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Articles 2581 - 2610 of 253277
Full-Text Articles in Life Sciences
Three Fundamental Challenges To The Advancement Of Stemflow Research And Its Integration Into Natural Science, John T. Van Stan Ii, Juan Pinos
Three Fundamental Challenges To The Advancement Of Stemflow Research And Its Integration Into Natural Science, John T. Van Stan Ii, Juan Pinos
Biological, Geological, and Environmental Faculty Publications
Plant canopies divert a portion of precipitation to the base of their stems through "stemflow", a phenomenon that influences the canopy water balance, soil microbial ecology, and intrasystem nutrient cycling. However, a comprehensive integration of stemflow into theoretical and numerical models in natural science remains limited. This perspective examines three unresolved, fundamental questions hindering this integration, spanning the canopy to the soil. First, the precise source area within the canopy that generates stemflow is undefined. Thus, we asked, "whence stemflow?" Current common assumptions equate it to the entire tree canopy, a potentially misleading simplification that could affect our interpretation of …
Gamma Sigma Delta, Nebraska Chapter Newsletter, Issue #63 January 2024
Gamma Sigma Delta, Nebraska Chapter Newsletter, Issue #63 January 2024
Gamma Sigma Delta, Nebraska Chapter: Newsletters
President's message, Paul E. Read
Gamma Sigma Delta committees 2024
2022 chapter awards: The Honor Society of Agriculture, Gamma Sigma Delta
New members inducted
Annual dues notice, Robert J. Wright, membership Coordinator
Membership list
Membership renewal form
Gamma Sigma Delta, Nebraska Chapter Outstanding Graduate & Undergraduate Student Award Fund
In memoriam: Dennis Lee Kahl (February 8, 1950-August 12, 2020); Col. Warder L. Shires (March 23, 1932-March 6, 2021); Dr. Leland "Lee" Julius Albert Volker (October 24, 1942-March 11, 2022); Richard "Dick" Dam (September 17, 1929-September 17, 2022); John W. Doran (November 12, 1945-November 30, 2022); Donald H. Steinegger (January 1, …
Entomologists Require Ethical Guidance For Compassionate Management Of Delusional Parasitosis Cases, Kathleen Murphy-Hollies, Michael Skvarla, Robin M. Verble
Entomologists Require Ethical Guidance For Compassionate Management Of Delusional Parasitosis Cases, Kathleen Murphy-Hollies, Michael Skvarla, Robin M. Verble
Biological Sciences Faculty Research & Creative Works
No abstract provided.
Capture History Data From Hair Snare Sampling Of Wild Pigs In Mississippi, Tyler S. Evans, Eric T. Hileman, Melanie R. Boudreau, Bronson K. Strickland, Raymond B. Iglay
Capture History Data From Hair Snare Sampling Of Wild Pigs In Mississippi, Tyler S. Evans, Eric T. Hileman, Melanie R. Boudreau, Bronson K. Strickland, Raymond B. Iglay
College of Forest Resources Publications and Scholarship
Capture histories of wild pigs (Sus scrofa) identified using nuclear DNA markers from hair snare samples activated on the Sam D. Hamilton Noxubee National Wildlife Refuge in Mississippi between 2021 and 2022. Hair snares were active for 8 weeks (occassions) with non-grain attractants placed at the center of each snare. Dat includes unique pig identifiers (Pig_ID), capture histories (Capture_Occassion), and associated capture year (Group).
Female Biology, Jennifer Dever
Female Biology, Jennifer Dever
All USF Faculty Authored Books
Over twenty years ago I developed a course for the upper- level biology major at the University of San Francisco called
Female Biology. This was from what I perceived as a gap in the undergraduate biology curriculum- students were not learning about the evolutionary aspects of being female and studying the specific health-related issues unique to women. The information in the most widely used general biology textbooks written from a male perspective, focuses on research gained from male models by work conducted in male-led laboratories. There still exists a problem with a lack of adequate representation of women in biomedical …
Older Adult Compendium Of Physical Activities: Energy Costs Of Human Activities In Adults Aged 60 And Older, Erik A. Willis, Stephen D. Herrmann, Mary Hastert, Chelsea L. Kracht, Tiago V. Barreira, John M. Schuna Jr., Zhenghua Cai, Minghui Quan, Scott A. Conger, Wendy J. Brown, Barbara E. Ainsworth
Older Adult Compendium Of Physical Activities: Energy Costs Of Human Activities In Adults Aged 60 And Older, Erik A. Willis, Stephen D. Herrmann, Mary Hastert, Chelsea L. Kracht, Tiago V. Barreira, John M. Schuna Jr., Zhenghua Cai, Minghui Quan, Scott A. Conger, Wendy J. Brown, Barbara E. Ainsworth
Kinesiology Faculty Publications and Presentations
Purpose: To describe the development of a Compendium for estimating the energy costs of activities in adults ≥60 years (OA Compendium).
