Digital Commons Network^™

Strategies For Resolution Enhancement In Liquid Chromatography, Shelby Lynn Weatherbee

Theses and Dissertations

Recent research in liquid chromatography (LC) has led to the development of new methodologies to further improve sample analysis. Non-uniform stationary phases are one such area that focuses on developments in selectivity and efficiency of stationary phases. Within this subset of stationary phases are two major focuses: two-dimensional liquid chromatography (2D-LC) and continuous stationary phase gradients that are the basis of this work.

In this work, LC simulation software was adapted to simulate chromatograms based on experimental and modeled injection profiles. This was done by measuring the injection profiles from a 2D-LC active solvent modulation valve using a variety of …

Continual Learning For Multi-Label Drifting Data Streams Using Homogeneous Ensemble Of Self-Adjusting Nearest Neighbors, Gavin Alberghini

Theses and Dissertations

Multi-label data streams are sequences of multi-label instances arriving over time to a multi-label classifier. The properties of the data stream may continuously change due to concept drift. Therefore, algorithms must adapt constantly to the new data distributions. In this paper we propose a novel ensemble method for multi-label drifting streams named Homogeneous Ensemble of Self-Adjusting Nearest Neighbors (HESAkNN). It leverages a self-adjusting kNN as a base classifier with the advantages of ensembles to adapt to concept drift in the multi-label environment. To promote diverse knowledge within the ensemble, each base classifier is given a unique subset of features and …

Reproducibility And Accuracy Of The Virtual Occlusal Record, Anne M. Harper

Theses and Dissertations

Purpose: To evaluate the reproducibility and accuracy of the virtual occlusal record compared to the gold standard physical bite record

Methods: Two physical bite records of PVS and two virtual bites using an iTero Element scanner were obtained from 22 participants. Intraoral scans were exported as STL files, and virtual occlusal records were created. CBCT images were taken of physical occlusal records and converted to STL files. STL files were superimposed using Geomagic Control X™ Software. Root mean square (RMS) and percent similarity within 0.25 mm tolerance were compared at a significance level of 0.05.

Results: Average …

Pushing The Limits: Increasing The Speed And Specificity Of Sars-Cov-2 Testing, Grayson Way

Theses and Dissertations

The prevalence and spread of the current COVID-19 pandemic have highlighted the importance of continual improvements upon current microbiological testing methods. Rapid and accurate testing can help mitigate spread by improving on the time to quarantine and quarantine duration required. As of the writing of this thesis, COVID-19 has been responsible for more than 500,000 deaths in the United States of America, and greater than 2 million deaths globally. The work done in this thesis has shown improvements in the current SARS-CoV-2 testing methodology by reducing the time it takes for patient testing while maintaining accuracy and the sensitivity required …

Unraveling A Trifecta Of Weak Non-Covalent Interactions: The Dissociation Energy Of The Anisole-Ammonia 1:1 Complex, John L. Loman, James T. Makuvaza, Damian L. Kokkin, Scott A. Reid

Chemistry Faculty Research and Publications

The anisole-ammonia 1:1 complex is a challenge for both experiment and theory. Early studies supported a non-planar structure, involving a trifecta of weak non-covalent interactions: N-H/O, N-H/π, and C-H/N. The calculated structure and binding energy of the complex proved remarkably sensitive to the level of theory employed. Here, we report the first experimental measurement of the ground state dissociation energy of the complex, and derive an excited (S₁) state dissociation energy that is in excellent agreement with the cutoff observed in the experimental excitation spectrum. Results are compared with previous predictions and new calculations based on benchmarked Density …

Exploring Renewable Energy Futures In Humboldt County Consistent With The Goals Of California’S Renewable Portfolio Standard, Amin M. Younes

Cal Poly Humboldt theses and projects

Humboldt County has abundant wind, solar, and biomass resources, but has made limited progress towards the state’s 2045 requirement of 100% clean electricity. A recently rejected onshore wind project showed that technically and economically viable projects can fall to social and political challenges, emphasizing the need for social considerations in renewable transitions. I therefore integrated community members’ preferences into modeling of RPS-consistent renewable energy scenarios in Humboldt County. My model suggests that offshore wind, utility-scale solar, distributed solar, and biomass power are technically and economically viable sources of significant local generation at varying costs.

