bluuebunny/crossref_metadata_2025 huggingface dataset:
COWI Experiences in Chinese Mega Bridge Projects – Danish Way and Chinese Way
Authors: Zhang Jinping , Marcussen Jens B. , Sørensen Jesper W. , Jamal Assad
Published: November 2022

From 20th century, infrastructure in China has experienced rapid development, especially in mega cable supported bridges. COWI had the honour and opportunity to participate in some of the prestigious mega bridge/sea crossing projects, and thus gained in-depth knowledge in the bridge design following Chinese traditions. The mutual corporation on these projects between COWI and the Chinese designers as well as Chinese project owners has closed the knowledge gap of design and construction methods by Chinese tradition and Danish tradition, and also enhanced the technical development and know-how of modern bridge design.

In this paper, some of the challenging issues for mega suspension bridges are presented, where the Chinese way and Danish way in addressing aerodynamic flutter stability, design of hanger system, and anchor block & foundation are described and discussed.
Challenges in Design and Construction of WONJU 404 SKYBRIDGE in Korea
Authors: Shin Sang-Hun , Koo Gi-Jung , Ryu Jung-Soo , An Jeong-Kyoon
Published: November 2022

Installed in Ganhyun Park, Wonju-si, South Korea, the 404 Skybridge is the longest pedestrian bridge in Korea, planned as a three-dimensional cable suspension bridge with a main span length of 380m. The location of the installation lies about 100m above from the ground level, on a slope of the mountain which presents very difficult construction condition.

The three-dimensional cable suspension bridge is a challenge to construct but capable to achieve slender girders to have strong horizontal rigidity, without using separate wind resisting cables. By implementing the 3D angle of the cables much larger than the general three-dimensional suspension bridge, the horizontal rigidity of the girders enhanced, and flutter wind speed increased.

At the start of the 404 Skybridge, Skywalk was constructed to provide scenery of the Ganhyun Park.
Thermal Spray Zinc Coatings for Protecting Bridges from Corrosion
Authors: van Leeuwen M. C. , Gagné M. , Lai Delin , Kong Gang , Wang Yanqi
Published: November 2022

Metallic zinc coatings are recognized as environmentally friendly, sustainable, and low maintenance, providing the lowest life cycle cost corrosion protection. Various case studies illustrate that the corrosion protection of steel bridges with thermal spray zinc (TSZ) duplex coating are very good in the environmental corrosivity of class 4 or 5 without any maintenance for a long time. Meanwhile, TSZ coatings on the exposed surface of the concrete of reinforced concrete structures can be electrically connected to the steel reinforcement and provide corrosion protection to the steel. The lives of iconic bridges have been successfully extended by using TSZ coatings for use as anodes in ICCP systems.
Numerical Simulation of Overall Marine Transportation of Bay Bridges under Complex Hydrographic Environment
Authors: Fang Yu , Xiong Wen , Kan Jun , Liu Hailong
Published: November 2022

Although more and more research achievements have been obtained in offshore engineering in recent years, there are few studies on transportation of bridge under marine condition. In order to explore the response characteristics of bridge transportation under the action of marine environment, this paper conducts numerical simulation of the transportation of a butterfly arch bridge by a semi-submersible barge. In this paper, the software based on potential theory has been used to analyze the swing motion of the transportation of bridge. The motion response of the combined float has been calculated under the action of wind, waves and currents with the varying of frequencies and directions. The results show that the swing motion amplitude of the combined float in the condition determined by the local code is relatively small, and the action of waves are the main factor of the swing motion compared to wind and currents.
Design and Construction of the West Kowloon Cultural District Artist Square Arch Footbridge
Authors: Tien Chong Alecs Kak , Tapley Mike , Jenkins Steven , Chandler Thomas
Published: November 2022

The West Kowloon Cultural District Artist Square Bridge (ASB) is a part of Hong Kong’s new art and cultural district development. It forms a primary pedestrian link between the adjacent MTR station and the new development. ASB is a design-and-build project consisting of a 78m clear spanning, 8m wide footbridge, an access lift tower and a 30m long staircase and escalators. The footbridge is a covered, dual steel arch and Vierendeel truss footbridge, that crosses an existing flyover, connecting the station shopping mall to the new development. During construction of ASB, very limited space was available on the new development site to accommodate the construction of ASB. These posed engineering challenges to the design and construction team. This paper presents the design of the ASB structures with particular focus on the main footbridge, and the challenges encountered during the design and construction of ASB and how incremental launching solution was developed to tackle these challenges.
Design and Overall Mechanical Characteristics Analysis of Hybrid Composite Beam Single Tower Cable-Stayed Bridge
Authors: Wu Jianmin , Liu Zhiquan , Yin Chao
Published: November 2022

