Digital Commons Network^™

Experiments And Modeling Of The Chemo-Mechanically Coupled Behavior Of Polymeric Gels, Nikola Bosnjak

Dissertations

Polymeric materials consist of mutually entangled or chemically crosslinked long njitmolecular chains which form a polymer network. Due to their molecular structure, the njitpolymeric materials are known to undergo large deformation in response to various njitenvironmental stimuli, such as temperature, chemical potential and light.

When a polymer network is exposed to a suitable chemical solvent, the solvent molecules are able to diffuse inside the network, causing it to undergo a large volumetric deformation, known as swelling. In addition to volumetric deformation, this process involves the chemical mixing of the polymer network and solvent molecules, and is typically environmentally responsive. A …

High-Speed Rail Safety Analysis Based On Dual-Weighted Complex Network, Liu Lv

Dissertations

This study uses a complex network model to analyze the causes of accidents in high-speed railway operations. By identifying the key factors that led to high-speed railway accidents, hidden safety hazards were discovered. This will help improve the operational safety of the U.S. high-speed rail line under construction.

The analysis uses the regional high-speed railway network in Guangzhou, China as a case study, including the railway (including high-speed railway) accidents that occurred in the company's jurisdiction from 2013 to 2017. With comparative analysis between general railways and high-speed railways, the changes of high-speed railway safety factors are explored. Data analysis …

Supporting User Interaction And Social Relationship Formation In A Collaborative Online Shopping Context, Yu Xu

Dissertations

The combination of online shopping and social media allow people with similar shopping interests and experiences to share, comment, and discuss about shopping from anywhere and at any time, which also leads to the emergence of online shopping communities. Today, more people turn to online platforms to share their opinions about products, solicit various opinions from their friends, family members, and other customers, and have fun through interactions with others with similar interests. This dissertation explores how collaborative online shopping presents itself as a context and platform for users' interpersonal interactions and social relationship formation through a series of studies. …

Dances And Escape Of The Vortex Quartet, Brandon Behring

Dissertations

This dissertation considers the linear stability of a one-parameter family of periodic solutions of the four-vortex problem known as 'leapfrogging' orbits. These solutions, which consist of two pairs of identical yet oppositely-signed vortices, were known to W. Gröbli (1877) and A. E. H. Love (1883) and can be parameterized by a dimensionless parameter related to the geometry of the initial configuration. Simulations by Acheson and numerical Floquet analysis by Tophøj and Aref both indicate, to many digits, that the bifurcation occurs at a value related to the inverse square of the golen ratio. Acheson observed that, after an initial period …

Online Fulfillment: F-Warehouse Order Consolidation And Bops Store Picking Problems, Wen Zhu

Dissertations

Fulfillment of online retail orders is a critical challenge for retailers since the legacy infrastructure and control methods are ill suited for online retail. The primary performance goal of online fulfillment is speed or fast fulfillment, requiring received orders to be shipped or ready for pickup within a few hours. Several novel numerical problems characterize fast fulfillment operations and this research solves two such problems. Order fulfillment warehouses (F-Warehouses) are a critical component of the physical internet behind online retail supply chains. Two key distinguishing features of an F-Warehouse are (i) Explosive Storage Policy – A unique item can be …

Characterizing Reactive Iron Mineral Coatings And Their Roles In Natural Attenuation At A Site With Historical Contamination, Han Hua

Dissertations

Reactive iron mineral coatings in redox transition zones play an important role in contaminant attenuation. These mineral coatings include poorly crystalline to crystalline iron sulfides, carbonates, and oxyhydroxides, and are a signature of the biogeochemical processes occurring. To better understand these processes, reactive iron mineral coatings are characterized in an 18-m Anaerobic Core collected from a contaminated industrial site. This study targets redox transition zones uncovered in the core. A suite of complementary analyses is applied to distinguish the surface coating mineralogy using X-ray Diffraction, X-ray fluorescence, and field-emission scanning electron microscopy (FESEM) with energy dispersive X-ray analyzer (EDX). In …

