bluuebunny/crossref_metadata_2025_split huggingface dataset:
Risk Assessment Models for Thrombosis and Anticoagulant-Related Bleeding in Ambulatory Cancer Patients
Authors: Candeloro Matteo , Guman Noori A.M. , Kraaijpoel Noémie , Di Nisio Marcello 
Published: June 2021

AbstractCancer patients have a high risk of developing venous thromboembolism and arterial thrombosis, along with an increased risk of anticoagulant-related bleeding with primary and secondary prophylaxis of cancer-associated thrombosis. Decisions on initiation, dosing, and duration of anticoagulant therapy for prevention and treatment of cancer-associated thrombosis are challenging, as clinicians have to balance patients' individual risk of (recurrent) thrombosis against the risk of bleeding complications. For this purpose, several dedicated risk assessment models for venous thromboembolism in cancer patients have been suggested. However, most of these scores perform poorly and have received limited to no validation. For bleeding and arterial thrombosis, no risk scores have been developed specifically for cancer patients, and treatment decisions remain based on clinical gestalt and rough and unstructured estimation of the risks. The aims of this review are to summarize the characteristics and performance of risk assessment scores for (recurrent) venous thromboembolism and discuss available data on risk assessment for bleeding and arterial thrombosis in the cancer population. This summary can help clinicians in daily practice to make a balanced decision when considering the use of risk assessment models for cancer-associated venous thromboembolism. Future research attempts should aim at improving risk assessment for arterial thrombosis and anticoagulant-related bleeding in cancer patients.
The relative order of foci and polarity complementizers
Authors: Callegari Elena 
Published: June 2021

AbstractAccording toRizzi & Bocci’s (2017)suggested hierarchy of the left periphery, fronted foci (FOC) can never precede polarity complementizers (PolC); yet languages like Bulgarian and Macedonian appear to display precisely such an ordering configuration. On the basis of a cross-linguistic comparison of ten Slavic languages, I argue that in the Slavic subgroup the possibility of having a focus precede PolC is dependent on the morphological properties of the complementizer itself: in languages where the order FOC < PolC is acceptable, PolC is a complex morpheme derived through the incorporation of a lower functional head with a higher one. The order FOC < PolC is then derived by giving overt spell-out to the intermediate copy of PolC rather than to the topmost one. In turn, this option is linked to the possibility, recorded in all languages which allow for FOC < PolC, to also realize the morpheme expressing interrogative polarity as an enclitic particle attaching to fronted foci.
Assessment of muscle volume using magnetic resonance imaging (MRI) in football players after hamstring injuries
Authors: Mühlenfeld Nils , Steendahl Ida Bo , Berthold Daniel P. , Meyer Tim , Hauser Thomas , Wagner Nils , Sander Anna‐Lena , Marzi Ingo , Kaltenbach Benjamin , Yel Ibrahim , Vogl Thomas , Eichler Katrin 
Published: June 2021

ABSTRACTMuscle injuries of the hamstrings are among the most frequent in football and a main cause for significant time away from training and competition. The purpose of this study was to prospectively evaluate the loss of muscle volume in recreational football players three and six weeks after initial trauma. We hypothesized that significant muscle volume loss occurs within 6 weeks after the initial injury event. Twenty recreational football players (mean‐age=25 ± 4years; mean‐height=181 ± 8cm; mean‐weight=81 ± 10kg) with type3a (minor partial muscle tear) and type3b (moderate partial muscle tear) injuries were included. Muscle volume was determined using established methods for the hamstrings and the quadriceps femoris muscle within 3 days and after 3 and 6 weeks following the initial injury. The injured hamstrings lost 6.5% (mean=64 cm3(95%CI=31–98 cm3), p<0.001), the healthy hamstrings lost 2.1% (mean=21 cm3(3–44 cm3),p=0.096) of muscle volume after six weeks. The quadriceps in the injured leg lost 3.8% (mean=78 cm3(51–104 cm3), p<0.001) and 4.5% (83 cm3 (45–121 cm3), p<0.001) in the healthy leg. Muscle volume loss inversely correlated with activity levels in the healthy leg for the quadriceps (r=0.96 (0.90–0.98); R 2=0.92; p<0.001) and the hamstrings (r=0.72 (0.40–0.88); R 2=0.51; p<0.001), as well as the quadriceps in the injured leg (r=0.70 (0.37–0.87); R 2=0.49; p<0.001), but not the injured hamstrings. Muscle volume ratio of hamstrings to quadriceps in the control limb was 0.52 ± 0.06 and 0.53 ± 0.06 in the injured leg. The rehabilitation period of six weeks did not have a relevant negative or a positive effect on ratios. Significant muscle volume loss in the upper thigh occurs in recreational soccer players within three, and within six weeks after a hamstring injury and lies between 2% and 7%.
Tip-induced
β
-hydrogen dissociation in an alkyl group bound on Si(001)
Authors: Adamkiewicz A , Bohamud T , Reutzel M , Höfer U , Dürr M 
Published: June 2021

