Connection Ability Research Articles

Novel steel connection for modular houses in indigenous communities: An experimental study

Remote Indigenous communities across Canada are facing housing shortages and the need for major repairs, which resulted from engineering challenges that obstructed the construction phases. Prefabricated steel moment-resisting frame modular houses are currently utilized as alternatives to typical conventical houses because of their technical advantages, such as better-quality control, lightweight structures, and ease of transportation to remote and rural regions. To explore the potential use of hollow structural sections (HSS) in panelized steel modular structures, this study presents a novel steel-bolted connection for connecting HSS beams to HSS columns using high-strength long bolts, indicating that the connections can be easily installed without requiring skilled workers and heavy machinery. Six specimens were fabricated and tested under monotonic load with a Digital Image correlation (DIC) camera to capture full-field 3D displacement and deformation until failure accurately. The impact of different geometric parameters such as bolt arrangement, extended plate thickness, number of bolts, and the existence of stiffener on the mechanical performance of the joint, stiffness, inelastic rotation, ductility, and failure modes were analyzed. Bolt arrangement with an aspect ratio of 1:1 was found to increase the connection capacity, initial stiffness, and ductility by 7%, 216%, and 26%, respectively. The yielding and rotation of the extended plate were eliminated using a stiffener. Increasing the number of bolts triggered the connection's ability to gain more capacity at earlier stages and reduced joint rotation by 60%.

Psychological Toughness and its Relationship to Some Coordination, Physical Abilities and Accuracy of Some Basic Skills Performance Among The Iraqi Junior National Handball Team Players

The purpose of this study was to identify the psychological toughness (PT) and its relationship to some coordination and physical abilities, and the accuracy of some basic performance skills of the Iraqi Junior National Handball Team players. The sample consisted of 14 players which constituted 88% of the research community (18) players. The descriptive approach was used to determine the correlation between PT and some coordination and physical abilities, and accuracy of some basic performance skills with single sample design. A questionare scale, consists of 32 items was applied. Coordinations tests included ability of differentiation, ability of suitable differentiation, and ability of connectivity. Physical tests included endurance of the muscules arms, endurance strength for arms, speed power of the leg musclues, the distinctive strength of the arms, endurance of speed, and transition speed. Skill tests included passing and receiving, dribbling, passing, shooting were also applied. The results shows that the players had a high PT and a significant coordination, physical and skill performance (P<.05). All values were found significant ( P<.05). The study concluded the need to pay a close attention to the psychological aspects of the team in order to improved the players acheveiments.

Markov chain-based traffic analysis on platooning effect among mixed semi- and fully-autonomous vehicles in a freeway lane

Focusing on a freeway lane running with mixed semi-autonomous vehicles (semi-AVs) and fully-autonomous vehicles (fully-AVs), this study aims to investigate the heterogeneous platooning effect of the two types of autonomous vehicles (AVs) on the travel efficiency of the mixed traffic. Such impact in the mixed semi-/fully-AV traffic, to the best of our knowledge, has not been well addressed in the literature as the existing mixed traffic studies on platooning effect typically focused on the traffic scenes with only human-driven vehicles (HVs) and fully-AVs. The existence of semi-AVs, which are optionally controlled by human drivers and semi-autonomous driving systems, and their significant difference in platooning behavior from the fully-AVs have received very limited attention. To fill the gap, we first characterize the semi- and fully-AVs’ difference in connection ability and willingness to platoon in the vehicle platooning process, and derive the heterogeneous platooning probabilities of semi- and fully-AVs. To formulate the platooned traffic after vehicle platooning process, we proceed to develop a novel Markov chain model to determine the probability distributions of vehicular platoon size and headway type among the mixed semi-/fully-AV traffic analytically. Furthermore, with the probability distributions, we derive the fundamental diagram (FD) and the capacity of the freeway lane for the mixed semi-/fully-AV traffic, and are thus able to investigate impact of platooning on the travel efficiency numerically. The developed models and unveiled insights in this study will help researchers and practitioners better understand the role, potential and prospect of automated transport system in the transitional stage with semi-AVs, which will be useful for guiding the mixed AV traffic management and control in near future.

