Digital Commons Network^™

Optimisasi Viskositas Cream Cheese Dengan Penambahan Kulit Ari Psyllium (Plantago Ovata) Dan Susu Full Cream, Muhammad Fadhlillah, Agus Safari, Saadah Diana Rachman, Frida F. Isisafitri, Safri Ishmayana

Chimica et Natura Acta

Cream cheese merupakan keju yang lunak yang biasanya diproduksi melalui proses koagulasi dengan penambahan kultur starter bakteri asam laktat (BAL) yang dapat menyebabkan terjadinya kondisi asam.  Sifat unik kulit ari psyllium menjadi perhatian dalam menghasilkan produk pangan fungsional. Tujuan penelitian ini yaitu menentukan kondisi optimum penambahan kulit ari psyllium dan susu full cream dalam pembuatan cream cheese dengan Response Surface Method (RSM) menggunakan desain Central Composite Design (CCD) untuk menghasilkan dengan respon viskositas. Metode yang digunakan yaitu pembuatan cream cheese dengan penambahan starter Lactobacillus bulgaricus, kulit ari psyllium dan susu full cream sesuai rancangan RSM-CCD dan viskositas dari produk yang …

Pembuatan Material Komposit Penjernih Air Dari Campuran Perlit Dan Cangkang Pensi, Rahmiana Zein, Risa Oktaviani, Megita Febiola, Nurul Annisyah, Matlal Fajri Alif, Zilfa Zilfa

Chimica et Natura Acta

Material penjernih air dari komposit campuran perlit dan cangkang pensi telah diuji pada perbaikan kualitas air sungai Batang Muaro Kasang, Padang, Sumatera Barat. Parameter air yang dianalisis pada penelitian ini diantaranya fosfat, nitrat, nitrit, BOD, COD, TSS, dan warna. Percobaan dilakukan dengan metoda batch untuk menguji pengaruh perbandingan massa campuran perlit dan cangkang pensi, volume air dan waktu kontak. Hasil analisis menunjukan perbandingan massa komposit (campuran perlit dan cangkang pensi) yang optimum untuk penuru kadar fosfat, nitrat, dan warna yaitu (20:10) g pada volume air sungai 50 mL dan waktu kontak 60 menit dengan persen penuru kadar fosfat (66, 92%), …

Otter Tail Corporation, Heather Strese

Dissertations, Theses, and Projects

In my valuation model I gathered Otter Tail Corporation’s financial statements, historical and industry data, public information and ratio analysis from Mergent Online, Yahoo Finance and Otter Tail Corporation’s 2018 annual report. I discount the expected free cash flows at the WACC and estimate that Otter Tail Corporation’s stock is price is at USD 56.36 per share as of November 1^st, 2019, given the small difference between my estimated price per share and the current price per share in the market, and consistent with the EV/EBITDA multiple, I recommend a HOLD on the stock of the company.

Numerical Evaluation Of Effective Thermal Response Of Heterogeneous Materials, Kevin W. Irick

Mechanical Engineering ETDs

Heterogeneity in materials leads to increased complication of physics, at the level or scale where heterogeneity exists, making analysis and material behavior predictions more difficult. As a result of the intricate descriptions or understanding of the physics required to determine the behavior of a heterogenous material or system, practitioners frequently prefer the use of effective properties or responses. This body of work is dedicated to performing computational analyses on the thermal behavior of heterogeneous materials and evaluating the corresponding analyses using formal verification approaches. Custom finite element method code was used for solving the heat equation in a variety of …

Solar Insolation Micro-Forecasts Using Longwave Infrared Sensors And Artificial Intelligence, Anthony R. Menicucci

Mechanical Engineering ETDs

Solar Insolation Micro-Forecasts (SIMF) are used by Independent Service Operators (ISOs) and other grid operators to maintain constant and stable electrical grid frequency, voltage, power factor and waveform across their transmission infrastructure. Intermittent, thick, dense and typically cumulus clouds negatively impact the electrical grid by quickly turning on and off power production from large solar photovoltaic (PV) fields, causing grid stability problems between generation and load. Forecasting insolation values over large PV fields allows operators the chance to anticipate and proactively implement mitigation strategies like engaging spinning reserve from gas turbines, deploying generators, buying power in the spot market, and …