Abstract
Atomic-scale chemical modification of surface-adsorbed ethyl groups on Si(001) was induced and studied by means of scanning tunneling microscopy. Tunneling at sample bias >+1.5 V leads to tip-induced C–H cleavage of a β-hydrogen of the covalently bound ethyl configuration. The reaction is characterized by the formation of an additional Si–H and a Si–C bond. The reaction probability shows a linear dependence on the tunneling current at 300 K; the reaction is largely suppressed at 50 K. The observed tip-induced surface reaction at room temperature is thus attributed to a one-electron excitation in combination with thermal activation.
3.3 kV 4H-SiC DMOSFET with a source-contacted dummy gate for high-frequency applications
Authors: Cha Kyuhyun , Kim Kwangsoo 
Published: June 2021

Abstract
In this paper, a 4H-SiC DMOSFET with a source-contacted dummy gate (DG-MOSFET) is proposed and analyzed through Sentaurus TCAD and PSIM simulations. The source-contacted MOS structure forms fewer depletion regions than the PN junction. Therefore, the overlapping region between the gate and the drain can be significantly reduced while limiting R
ON degradation. As a result, the DG-MOSFET offers an improved high-frequency figure of merit (HF-FOM) over the conventional DMOSFET (C-MOSFET) and central-implant MOSFET (CI-MOSFET). The HF-FOM (R
ON×Q
GD) of the DG-MOSFET was improved by 59.2% and 22.2% compared with those of the C-MOSFET and CI-MOSFET, respectively. In a double-pulse test, the DG-MOSFET could save total power losses of 53.4% and 5.51%, respectively. Moreover, in a power circuit simulation, the switching power loss was reduced by 61.9% and 12.7% in a buck converter and 61% and 9.6% in a boost converter.
Experimental study on scour characteristics of the sheet-pile groin
Authors: Yang Yuanping , Zhang Zhiyong , He Kun , Chen Gang 
Published: June 2021

Abstract
Spur dike is widely used to protect river bank in hydraulic engineering. However, the scour around spur dike caused by narrowing flow is often too deep to induce the failure of dike. In this paper, a new type of spur dike: sheet-pile groin is developed and the scour characteristics around it are studied based on experiment. The experiment results show that, compared with the solid spur dike of the same size, the maximum scour depth near the head of the sheet-pile groin reduces by averagely 30% under the same flow conditions. The sheet-pile groin makes the water flow away from itself and the shoreline. When there is an over-dam flow on the top of the spur dike, the sheet-pile groin has a stronger protective effect on the beach behind it than the solid spur dike does. The scouring and silting features of the local riverbed around the sheet-pile groin benefit the stability of the spur dike and the protection of the coastal beaches.
Study on performance of new type cold mix epoxy asphalt and mixture for steel deck pavement
Authors: Shao Wei-Xian , Zhou Bin-Jie 
Published: June 2021

Abstract
In order to improve the performance of steel bridge deck pavement material, improve the construction efficiency and reduce the cost of steel bridge deck pavement, this paper introduces a new type of cold mixed epoxy asphalt, and studies the mechanical properties and curing law of the material through Marshall test. The results show that it has good mechanical properties, and the curing days at room temperature are 2-3 days. Based on the test data, compared with the United States and Japan, this paper analyzes the remarkable characteristics of the cold mix epoxy asphalt, which has the advantages of normal temperature construction, long retention time, good operability, low construction cost, less curing days, early opening of traffic, low material cost and reducing energy consumption. If it is used as the paving material for steel bridge deck, it has a broad application prospect.
Analysis of the influence of key parameters of UHPC-annular reinforcement wet joint
Authors: Shao Changfei , Qin Kaiqiang , Xiao Wei 
Published: June 2021