In interviews with energy-engaged residents, I …

A Comparison Of The Removal Of Estrogen Between Different Wastewater Treatment Processes, Danielle J. Jones

Cal Poly Humboldt theses and projects

Pharmaceuticals are found in water systems and are classified as contaminants due to their adverse effects on numerous types of aquatic organisms. Estradiol, a natural occurring estrogen and ethinylestradiol, a common synthetic estrogen found in birth control, are a class of pharmaceuticals called endocrine-disruptive contaminants (EDC). These contaminants have been shown to cause developmental delays in fish as well as feminizing male fish in concentrations as low as 1 ng/L for both estradiol and ethinylestradiol, and bioaccumulating in mollusks and oysters. There are many natural and human-assisted methods for removing pharmaceuticals in water, and they are dependent on both the …

Response Of Coastal Ichthyoplankton Assemblages Off Northern California To Seasonal Oceanographic And Climate Variability, Blair M. Winnacott

Cal Poly Humboldt theses and projects

This study analyzed samples collected along the Trinidad Head Line (41°N) to characterize variability in the ichthyoplankton assemblage in coastal waters off northern California from late 2007 through 2019, a period during which a major marine heatwave (MHW; late 2014-16) strongly perturbed the ecosystem. I augmented visual identification with genetic techniques to resolve the species composition of visually cryptic larval rockfishes (Sebastes spp.). While taxonomic composition off northern California was largely similar to studies off Oregon and Washington, and cross-shelf structure and seasonal patterns in species’ abundance were generally consistent with the distribution and phenology of parental stocks, interannual …

On The Acceptance Of Urban Beavers In Martinez, California, Zane A. Eddy

Cal Poly Humboldt theses and projects

As ecosystem engineers, beavers construct complex riparian and wetland habitats that benefit many other species, including endangered salmonids. Through their landscape alterations, beavers also promote increased groundwater recharge and provide refugia during wildfires and high flow events by impounding water and allowing it to spread across the landscape. Prior to the North American colonial fur trapping campaigns, there were between 60 and 400 million beavers in North America. By the beginning of the 20th century, beavers were extirpated from many parts of the continent, however through human efforts, their population has since rebounded to between 10 and 15 million. The …

Effects Of Different Selection Strategies On Subsequent Breeder Performance, Slaughter,And Carcass Traits Of Japanese Quail, Sohail Ahmad, Jibran Hussain, Hafiz Muhammad Ishaq, Athar Mahmud, Shahid Sherzada, Muhammad Usman, Abdur Rehman, Muhammad Zaid

Turkish Journal of Veterinary & Animal Sciences

The present study evaluated the effect of different selection strategies in four closebred flocks (CBF) at three ages on subsequent breeder performance and carcass traits. A total of 540 Japanese quails already selected for higher body weight from four CBF (Major, Kaleem, Saadat, and Zahid) at three ages (10, 12, and 14 weeks) were subjected to 3 selection strategies (i.e. pedigree, mass selection, and randombred control). In pedigree selection, 108 birds with higher body weight were selected with full pedigree record whereas, in the mass selection, 324 birds with higher body weight were selected to be the parents of the …

An Application Of Least Square Support Vector Machine Model With Parameters Optimization For Predicting Body Weight Of Harnai Sheep Breed, Farhat Iqbal, Abdul Raziq, Zil E. Huma, Muhammad Ali Khan

Turkish Journal of Veterinary & Animal Sciences

This study utilized a model based on the least square support vector machine (LSSVM) for the prediction of body weight (BW) of sheep. Two heuristic algorithms, namely, coupled simulated annealing (CSA) and simplex method (S) were applied to tune the hyperparameters of the LSSVM model. The hybrid CSA-S-LSSVM method is then applied to the male, female and total data of the Harnai sheep breed of Pakistan. Various biometric traits such as withers height, body length, chest girth, face length, paunch circumference, ear length, the length between ears, fat tail width and fat tail length were used as predictors. Goodness of …

