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Efficacy Of Passive Ventilation With High Exhaust Demands: A Case Study Of Cal Poly Sst, Siddarth Bokka

Construction Management

The Simpson Strong Tie Demonstration Laboratory serves as a multipurpose space allowing students at the College of Architecture and Environmental Design at California Polytechnic State University to build full scale construction projects. The building features a material storage area, a high bay for construction of full-scale projects, and a mezzanine level that houses digital fabrication equipment. However, the building was never designed to house the specific equipment currently installed on the mezzanine and ventilate the exhaust fumes from them. Rather, the building relies on passive natural ventilation that is likely ineffective at properly exhausting hazardous fumes, resulting in complaints from …

The Impact Of Culture On Construction, Vatulele Uluakiotonga Finau

Construction Management

The aim of this comprehensive exploration is to identify elements within Japanese, Islamic/Arabic, and Tongan cultures that can be implemented into construction practices in California, leveraging their unique values to enhance home design and construction. The study reveals that culture plays a pivotal role in shaping the design and construction of homes, reflecting deeply held values, traditions, and societal norms. Through qualitative research, expert interviews, and a detailed literature review, key elements defining each cultural approach to housing are elucidated. From the emphasis on privacy and natural ventilation in Japanese homes to the integration of modesty and hospitality in Islamic/Arabic …

Effects Of The 2022 California Building Energy Efficiency Standards On New Construction In San Luis Obispo County, Christopher Hoefer

Construction Management

California released the first Building Efficiency Standards, or Energy Code, in 1976 and has updated them every three years. These standards aim at limiting the amount of energy use and greenhouse gas emissions by buildings in the state. California claims that these standards have saved consumers billions on utility bills, but there is limited information on the upfront impact the Efficiency Standards have had on new construction. This study sought to evaluate the impact that the 2022 California Building Energy Efficiency Standards had on new construction in San Luis Obispo County. Interviews were conducted with local specialty contractors in order …

The Nebraska Bird Review (March 2024) 92(1), Whole Issue

Nebraska Bird Review

Winter Field Report, December 2023–February 2024, by W. Ross Silcock

Birds and the People They Were Named For

Annual Color Photo Section

2023–2024 Christmas Bird Counts, by Don Paseka

Annual Treasurer’s Report for 2023, by Jan Johnson

Subscription and Organization Information

Toward Prebiotic Chemistry On Titan: Impact Experiments On Organic Haze Particles, Ben K.D. Pearce, Sarah M. Hörst, Christopher J. Cline, Mark J. Cintala, Chao He, Joshua A. Sebree, Shannon M. Mackenzie, R. Terik Daly, Alexandra J. Pontefract, Cara Pesciotta

Faculty Publications

Impacts are critical to producing the aqueous environments necessary to stimulate prebiotic chemistry on Titan’s surface. Furthermore, organic hazes resting on the surface are a likely feedstock of biomolecules. In this work, we conduct impact experiments on laboratory-produced organic haze particles and haze/sand mixtures and analyze these samples for life’s building blocks. Samples of unshocked haze and sand particles are also analyzed to determine the change in biomolecule concentrations and distributions from shocking. Across all samples, we detect seven nucleobases, nine proteinogenic amino acids, and five other biomolecules (e.g., urea) using a blank subtraction procedure to eliminate signals due to …

The Metameric Echinoderm, Richard L. Turner

Ocean Engineering and Marine Sciences Faculty Publications

Animal phyla are distinguished by their body plans, the ways in which their bodies are organized. A distinction is made, for example, among phyla with bodies of many segments (metameric; e.g., annelids, arthropods, and chordates), others with completely unsegmented bodies (americ; e.g., flatworms and mollusks), and a few phyla with bodies of 2 or 3 regions (oligomeric; e.g., echinoderms and hemichordates). The conventional view of echinoderms as oligomeric coelomates adequately considers early development, but it fails to recognize the metameric body plan that develops in the juvenile rudiment and progresses during indeterminate adult growth. As in the 3 phyla traditionally …

A Novel And Enhanced Calibration Of The Tilting Weir As A Flow Measurement Structure, Joseph E. Pugh, S. Karan Venayagamoorthy, Timothy K. Gates, Céline Berni, Marie Rastello

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

A large collection of laboratory measurements of piezometric head (h) and discharge (Q) were made over hydraulic models of a tilting weir at nine different angles, ranging from 25.7° to 90° within a 0.3-m-wide flume. These measurements were corroborated with additional laboratory data taken within a 1-m-wide flume across four inclination angles. The range of both inclination angle (θ) and flow scale examined in this study elucidate the nature of the head-discharge rating equation beyond previous work. Results show that as θ decreases under a constant Q, the h over the weir decreases in a monotonic fashion due to the …

Methodology To Design Eco-Friendly Fiber-Reinforced Concrete For 3d Printing, Haodao Li, Alfred Addai-Nimoh, Eric Kreiger, Kamal H. Khayat

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Greater use of locally available supplementary cementitious materials (SCM) to reduce cement content and addition of fiber reinforcement can enhance the performance of 3D printing (3DP) technology in construction. In this study, three classes of eco-friendly 3D printable fiber-reinforced mixtures were targeted, namely ultra-high-performance concrete (UHPC), high-performance concrete (HPC), and conventional concrete (CC). A step-by-step methodology was proposed to maximize the substitution rate of cement with SCM and limestone filler and optimize fiber volume for the successful development of 3D printable fiber-reinforced materials. Binder combinations were initially investigated on the paste level to determine the packing density and robustness. Selected …

