order of the engineering construction. When building the Internet of Things system, the construction personnel must strictly follow the rules and regulations and design scheme, and also strengthen the control and management of field work design, construction material quality, project processes and procedures. Based on the above requirements, combined with the current status of the project, this paper studies and discusses the improvement measures of the construction of intelligent building networking system, hoping to provide reference for the industry [1].
Allocation Control of Multi-functional Grid Connected Inverter and the Power Quality between of Grid Connected Microgrid Based on PSCAD Simulation Platform
Authors: Cheng Yin , Cao Gang , Liu Yaohong , Zhou Yi
Published: December 2021

On the one hand, the application of microgrid can effectively cut down the effect of distributed generation on distribution network, on the other hand, it helps to improve the power quality of distribution network. However, for the distribution network, a single multi-functional inverter has limited effect on the improvement of its power quality. Therefore, the allocation control of power quality by decentralized multi-functional inverters can further improve the utilization of inverters. This paper proposes to calculate the output current of multiple multi-functional inverters according to the harmonic and reactive current of the parallel node and the residual capacity of the multi-functional inverter. The simulation results show that the allocation control strategy proposed in this paper can effectively control the compensation capacity of the multi-functional inverter, so as to control the harmonic at the grid connection in place.
Operation Platform of Charging Pile Metering Equipment Based on Big Data
Authors: Liu Wei , Wang Chaoliang , Zhang Yang , Xiao Tao , Lu Chunguang
Published: December 2021

At present, our country’s new energy industry has developed rapidly with the concept of green development, and at the same time, the demand for charging piles and other equipment is also increasing. However, many new energy vehicles need to pay corresponding fees when using charging piles, resulting in bloated data in the original metering system. Based on this, the purpose of this article is to design and research the operation platform of charging pile metering equipment based on big data. This article first analyzes and studies the current status of charging pile metering, and studies its existing problems and shortcomings in combination with big data technology. The feasibility of the system development and the module functions of the charging pile metering equipment operating platform are studied. This article systematically expounds the three basic algorithms of DC electric energy measurement, and uses comparative analysis method, interdisciplinary method and other research forms to study the content of this article. Experimental research shows that the accuracy of the charging pile metering equipment based on big data studied in this paper is within 0.1, which is extremely feasible.
The control of the height and shape of the track in laser metal deposition by the QCW laser mode
Authors: Rodin P S , Dubrov V D
Published: December 2021

The control of the track shape in laser metal deposition technology by the QCW laser mode has been studied. The different geometric characteristics of the tracks are shown to obtain at the same average laser power, depending on the selected laser power control mode. The difference in the temperature regimes of track formation is shown.
Obtaining and plasma-electrolyte modification of fibers of ultralight magnesium alloy
Authors: Krit B L , Serov M M , Morozova N V , Wu Ruizhi , Medvetskova V M
Published: December 2021

The results of researches for the transformation to fiber state the Mg-8Li-1Al-0.6Ce-0.3Y ultralight magnesium alloy by the Pendant Drop Melt Extraction (PDME), and subsequent modifying obtained fibers by Plasma-Electrolytic Treatment (PET) are presented. The results demonstrate possibility of successful application of the above-mentioned methods in relation to chemically active materials. Purposeful modifying of ultralight magnesium alloys by PDME and PET methods is capable to significantly expand areas of using to these materials.
Rheological properties of powder blend for extrusion of ceramic-polymer filament used in 3D printing
Authors: Smirnov A , Kuznetsova E V , Babushkin N N , Pristinskiy Y O , Solis Pinargote N W
Published: December 2021

The article presents the results of comparative studies of the rheological properties of the ceramic polymer blend of polylactide (PLA) filled with 50 %vol alumina to evaluate the possibility of obtaining extruded filament for 3D printing.