Trend Topics In Animal Science: A Bibliometric Analysis Using Citespace, Fatma Yardi̇bi̇, Mehmet Zi̇ya Firat, Emi̇ne Çeti̇n Teke

Turkish Journal of Veterinary & Animal Sciences

The aim of this study was the identification of trends topics in animal science in the last five years using bibliometric analysis. The research data consisted of 6972 studies published between 2015 and 2019 in the top five journals of animal science field, according to the Journal Citation Reports. The journals were analyzed in terms of number and types of publications, author, institution, country productivity, citation analysis, and citation burst. In the study, emerging trends and animal science intellectual structures were visualized with social network analysis. The evidence revealed in this study suggests that `genomic prediction' is the most effective …

Effects Of Age At Feedlot Entry On Performance, Carcass Characteristics, And Beef Qualitytraits Of Holstein Friesian Bulls Reared In High Altitude Of Eastern Turkey, Veysel Fati̇h Özdemi̇r, Mete Yanar

Turkish Journal of Veterinary & Animal Sciences

The objective of this research was to determine the effects of different initial fattening ages on the fattening performance, carcass features, and meat quality traits of Holstein Friesian bulls. A total of 24 Holstein-Friesian intact males were used in the study. The bulls were allocated to the initial fattening age groups named as Young Group (8-10 months old) (YG), Middle Aged Group (12-14 months old) (MAG) and Older Group (15-17 months old) (OG) and then placed in the feedlot based on three age groups at feedlot entry. The data that has normal distribution were analysed by using the LSMM in …

Identification Of Allelic Variants, Differential Expression, And In Silico Analysis Of Caprineserum Lysozyme Gene, Narendra Kumar Nagpal, Pushpendra Kumar, Chinmoy Mishra, Tushar Jyotiranjan, Tarun Kumar Bhattacharya, Bharat Bhushan, Arjava Sharma

Turkish Journal of Veterinary & Animal Sciences

Serum lysozyme gene empowers the immune system due to its bacteriolytic property targeting peptidoglycan layer of cell wall. Polymorphs of serum lysozyme gene are reported to be significantly associated with disease resistance traits. Two different gene fragments viz. fragment I (275 bp) and fragment II (230 bp) of serum lysozyme gene were amplified and screened by polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP) technique to identify genetic variation in two different goat breeds (Barbari and Marwari) of India. The serum lysozyme activity of different genotypes and mRNA expression across the breed was also estimated. In fragment I, four genotypes (AA, …

Effect Of Clinical Doses Of Buserelin On In Vivo Bovine Uterine Activity At Estrus, Halef Doğan, Muhterem Aydin

Turkish Journal of Veterinary & Animal Sciences

For successful fertilization, a transfer system named "rapid sperm transport" generated by uterine contractions plays a crucial role. The purpose of this in vivo study was to investigate the effect of buserelin, a GnRH agonist widely used for ovulation induction after mating or artificial insemination, on bovine uterine contractility which supports rapid sperm transport at estrus. In vivo uterine contractile activity was measured by intrauterine pressure recording technique. In the study, the spontaneous uterine contractile activities of 28 cows at estrus were observed for 30 min. The cows were randomly divided into 4 treatment groups which have 7 cows each …

The Contribution Of Neurocognitive Situation, Physical Capacity And Daily Life Activities Toquality Of Life In Childhood Acute Lymphoblastic Leukemia Survivors, Eli̇f Keleş Gülnerman, Yağmur Çam, Bülent Elbasan, Şebnem Soysal, Zühre Kaya, İdi̇l Yeni̇cesu, Ülker Koçak