A Correlational Study on Representational Abilities and Mathematical Connections in Junior High School

Mathematical representation and connection ability are part of the student's ability. Because of their low ability, educators will find it difficult to determine learning tools in the classroom. Therefore, finding a link between the two abilities is necessary to make it easier for teachers to prepare lessons. This study aims to determine the relationship between representational abilities and students' mathematical connections. The population in this study were all grade eight students at a state junior high school in Merbau Mataram, with a total sample of 34 selected using a class random sampling technique. The research instrument was a mathematical representation test and a connection ability test with a total of six questions. Data analysis used the correlation coefficient test of the Pearson/Product Moment formula. The results showed a significant relationship between students' mathematical representation ability and the overall connection. This means that the ability of mathematical representation is directly proportional to the ability of mathematical connections. The higher the student's mathematical representation ability, the higher the student's connection ability, and vice versa. Teachers can focus on preparing learning tools for one of these two abilities.

Implementation of CORE (Connecting, Organizing, Reflecting, Extending) Strategy on Students' Connection Ability in Elementary Mathematics Subjects

The key to the success of educators right on target for students is determined through the implementation of learning strategies. In fact, the CORE Strategy (Connecting, Organizing, Reflecting, Extending) aims to train students' connection skills, think critically, and be active in learning. The purpose of writing this article is to describe the implementation of the CORE strategy for students' connection abilities in mathematics at the elementary/MI level. This study uses a descriptive qualitative research method that aims to describe an object, phenomenon, or problem with the facts being studied. Data collection techniques were carried out using observation techniques, interviews, and documentation studies. Based on the results of this study it was found that the implementation of the CORE strategy could improve students' connection skills in mathematics. The student is active, gives a positive response when participating in the learning process, and understands the subject matter that has been taught. Thus, it is stated that the implementation of the CORE learning strategy in mathematics is categorized as appropriate for SD/MI children, as well as the students' connection abilities developing well and providing feedback in the ongoing learning process.

Systematic Literature Review (SLR): Pengaruh Self-Directed Learning terhadap Kemampuan Koneksi Matematis Siswa pada Materi Fungsi Eksponensial

Connection ability is one of the most important higher order thinking skills and must be developed because in learning mathematics every concept is related to one another. The learning model that is able to hone mathematical connection skills is self-directed learning (SDL). Individuals who have high self-directed learning are individuals who are proactive, have their own initiative, are resourceful, and are individuals who have a responsibility to always learn. This study aims to conduct a literature review related to the Self-Directed Learning model and the ability of mathematical connections. The research method used in this study is the SLR (Systematic Literature Review) method. Data collection is done by documenting all articles that have similar research in research reports. The articles used in this study were 15 national journal articles obtained from the Google Scholar database using the Harzing's Publish or Perish application. Based on this research, it was found that self-directed learning is an independent learning model that can motivate students in learning and can make a student continuously seek information in order to improve abilities. The learning model that is able to hone mathematical connection skills is Self-Directed Learning (SDL).

Accessibility-oriented performance evaluation of high-speed railways using a three-layer network model

High-speed railways, as dominant transportation patterns, constitute a large-scale complex network. Network performance is critical for high-level transportation services in transportation management. However, existing studies generally adopt pure topological indicators to evaluate performance in a single network and without considering the specific characteristics of rail transportation. This paper modeled the high-speed railway as a three-layer network including topological, functional, and service layers and assessed the integrated network performance from the view of transportation accessibility. In addition, the rail stations were prioritized and their performances in different layers were compared to analyze whether the total integrated performance was restricted by its connection abilities, functional capacities, and transportation service level. Finally, a case study of the high-speed rail network in China and comparisons with other traditional evaluation methods were conducted to verify the feasibility and superiority of the model. The findings of this study enable to provide management implications for rail transportation planning, organization, and operations.

Analysis of Mathematical Connection Skills Using Realistic Mathematical Education

Connection ability is the ability to associate between topics in mathematics, associate mathematics in other sciences, and with everyday life. This research aims to find out the ability of mathematical connections by using the realistic mathematical education of the concept of Social Arithmetic in class VII of SMP Negeri 209 Jakarta. This type of research is qualitative descriptive with the selection of subjects based on the results of interviews. The main instrument in the study was the researchers themselves. Instruments for discovering mathematical connection skills are tests and interviews. Data collection techniques with observation guidelines, tests, interviews, and documentation. Data analysis used is qualitative analysis i.e. data collection, presentation of data, and withdrawal of conclusions. The results of the analysis showed that subjects included students who had the ability of mathematical connections that met 4 indicators of mathematical connections, namely recognizing the equivalent representation of the same concept, recognizing the relationship of a mathematical procedure of a representation to an equivalent representation procedure, using and assessing the relationship between topics with other disciplines, using mathematics in everyday life

Applications of digital manufacturing to steel frames: The Intermeshed Steel Connection

AbstractDespite wide use of terms such as “digital manufacturing” and “digital fabrication” in the constructional steel industry, actual use to date is mostly limited to research and development activities. In contrast, other heavy industries, such as automotive and aerospace have moved much faster and implemented many aspects of digital manufacturing and fabrication in product creation and traditional workflows. As a foil to the current state of the industry, this paper presents the erection, and disassembly of a simple, two‐storey frame that employs an alternative steel connection that can be manufactured using current plasma, laser, and water jet technologies, referred to as the intermeshed steel connection (ISC). The field demonstration described in this paper shows the connection's ability to reduce on site erection time, substantially reduce the number of site bolts, eliminate site welding, and allow for easy deconstruction. The connection has been under testing and development through a consortium of the University College Dublin, Queens University Belfast and, the University of Minnesota.