Composite beam bridges have been widely used in the main girders of cable-stayed bridges for their excellent performance. In order to study how to apply steel concrete composite girders and concrete π girders in single-tower cable-stayed bridges, the study explores the design technology of hybrid composite beam single-tower cable-stayed bridges based on Shouying Huaihe River Spe- cial Bridge of Hezhou Expressway. Through finite element analysis, a series of parametric analysis of the overall performance of the hybrid composite beam single-tower cable-stayed bridge is car- ried out to study the structural characteristics and analyze the rationality and economy of the structure. The result shows that the hybrid composite beam is a kind of single-tower cable-stayed bridge structure that can well adapt to the asymmetric span distribution with a large proportion of side and middle spans. The research results can provide support and guidance for the background engineering construction and help promote the application of the structural form.
Semi-active Control of Cable Vibration Using MR Damper under Wind Loads
Authors: Huang Hongwei , Liu Tingting , Sun Limin
Published: November 2022

One of the most effective countermeasures for mitigating cable vibration is to install mechanical dampers near the anchorage of the cable. The parameters of passive dampers are usually determined based on the optimal damper force obtained from the universal design curve for linear dampers, which is chosen based on a predetermined principle vibration mode. Passive dampers will be most effective if cable undergoes single-mode vibration where the vibration mode is the same as the principle mode used in the design. However, in the actual engineering practice, multi-mode vibrations are often observed for cables. Therefore, it is desirable to have dampers that can suppress different modes of cable vibrations simultaneously. In this paper, MR dampers are proposed for controlling multi-mode cable vibrations, because of its ability to change parameters and its adaptability of active control without inquiring large power resources. Although the highly nonlinear feature of the MR material leads to a relatively complex representation of its mathematical model, effective control strategies can still be derived for suppressing multi-mode cable vibrations based on nonlinear modeling, as proposed in this paper. Firstly, the nonlinear Bouc-wen model is employed to accurately portray the characteristics of the MR damper. Then, the input voltage (current) of MR damper corresponding to the desired optimal damper force is calculated from the nonlinear Bouc-wen model of the damper using a piecewise linear interpolation scheme. Numerical simulations are carried out to validate the effectiveness of the proposed control algorithm for mitigating multi-mode cable vibrations induced by wind load excitations.
Sensitivity-based Structural Damage Identification via Response Reconstruction
Authors: Si Yunan , Sun Limin , Li Yixian
Published: November 2022

The limitation of sensor number and results that the monitored data is difficult to reflect the true state of the structures, which limits the reliability of bridge damage identification and deterioration assessment. There are many full-field response reconstruction methods developed to obtain the complete responses. However, the quality of the reconstructed data is comprehensively affected by finite element model errors, noise interference and strong coupling environmental effects, resulting in the low accuracy of dynamic-based damage indicators. Thus, this paper explores a damage identification method based on static response reconstruction and solve the damage factor using the relationship between the sensitivity matrix and the structural deformation. Taking simply- supported and cantilevered beam as examples, numerical calculations confirm that the method can effectively locate the damage of the structural system.
Research on Identification of Time-Varying Cable Force
Authors: Zhang Junzheng , Shen Ruili
Published: November 2022

Cables have been widely used in the construction of cable-supported bridge due to their light weight and high strength mechanical properties. As the key component of cable supported bridge, real-time monitoring of the time-varying cable force of cable is very important for the construction, operation and maintenance of long-span bridges. Based on the time-frequency analysis method of multisynchrosqueezing transform, a new identification method of time-varying cable force is proposed. First, the theory of time-varying modal parameter identification based on time-frequency analysis method is studied. On this basis, the relationship between the time-varying cable force and the instantaneous natural frequency is obtained. Finally, the accuracy of the proposed method under different conditions is studied. The results show that the proposed time-varying cable force identification method has good accuracy and robustness.
Pixel-level Road Crack Detection and Segmentation Based on Deep Learning
Authors: Deng Lu , Zhang An , Cao Ran
Published: November 2022

This paper proposed an integrated framework for detecting and segmenting road cracks in complex backgrounds. Based on the latest real-time object detection algorithm, YOLOv5l6, a modified U-Net embedded Bottleneck and Attention mechanism modules was developed to segment crack pixels from the detected crack regions. Validation of the proposed approach was conducted based on a total of 150 images, which were taken from different backgrounds, angles, and distances. Based on the computation, the results derived from the YOLOv5l6-based crack detection had a mean average precision of 92%, and the mean intersection of the union of the modified U-Net was 87%, which is at least 11% higher than the original U-Net model. The results showed the integrated approach could be a potential basis for an automated road-condition evaluation scheme for road operation and maintenance.
Quantitative Analysis of the Importance and Correlation of Urban Bridges and Roads in the Study of Road Network Vulnerability
Authors: Huang Hongwei , Xiao Qinghua , Tang Chao
Published: November 2022

The city development is closely related to the performance of the transportation network system. Bridges and roads are important parts of the transportation system, and are also inseparable components of the transportation network. However, the effect of the correlation between bridges and roads on the network system has not been studies thoroughly in the literature. Therefore, it is necessary to analyze the vulnerability of the road network when both bridges and roads are involved. In this paper, the urban road network is modeled into the form of network connection and node, based on the analysis of the related research results of road network vulnerability in the literature. Taking the urban roads at all levels as the connection and the transportation hubs (including bridges) as the nodes, the paper puts forward the corresponding measurement indexes and calculation methods, and establishes the importance and correlation analysis model of roads and bridges in the urban road network.
The Durability and SHM System of Hong Kong-Zhuhai-Macao Bridge
Authors: Su Quanke , Gao Wenbo , Xia Zili , Zhang Jinwen , Zhu Yongling
Published: November 2022