The Aging And Impacts Of Atmospheric Soot: Closing The Gap Between Experiments And Models, Ogochukwu Yvonne Enekwizu

Dissertations

The main goal of this dissertation is to generate data and parameterizations to accurately represent soot aerosols in atmospheric models. Soot from incomplete combustion of fossil fuels and biomass burning is a major air pollutant and a significant contributor to climate warming. The environmental impacts of soot are strongly dependent on the particle morphology and mixing state, which evolve continuously during atmospheric transport via a process known as aging. To make predictions of soot impacts on the environment, most atmospheric models adopt simplifications of particle structure and mixing state, which lead to substantial uncertainties. Using an experimentally constrained modeling approach, …

Performance Optimization Of Big Data Computing Workflows For Batch And Stream Data Processing In Multi-Clouds, Huiyan Cao

Dissertations

Workflow techniques have been widely used as a major computing solution in many science domains. With the rapid deployment of cloud infrastructures around the globe and the economic benefits of cloud-based computing and storage services, an increasing number of scientific workflows have migrated or are in active transition to clouds. As the scale of scientific applications continues to grow, it is now common to deploy various data- and network-intensive computing workflows such as serial computing workflows, MapReduce/Spark-based workflows, and Storm-based stream data processing workflows in multi-cloud environments, where inter-cloud data transfer oftentimes plays a significant role in both workflow performance …

Аn Optical Study Of Strain Relaxation And Interdiffusion In Znse/Zncdse Quantum Wells Modified By Γ-Irradiation, Muratbay B. Sharibaev, Kanatbay A. Ismailov, Ibrohim N. Karimov, Murodjon Z. Nosirov

Scientific Bulletin. Physical and Mathematical Research

If we turn to the literature data, it is known that the degradation of CdZnTe / ZnTe and CdZnSe /ZnSe quantum wells and usually includes two types of processes: (i) fast (as called dynamic, by analogy with the degradation of heterostructures based on A3B5 materials) - germination and propagation of extended defects from a GaAs substrate. This process in CdZnSe / ZnSe is slowed down by various technological methods (treatment of a substrate in sulfur; reduction of a damaged layer in a GaAs substrate; deposition of a GaAs epitaxial buffer layer; use of the concept of compensation of bipolar stresses; …

Local And 2-Local Derivations Of Solvable Leibniz Algebras With Null-Filiform Nilradical, Sardorbek Umrzaqov

Scientific Bulletin. Physical and Mathematical Research

In the works of Ayupov, Khudoyberdiyev and Yusupov proved that the local and 2-local derivation of solvable Leibniz algebras with model nilradical are derivations. Solvable Leibniz algebras with null-filiform nilradical are the partial case of solvable Leibniz algebras with model nilradical. However, the proof in the paper is different from model nilradical case. The derivation is a fundamental notion in mathematics. Derivations play a prominent role in algebra. There are many generalizations of derivations as antiderivation, δ-derivations, ternary derivations and (α,β,γ)-derivations. One of the important generalizations of derivation is local and 2-local derivations. Local derivations defined by Kadison, Larson and …

Obtaining, Structure And Electrophysical Properties Of The Solid Solution (Gaas1-Δbiδ)1-X-Y(Ge2)X(Znse)Y, Hotamjon Mansurov, Akramjon Boboev, Johongir Usmonov, Xushruybek Mahmudov, Dilkhayotjon Pulatjon Ugli Abdurakhimov

Scientific Bulletin. Physical and Mathematical Research

This work shows the possibility of growing a single-crystal substitutional solid solution (GaAs_1-δBi_δ)₀.₄₆(Ge₂)_0.31(ZnSe)_0.23on GaP substrates by liquid phase epitaxy from a bismuth-containing melt solution. was shown that tetrahedral bonds in the (GaAs_1-δBi_δ)₀.₄₆(Ge₂)_0.31(ZnSe)_0.23 layers are enriched with arsenide gallium molecules, and some GaAs_1-δBi_δ molecules are replaced by Ge₂ paired atoms and ZnSe molecule compounds. Experimental results showed that in the epitaxial film, the molar content of GaAs …