Abstract
Based on the connection line reconstruction project of Shanghai Road High-speed Railway Station in Suqian City, this paper carried out the impact analysis of the key parameters of UHPC-circular steel bar wet joints, including the influence of steel bar arrangement spacing, steel bar diameter, and wet joint width on the mechanical properties of the joints. From the research results, the steel bar diameter, the steel bar spacing and the width of the wet joint have an impact on the load-bearing capacity performance and normal use performance of the joint structure, but the degree and regularity of the impact are not consistent, and the reinforcement ratio increases. Larger and the increase of the width of the wet joint has a more obvious contribution to the improvement of the ultimate state of the load-bearing capacity of the UHPC-annular steel wet joint, but it has a small impact on the normal use performance. Therefore, the actual design should proceed from the actual project, comprehensively consider the carrying capacity and normal use requirements and rationally design each parameter.
Preparation and Performance Evaluation of an Environmentally Friendly Lubricant for Water-based Drilling fluid
Authors: Shan Kai , Qiu Zhengsong , Zhang Wei , Zhong Hanyi , Zhao Xin , Di Mingli , Mo Jian 
Published: June 2021

Abstract
With the increasing difficulty of exploration and development of oil and gas resources, the problems of high friction torque in long horizontal well section and high temperature in deep well are increasingly prominent, which put forward higher technical requirements for the lubricity, temperature resistance and environmental protection of drilling fluid lubricant. Traditional drilling fluid lubricants are difficult to meet the above technical requirements. Based on the optimization of modified vegetable oil, extreme pressure agent, surfactant, antioxidant and preparation conditions, an environmentally friendly drilling fluid lubricant SDGL-2 was developed. The evaluation results show that the lubricant SDGL-2 has fluorescence grade of 1~2, temperature resistance of 160 °C, good biodegradability and no toxicity. Its lubricity is better than that of common drilling fluid lubricants, and it is compatible with several common drilling fluids.
Study on the effect of fineness and dosage of fly ash on mechanical properties of concrete
Authors: Wang Qun 
Published: June 2021

Abstract
Ultrafine fly ash concrete is one of the main directions for the development of concrete materials in the future. In order to study the mechanical properties of ultra-fine fly ash concrete, the compressive strength, splitting tensile strength and flexural strength of concrete under different ages and different ultra-fine fly ash particle sizes and dosages were tested. (1) The slump of concrete mix under different fly ash particle size increases with the increase of ultrafine fly ash content, but the rate of increase decreases gradually. Under the same fly ash content, the smaller the particle size of ultrafine fly ash particles, the greater the slump of the corresponding fly ash concrete, and it has the exponential relationship between the particle size and the particle size of fly ash. (2) The smaller the particle size of ultra-fine fly ash, the larger the optimum dosage in concrete. When the particle size of ultrafine fly ash is less than 5μm, the optimal dosage of ultrafine fly ash in concrete is 30% to ensure 60d compressive strength. (3) When the concrete curing age is 60d, the splitting tensile strength and flexural strength of ultra-fine fly ash concrete under different particle sizes increase first and then decrease with the increase of ultrafine fly ash content. The law of variation is that the split tensile strength and flexural strength of fly ash concrete are the highest when the content of ultrafine fly ash is 20%-30%.
Experimental study on performance of fiber concrete under simulated acid rain environment
Authors: Ma Anjing , Li Zhenshu , Feng Xiangrui 
Published: June 2021

Abstract
This experiment studies the influence of different fiber content on the mechanical properties of concrete under simulated acid rain environment (pH=2.5) in the laboratory. Under the action of acid rain erosion, the total content of carbon fiber and basalt fiber are respectively 0.1%, 0.2%, and 0.3%, of which carbon fiber and basalt fiber each account for 50% of the total content. The experiment adopts the cycle immersion method to study the laboratory to simulate acid rain to accelerate the corrosion of concrete. After simulating acid rain corrosion for 25 days, it is naturally dried for 5 days. The compressive strength and splitting tensile strength are measured. The comparison shows that when the total fiber content is 0.2%, the concrete the tensile-compression ratio of the test block is the largest, and its splitting tensile strength increases by 15.09% as the maximum.
Finite element analysis of mechanics performance for GFRP beam-column joints connected by angle steel with slotted-hole
Authors: Wang Yan , Xiao Xiao , Yin Xiangdong , Fang Yaochu 
Published: June 2021