Teams Games Tournament Assisted by Tic Tac Toe Media on the Effectiveness of Students in Learning

This study aimed to determine the effectiveness of learning in fifth-grade students at SD Negeri I Wonodadi Wetan through the Teams Games Tournament (TGT) type of cooperative learning model. The use of the Teams Games Tournament (TGT) cooperative learning model with the help of Tic Tac Toe media was chosen because the model was considered capable of growing students' enthusiasm and interest in learning effectiveness. This study uses qualitative research where this study uses analytical techniques consisting of data collection, data collection, and conclusions. Using the TGT model makes students learn from each other, causing students to work together. As for the effect of using the Teams Games Tournament (TGT) type cooperative learning model, there is an interaction between learning methods with high and low learning curiosity on the effectiveness of student learning. Cooperative Learning Method Team Game Tournament can improve learning effectiveness or performance, such as connection ability, activity, learning motivation, and student understanding.

Koneksi Matematis Siswa pada Tugas Matematis Berbasis Hasil Pertanian: Konteks, Konsep, dan Prosedur Matematis

The mathematical connection is a crucial ability possessed by vocational high school students in solving problems by their field of expertise. Agriculture is a field of expertise that requires a lot of mathematical connection skills to solve various problems. Increasing the ability of students' mathematical connections can be facilitated by the teacher by constructing mathematical tasks in the agricultural sector. This qualitative research using the case study method describes the construction of mathematical tasks based on agricultural products and the mathematical connection ability of students in solving the task. Mathematical task construction is carried out by integrating agricultural product contexts and mathematical concepts. The mathematical task was used in Grade X Agribusiness Expertise students of Agricultural Product Processing. Data retrieval of students' mathematical connection abilities was carried out through tests, observation results, answer sheets, and interviews that focused on connecting contexts with mathematical concepts, connections between mathematical concepts, and connections to mathematical procedures. The results of the student data analysis showed that the ability of mathematical connections was hampered by the ability of the connection between mathematical concepts. It is necessary to increase student's mathematical connections by constructing mathematical tasks with various mathematical concepts.

Fine-scale genetic structure of the freshwater snail Promenetus exacuous in the New York State region: the influences of historical colonization, habitat connectivity and dispersal ability

ABSTRACT The pulmonate freshwater snail Promenetus exacuous (Planorbidae) has a widespread patchy distribution throughout much of North America, including New York State and the surrounding areas. Minimal life history information exists for the species in this region and information on its genetic diversity and structure is currently lacking for any portion of its range. We examined the species’ reproductive behaviour, genetic diversity and population structure throughout New York and western Connecticut using cytochrome c oxidase subunit I (COI) haplotypes (241 snails) and 10 microsatellite loci (312 snails). Throughout the region, P. exacuous is a single, primarily outcrossing species with relatively high within-population genetic diversity. Populations are genetically differentiated and composed of divergent COI lineages. The region was colonized after the Wisconsin glacial retreat by snails from multiple, historically isolated populations and Pleistocene events played a major role in the historical diversification of lineages. Subsequent dispersal has likely been facilitated by birds and humans, but contemporary gene flow is low, resulting in genetic differentiation even among geographically proximate sites. Our data reveal that complex interactions between historical and contemporary processes contribute to the overall patterns of genetic diversity in freshwater snails.

Impact of nutrition education program on caregivers influencing the dietary practices of autistic children

Autism is a complex neurobehavioral condition that includes disability in social connection, formative language, and relational abilities joined with inflexible behaviors. Children with autism experience difficulty in communication.

