Digital Commons Network^™

Analytical Solutions For Advanced Functional Differential Equations With Discontinuous Forcing Terms And Studying Their Dynamical Properties, Amal Khalaf Haydar, Habeeb Kareem Abdullah, Kawther Reyadh Obead

Baghdad Science Journal

This paper aims to find new analytical closed-forms to the solutions of the nonhomogeneous functional differential equations of the nth order with finite and constants delays and various initial delay conditions in terms of elementary functions using Laplace transform method. As well as, the definition of dynamical systems for ordinary differential equations is used to introduce the definition of dynamical systems for delay differential equations which contain multiple delays with a discussion of their dynamical properties: The exponential stability and strong stability

Biological Evaluation And Theoretical Study Of Bi-Dentate Ligand For Amoxicillin Derivative With Some Metal Ions, Sahar S. Hassan, Nidhal M. Hassan, Shaymaa Rajab Baqer, Asmaa M. Saleh

Baghdad Science Journal

In this paper, the complexes of Shiff base of Methyl -6-[2-(diphenylmethylene)amino)-2-(4-hydroxyphenyl)acetamido]-2,2-dimethyl-5-oxo-1-thia-4-azabicyclo[3.2.0]heptane-3-carboxylate (L) with Cobalt(II), Nickel(II), Cupper(II) and Zinc(II) have been prepared. The compounds have been characterized by different means such as FT-IR, UV-Vis, magnetic moment, elemental microanalyses (C.H.N), atomic absorption, and molar conductance. It is obvious when looking at the spectral study that the overall complexes obtained as monomeric structure as well as the metals center moieties are two-coordinated with octahedral geometry excepting Co complexes that existed as a tetrahedral geometry. Hyper Chem-8.0.7 program was employed, after calculating the heat of formation (ΔH°f), binding energy (ΔEb), dipole moment( µ ), …

Enhancement Of Electron Temperature Under Dense Homogenous Plasma By Pulsed Laser Beam, Khalid A. Yahya

Baghdad Science Journal

The applications of hot plasma are many and numerous applications require high values of the temperature of the electrons within the plasma region. Improving electron temperature values is one of the important processes for using this specification in plasma for being adopted in several modern applications such as nuclear fusion, plating operations and in industrial applications. In this work, theoretical computations were performed to enhance electron temperature under dense homogeneous plasma. The effect of power and duration time of pulsed Nd:YAG laser was studied on the heating of plasmas by inverse bremsstrahlung for several values for the electron density ratio. …

Drinking Water Quality Evaluation Of Hand Pumping Wells Using Water Quality Index And Standard Algal Toxicity Testing In Mansoura And Talkha Cities, Egypt, Marriam M. Ismail, Ahmed M. El-Naggar, Mai I. El-Gammal, Ahmed E. Hagras

Baghdad Science Journal

Six house-hold Abyssinian pumps distributed in different villages of Mansoura (Mans-I, Mans-II and Mans-III) and Talkha (Talk-I, Talk-II and Talk-III) cities, Egypt, have been selected for regular seasonal water quality assessment during 2017. Water samples have been collected within the mid-periods of four seasons Standard assessment tools were employed for the integrated water quality assessment including Water Quality Index (WQI) and ISO standard algal toxicity test. WQI displayed remarkable local and seasonal variations with excellent (≥ 90) and good (70 - 89) only recorded for water samples collected from Mans-I pump located in sparsely populated area and far 50 meters …

Designing Primers With A Plant Signal Peptide To Enhance The Expression Of Gba1 In Transgenic Soybean Plants, Zainab Tuama Al-Dallee

Baghdad Science Journal

Transgenic plants offer advantages for the manufacture of recombinant proteins with terminalmannose residues on their glycan chains. So plants are chosen as source of pharmaceutical products and forthe development of alternative expression systems to produce recombinant lysosomal enzymes. In thepresent study the sequence of the natural cDNA encoding for the human lysosomal enzymeglucocerebrosidase (GCD) was modified to enhance its expression in soybean plants. The glucocerebrosidasegene signal peptide was substituted with that signal peptide for the Arabidopsis thaliana basic endochitinasegene to support the co-translational translocation into the endoplasmic reticulum (ER), and the storagevacuole. So, targeting signal from tobacco chitinase A, to …