Methods: Physical activities (PAs) and their metabolic equivalent of task (MET) values were obtained from a systematic search of studies published in 4 sport and exercise databases (PubMed, Embase, SPORTDiscus (EBSCOhost), and Scopus) and a review of articles included in the 2011 Adult Compendium that measured PA in older adults. MET values were computed as the oxygen cost (VO2, mL/kg/min) during PA divided by 2.7 mL/kg/min (MET60+) to account for the lower resting metabolic rate …
Inverse Association Between Exercising Blood Pressure Response And Left Ventricular Chamber Size And Mass In Women Who Habitually Resistance Train, Evan L. Matthews
Inverse Association Between Exercising Blood Pressure Response And Left Ventricular Chamber Size And Mass In Women Who Habitually Resistance Train, Evan L. Matthews
Research Data
Excel document of research data.
A Comparison Of Adenosine Triphosphate With Other Metrics Of Microbial Biomass In A Gradient From The North Atlantic To The Chesapeake Bay, Alexander B. Bochdansky, Amber A. Beecher, Joshua R. Calderon, Alison N. Stouffer, Nyjaee N. Washington
A Comparison Of Adenosine Triphosphate With Other Metrics Of Microbial Biomass In A Gradient From The North Atlantic To The Chesapeake Bay, Alexander B. Bochdansky, Amber A. Beecher, Joshua R. Calderon, Alison N. Stouffer, Nyjaee N. Washington
OES Faculty Publications
A new, simplified protocol for determining particulate adenosine triphosphate (ATP) levels allows for the assessment of microbial biomass distribution in aquatic systems at a high temporal and spatial resolution. A comparison of ATP data with related variables, such as particulate carbon, nitrogen, chlorophyll, and turbidity in pelagic samples, yielded significant and strong correlations in a gradient from the tributaries of the Chesapeake Bay (sigma-t = 8) to the open North Atlantic (sigma-t = 29). Correlations varied between ATP and biomass depending on the microscopic method employed. Despite the much greater effort involved, biomass determined by microscopy correlated poorly with other …
From Rain Drops To Rivers: Unraveling Aridification's Influence On Coastal Stream Ecosystem Dynamics, Sean Kelly Kinard
From Rain Drops To Rivers: Unraveling Aridification's Influence On Coastal Stream Ecosystem Dynamics, Sean Kelly Kinard
Dissertations, Theses, and Masters Projects
This dissertation addresses the escalating threat of aridification to global freshwater ecosystems due to anthropogenic climate change, focusing on South-Central Texas, USA, using a space-for-time approach along a precipitation gradient from semi-arid to sub-humid. Over the 2017-2020 survey period, I integrated community, stable isotope, climate, and hydrologic data.In Chapter 2, my initial assessment of fish and invertebrate communities along the precipitation gradient unveiled compositional shifts and other nuanced responses. Positive correlations between fish diversity and rainfall, coupled with unexpected invertebrate diversity patterns, underscored the role of water quality in shaping fish assemblages. Drier conditions imposed abiotic filters, reducing diversity and …
Policy Recommendations For Tire Additive 6ppd And Its Derivative 6ppd-Q, Ashley E. King
Policy Recommendations For Tire Additive 6ppd And Its Derivative 6ppd-Q, Ashley E. King
Dissertations, Theses, and Masters Projects
Around 3.1 billion tires are produced around the world annually1. The antioxidant additive, 6PPD (i.e., N-(1,3-dimethylbutyl)-N’-phenyl-p-phenylenediamine) is widely employed in passenger and commercial vehicle tires at 0.4-2% by mass to impede tire degradation2. Antioxidants are intended to migrate to tire surfaces and form protective films to prevent rubber oxidation. 6PPD is designed to react with oxidant species like ozone, intentionally forming chemical transformation products that can then escape from the tire and into the environment. 6PPD-Q (i.e., 2-anilino-5-[(4-methylpentan-2-yl)amino]cyclohexa-2,5-diene-1,4-dione) is one such transformation product.