Turkish Journal of Medical Sciences

Background/aim: There are no extensive studies on the QL in children who completed acute lymphoblastic leukemia (ALL) treatment and currently living without any disease in Turkey. Our study aimed to analyze both the QL and the effects of physical, neurocognitive capacities on QL in childhood ALL survivors aged 7-12 years at the time of recruitment. Materials and methods: PedsQL cancer module 3.0 child and proxy report, for ages 5-7 and 8-12 years, WeeFIM scale, BOTMP Short Form, RPM, reading, writing, and mathematics assessment tools, sociodemographic information form were carried out to the children and their family. Results: There was no …

Evaluation Of Systemic Involvement Of Coronavirus Disease 2019 Through Spleen; Size Andtexture Analysis, Abdussamet Batur, Abi̇di̇n Kilinçer, Fati̇h Ateş, Nazlim Aktuğ Demi̇r, Recai̇ Ergün

Turkish Journal of Medical Sciences

Background/aim: To investigate the changes in the spleen size, parenchymal heterogeneity, and computed tomography (CT) texture analysis features of patients diagnosed with Coronavirus disease 2019 (COVID-19) Materials and methods: The size and parenchymal structure of the spleen in 91 patients who underwent thoracic CT examination due to COVID-19 were evaluated. For the evaluation of parenchymal heterogeneity, CT texture analysis was performed using dedicated software (Olea Medical, France). The texture analysis of each case consisted of 15 first-order intensity-based features, 17 gray level cooccurrence matrix-based features, and 9 gray level run length matrix-based features. Results: A total of 91 patients (45 …

Current Community Transmission And Future Perspectives On The Covid-19 Process, Seyhan Türk, Can Türk, Ümi̇t Yavuz Malkan, Eli̇f Sena Temi̇rci̇, Mustafa Çağri Peker, İbrahi̇m Celaletti̇n Haznedaroğlu

Turkish Journal of Medical Sciences

Background/aim: COVID-19 syndrome due to the SARS-CoV-2 virus is a currently challenging situation ongoing worldwide. Since the current pandemic of the SARS-CoV-2 virus is a great concern for everybody in the World, the frequently asked question is how and when the COVID-19 process will be concluded. The aim of this paper is to propose hypotheses in order to answer this essential question. As recently demonstrated, SARS-CoV-2 RNAs can be reverse-transcribed and integrated into the human genome. Our main hypothesis is that the ultimate aim of the SARS-CoV-2 virus is the incorporation to human genome and being an element of the …

Rediscovery Of Pearly Tree Frog, Nyctixalus Margaritifer Boulenger, 1882 (Amphibia: Rhacophoridae) From Mt. Wilis After 135 Years, Bagus Priambodo, Richo Firmansyah, Dicky Candra Pranata, Afina Nur Aninnas, Muhamad Azmi Dwi Susanto, Fajar Dwi Nur Aji, Tri Wahyu Widodo, Gunawan Gunawan, Danafia Permana, Faisal Yanuar Adiba, Yuri Ristanto, Muhamad Prayogi Erfanda, Ahmad Muammar Kadafi

Turkish Journal of Zoology

For more than a century, pearly tree frog from its type locality (East Indies; Java; Mt. Wilis) are undiscovered. Current studies about the distribution of Nyctixalus margaritifer are reported as known only from West Java and Central Java. In this paper, we collected one individual of pearly tree frog, N. margaritifer in the Western part of Mt. Wilis, which belongs to Gunung Sigogor Nature Reserve, Ponorogo, East Java. This is the third specimen, which is discovered from the Mt. Wilis after the lost holotype in 1882 and the neotype in 1885. Poorly known on its ecology and its habitat preferences …

The Morphological And Morphometric Characteristics Of Alabadem Pigeons, Evren Erdem, Fatma Tüli̇n Özbaşer, Eser Kemal Gürcan, Mehmet İhsan Soysal