On (Ɱ,ɳ)-Strongly Fully Stably Banach Algebra Modules Related To An Ideal Of Am ×ɳ, Radhi Ibraheem Mohammed Ali, Muna Jasim Mohammed Ali, Samira Naji Kadhim

Baghdad Science Journal

The aim of this paper is introducing the concept of (ɱ,ɳ) strong full stability B-Algebra-modulerelated to an ideal. Some properties of (ɱ,ɳ)-strong full stability B-Algebra-modulerelated to an ideal have been studied and another characterizations have been given. The relationship of (ɱ,ɳ) strong full stability B-Algebra-modulerelated to an ideal that states, a B-Ạ-module Ӽis (ɱ,ɳ)-strong full stability B-Algebra-modulerelated to an idealῌ, if and only if for any two ɱ-element sub-sets {Ṋẋ1,Ṋẋ1,ẋ2,⋯,Ṋẋ1,ẋ2,⋯,ẋɳ}and {Ḿỳ1,Ḿỳ1,ỳ2,⋯,Ḿỳ1,ỳ2,⋯,ỳɳ}of Ӽɳ, if ����∉∑������∩Ӽɱῌ����=1, for each j = 1, ..., ɱ, i = 1,..., ɳ����∈{Ṋẋ1,Ṋẋ1,ẋ2,⋯,Ṋẋ1,ẋ2,⋯,ẋɳ}and ����∈{Ḿỳ1,Ḿỳ1,ỳ2,⋯,Ḿỳ1,ỳ2,⋯,ỳɳ}implies��Ạɳ({Ṋẋ1,Ṋẋ1,ẋ2,⋯,Ṋẋ1,ẋ2,⋯,ẋɳ}) ⊈��Ạɳ({Ḿỳ1,Ḿỳ1,ỳ2,⋯,Ḿỳ1,ỳ2,⋯,ỳɳ})have been proved

Improvement Of The Fault Tolerance In Iot Based Positioning Systems By Applying For Redundancy In The Controller Layer, Nawzad K. Al-Salihi

Baghdad Science Journal

In recent years, the positioning applications of Internet-of-Things (IoT) based systems have grown increasingly popular, and are found to be useful in tracking the daily activities of children, the elderly and vehicle tracking. It can be argued that the data obtained from GPS based systems may contain error, hence taking these factors into account, the proposed method for this study is based on the application of IoT-based positioning and the replacement of using IoT instead of GPS. This cannot, however, be a reason for not using the GPS, and in order to enhance the reliability, a parallel combination of the …

The Disrupt: A Measure Of Parent Distraction With Phones And Mobile Devices And Associations With Depression, Stress, And Parenting Quality., Brandon T. Mcdaniel Phd

Health Services and Informatics Research

Abstract

The landscape of modern parenting has shifted as an increasing number of parents have and utilize smartphones and other mobile devices throughout the day. A validated measure of parent distraction with these devices is needed in the field. It is important to have a validated measure of parent distraction with mobile devices (e.g., phubbing, technoference), as this distraction can be common at times and could negatively impact the quality of parenting that children receive. In the current study, I developed a brief, parent-reported survey measure of parent distraction (DISRUPT), examined its reliability and validity (convergent, divergent) in two survey …

Genetic Characterization Of Banteng (Bos Javanicus) Populations In Thailand For Conservation, Sirinart Chaichanathong, Worata Klinsawat, Manakorn Sukmak, Apichaya Sakulthai, Worawidh Wajjwalku, Supaphen Sripiboon, Nongnid Kaolim, Seree Nakbhun, Burachat Tunpradit, Tarasak Nipanunt, Wanlaya Tipkantha, Marnoch Yindee, Nikorn Thongtip

The Thai Journal of Veterinary Medicine

Banteng (Bos javanicus), an endangered, wild ungulate, plays a major role in seed dispersal and as a prey animal in Thailand. The population of wild banteng is threatened by poaching and habitat losses. Captive breeding management of banteng has been established and reintroduction of banteng has been successful in some areas. This study investigated the genetic variation of wild and captive banteng, based on mitochondrial DNA (mtDNA) and the Y-chromosome. The mtDNA analysis revealed three novel maternal haplotypes. The Y-chromosome analysis showed two Y-chromosome haplotypes based on the SRY region in the Thai population. This region may be useful as …

Evaluating The Effects Of Prunus Laurocerasus Seed, Fruit And Leaf Extracts On Hyperglycaemia, Insulin Sensitivity And Anti-Oxidative Activities In Experimental Diabetes In Rat, Hamit Uslu, Gözde Atila Uslu