The Hong Kong–Zhuhai–Macao Bridge (HZMB) located at the Pearl River Estuary on the south coast of China, links Hong Kong in the east with Zhuhai-Macao in the west with a total length of 55 km; It is the longest sea-crossing made of artificial island, immersed tunnel and steel bridge in the world, and was opened to traffic in October 2018. The environment where HZMB located is almost the most severe subtropical marine corrosive environments in China, the durability, maintenance and operation are undoubtedly amongst the major work of this project. In the view of the prominence of this bridge, it is a huge challenge for the engineers to achieve this. This paper describes the durability and integrated structure health monitoring system of HZMB.
Seismic Performance Evaluation of an Existing Vertical Irregularity Reinforced Concrete Building using Nonlinear Time-history Analysis
Authors: Buddee Samard
Published: November 2022

On 5th May 2014, the Mw 6,1 Mae Lao earthquake occurred at a depth of approximately 6 km in the northern Thai province of Chiang Rai, which caused extensive damage to the community, and spread to Bangkok, an epicentral distance of 670 km, where tall buildings swayed. This paper evaluates the seismic performance of an existing 26-storey reinforced concrete (RC) building with vertical irregularity located in Bangkok, Thailand. The understanding gained from this evaluation can be used to propose effective control measures for similar existing high-rise RC buildings. As the building was constructed in 1990, the structure no longer meets the new Thai regulation. As a result, the building may have sustained significant damage, and an assessment had to be conducted according to the Thai Ministerial Regulation B.E. 2564 (2021). A seismic safety evaluation was applied by using the nonlinear time-history analysis (NLTHA) which was performed by the software ETABS 18.1.1.
Analytical Study on Slip Strength of Long Bolted Joint Combing with Bearing Type Bolts
Authors: Chen Yu , Yamaguchi Takashi , Yamauchi Motoshi , Ueno Keita
Published: November 2022

In recent years, high-strength bolt friction joints have been becoming larger and longer owing to the increase in load and need for the rationalization of steel members. However, as the length of the joint increases, the force that the bolted joint can resist decreases because the distribution of the bolts inside the joint becomes uneven. The present study proposes a method that improves the slip strength of a long friction bolted joint by combining it with the bearing type joint. Finite element (FE) analysis was conducted to clarify the load share and slip strength of the hybrid joint. From FE analysis result, we found that the slip load/design slip strength ratio of the long friction bolted joint is 0.83, while the ratio of the hybrid joint B2 with bearing type bolts installed at each end of the joint is 0.94 and 0.98 in the B4 case. Therefore, it could be concluded that the hybrid joint with bearing type bolts installed at both ends of the long friction bolted joint can effectively improve its slip strength.
Experimental Study on Simply Supported Bridges of Steel-Concrete Composite Structure Strengthened with Externally Pre-Stressed CFRP Plates
Authors: Shen Yin , Jiang Xu , Qiang Xuhong , Chen Longlong
Published: November 2022

This paper mainly studies the mechanical properties of steel-concrete composite beams reinforced with trapezoidal prestressed un-bonded retrofit (TPUR) system. The prestressing of CFRP plate through the jacking of columns can not only apply the prestressing force to the main beam, but also provide upward lifting force to the bottom of the main beam to reduce the deflection of the original structure. Moreover, the surface treatment of steel beams is not required in the TPUR system, which can improve the speed and efficiency of reinforcement construction. The effects of the amount of CFRP, the prestress level, the height of the pillars and other parameters on the stiffness and bearing capacity of the composite beam are studied through static tests on the scaled model.
Proposal Based on the Social Assessment Methodology for a Scenario in which the Road Network Faces a Bridge Collapse. Case Study: Seminario Bridge, Chile
Authors: Valenzuela Matías A. , Gonrall José M. , Ampuero Javier , Espinoza Bryan
Published: November 2022

In Chile several natural hazards (earthquakes, landslides, etc.) create high road structure vulnerability resulting in road disruption. One of these conditions can be exemplified by the collapse of a road bridge resulting in high human and economic cost.

The current Bridge Management System must provide comprehensive inspection, diagnosis and intervention (strengthening or repair) protocols, always with a limited budget. For that reason, the budget allocated to O&M is usually reduced and has to be technically justified.

A tool to provide adequate decision-making is to know the direct and indirect costs associated with the collapse of the bridge and how this collapse impacts on the funding allocated to management activities.