After release and disbursement in the environment, 6PPD-Q is bioavailable to aquatic animals and mammals and acute …
Loss Of Courtship Suppression Memory In A Drosophila Melanogaster Model Of Alzheimer’S Disease, Eric Robles, Johannes Berlandi, Chris Ellis, Tianyi Wu, Astrid Jeibmann, Fang-Ju Lin
Loss Of Courtship Suppression Memory In A Drosophila Melanogaster Model Of Alzheimer’S Disease, Eric Robles, Johannes Berlandi, Chris Ellis, Tianyi Wu, Astrid Jeibmann, Fang-Ju Lin
Biology
Alzheimer’s disease (AD) is the most prevalent and lethal neurodegenerative disease. Memory loss and motor dysfunction are accompanied by pathological hallmarks like neurofibrillary tangles or amyloid plaques. In this study, courtship suppression assay was used to assess learning and memory of a transgenic Drosophila melanogaster (the fruit fly) line expressing human Amyloid beta 42 (Aβ42). At young age (4–6 days old), both parental control and AD flies displayed lower courtship indices during training after being rejected by previously mated females. However, in the subsequent testing phase, young AD flies showed compromised recall memory, unlike that of parental controls. Neither control …
Unsung Heroes In Conservation: Evaluating The Limitations Faced By New England Wildlife Rehabilitation Centers And Proposing Solutions For Their Support And Recognition, Shaylee M. Sarmiento
Unsung Heroes In Conservation: Evaluating The Limitations Faced By New England Wildlife Rehabilitation Centers And Proposing Solutions For Their Support And Recognition, Shaylee M. Sarmiento
Honors Theses and Capstones
Wildlife rehabilitation is an often-unacknowledged practice within the overarching field of wildlife protection and conservation. This practice involves the treatment and hopeful release of wild animals affected by various ailments. With the continued expansion of and interest in the field, it could be assumed that wildlife rehabilitation is supported and funded by government bodies, but this is not the case. Because of the lack of funding and resources, many wildlife rehabilitation centers cannot achieve their full rehabilitative potential and expand their reach in the conservation world. Additionally, an absence of support leads critics to question the ethical standards of wildlife …
Density Dependent Calling Behavior In North Pacific Humpback Whales, Lucas J. Anderson
Density Dependent Calling Behavior In North Pacific Humpback Whales, Lucas J. Anderson
Honors Theses and Capstones
Animal density can define factors such as mating success, food acquisition, and communication. Inferring animal density from vocal rates is an important tool for estimating abundance and space use in difficult-to-study species like marine mammals and requires an understanding of the relationship between social context and calling rates. The goal of this project was to investigate the relationship between animal density and call rate in Southeast Alaskan humpback whales (Megaptera novaeangliae). Passive acoustic monitoring data were collected along with visual observations gathered near Frederick Sound and Stephen’s Passage, Southeast Alaska, over two summers (2019, 2022). Observers watched whales …
Utilizing Plasmid Dna Hydrogels For Cell-Free Protein Production, Tinotenda Duche
Utilizing Plasmid Dna Hydrogels For Cell-Free Protein Production, Tinotenda Duche
Honors Theses and Capstones
Proteins play an important role in various biological processes and are crucial components in biomedical research and therapeutics. Cell-free protein synthesis (CFPS) has provided a valuable approach for rapid protein production outside living cells, involving both transcription and translation processes. However, traditional CFPS methods encounter challenges such as high cost, relatively low yields, and scalability. The end goal of our project is to incorporate our template into the hydrogel. In this work, we report advancements towards that by trying to optimize our solution of CFPS. Unfortunately, the standards for pDNA hydrogel synthesis are not met by the pDNA production and …
Alpaca Assisted Activities In The New England Alpaca Industry: A Possible Solution To Farm Profitability And Participant Mental Health, Ashley Michele Masse
Alpaca Assisted Activities In The New England Alpaca Industry: A Possible Solution To Farm Profitability And Participant Mental Health, Ashley Michele Masse
Honors Theses and Capstones
The high operating costs of the New England alpaca industry were putting the majority of alpaca farmers in this region in a state of financial loss. On a separate note, American communities were experiencing a prevalence of anxiety and depression. What if a single solution could help improve the outcome of both these challenges that seem to have little to do with each other? Alpaca Animal Assisted Activities (alpaca AAAs) was a possible solution. This study explored New England alpaca farm profitability and alpaca AAAs in a way no other research study has done before. A Farmer Survey was mailed …