The Thai Journal of Veterinary Medicine

Although insulin resistance is widely accepted as one of the main characteristics of type 2 diabetes, there are studies suggesting that there is a link between the development of type 1 diabetes and insulin resistance in recent years. Therefore, in this study, it was aimed to investigate the effects of Prunus laurocerasus (PL) seeds, fruit and leaf extracts on hyperglycemia, adiponectin and irisin levels which are known to be effective in the mechanisms of insulin sensitivity, and oxidative stress in rats with type 1 diabetes. The study groups were as follows: normoglycaemic (NC), diabetic control (DC), diabetic + seed extract …

Prevalence Of Shiga Toxin-Producing Escherichia Coli In Buffaloes On Smallholdings In Coastal Area In Bangladesh, Md Shahriar Mannan, Farzana Rabbi, Md Gholam Kibria, Sirazul Islam, Md. Bayzid, Zamila Bueaza Bupasha, Md Zohorul Islam, Md Samun Sarker, Paritosh Kumar Biswas

The Thai Journal of Veterinary Medicine

Shiga toxin-producing Escherichia coli (STEC) is an important causal agent of food borne diseases. Although the presence of STEC has been reported in cattle, goat, and sheep in previous studies in Bangladesh, there is seemingly no information on sorbitol non-fermenting STEC (SN-F STEC) carriage in buffalo. We aimed to assess the prevalence of SN-F STEC and to identify common virulence genes in SN-F STEC strains from apparently healthy buffaloes on smallholdings in coastal area in Bangladesh. Total 308 buffaloes on smallholdings in Patenga and Anwara Upazila, Chattogram division, Bangladesh were randomly sampled by collecting a swab from the recto-anal junction …

Antifungal Activity Of Green Sulfur Nanoparticles Synthesized Using Catharanthus Roseus Extract Against Microsporum Canis, Akarapon Chantongsri, Patchara Phuektes, Glenn N. Borlace, Jareerat Aiemsaard

The Thai Journal of Veterinary Medicine

Elemental sulfur has been used for a long time to treat superficial mycoses in both medical and veterinary practices, but effective treatment requires high concentrations of sulfur. Encapsulation of sulfur in nanoparticles can potentially allow the delivery of high concentrations of sulfur to infections. Sulfur nanoparticles were synthesized from Catharanthus roseus extract and sodium sulfide at various pH conditions (4, 6, and 7). Particle identification and characterizations were performed by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), and dynamic light scattering analysis. Broth microdilution and time-kill assays were used to determine the antifungal effect against Microsporum canis DMST29297. The …

Subtyping Of Blastocystis Infection In Common Quails (Coturnix Coturnix) In Xinxiang City Of China, Xuehan Liu, Xuefeng Yang, Zhixing An, Yaming Ge, Rongjun Wang, Haiju Dong, Huili Zhu

The Thai Journal of Veterinary Medicine

Blastocystis is a unicellular anaerobic intestinal protist primarily of various animal species worldwide, and has been reported to inhabit humans as well. Blastocystis infections and subtype identification have been documented in China, although infections by the protist in quail remain unknown. Herein, a total of 128 fecal samples were collected from captive quails (Coturnix coturnix) in Xinxiang city, central China, and tested for the prevalence and genetic characteristics of Blastocystis. Ten (7.8%) samples were positive by PCR amplification and sequencing the barcode regeion of the SSU rRNA gene. Sequence analysis showed that ST7 was the predominant subtype with max identity …

Successful Management Of Feline Gastrointestinal Eosinophilic Sclerosing Fibroplasia With Mycophenolate Mofetil And Prednisolone Following Surgical Resection In A Cat, Min-Soo Kim, Keon Kim, Gwang-Hyun Lee, Cheol-Hyun Kim, Seo-Lin Jang, Guk-Hyun Suh, Chang-Min Lee

The Thai Journal of Veterinary Medicine

A 1-year-old castrated male Ragdoll who showed a series of vomiting and had reduced appetite presented to a local animal hospital. Hyperthermia and tachypnea were observed in physical examination, and leukocytosis was detected in hematological examination. Abdominal ultrasonography revealed an intramural mass with irregular echogenicity extending from the pylorus to the duodenum and loss of intestinal wall layer with regional lymph node enlargement. After exploratory laparotomy for biopsy and symptomatic alleviation, histopathological evaluation revealed densely infiltrated eosinophils within the branching and anastomosing trabecular pattern of collagen by several spindle-shaped cells. Finally, the patient was diagnosed with feline gastrointestinal eosinophilic sclerosing …