This paper is a proposal based on the social assessment methodology to quantify the direct and indirect costs of a bridge collapse on a route that is critical for the Chilean road network, following the current social assessment methodology and applying it to a specific bridge. An analysis and comparison of the funding of inspection and monitoring is carried out. This analysis considers visual inspection, UAV, NDT and instrumentation of the bridge.
Analysis of Influencing Factors of Track Static Geometric Deviation of Super-Long-Span HSR Bridge
Authors: Gao Mangmang , Yang Jingjing , Li Guolong , Sun Xianfu , Wang Yunlu , Wang Dongfang
Published: November 2022

Aiming at deformation characteristics of super-span bridge and track in high-speed railway at the acceptance stage, the key factors to track static geometrics are identified, namely the route profile, surrounding temperature, construction deviation and ballast density deviation. According to the study results, the principles of track profile setting is proposed, and the integrated criteria of midpoint chords based on 60 m, 30 m and 10 m is recommended to determine the track target geometric profile. The optimized track adjustment scheme should meet two conditions, first condition is that the irregularity midpoint chord values should not exceed 6 mm/60 m, 3 mm/30 m and 1 mm/10 m, and second condition is that the adjustment range of ballast thickness should be within ( -20 mm~+100 mm).
Design of a bridge digital twin system for Intelligent operation and maintenance based on machine vision
Authors: Ying Guogang , Zhang Chengyang , Hu Jieliang , Chen Weimin , Xing Yapeng , Xu Miao , Xia Ye
Published: November 2022

Under the background of the transformation and upgrading of bridge maintenance management, aiming at the problems of weak processing capacity, low management efficiency and intelligent degree of the bridge operation and maintenance process, this paper proposes a digital twin system solution of bridge intelligent operation and maintenance based on machine vision. Then framework of the bridge digital twin system for Intelligent operation and maintenance is proposed, followed by the realization methods based on machine vision. Finally, a case application of the concrete simply supported girder bridge is given.
Xiong'an Railway Station: A Supersized Railway Station in High Seismic Intensity Zone
Authors: Fan Zhong , Zhang Yu , Zhu Dan , Song Zhiwen , Liu Ming
Published: November 2022

Xiong'an Railway Station is the super-large elevated railway station located in the high seismic intensity zone. The reinforced concrete frame structural system is adopted for the rail-bearing floor and the lower floors, while the steel structural system is adopted for the large span roof. H- shaped steel frame beams are adopted for the elevated waiting hall, while double flange H-shaped steel beams are adopted in the area of great forces. Plane trusses are arranged bi-directionally between the frame beams to facilitate the laying and maintenance of equipment pipelines. The main span of the elevated waiting hall is 78m, and the variable-height box beams are adopted. The platform canopies are supported by special shaped steel pipe columns, and the roof frame beams are connected to the top of columns through spherical bearings. Structural innovations have been carried out in terms of semi-embedded column bases, stepped wall thickness steel pipe columns with special section shape, large-span stiffened thin-walled box beams, and bi-direction large displacement bearings.
Jingang Cultural Center: Complex-shaped Fair-faced Concrete Structure
Authors: Zhang Shiyang , Feng Changzheng , Fan Yaoyao , Xia Ye
Published: November 2022

As one of the largest fair-faced concrete structures in China, the Jingang Cultural Center includes many complex-shaped fair-faced concrete structures. This study focuses on the structural characteristics of Jingang Cultural Center. Aiming at the representative components, such as a deepening design, mushroom body structure, ridge eave structure, and arch-shell structure, a series of measures are studied, and a series of methods are proposed to improve the forming quality of fair-faced concrete with complex-shaped structures and enhance the feasibility and economy of fair-faced concrete in complex-shaped structures.
Study of Aerodynamic Performance on Concrete Deck Section in Stayed Cable Bridge
Authors: Teh Tzyy Wooi , Lim Chun Kiat , Seah Wei Cheng
Published: November 2022

In this study, concrete deck section design is required for a harped shape type stayed cable bridge with total span of 800m with span configuration 200m-400m-200m located at open terrain crossing Sarawak River, East Malaysia. Desktop study are performed on two different type of concrete deck section i.e. monobox section and ladder deck section on their dynamic stability with respect to two mechanisms of divergent amplitude response, galloping and flutter in a stayed cable bridge. From wind climate study of site, the design wind speed for 120 years return period is 40m/s and the aerodynamic stability wind speed at deck level is 52.5m/s. The results show that monobox section is more stable with respect to aerodynamic torsional responses and is selected for deck section for the stayed cable bridge. Section model wind tunnel test was carried out on the selected monobox section, the results show that the section has good flutter and galloping stabilities up to the design wind speed.
Structural System Conception and Overall Design of a Mega Suspension Bridge with Four Main Cables
Authors: Peng Yuan-cheng
Published: November 2022

Hubei Yanji Yangtze River Bridge integrates the functions of expressway and urban road. It adopts the scheme of 1860 m double deck steel truss girder suspension bridge with a single span across navigable waters and fault zones. The bridge is close to the airport, and the height of the tower is limited due to the aviation height limit, so that the sag of the main cable is too small and the scale of the main cable is too large. To solve the above problems, a new suspension bridge structure system with four main cables with different sags is proposed. The main features of this system are: four main cables are symmetrically arranged on two sides, and two main cables on the same side adopt different sags. The truss girders are alternately suspended on two groups of main cables with different sags at intervals, and the main cables with different sags are staggered and anchored to ground anchors in front and back of the longitudinal direction. The new system reduces the scale of a single main cable, and has better wind stability. The midspan of lower main cable on the outside can be lowered below the bridge deck to increase the sag, which better solves the construction problem of the tower height limitation. Based on this system, the upper main cable span of the bridge is (550+1860+450) m, the midspan sag is 142.445 m, the lower main cable span is (510+1860+410) m, and the midspan sag is 153.345 m. The cable of the bridge adopts galvanized-aluminium alloy coated high-strength steel wire, the girder adopts Warren truss, the anchorage adopts replaceable prestressed anchorage system, the tower adopts gatehouse shape, and the foundation adopts bored piles.
Key Construction Technology of Single Tower Suspension Bridge
Authors: Yang Jian , Chen Yinggao , Hu Jing
Published: November 2022