Turkish Journal of Veterinary & Animal Sciences

This study aimed to determine the morphological and morphometric characteristics of Alabadem pigeons, which are grown as ornamental pigeons in Edirne province, and to determine mutual traits with other indigenous pigeon breeds in Turkey by comparing with previous studies. Body weight (P < 0.001), head length (P < 0.01), head width (P < 0.05), beak length (P < 0.001), and tarsus diameter (P < 0.05) of age group III were higher than those of other age groups; however, the wingspan of age group II was greater than that of other age groups in Alabadem pigeon. Compared to other indigenous genotypes in Turkey, the Alabadem pigeon is a small-sized genotype. Alabadem pigeons were similar to Edremit butterfly pigeons and Thracian tumbler pigeons in terms of crested and blackeyed pigeons. On the other hand, the irregularly shaped mark (almond) on the head in Alabadem pigeons was similar to the wide-long irregular shaped mark on the neck of Edremit butterfly pigeons. Some basic plumage colors (black, yellow, and red) and intermediate colors (chickpea and scarlet) were identical to Alabadem pigeons and Thrace roller pigeons. Since Alabadem pigeons have many mutual characteristics with Edremit butterfly pigeons and Thracian roller pigeons, genetic studies may be recommended to determine the degree of relationship among these breeds.

Novel Fast Terminal Sliding Mode Controller With Current Constraint Forpermanent-Magnet Synchronous Motor, Yao Fang, Huifang Kong, Daoyuan Ding

Turkish Journal of Electrical Engineering and Computer Sciences

Under the noncascade structure, the balance between q-axis current constraint and dynamic performance in permanent-magnet synchronous motor system has become a critical problem. On the one hand, large transient current is required to provide high torque to achieve fast dynamic performance. On the other hand, current constraint becomes a state constraint problem, instead of governing q-axis reference current in the cascade structure directly. Aiming at this issue, a novel fast terminal sliding mode control (FTSMC)-based controller with current constraint is developed in this paper. The novelty of this scheme is related to the proposed penalty function based on interior point …

Joint Optimization Of Target Wake Time Mechanism And Scheduling For Ieee802.11ax, Mehmet Karaca

Turkish Journal of Electrical Engineering and Computer Sciences

IEEE 802.11ax as the newest wireless local area networks (WLANs) standard brings enormous improvements in network throughput, coverage and energy efficiency in densely populated areas. Unlike previous IEEE 802.11 WLAN standards where power saving mechanisms have a limited capability and flexibility, 802.11ax comes with a different mechanism called target wake time (TWT) where stations (STAs) wake up only after each TWT interval and different STAs can wake up at different time instance depending on their application requirements. As an example, for a periodic data arrival occurring in IoT applications, STA can wake up by following the data period and go …

Impact Of Hybrid Power Generation On Voltage, Losses, And Electricity Cost Indistribution Networks, Yavuz Ateş, Tayfur Gökçek, Ahmet Yi̇ği̇t Arabul

Turkish Journal of Electrical Engineering and Computer Sciences

Energy and its capacity has emerged as one of the biggest distribution challenges all over the world. The existing grid becomes insufficient along with the expansion of the consumption. Therefore, the number of distributed generation (DG) in distribution networks increases and it allows us to sell back the extra energy. However, the efficiency of energy must be maintained into optimal values from the grid to the end-users. In spite of a lot of advantages of DG units, there are some disadvantages like fluctuations in voltage, increments of power losses, wrong protection coordination, harmonic and energy quality issues etc.. If the …

Analysis And Simulation Of Efficiency Optimized Ipm Drives In Constant Torqueregion With Reduced Computational Burden, Mi̇kai̇l Koç, Selçuk Emi̇roğlu, Bünyami̇n Tamyürek

Turkish Journal of Electrical Engineering and Computer Sciences

Moving from internal combustion engine based towards electric based transportation is crucial for wide societies as they facilitate the use of green energy technologies such as wind and solar. Interior mounted permanent magnet (IPM) machines, also known as salient brushless alternating current (AC) machines, are commonly employed in traction applications as they have superior features, such as high efficiency operation, high torque, and power densities. The efficiency optimization in IPM drives is achieved by obtaining and operating at accurate and unique current angle for a certain electromagnetic torque demand. In conventional drives, the optimum current angle is obtained by online …

Determination Of Pneumonia In X-Ray Chest Images By Using Convolutionalneural Network, Özlem Polat, Zümray Ölmez, Tamer Ölmez