Equine Rescue Success In The United States: A Statistical Analysis, Carly J. Cave
Equine Rescue Success In The United States: A Statistical Analysis, Carly J. Cave
Honors Theses and Capstones
The high inflation that has characterized the post-pandemic period in the United States has increased the costs of horse ownership for private owners and equine rescue organizations, which are facing critical pressures. Over 200,000 equines are at risk for neglect or slaughter in the United States each year, which far exceeds the capacity to house these equines at rescue organizations. While demand on these organizations is high, their ability to afford appropriate resources for their care is insufficient. This study examined geographical and economic factors that impact equine rescues’ success in taking in at-risk equines and adopting them to forever …
Distribution Of Tick Species On Free-Ranging Ungulates In Northern New England, Karisa Graham
Distribution Of Tick Species On Free-Ranging Ungulates In Northern New England, Karisa Graham
Honors Theses and Capstones
In Northern New England, ungulates are often parasitized by ticks, which is one of the leading causes for the decline in population. Ungulates are a good host for ticks, specifically deer ticks and winter ticks, and these ticks cause many tick-borne diseases in humans as well. The purpose of this study was to assess passive sampling from harvested animals as a means of tick surveillance in Vermont and New Hampshire. Ticks were collected from deer and moose and mapped throughout the two states by ArcGIS to visualize the trends in distribution. Relative abundance was greater in southeastern Vermont, with no …
Investigation Of The Effects Of Ocean Acidification On Juvenile Homarus Americanus Feeding Behavior, Sophia Roy
Investigation Of The Effects Of Ocean Acidification On Juvenile Homarus Americanus Feeding Behavior, Sophia Roy
Honors Theses and Capstones
Climate change has led to increased CO2 absorption by ocean surface waters, resulting in decreased pH levels, a phenomenon known as ocean acidification (OA). A primary class of marine organism behavior is impacted by OA, in particular, olfactory-mediated behaviors related to foraging and feeding success. However, the biological mechanisms responsible for the documented impairment of foraging and feeding-related behaviors remains in question. We find that juvenile American lobsters (H. americanus) exhibit significantly faster rates of total feeding times in response to short-term low pH exposure. However, total search time and total handling time were not affected by pH when examined …
Financial Considerations For U.S. Equine Rescues: A Comparison Of Adoption-Based Vs. Sanctuary-Based Organizations, Carolyn V. Frank
Financial Considerations For U.S. Equine Rescues: A Comparison Of Adoption-Based Vs. Sanctuary-Based Organizations, Carolyn V. Frank
Honors Theses and Capstones
No abstract provided.
The Continuation Of Thoroughbred Racing: A Dual Mission, Isabella V. Williams
The Continuation Of Thoroughbred Racing: A Dual Mission, Isabella V. Williams
Honors Theses and Capstones
Thoroughbred racing is the highest-profile segment of the equine industry in the United States and around the world, accounting for 50% of industry jobs and 25% of industry revenue. Public interest in the sport is rising thanks to social media and celebrity involvement at marquee events like the Kentucky Derby, leading to increased scrutiny of the sport, posing a high risk to human and equine participants alike. Public outcry at equine injuries in particular threatens the sport’s social license to operate (SLO), making it critical to protect the “whole-life welfare” of the animals involved in the sport to ensure its …
Prospective Associations Of Fish Consumption In Cognitive Function And Depressive Symptoms Among Puerto Rican Adults, Johanna Grace Koroma
Prospective Associations Of Fish Consumption In Cognitive Function And Depressive Symptoms Among Puerto Rican Adults, Johanna Grace Koroma
Honors Theses and Capstones
Johanna Koroma, Anne Bodenrader, and Sherman Bigornia
Objectives
Fish intake has been linked to certain neural benefits, specifically in slowing cognitive decline and attenuating depressive symptoms. However, existing evidence is conflicting and insufficient. The present study aimed to investigate the association of fish consumption with depressive symptoms and cognitive function among Puerto Rican adults.