In the process of road network construction in western mountainous areas of China, bridge engineers created a single tower suspension bridge in the face of deep canyon terrain. The main cable on one bank is directly anchored into the mountain, the cable saddle buttress is set in the cable tunnel, and a new type of composite cable saddle is developed, which can meet the stress and deformation requirements of the main cable saddle and splay saddle at the same time. This report takes Lvzhijiang bridge as an example to introduce the key construction technology of single tower suspension bridge.
Structural Form Selection of Nanpanjiang Bridge in Puzhehei
Authors: Hou Xu , Li Yongqing
Published: November 2022

The Nanpanjiang Bridge is a control project for the Luxi- Qiubei-Guangnan-Funing Expressway. It is a cable-stayed bridge adopting steel truss girder and has main span length of 930 m, which is the largest span cable-stayed steel truss girder bridge in mountainous areas under construction all over the world. The height of the main tower is 385 m, which is the tallest bridge tower in the world. Nanpanjiang Bridge is a typical long-span bridge crossing deep valleys in mountains. The construction of the bridge faces the series of harsh factors, such as high altitude of bridge deck, turbulent wind field, strong earthquake, lack of local materials, difficult transportation, and lack of construction space. The paper focuses on the demonstration and selection process of the bridge location, bridge type, scheme of main structure component, like cable, tower, and girder, in the design stage of Puzhehei Nanpanjiang Bridge. The design points and difficulties of extra-large-span bridges in mountainous areas were also analyzed.
FEATURES OF IMAGE STRATEGIES OF LEADERS OF SYSTEMIC POLITICAL PARTIES IN THE MODERN RUSSIA
Authors:   Bunin Yelets State University, Tolochko Aleksandr V. , Fomenko Sergei S. ,   Bunin Yelets State University
Published: November 2022

The article examines the issues associated with the peculiarities of image strategies of leaders of systemic political parties in modern Russia. Particular attention is paid to the statement that elections play a crucial role in any modern state that calls its political regime democratic. The Russian Federation is among the democratic models of the state is the Russian Federation, which constitutionally enshrines electoral procedures for the election of power institutions. At the same time, it is justified that electoral processes can take place in countries with other political regimes, and most often occur in conditions of limited freedom, police pressure, threats to employees from the employer, fear of the population against repressive actions of the state, and so on. Holding elections in such conditions takes on a decorative nature and cannot be recognized as legitimate. The authors suggest that the realization of the possibility of determining popular will depends on many factors, the main of which are the high level of political culture of citizens and a strong civil society capable of protecting its rights. That is why the holding of free, competitive and regular elections is the most important aspect of the socio-political life of the population of democratic countries. They also describe specifics in proclamations of the political organizations leaders, the goals they set to solve issues in the country and society, the creation and manipulation of certain images forming socio-psychological conditions that can shape a certain information space and evoke an emotional response that encourages the voter to electoral action.
La comercialización electrónica y la gestión de ventas en el centro artesanal de muebles de madera “Huambaló” de Tungurahua
Authors: Arcos Naranjo Gissela Alexandra , Galarza Torresano Iván Danilo , Arroba Freire Edison Manuel , Sánchez Pérez Vanessa Elizabeth
Published: November 2022

El presente trabajo investigativo parte de la problemática observada entre los productores de muebles afiliados al Centro Artesanal Humbaló de la provincia de Tungurahua. El objetivo de la investigación fue diagnosticar  el porqué de la reducción de ventas en el sector y orientar a una posible solución. El problema se formuló en la siguiente interrogante ¿Cómo mejorar la gestión de ventas de los productores de muebles del Centro Artesanal Huambaló?. Se fundamento científicamente aspectos como comercialización electrónica y ventas, en aspectos metodológicos se utilizó el paradigma cuantitativo, se aplicó la técnica de la encuesta a una población de 41 afiliados activos, el instrumento asociado fue el cuestionario. Entre los principales resultados se obtuvo que no se usa la tecnología como elemento de apoyo en la gestión de ventas, es por ello que se propuso como solución la implementación del comercio electrónico en el centro, para ello se propone crear una tienda virtual y definir políticas de pago, así como de entrega. De la discusión se dedujo que muchas empresas han tomado este camino que implica realmente tener los dos canales de ventas, el tradicional y el electrónico. Finalmente se llegó a la conclusión que una tienda virtual sirve como medio de promoción que amplía los segmentos de mercado y con ello se espera potencializar las ventas de los emprendedores.
Etapas óptimas de sistemas de captación y almacenamiento de energía de RF
Authors: Cuji Julio , Merino Danny , Brito Geovanni , Gordón Carlos
Published: November 2022