Alpha connectivity and inhibitory control in adults with autism spectrum disorder

BackgroundIndividuals with autism spectrum disorder (ASD) often report difficulties with inhibition in everyday life. During inhibition tasks, adults with ASD show reduced activation of and connectivity between brain areas implicated in inhibition, suggesting impairments in inhibitory control at the neural level. Our study further investigated these differences by using magnetoencephalography (MEG) to examine the frequency band(s) in which functional connectivity underlying response inhibition occurs, as brain functions are frequency specific, and whether connectivity in certain frequency bands differs between adults with and without ASD.MethodsWe analysed MEG data from 40 adults with ASD (27 males; 26.94 ± 6.08 years old) and 39 control adults (27 males; 27.29 ± 5.94 years old) who performed a Go/No-go task. The task involved two blocks with different proportions of No-go trials: Inhibition (25% No-go) and Vigilance (75% No-go). We compared whole-brain connectivity in the two groups during correct No-go trials in the Inhibition vs. Vigilance blocks between 0 and 400 ms.ResultsDespite comparable performance on the Go/No-go task, adults with ASD showed reduced connectivity compared to controls in the alpha band (8–14 Hz) in a network with a main hub in the right inferior frontal gyrus. Decreased connectivity in this network predicted more self-reported difficulties on a measure of inhibition in everyday life.LimitationsMeasures of everyday inhibitory control were not available for all participants, so this relationship between reduced network connectivity and inhibitory control abilities may not be necessarily representative of all adults with ASD or the larger ASD population. Further research with independent samples of adults with ASD, including those with a wider range of cognitive abilities, would be valuable.ConclusionsOur findings demonstrate reduced functional brain connectivity during response inhibition in adults with ASD. As alpha-band synchrony has been linked to top-down control mechanisms, we propose that the lack of alpha synchrony observed in our ASD group may reflect difficulties in suppressing task-irrelevant information, interfering with inhibition in real-life situations.

A preliminary study of atypical cortical change ability of dynamic whole-brain functional connectivity in autism spectrum disorder

Objectives Designing new objectively diagnostic methods of autism spectrum disorder (ASD) are burning questions. Dynamic functional connectivity (DFC) methodology based on fMRI data are an effective lever to investigate changeability evolution of signal synchronization in macroscopic neural activity patterns. Methods Embracing the network dynamics concepts, this paper introduces changeability index (-score)which is focused on time-varying aspects of FCs, and develops a new framework for researching the roots of ASD brains at resting states in holism significance. The important process is to uncover noticeable regions and subsystems endowed with antagonistic stance in -scores of between atypical and typical DFCs of 30 healthy controls (HCs) and 48 ASD patients. Results The abnormities of edge C-scores are found across widespread brain cortex in ASD brains. For whole brain regional C-scores of ASD patients, orbitofrontal middle cortex L, inferior triangular frontal gyrus L, middle occipital gyrus L, postcentral gyrus L, supramarginal L, supramarginal R, cerebellum 8 L, and cerebellum 10 Rare endowed with significantly different -scores.At brain subsystems level, C-scores in left hemisphere, right hemisphere, top hemisphere, bottom hemisphere, frontal lobe, parietal lobe, occipital lobe, cerebellum sub systems are abnormal in ASD patients. Conclusions The ASD brains have whole-brain abnormity on widespread regions. Through the strict evidence-based study, it was found that the changeability index (C-score) is a meaningful biological marker to explore cortical activity in ASD.

Analisis Koneksi Matematika Ditinjau dari Tipe Kepribadian Sanguinis, Koleris, Melankolis, dan Plegmatis

Mathematics is a subject that has the concept of interrelation between one material with another. Understanding the interrelated material required the existence of a basic ability that is the ability to connect mathematics. The obstacle experienced by students is that when given a problem and the solution is related to the previous material, students are unable to remember the material that is the key to solving the problem. The inability of students is due to lack of memory of previous material and students pay less attention when the teacher is explaining in class. Personality differences make students have different mathematical connection abilities. The purpose of this study is to describe the ability of students' mathematical connections in terms of sanguinis, koleris, melancholy, and plegmatic personality types. This type of research is a qualitative descriptive study in the form of case study research. Methods of data collection used personality type questionnaires, math connection test questions, and interviews. The results showed that the sanguinis and plegmatic personality types were able to meet all the connection indicators. Koleris personality type is able to fulfill 4 indicators. Melancholy personality types produce different connection capabilities, namely the ability of connections that meet 4 indicators and 1 indicator. This research can provide benefits for students to improve their mathematical connections and understand their personality types. Students who understand their personality types can minimize negative traits that inhibit mathematical connections.