Turkish Journal of Electrical Engineering and Computer Sciences

Pneumonia is one of the major diseases that cause a lot of deaths all over the world. Determining pneumonia from chest X-ray (CXR) images is an extremely difficult and important image processing problem. The discrimination of whether pneumonia is of bacterium or virus origin has also become more important during the pandemic. Automatic determination of the presence and origin of pneumonia is crucial for speeding up the treatment process and increasing the patient's survival rate. In this study, a convolutional neural network (CNN) framework is proposed for detection of pneumonia from CXR images. Two different binary CNNs and a triple …

Power-Based Modelling And Control: Experimental Results On A Cart-Pole Doubleinverted Pendulum, Tuğçe Yaren, Selçuk Ki̇zi̇r

Turkish Journal of Electrical Engineering and Computer Sciences

This paper is concerned with the modeling framework based on power and control for a mechanical system that has nonlinear, unstable, and under-actuated characteristic features, based on an analogy, which is developed by using the Brayton and Moser's (BM) equations between mechanical and electrical systems. The analogy is based on a mixed-potential function generalized for BM. The mixed-potential function for a cart - pole double inverted pendulum (CPDIP) system is used as a new building block for modeling, analysis, and controller design. The analogy allows for the exact transfer of results from electrical circuit synthesis and analysis to the mechanical …

Control Synthesis For Parametric Timed Automata Under Reachability, Ebru Aydin Göl

Turkish Journal of Electrical Engineering and Computer Sciences

Timed automata is a fundamental modeling formalism for real-time systems. During the design of such real-time systems, often the system information is incomplete, and design choices can vary. These uncertainties can be integrated to the model via parameters and labelled transitions. Then, the design can be completed by tuning the parameters and restricting the transitions via controller synthesis. These problems, namely parameter synthesis and controller synthesis, are studied separately in the literature. Herein, these are combined to generate an automaton satisfying the given specification by both parameter tuning and controller synthesis, thus exploring all design choices. First, it is shown …

Information Retrieval-Based Bug Localization Approach With Adaptive Attributeweighting, Mustafa Erşahi̇n, Semi̇h Utku, Deni̇z Kilinç, Buket Erşahi̇n

Turkish Journal of Electrical Engineering and Computer Sciences

Software quality assurance is one of the crucial factors for the success of software projects. Bug fixing has an essential role in software quality assurance, and bug localization (BL) is the first step of this process. BL is difficult and time-consuming since the developers should understand the flow, coding structure, and the logic of the program. Information retrieval-based bug localization (IRBL) uses the information of bug reports and source code to locate the section of code in which the bug occurs. It is difficult to apply other tools because of the diversity of software development languages, design patterns, and development …

Novel Ofdm Transmission Scheme Using Generalized Prefix With Subcarrierindex Modulation, Yusuf Acar

Turkish Journal of Electrical Engineering and Computer Sciences

The cyclic prefix (CP) is a prefix technique widely used in orthogonal frequency division multiplexing (OFDM) systems in order to eliminate the intersymbol interference (ISI) caused by the dispersion of wireless channels. However, CP reduces the number of symbols that can be transmitted in one OFDM symbol. Therefore, CP is one of the bottlenecks of OFDM systems limiting their spectral efficiency (SE). This limitation on the SE of the classical CP-based OFDM system is the main motivation for this work to introduce a novel method. In this paper, the design of a new CP structure, which is based on the …

Determining Overfitting And Underfitting In Generative Adversarial Networksusing Fréchet Distance, Enes Eken

Turkish Journal of Electrical Engineering and Computer Sciences

Generative adversarial networks (GANs) can be used in a wide range of applications where drawing samples from a data probability distribution without explicitly representing it is essential. Unlike the deep convolutional neural networks (CNNs) trained for mapping an input to one of the multiple outputs, monitoring the overfitting and underfitting in GANs is not trivial since they are not classifying but generating a data. While training set and validation set accuracy give a direct sense of success in terms of overfitting and underfitting for CNNs during the training process, evaluating the GANs mainly depends on the visual inspection of the …