Este documento revisa los modelos de sistemas de captación de energía de Radiofrecuencia (RF) a partir de la información recogida en varios artículos publicados en repositorios científicos de todo el mundo. Tiene como objetivo registrar información relevante de cada uno de ellos, como: topología del sistema, circuitos y características de cada etapa, componentes electrónicos utilizados, dimensiones, entre otros, para tabular y cotejar estos datos, con el fin de determinar cuál es el que presenta mejores características por etapa y así considerarlo para realizar una investigación profunda y mejorar su diseño para captar energía. En este estudio se utilizó una metodología dividida en cuatro fases: investigación, lectura científica, extracción de información relevante y tabulación. Una vez realizado el estudio de los sistemas seleccionados, se compararon los resultados obtenidos en cada uno y se seleccionó la topología, circuitos o elementos que obtuvieron mejores resultados para las etapas: Antena, Acoplamiento, Rectificación, Administración de energía y Almacenamiento de energía. Finalmente, se creó una aplicación para dispositivos Android en la que se encuentra toda la información recolectada y los resultados obtenidos de manera que funcione como una fuente de consulta para futuras investigaciones.
Doğadan Sanata: Akseki Köylerindeki Düğmeli Yapılardan Örnekler
Authors: TAY Lokman
Published: November 2022

Bu çalışmada, Antalya’nın Akseki ilçesinde görülen ve yöreye özgü geleneksel bir inşa tekniği olan “düğmeli duvar” ile inşa edilmiş farklı yapı türlerinden örnekler incelenmiştir. Batı Toros Dağları’nın güney yamacına kurulu olan Akseki, dağlık ve ormanlık bir coğrafyaya sahiptir. Bu sebeple ilçe genelinde inşa malzemesini ağırlıklı olarak ahşap ve moloz taş oluşturmaktadır. Arada bağlayıcı başka bir malzeme olmadan ahşap ve moloz taşın birlikte kullanımı ilk bakışta pek mümkün görünmemektedir. Ancak yöre sakinleri, birbiriyle uyumsuz bu iki malzemeyi olağanüstü bir işçilikle sanata dönüştürmeyi bilmişlerdir. Düğmeli duvar olarak adlandırılan bu sistem, boyuna ve dikine ahşap hatıllarla takviyeli, moloz taş malzemeli kuru yığma duvar olarak tanımlanabilir. Hatılların uçları dışarıya doğru 20-25 cm taşıntı yaptığı için bu teknik yöre halkı tarafından “düğmeli duvar” olarak adlandırılmıştır. Akseki ve çevresinin geleneksel konut mimarisinde genellikle bu duvar örgü sisteminin uygulanması, söz konusu yapıların “düğmeli evler” olarak adlandırılması sonucunu doğurmuştur. Akseki’de yürütülen arazi çalışması sonucunda, geleneksel konut mimarisi dışında dokuz köy odası, altı cami, dört okul, iki değirmen, iki han ve bir medrese olmak üzere altı farklı yapı türünde toplam 24 eserin düğmeli duvar ile inşa edildiği tespit edilmiştir. Ancak çalışmanın asıl amacı düğmeli duvarın yöredeki farklı yapı grupları üzerindeki kullanımına dikkat çekmek olduğu için her bir yapı grubundan birer örnek olmak üzere altı yapı kataloğa dâhil edilmiştir. Diğer 18 yapı ise değerlendirme bölümünde zikredilmiştir. Bununla birlikte düğmeli duvarla inşa edilmiş çok sayıda yapının yıkılarak yerine yenilerinin yapıldığı bilgisine ulaşılmıştır. Günümüze ulaşan yapıların ise çoğunluğu yıkılmaya yüz tutmuştur. Söz konusu yapılar bir an önce geleneksel yöntemlerle aslına uygun şekilde onarılarak koruma altına alınmalıdır.
APOIO AO MATRICIAMENTO EM SAÚDE MENTAL NA ATENÇÃO PRIMÁRIA
Authors: Castro Karen Silva de , Ferreira Michele Pinheiro , Gouveia Amanda Ouriques de , Borges Renata Campos de Sousa
Published: November 2022

Prezados(as) leitores(as), o guia de “Apoio ao Matriciamento em Saúde Mental na Atenção Primária: Abordagem Multiprofissional” consiste em um produto de Dissertação do Trabalho de Conclusão de Curso em Enfermagem, da Universidade do Estado do Pará (UEPA), sob nossa autoria, orientado pela professora mestre Renata Campos de Sousa Borges e co-orientado pela professora mestre Amanda Ouriques de Gouveia. Trata-se de um produto educacional de pesquisa construído a partir dos principais resultados da pesquisa intitulada “Acolhimento Psicológico ao Público Infantojuvenil na Unidade Básica em Tucuruí-PA: Abordagem do Profissional Enfermeiro”. Esta obra tem como finalidade apresentar evidências atualizadas acerca do atendimento em saúde mental de maneira adequada, para crianças e adolescentes, com foco na atuação da equipe multiprofissional, principalmente, no que tange ao matriciamento, assim como, o acolhimento e escuta qualificada. Diante das altas incidências de transtornos mentais nessa faixa etária é imprescindível que esses serviços de saúde estejam preparados e qualificados para atender essa demanda e prestar uma assistência adequada.
TÉCNICAS CRANIANAS UTILIZADAS NO TRATAMENTO DAS CEFALEIAS: UMA REVISÃO INTEGRATIVA.
Authors: Paulino Débora Cristina Silvestre , Rodrigues Leon Paiva
Published: November 2022