A Case Of Acquired Idiopathic Megaoesophagus In A Dog: The Use Of Sildenafil As Treatment, Yeremia Yobelanno Sitompul, Willy Moris Nainggolan, Bradley O’Hagan

The Thai Journal of Veterinary Medicine

Acquired idiopathic megaoesophagus in dogs is rarely found in Indonesia. In this case report, a dachshund dog was presented with a history of vomiting after eating. Clinical examination, complete blood count, kidney, and liver tests identified only minor dehydration. On observation of the dog after eating, the sign reported as vomiting was confirmed as regurgitation. Radiography and contrast studies identified a significantly dilated oesophagus. With an absence of other clinical abnormalities, the dog was diagnosed with idiopathic megaoesophagus and prescribed treatment with sildenafil twice daily at 0.75mg/kg for five days, along with postural management of feeding. Treatment resulted in cessation …

A Fine-Grained Attribute Based Data Retrieval With Proxy Re-Encryption Scheme For Data Outsourcing Systems, Hanshu Hong, Ximeng Liu, Zhixin Sun

Research Collection School Of Computing and Information Systems

Attribute based encryption is suitable for data protection in data outsourcing systems such as cloud computing. However, the leveraging of encryption technique may retrain some routine operations over the encrypted data, particularly in the field of data retrieval. This paper presents an attribute based date retrieval with proxy re-encryption (ABDR-PRE) to provide both fine-grained access control and retrieval over the ciphertexts. The proposed scheme achieves fine-grained data access management by adopting KP-ABE mechanism, a delegator can generate the re-encryption key and search indexes for the ciphertexts to be shared over the target delegatee’s attributes. Throughout the process of data sharing, …

Antimicrobial Effect Of Eco- Friendly Silver Nanoparticles Synthesis By Iraqi Date Palm (Phoenix Dactylifera) On Gram-Negative Biofilm-Forming Bacteria, Shaimaa Obaid Hasson, Sumod Abdul Kadhem Salman, Shurooq Falah Hassan, Shatha Mohammed Abbas

Baghdad Science Journal

Date palm silver nanoparticles are a green synthesis method used as antibacterial agents. Today, there is a considerable interest in it because it is safe, nontoxic, low costly and ecofriendly. Biofilm bacteria existing in marketed local milk is at highly risk on population health and may be life-threatening as most biofilm-forming bacteria are multidrug resistance. The goal of current study is to eradicate biofilm-forming bacteria by alternative treatment green synthesis silver nanoparticles. The biofilm formation by bacterial isolates was detected by Congo red method. The silver nanoparticles were prepared from date palm(khestawy) fruit extract. The formed nanoparticles were characterized with …

A Prevalence Study Of Entamoeba Spp. In Basrah Province Using Different Detection Methods, Athraa Abdulameer Al-Hilfi, Maha Khalil Al-Malak, Muslim Abdulrahman Al-Tomah

Baghdad Science Journal

This study aims to determine the prevalence of Entamoeba histolytica, Entamoeba dispar andEntamoeba moshkovskii by three methods of diagnosis (microscopic examination, cultivation and PCR) thatwere compared to obtain an accurate diagnosis of Entamoeba spp. during amoebiasis. Total (n=150) stoolsamples related to patients were (n = 100) and healthy controls (n= 50). Clinically diagnosed stool samples(n=100) were collected from patients attending the consultant clinics of different hospitals in Basrah duringthe period from January 2018 to January 2019. The results showed that 60% of collected samples werepositive in a direct microscopic examination. All samples were cultivated on different media; the Brain heartinfusion …

Some Results On Normalized Duality Mappings And Approximating Fixed Points In Convex Real Modular Spaces, Salwa Salman Abed, Meena Fouad Abduljabbar

Baghdad Science Journal

In this paper, the concept of normalized duality mapping has introduced in real convex modular spaces. Then, some of its properties have shown which allow dealing with results related to the concept of uniformly smooth convex real modular spaces. For multivalued mappings defined on these spaces, the convergence of a two-step type iterative sequence to a fixed point is proved