Research Productivity On Knowledge Management From Pakistan: A Study From 2000-2020, Mohammad Hussain, Muhammad Shehr Yar

Library Philosophy and Practice (e-journal)

This study examined the research productivity on Knowledge Management from Pakistan during the years 2000-2020. The study tends to determine the year-wise publications, authorship pattern, total count of citations, citations per year, most cited publications and the most prolific authors. The data for the study was extracted from Google Scholar by using bibliometric tool “Public & Perish”. The data was further analyzed on different parameters with the help of Publish & Perish and MS Excel 2016. It was found that a total of 84 documents were published during the study period. The results show that the highest number of publications …

Users’ Satisfaction With The Knowledge Acquisition In Libraries Services An Engineering College Students In Mysore City : A Study, Chandrashakara J

Library Philosophy and Practice (e-journal)

he study is focused on Knowledge Acquisition in Libraries services an Engineering College Students in Mysore city. The level of users satisfaction about library facilities and services of Engineering College Students in Mysore city. A well structured questionnaire was administered to Mysore city engineering college and collect the data regarding the Knowledge Acquisition in Libraries in Engineering College Students in Mysore city. The survey reveals that the library services in the mysore city engineering college for their users. Libraries users were also effective with the existing print resource. These resources found to be more then 50% satisfied about the Subject …

Library Resources And Research Environment In Higher Education Institutions: Students’ Satisfaction, Muhammad Shoaib, Farooq Abdullah, Nusrat Ali

Library Philosophy and Practice (e-journal)

This study aims to examine library resources and research environment in higher education institutions in terms of students’ satisfaction. The library in university has a central role in higher education in multiple ways. As the online web of knowledge is providing free of cost. However, the similar nature of services is subscribed and paid at student homes. For the present research, a quantitative study design was opted to conduct an online survey. A total of 1358 students participated from public and private sector universities to fill the questionnaire. The questionnaire was pre-tested from 30 respondents. Structural Equation Modelling (SEM) technique …

Bibliometric Survey On Effects Of Climate Change On Incidences Of Infectious Diseases, Seema Harshad Patil, Yatharth Jain, Vedant Marathe

Library Philosophy and Practice (e-journal)

^{For understanding the influx of Infectious Diseases, research of climate change and its effects pertaining to the diseases is important. The motive of this bibliometric survey is to understand the research which has been carried out regarding the aforementioned topics. This paper summarizes the research in the 21st Century from 2001 to present. We conducted this analysis using tools such as Gephi, Researchgate, Scopus, ScienceScape, Google Scholar and Mapchart. This Bibliometric Survey on “Effects of Climate Change on Infectious Diseases” showed that maximum publications are articles. These publications are from conferences and journals related to Environmental Science. The United States …}

A Bibliometric Analysis Of Minimum Quantity Lubrication As A Sustainable Approach, Shrikant U. Gunjal Mr., Sudarshan B. Sanap Dr.

Library Philosophy and Practice (e-journal)

Environment-friendly machining methods are being focused widely across the research areas concerning the consequences and challenges of the traditional methods. Flood lubrication technique which is aggressively being implemented, targeting better machining attributes of the end product. However, the devastating effects of the flood lubrication technique are causing harmful consequences to the environment majorly and the machining operator therein. Minimum quantity lubrication (MQL) which is also called Near-dry machining (NDM) is the most attributed cooling and lubrication approach which justify the sustainable requirements of the development; as it implies only 50-150 ml/hr cutting fluid under consideration. The present article presents the …

Library Usage By Faculty Members Of Benguet State University, Noel W. Cabfilan, Marjorie C. Ricardo

Library Philosophy and Practice (e-journal)

The study's objectives were to determine Benguet State University faculty members' general impression of the library resources and their usage of these resources. To answer these objectives, questions on faculty members' satisfaction with the library resources, frequency of usage, purposes of using the library resources, reasons for not using the library resources, reasons of not being able to find the resources they are looking for in the library and suggestions for library development in terms of library resources were asked.