A ocorrência de dor cefálica ou cefaléia é a manifestação de maior prevalência na população, sendo ainda a causa mais freqüente de encaminhamento aos consultórios clínicos, bem como responsável pelo elevado índice de absenteísmo tanto no trabalho como na escola. As cefaléias de origem tensional tem se mostrado como o tipo de maior freqüência, por essa razão uma variedade de métodos e técnicas tem sido utilizadas com foco para promover o alivio dos sintomas e, sobretudo melhora da qualidade de vida. Este estudo tem como objetivo identificar e descrever o que as evidencias cientificas dizem sobre a influência das técnicas cranianas e sua utilização nos casos de cefaléias. Quanto à metodologia, caracteriza-se por um estudo de revisão integrativa de literatura com caráter descritivo, sendo realizada no período de março a junho de 2020 a partir de publicações disponíveis no bando de dados da biblioteca virtual de saúde – BVS, Pubmed, SciELO, LILACS e Pedro. Após analise dos sete trabalhos selecionados foi possível verificar que o uso das técnicas de osteopatia tem como foco a liberação das estruturas profundas do crânio com melhora do fluxo sanguíneo. Em todos os estudos avaliados foi possível verificar que após a aplicação das técnicas de osteopatia os indivíduos relataram relaxamento muscular e/ou sensação de conforto corporal com aumento significativo da amplitude de movimento e rotação cervical constatado pela fleximetria assim como o alivio do quadro de cefaléia. Entre as principais técnicas osteopáticas utilizadas estiveram à manipulação vertebral de alta velocidade, o tratamento manipulativo osteopático (TMO) e a Técnica Articulatória Rítmica Cervical – TARC. Podemos concluir que a realização deste estudo foi essencial para compreendermos como se da o uso da osteopatia e seus benefícios no tratamento de pacientes com cefaléia crônica, vale ressaltar que este estudo cumpriu com o objetivo proposto, sendo assim poderá servir como base para estudos posteriores envolvendo a temática.
A Critical Assessment of The Public Service Obligations (PSO) in European Air Routes
Authors: PARASCHİ Elen Paraskevi , GEORGOPOULOS Antonios , POLYCHRONİOU Panagiotis , KALOGERA Maria
Published: November 2022

The deregulation of air transport created the need to safeguard an acceptable level of air connectivity between urban centres and remote European regions. To this end, several protection schemes have been developed around the world, including the imposition of Public Service Obligations (PSOs) in a few European air routes. Thirty years after the establishment of PSOs in Europe, the debate over their efficiency and effectiveness is still active. This paper offers an overview of the European PSO program along with a review of the academic literature exploring the main issues that accompany the PSO scheme. The main findings that call for consideration from both scholars and policymakers are the need to strengthen the competition in these non-commercially attracting routes, the necessity for central network design and coordination and the requirement for transparency and open dissemination of information regarding the PSO routes.
Synthesis and research of optically transparent polymer on the basis of 2-metoxycarbonylparacyclopropylestyrene with glicidilmethacrylate
Authors:   Institute of Polymer Materials of ANAS, Guliyev K. G. , Mamedli S. B. ,   Institute of Polymer Materials of ANAS
Published: November 2022

The new polyfunctional optically transparent polymer on the basis of 2-methoxycarbonyl paracyclopropyl styrene and glycidyl methacrylate has been synthesized. The compositions and structures have been established and the parameters of copolymerization of the synthesized copolymer have been found. The copolymerization constant values on Feineman – Ross equation (r1 = 1.36, r2 = 0.30) and Q – e parameters on Alfrey – Price (Q1 = 2.573, е1 = –0.846) have been calculated. It has been detected that 2-methoxycarbonyl paracyclopropyl styrene is more active monomer than glycidyl methacrylate. The parameters of the copolymer microstructure have been determined. In comparison with polystyrene, the obtained copolymer has a higher refractive index. It has been established that the degree of light transmission ( = 1.5820) is 88 – 90 %. Depending on the composition of the optically transparent copolymer, the change rate of the light transmission index has been studied. It has been shown that the synthesized copolymer exceeds polystyrene and glycidyl methacrylate on the main exploitation indices and shows the high optical transparency, which allows its use in the manufacture of details of optical devices.
Mechanical properties and structure of the ZrN – Zr composite material produced by the oxidation constructing approach
Authors:   Baikov Institute of Metallurgy and Material Science RAS, Shokodko A. V. , Ogarkov A. I. ,   Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Ashmarin A. A. ,   Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Prosvirnin D. V. ,   Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Kovalev I. A. ,   Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Kolmakov A. G. ,   Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Chernyavskii A. S. ,   Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Solntsev K. A. ,   Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences
Published: November 2022