A Linear Differential Game With Gronwall Type Constraint, Bahromjon Samatov, Ulmasjon Soyyiboev, Adhambek Akbarov

Scientific Bulletin. Physical and Mathematical Research

In the paper, it has been investigated how Gronwall`s inequality can be used in theory of Differential Games. Here a pursuit problem of linear differential game has been studied when constraints of Gronwall type generalizing geometrical constraint imposed on control parameters of players. To solve the pursuit problem it will be proposed a parallel pursuit strategy ( -strategy) and its structure will be studied in relation to parameters. In this article, the authors` previous works will be advanced and extended. As a result of the work, the new sufficiency conditions will be suggested.

The Nebraska Water Leaders Academy Graduates’ Influence On Community Capitals And Community Capacity, Dakota W. Staggs, Mark E. Burbach, Gina S. Matkin, Cheryl Burkhart-Kriesel

School of Natural Resources: Faculty Publications

An overarching goal of the Nebraska Water Leaders Academy is to prepare a diverse group of Nebraskans from across the state to impact change in their communities by working together to solve wicked water problems. With 136 graduates from across Nebraska there is potential for graduates to effect change and impact their communities’ capitals (i.e., Built, Financial, Political, Social, Human, Cultural, and Natural). This study explored the impact of Academy graduates on their communities’ capitals and community capacity to prepare for future challenges from the perspective of graduates and community members. Findings show that Academy graduates are impacting their communities …

The Stability Of Nanobubbles And Its Application In Contaminated Sediment Treatment, Shaini Dilsha Aluthgun Hewage

Dissertations

This dissertation consists of two sections. First, nanobubbles' stability and behavior are studied using experimental and theoretical approaches. Second, nanobubbles application combined with ultrasound to remediate contaminated sediments is discussed.

The stability study consists of four sections. (i). Laboratory investigation to determine bubble size distributions and zeta potentials for different gases, pH levels, temperatures, and salt conditions. (ii). A theoretical study based on the diffused double layer theory to explain nanobubbles' behavior in different NaCl concentrations. (iii). Nanobubbles' stability in electrolyte solutions under different ion valencies using deionized water, NaCl, Na₂SO₄, Na₃PO₄, …

Modeling Mass Transfer And Chemical Reaction In Industrial Nitrocellulose Manufacturing Processes, Francis Patrick Sullivan

Dissertations

A series of models are proposed to describe the production of military grade nitrocellulose from dense cellulose materials in mixtures of nitric acid, sulfuric acid, and water. This effort is conducted to provide a predictive capability for analyzing the rate and extent of reaction achieved under a range of reaction conditions used in the industrial nitrocellulose manufacturing process for sheeted cellulose materials. Because this capability does not presently exist, nitrocellulose producers have historically relied on a very narrow range of cellulose raw materials and resorted to trial and error methods to develop processing conditions for new materials. This tool enables …

Small-Scale Dynamics Of Photospheric Magnetic Activities And Their Chromospheric Responses, Jiasheng Wang

Dissertations

The evolution of photospheric magnetic fields is considered as the fundamental source of forming atmospheric structures and triggering most solar activities, including flares and mass ejections on various scales (CMEs, jets, etc.). With the implementation of high-resolution observational instruments, small-scale details of magnetic features are recognized that can provide important information regarding the evolution in active regions and the connection between photospheric magnetic reconnection and jet-like ejections in the quiet Sun. This research takes advantage of the exceptionally high-resolution measurements of vector magnetic field and imaging observations by the Goode Solar Telescope, and UV/EUV imaging observations from space-based instruments. The …

Applied Topology Ams 528, Harrison Dekker

Library Impact Statements

No abstract provided.