Methods
Data is acquired from the Boston Puerto Rican Health Study, comprised of 1517 adults residing in the Boston Metro Area. Dietary patterns were evaluated using a validated food frequency questionnaire (FFQ) with follow-up surveys conducted 2 years from baseline. Consumption was organized into quartiles based …
A 10-Gb/S Single-Loop Half-Rate Dll-Based Clock And Data Recovery Circuit For Forwarded-Clock Wireline Transceivers, Abdallah K. Mohamed, Sameh A. Ibrahim, Mohy Eldin A. Abo-Elsoud
A 10-Gb/S Single-Loop Half-Rate Dll-Based Clock And Data Recovery Circuit For Forwarded-Clock Wireline Transceivers, Abdallah K. Mohamed, Sameh A. Ibrahim, Mohy Eldin A. Abo-Elsoud
Mansoura Engineering Journal
This paper introduces a 10-Gb/s single-loop, half-rate delay-locked loop (DLL)-based clock and data recovery (CDR) circuit for forwarded-clock (FC) wireline transceivers. The proposed CDR employs a differential ring oscillator (RO) with sub-feedback loops structure for multi-phase clock generation with a single-loop operation. An Alexander phase detector utilizing a flip-flop based on an improved true single-phase clock (TSPC) logic with split outputs is adopted. The proposed DLL-based CDR is an optimized solution in terms of area and power for FC wireline transceivers. The recovered clock exhibits an RMS jitter of 590 fs and a peak-to-peak jitter of 3.8 ps. The circuit …
Application Of Machine Learning Models In The Capacity Prediction Of Ccfst Columns, Khaled Megahed, Nabil Said Mahmoud, Saad Elden Mostafa Abd-Rabou
Application Of Machine Learning Models In The Capacity Prediction Of Ccfst Columns, Khaled Megahed, Nabil Said Mahmoud, Saad Elden Mostafa Abd-Rabou
Mansoura Engineering Journal
Circular concrete-filled steel tubular (CCFST) columns are widely utilized in structural engineering due to their impressive load-bearing capabilities and ductility. Existing design standards often yield disparate outcomes when applied to structural columns with identical properties, introducing uncertainty for engineering designers. This study introduces an innovative technique to address these challenges using two machine learning (ML) models: Gaussian process regression (GPR) and extreme gradient boosting (XGBoost). These models consider various input variables, including the geometric and material properties of CCFST columns, to estimate the compressive strength. The models undergo training and evaluation using two datasets comprising 1004 axially loaded CCFST columns …
Numerical And Analytical Solution For Nonlinear Free Vibration Of Tapered Beams, Zain Abu Shaeer Abu Shaeer, Ramy I. Shahin, Galal I. El-Baghdady, Saad A. Yehia
Numerical And Analytical Solution For Nonlinear Free Vibration Of Tapered Beams, Zain Abu Shaeer Abu Shaeer, Ramy I. Shahin, Galal I. El-Baghdady, Saad A. Yehia
Mansoura Engineering Journal
This study introduces a computational approach that combines numerical and semi-analytical methods to solve tapered beams' nonlinear free vibration equation. The study employs a numerical approach that relies on the cubic B-spline collocation method and an approximation technique known as the Homotopy perturbation method to approximate the solution to the equation governing nonlinear large-amplitude free vibrations of tapered beams. The effect of vibration amplitude on the frequency of nonlinear vibrations is investigated. The next step is to look at different ways to get close to exact solutions across the whole range of oscillation amplitude. This will show how useful and …
An Enhanced Lane Detection Technique Based On Active Learning, Ahmed M. Radwan, Amira Y. Haikal, Hisham E. Gad, Mohamed M. Abdelsalam
An Enhanced Lane Detection Technique Based On Active Learning, Ahmed M. Radwan, Amira Y. Haikal, Hisham E. Gad, Mohamed M. Abdelsalam
Mansoura Engineering Journal
The lane detecting algorithm plays a major role in advanced driver assistance systems (ADAS) and autonomous driving systems. In recent years, deep learning-based lane detection techniques have shown encouraging results; nonetheless, the quality and size of the training data set has a significant impact on how effective these techniques are. Active learning is a technique that can improve the capacity of deep learning-based lane identification systems to repeatedly choose and classify valuable samples from a large body of unlabeled data. In this research, a novel 1-dimensional deep learning approach is used to present an augmented Active Learning based Lane Detection …