Using the approach of oxidative constructing due to diffusion saturation, massive samples of compact metal-ceramic composite materials with a gradient structure were obtained: a nitride ceramic shell is a near-surface layer of ZrN, a solid solution of nitrogen in zirconium is a core, which is a solid solution of nitrogen in zirconium. The synthesized composites have better strength indicators compared to the original metal blanks. Under compression conditions, composite samples ZrN – Zr are characterized by plasticity, under bending conditions, they are brittle. The applied approach of oxidative design makes it possible, in comparison with traditional methods, to obtain rather efficiently and economically gradient ceramic-metal samples of products with dimensions and shapes that maximally repeat those of the original metal workpiece.
AFTERBURNER WITH CONTINUOUS DETONATION OF LIQUID FUEL
Authors:   N. N. Semenov Federal Research Center for Chemical Physics of the Russian Academy of Sciences, FROLOV S. M. , IVANOV V. S. ,   N. N. Semenov Federal Research Center for Chemical Physics of the Russian Academy of Sciences, SHAMSHIN I. O. ,   N. N. Semenov Federal Research Center for Chemical Physics of the Russian Academy of Sciences, AKSENOV V. S. ,   N. N. Semenov Federal Research Center for Chemical Physics of the Russian Academy of Sciences, VOVK M. YU. ,   PJSC UEC-UMPO, Branch of A. Lyulka Design Bureau, MOKRYNSKIJ I. V. ,   PJSC UEC-UMPO, Branch of A. Lyulka Design Bureau, BRUSKOV V. A. ,   M/U 15650-16, IGONKIN D.V. ,   M/U 15650-16, MOSKVITIN S. N. ,   M/U 15650-16, ILLARIONOV A. A. ,   M/U 15650-16, MARCHUKOV E. YU. ,   Moscow Aviation Institute (National Research University)
Published: November 2022

The results of a new series of test ¦res of a detonation afterburner as part of turbojet engine are presented. In contrast to previous tests with a sequential arrangement of turbojet and afterburner [1], the new series provides for gasdynamic separation of air§ows: air is supplied to the afterburner separately using an auxiliary power unit simulating the bypass air§ow in a turbofan engine (Fig. 1). The separation of air§ows made it possible to ensure stable operation of the combined power plant in di¨erent modes of operation of the turbojet engine when the afterburner was turned on. In test ¦res, a stable mode of spinning detonation of aviation kerosene with single detonation wave was registered with a characteristic rotation frequency of 2 kHz (Fig. 2) and the detonative combustion of kerosene in the afterburner did not a¨ect the operation of the turbojet engine.
Evolutionary Model of e-Procurement Adoption: A Case of the Vietnam Construction Industry
Authors:   National University of Civil Engineering, Tran Quangdung , Drew Steve ,   University of Tasmania, Stewart Rodney Anthony ,   Griffith University
Published: November 2022

In order to propose more effective solutions to improve the diffusion of e-procurement technologies in the construction sector, it is very important to get a better understanding on the practical evolutionary process of e-procurement adoption at the enterprise level. This cases-study seeks to investigate the strategic evolution of e-procurement adoption in construction companies. Data collected from in-depth semi-structured interviews was analyzed by within-case and cross-case analyses to understand well the similarities and differences between the company cases regarding the way e-procurement technologies have been adopting and implementing. The present study found out a six-stage evolutionary model of e-procurement implementation specific for the context of Vietnamese construction industry. Further, it also proposed the best practical solutions for the casesstudied as well as for the general context toward more collaborative e-procurement environment. Although this study is based on the experience of the construction section in a specific country, it is believed its results may be applicable to other developing countries. Using the evolutionary model developed, construction companies are able to self-assess and locate their e-procurement adoption level, and so that establish appropriate practical solutions to move forward a higher level of e-procurement applicability.
Flexible Pavement Life Cycle Cost Analysis by Using Monte-Carlo Method and the Suggestions for Developing Countries
Authors:   National University of Civil Engineering, Vu Nam Hoai , Huu Dung Nguyen ,   National University of Civil Engineering, Tran Hung Duy ,   Transportation Department
Published: November 2022

Flexible Roadpavement plays an essential role in developing an effective, economic, and safe operation road network of any country. In Vietnam, a developing country, the selection of a suitable flexible pavement structure is always a challenge due to fiscal limitations. The traditional determinant method (TDM) by which pavement structures are selected mainly on the basis of initial construction costs and traffic load has been used for many years in the nation. This paper presents the use of Monte Carlo simulation to analyzethe entire flexible pavement life cycle cost. Data including initial and maintenance costs and road user costs were collected from several different types of existing flexible pavement in Nghe An province, Vietnam. Random variations of several main inputs were explored in order to develop density distribution functions. These functions then were used as the bases for Monte Carlo simulation. One million simulation runs were implemented and the Net Present Values (NPVs) among pavement types were compared under the light of risk analysis. Research results showed that TDM method provided bias and uncertain results compared to that of Monte Carlo one. In terms of long-term pavement performance, a low-cost pavement structure should not always be considered as a wise selection. Some other suggestions for a developing country as Vietnam were also included.