Fuzzy Convergence Sequence And Fuzzy Compact Operators On Standard Fuzzy Normed Spaces, Raghad I. Sabri

Baghdad Science Journal

The main purpose of this work is to introducesome types of fuzzy convergence sequencesof operators defined on a standard fuzzy normed space(SFN-spaces) and investigate some properties and relationships between these concepts.Firstly,the definition of weak fuzzy convergence sequence in terms of fuzzy bounded linear functionalis given. Then thenotionsof weakly andstrongly fuzzy convergence sequencesof operators (Γn)are introducedand essential theorems related to these conceptsare proved.In particular,if (Γn) is a strongly fuzzy convergent sequencewith a limit Γwhere Γlinear operatorfrom complete standard fuzzy normed space (U,��U,⊛)into a standard fuzzy normed space (V,��V,⊛)then Γbelongs to the set of all fuzzy bounded linear operators����(U,V). Furthermore, the concept …

Boubaker Wavelets Functions: Properties And Applications, Suha N. Shihab, Eman H. Ouda, Samaa F. Ibraheem

Baghdad Science Journal

This paper is concerned with introducing an explicit expression for orthogonal Boubaker polynomial functions with some important properties. Taking advantage of the interesting properties of Boubaker polynomials, the definition of Boubaker wavelets on interval [0,1) is achieved. These basic functions are orthonormal and have compact support. Wavelets have many advantages and applications in the theoretical and applied fields, and they are applied with the orthogonal polynomials to propose a new method for treating several problems in sciences, and engineering that is wavelet method, which is computationally more attractive in the various fields. A novel property of Boubaker wavelet function derivative …

Qtaim Study Of The Bonding In Triosmium Trihydridecluster[Os3(Μ-H)3(Μ3-ɳ2-Cc7h3(2-Ch3)Ns)(Co)8], Nadia Ezzat Al-Kirbasee, Shatha Raheem Helal Alhimidi, Muhsen Abood Muhsen Al-Ibadi

Baghdad Science Journal

The Atoms in Molecules (AIM) analysis for triosmium cluster, which contains trihydridede, carbon, carbonyl and 2-methylbenzothiazolide ligands, [Os3(µ-H)3(µ3-ɳ2-CC7H3(2-CH3)NS)(CO)8] is reported. Bonding features in this cluster has been analyzed based on QTAIM ("Quantum Theory of Atoms in Molecules") in this work. The topological indices derived from electron density of relevant interactions in triosmium compound have been studied. The major interesting point of the AIM analyses is that the core of part (Os3H3) reveals the absence of any critical points and bond paths connecting any pairs of Os metal atoms. However, bond critical points with their bond paths occurring between all Os-H …

Studying The Photodegradation Of Congo Red Dye From Aqueous Solutions Using Bimetallic Au–Pd/Tio2 Photocatalyst, Souad A. Mousa, Sanaa Tareq, Eman A. Muhammed

Baghdad Science Journal

In this study, the photodegradation of Congo red dye (CR) in aqueous solution was investigated using Au-Pd/TiO2 as photocatalyst. The concentration of dye, dosage of photocatalyst, amount of H2O2, pH of the medium and temperature were examined to find the optimum values of these parameters. It has been found that 28 ppm was the best dye concentration. The optimum amount of photocatalyst was 0.09 g/75 mL of dye solution when the degradation percent was ~ 96 % after irradiation time of 12 hours, while the best amount of hydrogen peroxide was 7μl/75 mL of dye solution at degradation percent ~97 …

New Spectral Range Generations From Laser-Plasma Interaction, Shaimaa S. Mahdi, Kadhim A. Aadim, Madyan A. Khalaf

Baghdad Science Journal

High-intensity laser-produced plasma has been extensively investigated in many studies. In this demonstration, a new spectral range was observed in the resulted spectra from the laser-plasma interaction, which opens up new discussions for new light source generation. Moreover, the characterizations of plasma have been improved through the interaction process of laser-plasma. Three types of laser were incorporated in the measurements, continuous-wave CW He-Ne laser, CW diode green laser, pulse Nd: YAG laser. As the plasma system, DC glow discharge plasma under the vacuum chamber was considered in this research. The plasma spectral peaks were evaluated, where they refer to Nitrogen …

Fabrication And Characterization Of Nanofibers Membranes Using Electrospinning Technology For Oil Removal, Amer N. Al-Naemi, Mohammed A. Abdul-Majeed, Mustafa H. Al-Furaiji, Inmar N Ghazi