It was found out that the majority of the faculty members have used the library resources at least once-a-term. On …

Flow Characteristics Of Surge And Design Charts For Its Computations., M. Attia, Mahmoud Mohamed El-Gamal

Mansoura Engineering Journal

Sudden load rejection at a hydropower plant causes the development of a positive surge or a hydraulic bore in the power canal. Determination of the bore height and velocity is necessary for the design of the power canal. Determination of these parameters involves the solution of higher simultaneous equations through trial and error procedure which is a laborious and time consuming process, In the present work, a computerized solution of the problem was developed and then a vast data pertaining to the practical range of hydraulic bores was analyzed. As a result, two very useful sets , of three parameter …

Effect Of Pile System Characteristics On The Caisson Breakwater Efficiency And Seabed Changes., E. Heikal, T. Salem, A. Koraim

Mansoura Engineering Journal

This paper presents the results of an experimental investigation on the effect of the characteristics of the supporting pile system which fixes the semi-immersed caisson breakwater on the breakwater efficiency and seabed changes. The efficiency of the breakwater was presented as a function of wave transmission for different wave , caisson, supporting pile system and seabed parameters. Also, the sandy bed hydrography was recorded around the breakwater and the maximum erosion and accretion were determined. It is concluded that the supporting pile system increases the efficiency of the caisson breakwater by 5 10 20 % according to the number of …

Treatment Of Concentrated Black-Water And Kitchen Organic-Wastes In Accumulation System., Tarek Abdelhamid Attea

Mansoura Engineering Journal

The feasibility of two accumulation-systems (AC) (or anaerobic digestion and storage of concentrated black-water with (ACL) or without (AC2) urine + kitchen organic-wastes were investigated the wastewater was collected by two vacuum toilet transport system. The influent-total chemical oxygen demand (COD) of the AC2 system (54000 Mg/L) was more concentrated by than thus of the ACT system. The AC systems demonstrated stable performance. There was no inhibition effect of ammonium (NH4) and volatile fatty acids (VFA) concentration decreased in time, COD, removal of 58 % was achieved in both systems, after 105 days ill 20oC. Moreover, is the supernatant in …

Properties And Bond Behavior Of Self Compacting Concrete (Scc)., A. Heniegal, W. Fahmy

Mansoura Engineering Journal

Considering the economy and the durability of our present concrete structures, the quality and the density of the concrete cover, as well as the compaction of the concrete are main parameters. For this, Self-Compacting Concrete (SCC) offers new possibilities and prospects. As a result of the mix design, some properties of the hardened concrete can be different for SCC in comparison to normal vibrated concrete (NC). Therefore, it is important to verify the mechanical properties of SCC before using it for practical applications, especially if the present design rules are applicable or if they need some modifications, The following paper …

Durability Of Concrete Confined With Gfrp Tube., W. Fahmy, A. Heniegal

Mansoura Engineering Journal

One promising innovative structural system is concrete-filled fibre reinforced polymer (FRP) tubes, which provide many unique advantages. The FRP tube acts as a stay-in place structural formwork to contain the fresh concrete, which may save the costs of . formwork and labour used by cast-in-place or pre-cast industries. At the same time, the FRP tube acts as a non-corrosive reinforcement for the concrete for flexure and shear. More importantly, the FRP lube provides confinement to the concrete in compression. which significantly improves the strength and ductility. The contained concrete is protected from severe environmental effects and deterioration resulting from moisture …

Evaluation And Prediction Of Structural Properties Of Asphalt Concrete., Mohamed Abdel-Motaleb

Mansoura Engineering Journal

The ability to characterize paving materials in terms of fundamental properties is becoming increasingly more important. This is partially due to the fact that many agencies are beginning to use pavement design system based on elastic theory. The most required inputs in the elastic theory are Elasticity modulus (E) and Poisson's ratio (u) of asphalt layer. So, the current study is primarily concerned with simplifying a technique that can be used, in pavement design phase, for predicting the expected structural properties of asphalt layer at the actual temperature and loading rate of traffic. To achieve this objective, many paving mixes …

Local Seabed Scour Around Two Rows Of Closely Spaced Piles., E. Heikal, T. Salem, A. Koraim