Analysis of students’ mathematical connection abilities in solving problem of circle material: transposition study

This study aims to describe the ability of students' mathematical connections in solving problems in the circle equation material through transposition studies. The method in this research is a descriptive qualitative approach, the techniques used in the study are tests, interviews, and documentation to explore data in research. Test and interview techniques were carried out in order to find out more about the ability of connections and generate knowledge about the transposition in making mathematical problem solving designs. The test is given to 3 students who have high ability, medium ability and low ability. Analysis of the data in this study is through the provision of problem solving tests and interviews using time triangulation, which provides tests and interviews for each student with a different time. The results in this study indicate that highly capable subjects have excellent mathematical connections and didactic knowledge is well utilized and able to provide alternative answers that differ from researchers so that a didactic transposition is formed, that is knowledge to be taught with knowledge, subjects of mathematical ability are able understand the problem well but are not careful enough in solving problem so that previous knowledge is underutilized, the subject of low mathematical ability is not able to understand the problem well and is unable to solve problems in the form of algebra so that the initial knowledge possessed is not well connected.

Numerical model to predict the effect of wood density in wood–steel–wood connections with and without passive protection under fire

The main objective of this work is to present a numerical model to predict the effect of wood density in unprotected wood connections with an internal steel plate (wood–steel–wood), when comparing with the same connections using passive protection with gypsum plasterboard, submitted to fire conditions. Wood–steel–wood connections are made of four wood members, two on each side, with an internal steel plate that connects the pieces using steel dowel fasteners. First, analytical methodologies according to Eurocode 5 part 1-1 were used to design the connections at room temperature. After that, to predict the fire exposure and the connection ability, a numerical model was performed which permits to compare the fire resistance in wood–steel–wood connections without and with passive protection following the Eurocode 5 part 1-2. Results of the temperature and the wood char layer depth were compared using three different wood densities. The evolution of the charring rate was calculated in different locations of the connections and compared with the analytical value proposed by the Eurocode 5 part 1-2.

IMPROVING MATHEMATIC CONNECTION AND COMMUNICATION CAPABILITY AND SELF-CONCEPT OF VOCATIONAL SCHOOL STUDENTS THROUGH THE SAINTIFIC APPROACH TO THE SETTINGS OF JIGSAW COOPERATIVE LEARNING MODELS

This research was aimed at examining the improving mathematical connection and communication ability and self-concept of vocational students through cooperative learning of jigsaw so that they were able to be more motivated in learning mathematics, more understanding mathematics learning itself and to apply it in everyday life. This research method was a quasi-pretest-posttest experiment that applied a jigsaw cooperative learning model. This study involved two groups of students who studied about mathematical connection and communication skills and students' self-concepts. The instruments used were in the form of mathematical connection and communication skills, as well as student self-concept questionnaires. The research instruments were firstly tested for validity (logical and empirical), reliability, distinguishing features and the level of difficulty of the questions. The achievement of mathematical connections and communication skills and the self-concept of students who got learning with a scientific approach to the type of cooperative learning model jigsaw was better than students who only learned the scientific approach. In this study there was also an association between the ability of connections with mathematical communication of students in the high category. There was an association between the ability of connections with students' self-concepts in the high category. There was an association between mathematical communication skills and students' self-concepts in the high category.

An improvement method for degree and its extending centralities in directed networks

Vital nodes identification in social networks keeps attracting lots of attention in recent years because of its great theoretical and practical significance for many applications. Degree centrality is one of the most efficient neighborhood-based metrics and has been widely used because of its simplicity and low computation complexity. Many other centralities derived from degree have been proposed to try to further improve the accuracy on ranking performance by extending the coverage area of neighbors. But a common problem of degree and its extensional centralities is that the directivity of edges between nodes is not considered. In directed network, nodes’ importance are not only related with their neighbor numbers but also related with the relationships between the nodes and their neighbors. In this paper, we propose a modification method with an adjustable parameter α on degree to improve its ranking accuracy in directed networks. This method redefines the degree of a node by separately taking into account its out-degree and in-degree and uses parameter α to flexibly set the relative weights between out-degree and in-degree when evaluating nodes’ importance in different scenes, which can effectively avoid the situation that too many neighbors from one direction could lead to extreme high value of centrality. We also apply this method on another two centralities: semi-local and k-hop, and for the two centralities that considering multi-step neighbors, the corresponding improvement centralities could eliminate the irrelevant multi-step neighbors when evaluating nodes’ importance. Experimental results in 3 real social networks and 1 artificial network indicate that, setting α to be appropriate value the improvement centralities can better estimate nodes’ connection abilities, propagation abilities and immunization abilities while keeping the same compute complexity with the corresponding original centralities, especially in the network with low percentage of bidirectional edges. Moreover, the improvement method proposed in this paper also can be applied to other centralities, such as eigenvector centrality, neighborhood centrality, Exdegree centrality and percolation based centrality, to improve their performances in directed networks.