Zoomprov. Improvisation Exercises For Language Learning In Online Classes With Zoom Or Similar Tech For Beginning And Intermediate Learners And Beyond, Mona Eikel-Pohen

Languages, Literatures, and Linguistics - All Scholarship

The improv language exercises in this compilation are chosen from the experience I gathered 20 years ago, but also from the amazing work of Lauren Esposito and Scranton Improv & Comedy that have been more real than anything else to me this past summer, and from Jim Ansaldo, who taught me how to structure improv exercises online. They are organized by level, referring to the Common European Framework of References for Languages. That means, A1 exercises can be conducted at the beginners level but also at all other higher levels, but B2 exercises should not be imposed upon beginners or …

Physical Parameters Of The Multiplanet Systems Hd 106315 And Gj 9827*†, Molly R. Kosiarek, David A. Berardo, Ian J. M. Crossfield, Cesar Laguna, Caroline Piaulet, Joseph M. Akana Murphy, Steve B. Howell, Gregory W. Henry, Howard Isaacson, Benjamin Fulton, Lauren M. Weiss, Erik A. Petigura, Aida Behmard, Lea A. Hirsch, Johanna Teske, Jennifer A. Burt, Sean M. Mills, Ashley Chontos, Teo Močnik, Andrew W. Howard, Michael Werner, John H. Livingston, Jessica Krick, Charles Beichman, Varoujan Gorjian, Laura Kreidberg, Caroline Morley, Jessie L. Christiansen, Farisa Y. Morales, Nicholas J. Scott, Jeffrey D. Crane, Sharon Xuesong Wang, Stephen A. Shectman, Lee J. Rosenthal, Samuel K. Grunblatt, Ryan A. Rubenzahl, Paul A. Dalba, Steven Giacalone, Chiara Dane Villanueva, Qingtian Liu, Fei Dai, Michelle L. Hill, Malena Rice, Stephen R. Kane, Andrew W. Mayo

Information Systems and Engineering Management Research Publications

HD 106315 and GJ 9827 are two bright, nearby stars that host multiple super-Earths and sub-Neptunes discovered by K2 that are well suited for atmospheric characterization. We refined the planets' ephemerides through Spitzer transits, enabling accurate transit prediction required for future atmospheric characterization through transmission spectroscopy. Through a multiyear high-cadence observing campaign with Keck/High Resolution Echelle Spectrometer and Magellan/Planet Finder Spectrograph, we improved the planets' mass measurements in anticipation of Hubble Space Telescope transmission spectroscopy. For GJ 9827, we modeled activity-induced radial velocity signals with a Gaussian process informed by the Calcium II H&K lines in order to more accurately …

The Effectiveness Of Family Welfare Movement Program In Slums, Asih Kuswardinah

Jurnal Pendidikan Vokasi

Demands for family needs are increasing along with the changing times and science. Thus, Family Welfare Program or Program Kesejahteraan Keluarga (PKK) is nationally aimed to empower families to improve prosperity towards faith and devotion to God; virtuous morality; health; prosperity; independence; gender equality, justice; legal and environmental awareness. This paper aims to provide a descriptive picture to PKK Deliksari management about the level of implementation of the members of each workgroup program (I, II, III, IV); give a picture to PKK management about which workgroup is responded mostly by members; provide an overview of the skills education that is …

Implementation Of Soft Skills On Automotive Engineering Practicum Of State Vocational High Schools In West Lombok Regency, Aprian Firmansyah, Soeharto Soeharto

Jurnal Pendidikan Vokasi

This research aims to reveal the implementation of soft skills in the expertise program of automotive workshop at vocational high schools (VHS) in West Lombok Regency in terms of (1) student condition and practicum lesson planning, and (2) level of soft skills in automotive technology practicum of VHS students. This research is quantitative research with a descriptive approach. The research population is all state vocational high schools (SVHS) of light vehicle technology in West Lombok. The sample is four vocational high schools with 84 grade XII students and four teachers established using the purposive sampling technique. The research finding shows …