Mansoura Engineering Journal

The seabed changes around the pile breakwater were examined experimentally. The breakwater consists of vertical double rows of closely spaced circular piles. This is for determining the additional embedded length of the pile in the soil due to scour caused by the wave action. The seabed hydrography was recorded and the maximum scour and maximum deposition were determined for different wave conditions. Intermediate and shallow water waves were applied. It is concluded that the seabed scour reaches the maximum value when the dimensionless wave number ranged between 0.5 and 1.0 under the experiment conditions. The relative maximum scour depths around …

Modelling Pedestrians & Cyclists Interaction With Traffic Flow In Urban Areas., H. Younes, M. Owais

Mansoura Engineering Journal

Little work has been done on pedestrians and cyclists as a viable form of transport in urban areaes to assess their characteristics and their interaction with traffic. Software designed for motor vehicles and are not appropriate for modeling pedestrians and cyclists sharing the traffic this road space in busy shopping areas within the (C.B.D) of towns. There are distinct incompatibilities between traffic characteristics and pedestrians & cyclists behaviour. In this paper an attempt has been made to assess the interaction of both pedestrians and cyclists with traffic flow through a study in urban area (Assiut City C.B.D). Recommended values for …

Dispersed Photovoltaic Generator With Flexible Interface., Akram Ibrahim Elmitwally, M. Rashed

Mansoura Engineering Journal

The application of dispersed generation has a great attention nowadays due to its tangible Impacts on the operation of distribution networks, Photovoltaic array is a significant type of embedded resources. This paper presents an approach to enhance the economics of dispersed photovoltaic generators. A control strategy is proposed to extend the functionality of the electronic converter interface to serve as a versatlle power conditioner. Thereby, it can extract maximum power from the photovoltaic generator, eliminate harmonics, supply reactive power, suppress line current unbalance, and regulate the load voltage as ancillary tasks. This control algorithm is based on a hybrid synchronous …

Abnormal Harmonics Generated By Modified Hvdc Converter., Hussein Al-Majali

Mansoura Engineering Journal

Unbalance in the operation of AC/DC converters gives rise to abnormal or uncharacteristic current harmonics, in addition to the characteristic harmonics in the supply current waveforms. This paper concentrates on the analysis of uncharacteristic harmonics caused by unbalanced AC supply voltages. Attention is given to modified converter operation which uses thyristors connected to tapping points on the secondary windings of the transformer. Control of by-pass thyristor for reducing abnormal harmonic generation are discusses, and some experimental results supporting the theoretical calculations are also included.

Implementation Of Transformer Static Differential Relay With Harmonic Blocking., Mohammed El Gamal, Ahmed Lotfy, Hussien Dessouki

Mansoura Engineering Journal

In this paper a transformer static/electronic differential relay is implemented using second order active band-pass filters for detecting second harmonic ratio. Thus enabling a relay-blocking signal during transformer inrush current, also the relay allows for a fine adjustment of the differential characteristic curve to facilitate its use in variety of transformer ratings.

Beam Propagation Method Based On Fast Fourier Transform And Finite Difference Schemes And Its Application To Optical Diffraction Grating., Ahmed Samra, Bedeer Yousif

Mansoura Engineering Journal

Accurate modeling of photonic devices is essential for the development of new higher performance optical components required by current and future large or wide bandwidth communication systems. This paper introduces several key techniques for such modeling, many of which are used in commercial design tools. These include several techniques of the beam propagation methods (BPM), such as fast Fourier transform ( FFT BPM), wide angle fast Fourier transform ( WAFFT-BPM), scalar finite difference (FD-BPM), scalar wide angle finite difference beam propagation method (WAFD-BPM), Generalized Douglas finite difference (GDFD-BPM), and full vectorial finite difference beam propagation method (FVFD-BPM). The numerical simulations …

Circuit Topology Estimation In An Adaptive Protection Platform, Daniel Ruiz

Electrical and Computer Engineering ETDs

Modern electric power systems, power system protections and controls have experienced a significant change, thanks to the introduction of new technologies, such as microprocessors, GPS, communication, etc. These technologies brought an increased amount of measured-data and information flow on power grids. Adaptive protection systems have been introduced to increase the reliability, selectivity, and sensitivity of the traditional protection systems. An adaptive protection system highly relies on the communication system infrastructure to identify the latest status of power grid (e.g., circuit topology or generation level of distributed energy resources). However, when the communication links to some of the equipment are outaged …

Exponential And Hypoexponential Distributions: Some Characterizations, George Yanev