Abstract
In this paper, a group of GFRP beam-column joints connected with slotted-hole angle steel were analysed under monotonic loading. Based on ABAQUS software, the nonlinear finite element analysis of slotted-hole on beam for GFRP joint and influence of different slotted-hole lengths on mechanical properties of joints were carried out. Considering influence of friction and pretightening force, a conventional circular hole specimen C1 and three specimens K2, K3 and K4 with slotted-hole lengths of 2mm, 4mm and 6mm were designed. The universal contact element and pretension element were applied on ABAQUS finite element modeling of bolted connections. Finally, differences in failure mode, moment-rotation curve, rotational capacity, displacement ductility coefficient and other aspects between angle steel joints with conventional round holes and those with different slotted-hole sizes were compared. The results show that: 1) the rotational capacity of slotted-hole joints was about 6%-19% higher than that of ordinary round-hole joints. The longer the slotted-hole length is, the larger the plastic rotation angle steel will be. However, too large slotted-hole size will also cause excessive deformation of components and collapse.2) The slotted-hole method will not increase bearing capacity of joints, but displacement ductility coefficient of joint K4 with slotted-hole size of 6mm was 1.17 times that of conventional joint C1 with circular hole.
Basic test of mix proportion of foamed concrete with aluminum powder as foaming agent
Authors: Zhou Yueyang , Jin Guangri 
Published: June 2021

Abstract
In this paper, the method of producing bubbles by the reaction of aluminum powder and sodium hydroxide is used to make foam concrete test blocks and test their expansion rate and compressive strength. The foamed concrete was made through experiments of controlling the amount of cement, water and the relative content of aluminum powder, and the best mix ratio was selected from the comparative analysis of the compressive strength of 7d, 14d and 28dconcrete. Experimental results: The amount of cement and the water-cement ratio and the relative content of aluminum powder have a significant impact on the compressive strength and expansion rate. Conclusion: Starting from the ratio of the relative content of aluminum powder in foamed concrete to the amount of cement, the analysis of compressive strength and expansion rate provides a theoretical basis for the future study of its mix ratio, which greatly shortens the test time and saves costs.
Comprehensive evaluation system of transmission tower foundation safety
Authors: Wang Hanxiao , Tu Zhibin , Yao Jianfeng , Ding Mengjiao , Lu Bin , Chen Siyu 
Published: June 2021

Abstract
With the expansion of power grid construction scale, the upgrading of transmission current level and the innovation of current transmission technology, we are forced to pay close attention to the safety management of transmission projects, which is very important for social security and development. As an important part of the power grid, the stability and security of the transmission tower are closely related to the safe operation of the whole power grid. Therefore, the construction and maintenance of transmission towers need a set of scientific, quantitative and systematic safety evaluation methods. This paper will sort out the influencing factors that affect the safety of transmission towers, and then introduce a variety of mathematical models and methods to establish a perfect safety evaluation system.
UHPC-Annular Reinforcement Wet Joint Performance Analysis and Concrete Strength Influence Research
Authors: Zhang Jun , Qin Kaiqiang , Liu Jianhui , Ge Haifang 
Published: June 2021

Abstract
Based on the Shanghai Road High-speed Railway Station Connection Line Reconstruction Project in Suqian City, this paper firstly introduces the broad application and development prospects of prefabricated small and medium-span bridges, and explains the purpose of this paper; secondly, it introduces UHPC-ring steel bar wet, the structural form of the joint, and the elastoplastic analysis of it, and the comparison of the original plan and the UHPC-ring steel wet joint plan; finally, the law of the influence of the strength of the joint concrete on the wet joint performance is carried out. the study. The research results show that: UHPC-annular steel bar wet joint has good mechanical properties. As the strength of post-poured concrete at the joint increases, the ultimate bearing capacity of the structure, the bearing capacity of the steel bar when it yields, and the bearing capacity when cracking are all increased accordingly. The change in the bearing capacity corresponding to cracking is the most obvious, and the increase in the yield strength and ultimate bearing capacity of the steel bar is not very obvious.
Influence of Transmission Lines on Dynamic Characteristics of Transmission Tower
Authors: Hu Qilong , Zhang Heng , Chen Xudong 
Published: June 2021