Machine Learning-Based Prediction Of International Roughness Index For Continuous Reinforced Concrete Pavements, Ragaa T. Abd El-Hakim, Ahmed N. Awaad, Sherif M. El-Badawy
Machine Learning-Based Prediction Of International Roughness Index For Continuous Reinforced Concrete Pavements, Ragaa T. Abd El-Hakim, Ahmed N. Awaad, Sherif M. El-Badawy
Mansoura Engineering Journal
The International Roughness Index (IRI) serves as a crucial indicator for ride quality and user comfort. As road roughness escalates, road serviceability diminishes, resulting in reduced vehicle speed and increased travel time, and consequently higher carbon dioxide emissions. Predicting the IRI is of utmost importance for Pavement Management Systems and sustainable development overall. While numerous studies have forecasted the IRI of flexible pavements, there is a notable scarcity of research focusing on rigid pavement performance prediction. This study addresses the gap in predicting IRI for Continuous Reinforced Concrete Pavements (CRCP), an understudied aspect of pavement engineering. Leveraging the Long-Term Pavement …
Study The Application Of Different Building Technology Systems Case Study: A Residential Villa In Al-Qassim Region, Ksa, Ahmed Abdelmonteleb M. Ali, Essam S. Almahmoud, Basem O. Elgendy, Azzam I. Aljutayli, Meshal A. Alhrabi, Khattab I. Alyahya
Study The Application Of Different Building Technology Systems Case Study: A Residential Villa In Al-Qassim Region, Ksa, Ahmed Abdelmonteleb M. Ali, Essam S. Almahmoud, Basem O. Elgendy, Azzam I. Aljutayli, Meshal A. Alhrabi, Khattab I. Alyahya
Mansoura Engineering Journal
Buildings are responsible for 39% of global energy-related carbon emissions; 11% come from materials and construction, and 28% come from operational emissions (the energy required to heat, cool, and power). Embodied carbon will contribute an increasing amount to the emissions from new buildings in the future as carbon emissions from building operations continue to decline. This study examined several construction methods and materials to evaluate alternatives for remodeling a residential villa. A villa in the Al-Qassim Region, Buraidah, served as a case study for this research. The methodology employed provided a meticulous appraisal of the building materials and techniques currently …
Unleashing The Potential: The Impact Of Biophilic Office Design On Enhancing Employee Productivity, Asmaa Elantary
Unleashing The Potential: The Impact Of Biophilic Office Design On Enhancing Employee Productivity, Asmaa Elantary
Mansoura Engineering Journal
The observed landscape influences people in numerous ways, including aesthetic appreciation, health, and well-being. The evidence of health benefits associated with viewing those landscapes has proven exceptional value. A comprehensive review of papers on landscapes and sound effects on health was conducted. According to a growing body of evidence, exposure to visible landscapes positively affects one's health and fitness. The most pressing social and economic challenge now is increasing worker productivity, attracting, and retaining exceptionally talented employees, and improving overall employee performance. This will not happen unless companies provide a safe, comfortable, and stimulating work environment; this will not happen. …
Glaucoma Diagnosis Using Hybrid Neural Encoder Decoder Based Unet Hybrid Inception, Akanksha Bali, Vibhakar Mansotra
Glaucoma Diagnosis Using Hybrid Neural Encoder Decoder Based Unet Hybrid Inception, Akanksha Bali, Vibhakar Mansotra
Mansoura Engineering Journal
The anatomy of the retinal fundus picture, which includes the optic disc, affects how glaucoma characteristics are extracted. One of the main causes of blindness in the globe is glaucoma. Correct glaucoma screening in its early phases is difficult since the condition only becomes apparent when its symptoms are severe. If glaucoma is not treated, the optic nerve head (ONH) will be harmed, resulting in vision loss. Nevertheless, there are currently not enough eye experts accessible, and eye screening is personal, time-consuming and labor-intensive. Therefore, this is a real issue that can be addressed by automatically diagnosing glaucoma using deep …