School of Mathematical & Statistical Sciences Faculty Publications

The (general) hypoexponential distribution is the distribution of a sum of independent exponential random variables. We consider the particular case when the involved exponential variables have distinct rate parameters. We prove that the following converse result is true. If for some n ≥ 2, X1, X2, . . . , Xn are independent copies of a random variable X with unknown distribution F and a specific linear combination of Xj ’s has hypoexponential distribution, then F is exponential. Thus, we obtain new characterizations of the exponential distribution. As corollaries of the main results, we extend some previous characterizations established recently …

Mesh Networking And Security Applications In Lora Ad-Hoc Networks, Derek Heeger

Electrical and Computer Engineering ETDs

The Internet of Things (IoT) has rapidly expanded into consumer and industrial applications driving the need for secure and energy efficient communications suitable for battery powered devices. Common IoT protocols developed for these applications include SigFox, Narrow-Band IoT, and Long Range (LoRa). LoRa is an energy efficient long-range communication method enabled by advanced modulation schemes. This research enables new capabilities in LoRa ad-hoc networks allowing for innovative IoT sensors that were previously infeasible due to energy constraints. This is achieved by investigating adaptive data rate (ADR) techniques, enabling reliable and secure remote firmware updates, improving LoRa authentication, and implementing a …

Towards Understanding Power Grid Resilience To Early-Time (E1) High-Altitude Electromagnetic Pulses, Rodrigo Elias Llanes

Electrical and Computer Engineering ETDs

Fast transient electromagnetic disturbances can occur in the atmosphere from natural occurrences such as lightning and solar flares as well as those from manmade events such as that associated with a nuclear bomb detonation. These radiated signals couple into the transmission lines and components within the electric power grid. This has prompted an increased interest in grid resilience to the Early-Time (E1) High-Altitude Electromagnetic Pulse (HEMP). Three activities were conducted which further grid resilience research. First, power substations in the United States were assessed to develop accurate layouts to be used in radiated transmission line coupling studies. Second, three pre-existing …

Cognitive Radios For Self-Aware And Spectrum-Agile Communications Over Wideband Spectrum, Mohamed A. Aref

Electrical and Computer Engineering ETDs

In this dissertation, we introduce a novel cognitive engine design for intelligent, self-aware and spectrum-agile communications. The targeted cognitive radio (CR) has sensing and learning abilities that incorporate advanced signal processing and machine/deep learning (ML/DL) techniques. It can operate over a heterogeneous wideband spectrum that is much wider than the ones proposed in the literature, most likely covering several hundreds of MHz. It has the ability to detect existing signals in the surrounding RF environment and identify their origins. Furthermore, it cognitively uses channel selection, transmit power control and interference cancellation to adapt its communications mode in response to observed …

Assessing Perceptions Of Group Work Using Team-Based Learning, Lauren Ferry, Phillip J. Wong, Kathryn Hogan

James Madison Undergraduate Research Journal (JMURJ)

Group work is frequently incorporated into courses; however, student perceptions of their experiences and the benefits of group work might differ based on the structure of course. In this study, we examined student perceptions of group work in a team-based learning (TBL) course. Undergraduate students completed pre- and post-surveys on their team work experiences over a semester. Students had lower agreement with the statement “working in groups usually ends up with one person doing all of the work” and higher agreement with “working in a group makes me feel as though I am part of a learning community” at post-test. …

An Accelerated Peer-To-Peer (P2p) Communication Method Facilitated By Reusing Existing P2p Paths For Low-Power And Lossy Networks, Huimin She, Harbor Dong, Wenjia Wu, Nan Yi

Defensive Publications Series

The Wireless Smart Utility Networks (Wi-SUN) alliance promotes interoperable wireless standards-based solutions for Internet of Things (IoT) deployments, such as distributed automation (DA). For some applications, such as smart utility or smart city applications, it is desirable to provide optimized peer-to-peer (P2P) routing. However, for P2P traffic within a Destination Oriented Directed Acyclic Graph (DODAG), packets either have to be routed through a root in a non-storing mode or through a common ancestor in a storing mode. Techniques herein provide for locally reusing and distributing projected directed advertisement object (P-DAO) tracks. For example, when a node receives a P-DAO track …