Abstract
The influence of transmission lines on dynamic characteristics of transmission tower should not be ignored due to the heavy quality of transmission lines. The finite element models of independent tower and transmission tower-line system are established by ANSYS. The modal analysis is carried out to study the influence of transmission lines on dynamic characteristics of transmission tower. Meanwhile, it is verified by experimental modal analysis. Results show that, the tower-line coupling effect has a great influence on dynamic characteristics of transmission tower. The coupling effect strengthens the vibration intensity. In terms of frequencies, it mainly affects longitudinal bending mode and torsional mode frequencies of transmission tower, but has little effect on transverse bending mode frequency. Therefore, the influence of tower-line coupling effect must be considered in vibration reduction design of transmission tower-line system.
A comparable study on the deterioration of concrete under sodium sulfate and magnesium sulfate attack
Authors: Wu Jiang , Zhu Wen , Wei Jiangxiong , Tang Mengxiong , Zhang Shuo , Zhang Xianyuan 
Published: June 2021

Abstract
The deterioration mechanisms and corrosion of concrete exposed to Na2SO4 and MgSO4 solution were investigated in the present study. The damage of concrete specimen was evaluated by multi-scale observation, change of mass and relative dynamic modulus. Quantitatively analyse of the compositions for corrosion products during sulfate attack was applied in this study. The concrete was mainly cracked and spalling at the edges and corners when immersed in sodium sulfate solution. But pitting corrosion was formed on the surface of concrete under magnesium sulfate attack, and the powder peels off into a honeycomb hollow structure.
Start-up of Anammox and Effect of Fe2+ on Nitrogen Removal Rate
Authors: Wang Bing , Sun Bing , Liu Yunlong , Yang Lin 
Published: June 2021

Abstract
Anammox reaction was started by inoculating sewage plant digested sludge, and the change of N element in the reactor was detected. It was found that Anammox needed to go through three parts: hydrolysis period, activity lag period and activity increase period. The effect of different Fe2+ concentrations on the denitrification rate was investigated with the well-run Anammox sludge as the inoculation sludge. The results showed that Fe2+ had a positive effect on the anaerobic ammonium oxidation reaction within a certain concentration range, while the denitrification effect would be inhibited if the concentration was too high. When the concentration of Fe2+ was 0.08mmol/L, Fe2+ on Anammox had the best denitrification effect.
Performance analysis of steel slag powder-coal gangue grouting material
Authors: Lin Yuezhong , Wang Qingjiang , Wu Changsheng , Wang Chuanwei 
Published: June 2021

Abstract
In this paper, coal gangue soil, steel slag powder and polycarboxylic acid superplasticizer with different dosages were combined into ordinary Portland cement. Grouting solution was prepared according to different water-cement ratios and solidified under standard conditions. Through orthogonal experiments, the influence of different dosages on the rate of grout stones and the compressive strength of stones in different ages was studied. The experimental results show that the increase in the amount of coal gangue will lead to the decrease of the slurry stone first and then increase, and the compressive strength will decrease. The increase in the amount of steel slag powder reduces the stone rate and compressive strength of the slurry.
Research on Adaptive Power Transmission Line Fault Inspection
Authors: Wu Jian , Shao Shuang , Jiang Dongping , Yao Hongfang , Ma Caiguo , Xu Kekui 
Published: June 2021

Abstract
Power transmission line is one of the most important infrastructures of power system, and its safety monitoring is of great significance. The conventional way of fault monitoring of power transmission lines by only setting threshold value on single temperature data of strain clamp turned out to multiple misjudgements and delayed alarms, causing the increment of operation risk of power transmission line. In this paper, various types of time-varying sensors data such as strain clamp temperature data, environmental data, and cable ampacity data are accounted. Also, an unsupervised machine learning algorithm - K-means clustering algorithm was introduced to build a discriminant model in detecting the defects of power transmission line. Experimental results proved that the proposed method is able to avoid delayed alarms as well as misjudgement incurred from conventional method. As a result, the operation safety of power transmission line and inspection efficiency can be improved. The inspection cost would be reduced as well.