Parenting And Sharenting Communication For Preventing Juvenile Delinquency, Suranto Aw, Pratiwi Wahyu Widiarti, Benni Setiawan, Normah Mustaffa, Mohd Nor Shahizan Ali, Chatia Hastasari

Informasi

The focus of this research is to examine the communication techniques between parents and children in the context of parenting and giving advice (sharenting) for the prevention of children or adolescents' delinquency. The informants of this research were students, teachers, parents, and community leaders from two countries (Indonesia and Malaysia). Data were collected utilizing the focus group discussion techniques via Zoom meeting platform. Data were analyzed using interactive analysis which includes four stages, namely: data collection, data reduction, display data, and drawing a conclusion/verification. The results show that parenting and sharenting communication are strategic forums to guide adolescents to avoid …

The Effectiveness Of The Application Of Articulate Storyline 3 Learning Object On Student Cognitive On Basic Computer System Courses, I Gede Partha Sindu, Gede Saindra Santyadiputra, Agus Aan Jiwa Permana

Jurnal Pendidikan Vokasi

This study aimed to determine the effectiveness of applying learning objects based on Articulate Storyline 3 on student cognitive competence in the Basic Computer System course in the Informatics Engineering Education Study Program at the Ganesha University of Education. This type of research was descriptive quantitative with a pre-experimental research design involving one experimental class. The populations used in this study were all semester 1 students of the Informatics Engineering Education study program in the Basic Computer Systems course in the odd semester of the 2020-2021 academic year. Random sampling was using a simple random sampling technique. The average pretest …

Quality Analysis Of Teacher-Made Tests In Financial Accounting Subject At Vocational High Schools, Heni Mulyani, Heraeni Tanuatmodjo, Rangga Iskandar

Jurnal Pendidikan Vokasi

Assessment of student learning outcomes needs to be done using tests that meet the criteria for quality tests. This study aims to determine the quality of teacher-made tests on financial accounting subjects in Vocational High Schools. This research is descriptive research with a quantitative approach. Data collected are questions made by 32 teachers, answer sheets from 689 Accounting students. The validity of objective and essay tests using product-moment correlation. Reliability of the objective test using the KR20 formula, while the essay test using Alpha formula. Difficulty level and distinguishing power of objective tests using Anates 4. Difficulty level and distinguishing …

Developing Project-Based Learning Tools For Light Vehicle Engine Maintenance Subjects At Vocational High School, Muslim Muslim, Ambiyar Ambiyar, Dedi Setiawan, Rido Putra

Jurnal Pendidikan Vokasi

This study aims to develop learning tools for project-based light vehicle engine maintenance and describe the teacher's response to the application of project-based learning tools in light vehicle engine maintenance subjects. This research is a research and development (R&D) model with ADDIE. The ADDIE development model consists of analysis, design, development, implementation, and evaluation. The results showed that the product developed was valid in terms of validity, very practical in terms of practicality, and very high in the aspect of effectiveness. Based on the aspects of validity, it can be specified that the syllabus gets a percentage score of 90.25%, …

The Readiness Of Teacher Candidates For Vocational High School In The 4th Industrial Era Viewed From Teaching Skill And Capability In Technology, Susanti Susanti, Harti Harti, Vivi Pratiwi

Jurnal Pendidikan Vokasi

This study aims to evaluate the readiness of prospective teachers for Vocational High Schools in dealing with the world of work in the 4^th industrial era when viewed from teaching skills and technological mastery abilities. This study is evaluative research with a quantitative descriptive approach. The population in this study consisted of 1,725 students at Universitas Negeri Surabaya. A total of 996 students were used as research samples by using a simple purposive sampling technique. The results show that the average readiness in the aspects of teaching skills as much as 81.78% of students said they are ready, while …