Baghdad Science Journal

Oily wastewater is one of the most challenging streams to deal with especially if the oil exists in emulsified form. In this study, electrospinning method was used to prepare nanofiberous polyvinylidene fluoride (PVDF) membranes and study their performance in oil removal. Graphene particles were embedded in the electrospun PVDF membrane to enhance the efficiency of the membranes. The prepared membranes were characterized using a scanning electron microscopy (SEM) to verify the graphene stabilization on the surface of the membrane homogeneously; while FTIR was used to detect the functional groups on the membrane surface. The membrane wettability was assessed by measuring …

Checking Smart Contracts With Structural Code Embedding, Zhipeng Gao, Lingxiao Jiang, Xin Xia, David Lo, John Grundy

Research Collection School Of Computing and Information Systems

Smart contracts have been increasingly used together with blockchains to automate financial and business transactions. However, many bugs and vulnerabilities have been identified in many contracts which raises serious concerns about smart contract security, not to mention that the blockchain systems on which the smart contracts are built can be buggy. Thus, there is a significant need to better maintain smart contract code and ensure its high reliability. In this paper, we propose an automated approach to learn characteristics of smart contracts in Solidity, useful for repetitive contract code, bug detection and contract validation. Our new approach is based on …

Graph Learning Assisted Multi-Objective Integer Programming, Yaoxin Wu, Wen Song, Zhiguang Cao, Jie Zhang, Abhishek Gupta, Mingyan Simon Lin

Research Collection School Of Computing and Information Systems

Objective-space decomposition algorithms (ODAs) are widely studied for solvingmulti-objective integer programs. However, they often encounter difficulties inhandling scalarized problems, which could cause infeasibility or repetitive nondominatedpoints and thus induce redundant runtime. To mitigate the issue, we presenta graph neural network (GNN) based method to learn the reduction rule in the ODA.We formulate the algorithmic procedure of generic ODAs as a Markov decisionprocess, and parameterize the policy (reduction rule) with a novel two-stage GNNto fuse information from variables, constraints and especially objectives for betterstate representation. We train our model with imitation learning and deploy it ona state-of-the-art ODA. Results show that …

Learning Large Neighborhood Search Policy For Integer Programming, Yaoxin Wu, Wen Song, Zhiguang Cao, Jie Zhang

Research Collection School Of Computing and Information Systems

We propose a deep reinforcement learning (RL) method to learn large neighborhood search (LNS) policy for integer programming (IP). The RL policy is trained as the destroy operator to select a subset of variables at each step, which is reoptimized by an IP solver as the repair operator. However, the combinatorial number of variable subsets prevents direct application of typical RL algorithms. To tackle this challenge, we represent all subsets by factorizing them into binary decisions on each variable. We then design a neural network to learn policies for each variable in parallel, trained by a customized actor-critic algorithm. We …

On Analysing Student Resilience In Higher Education Programs Using A Data-Driven Approach, Audrey Tedja Widjaja, Ee Peng Lim, Aldy Gunawan

Research Collection School Of Computing and Information Systems

Analysing student resilience is important as research has shown that resilience is related to students’ academic performance and their persistence through academic setbacks. While questionnaires can be conducted to assess student resilience directly, they suffer from human recall errors and deliberate suppression of true responses. In this paper, we propose ACREA, ACademic REsilience Analytics framework which adopts a datadriven approach to analyse student resilient behavior with the use of student-course data. ACREA defines academic setbacks experienced by students and measures how well students overcome such setbacks using a quasi-experimental design. By applying ACREA on a real world student-course dataset, we …

Degree Doesn't Matter: Identifying The Drivers Of Interaction In Software Development Ecosystem, Amrita Bhattacharjee, Subhajit Datta, Subhashis Majumder

Research Collection School Of Computing and Information Systems

Large scale software development ecosystems represent one of the most complex human enterprises. In such settings, developers are embedded in a web of shared concerns, responsibilities, and objectives at individual and collective levels. A deep understanding of the factors that influence developers to connect with one another is crucial in appreciating the challenges of such ecosystems as well as formulating strategies to overcome those challenges. We use real world data from multiple software development ecosystems to construct developer interaction networks and examine the mechanisms of such network formation using statistical models to identify developer attributes that have maximal influence on …