Stakeholder Collaboration To Build Peace Through Public Interest Relations (Pir) (Study On The Commemoration Of Suran Agung Conflict In Madiun), Rediaz Rakhman Johan, Sri Hastjarjo, Ignatius Agung Satyawan

Informasi

Madiun Regency is one area that has a lot of active silat colleges, there are 14 (fourteen) silat colleges, mostly based in Madiun. In the dynamics of Madiun pencak silat development, there is Suran Agung tradition as a form of local wisdom in every pencak silat college at the suro month. The activity involved mass mobilization, the escalation of conflict between members of the martial arts college and communities also increased. The history of the conflict began when there was fanaticism of teachings from the Ki Ngabei Soerodiwiryo students. Conflicts that occurred in the Suran Agung involved between groups of …

Description Of Student Science Process Skills On Temperature And Heat Practicum, Tanti Tanti, Dwi Agus Kurniawan, Rahmi Putri Wirman, Retno Wulan Dari, Eva Yuhanis

Jurnal Penelitian dan Evaluasi Pendidikan

This study aimed to describe the science process skills of Senior High School 8 Muaro Jambi students on temperature and heat material (shape changes). The approach used in this study is an approach with a quantitative method that uses a research design using Survey Research design. The sample used in this study was Senior High School 8 Muaro Jambi, totaling 96 students of grade XI MIPA 1 to XI MIPA 3 odd semester 2019/2020. Data collection techniques in this study were observation and interviews. The observations of students' mastery of science process skills showed a percentage of 55.2% classified as …

Pengaruh Penerapan Model Pembelajaran Savi (Somatic, Auditory, Visual, Intellectual) Terhadap Kemampuan Berpikir Kreatif Matematis, Sang Ayu Made Monik Kencanawati, Sariyasa Sariyasa, I Gusti Nyoman Yudi Hartawan

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

Mendeskripsikan pengaruh model pembelajaran SAVI (Somatic, Auditory, Visual, Intellectual) terhadap kemampuan berpikir kreatif matematis siswa adalah tujuan dari penelitian ini. Penelitian ini merupakan eksperimen semu dengan post-test only control group design. Dari 436 siswa kelas VII SMP Negeri 4 Denpasar yang menjadi populasi, dipilih secara acak 80 siswa sebagai sampel penelitian. Data kemampuan berpikir kreatif matematis siswa diperoleh melalui tes uraian yang diberikan kepada siswa di akhir penelitian. Analisis data dilakukan menggunakan uji- satu arah pada dua sampel independen pada taraf signifikan 5%. Berdasarkan hasil analisis statistik deskriptif diperoleh rata-rata kemampuan berpikir kreatif matematis …

Analisis Kesalahan Siswa Dalam Menyelesaikan Soal Cerita Matematika Berdasarkan Kriteria Watson, Laely Mafruhah, Arif Muchyidin

PYTHAGORAS : Jurnal Matematika dan Pendidikan Matematika

Tujuan dari penelitian ini adalah untuk mendeskripsikan kesalahan yang dilakukan oleh siswa dalam menyelesaikan soal cerita matematika berdasarkan kriteria Watson dan faktor-faktor yang menyebabkan siswa melakukan kesalahan tersebut. Penelitian ini merupakan penelitian deskriptif kualitatif dengan melibatkan 44 siswa kelas VII MTs Yapik Sindangjawa, Cirebon sebagai subjek penelitian. Data jenis kesalahan dan faktor yang menyebabkan siswa melakukan kesalahan dalam menyelesaikan soal cerita matematika diperoleh melalui tes penyelesaian masalah berbentuk soal cerita matematika dan pedoman wawancara. Hasil penelitian menunjukkan bahwa subjek dalam penelitian ini melakukan kesalahan yang bervariasi dari delapan jenis kesalahan yang ada pada kriteria Watson. Jenis kesalahan yang sering dilakukan …