Circular Economy Policies For Decarbonization Of Us Commercial Building Stocks: Data Integration And System Dynamics Coflow Modeling Approach, Radwa Eissa, Islam H. El-Adaway

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Despite the recognition of the built environment as a sector with high potential for reducing embodied emissions, there is a lack of national-level data on embodied carbon emissions attributed to the US commercial building stocks. Hence, there is a need to benchmark the current state of embodied emissions attributed to the commercial built environment and the impact of circular economy (CE) policies for their decarbonization to facilitate well-informed decision-making. This paper fills this knowledge gap through providing policy makers with a framework that estimates the current and future projections of embodied carbon emissions attributable to the US commercial building stocks …

Natural Gas Induced Vegetation Stress Identification And Discrimination From Hyperspectral Imaging For Pipeline Leakage Detection, Pengfei Ma, Ying Zhuo, Genda Chen, Joel G. Burken

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Remote Sensing Detection of Natural Gas Leaks Remains Challenging When using Ground Vegetation Stress to Detect Underground Pipeline Leaks. Other Natural Stressors May Co-Present and Complicate Gas Leak Detection. This Study Explores the Feasibility of Identifying and Distinguishing Gas-Induced Stress from Other Natural Stresses by Analyzing the Hyperspectral Reflectance of Vegetation. the Effectiveness of This Discrimination is Assessed Across Three Distinct Spectral Ranges (VNIR, SWIR, and Full Spectra). Greenhouse Experiments Subjected Three Plant Species to Controlled Environmental Stressors, Including Gas Leakage, Salinity Impact, Heavy-Metal Contamination, and Drought Exposure. Spectral Curves Obtained from the Experiments Underwent Preprocessing Techniques Such as Standard …

Dynamic Model Of Ac-Ac Dual Active Bridge Converter Using The Extended Generalized Average Modeling Framework, Kartikeya Jayadurga Prasad Veeramraju, Jonathan W. Kimball

Electrical and Computer Engineering Faculty Research & Creative Works

The ac-ac dual active bridge (DAB) converter is an advanced bidirectional two-port grid interface converter that facilitates active and reactive power flow control between two grids without a dc-link capacitor. This article presents a novel modeling approach for the ac-ac DAB converter using the extended generalized average modeling (EGAM) technique. Unlike the conventional generalized average modeling (GAM) framework, the ac-ac DAB converter's dynamic state variables, including the leakage inductor current and ac grid side LC filters, exhibit grid and switching frequency components, making the standard GAM framework unsuitable for dynamic modeling involving two distinct excitation frequencies. Furthermore, the 2-D GAM …

An Impedance-Source-Based Soft-Switched High Step-Up Dc-Dc Converter With An Active Clamp, Saeed Habibi, Ramin Rahimi, Mehdi Ferdowsi, Pourya Shamsi

Electrical and Computer Engineering Faculty Research & Creative Works

This article proposes a high step-up dc-dc converter based on a trans-inverse impedance-source structure, in which the voltage gain of the converter is increased by using a lower number of turns ratio of the coupled inductors (CI) windings. The proposed converter achieves a very high voltage gain and a very low voltage stress on the switches. An active clamp is incorporated into the topology of the proposed converter, helping to absorb the energy of the leakage inductances of the CI, and to recycle that energy to the output of the converter to further increase the voltage gain. Furthermore, the active …

Pl 43 Traffic Forecasting Report 2023, Mei Chen, Xu Zhang, Eugene Antwi

Kentucky Transportation Center Research Report

This document is the seventh edition of the Traffic Forecasting Report (TFR) for the state of Kentucky. TFR data are important for multiple engineering applications that involve analyzing temporal and spatial variability in traffic distributions and volumes. Most of the metrics discussed in the report were computed using data from 2019, 2021, and 2022 — excluded from consideration were 2020 data because they exhibited anomalous traffic patterns tied to shutdowns associated with the COVID-19 pandemic. Data summarized in this report include average daily traffic, annual average daily truck traffic, travel activity by vehicle type, weekday and weekend hourly volume percentages, …

Multilayered Energy Management Framework For Extreme Fast Charging Stations Considering Demand Charges, Battery Degradation, And Forecast Uncertainties, Waqas Ur Rehman, Jonathan W. Kimball, Rui Bo

Electrical and Computer Engineering Faculty Research & Creative Works

To achieve a cost-effective and expeditious charging experience for extreme fast charging station (XFCS) owners and electric vehicle (EV) users, the optimal operation of XFCS is crucial. It is, however, challenging to simultaneously manage the profit from energy arbitrage, the cost of demand charges, and the degradation of a battery energy storage system (BESS) under uncertainties. This article, therefore, proposes a multilayered Mult timescale energy flow management framework for an XFCS by considering long- and short-term forecast uncertainties, monthly demand charges reduction, and BESS life degradation. in the proposed approach, an upper scheduling layer (USL) ensures the overall operation economy …

Modeling And Understanding Dispute Causation In The Us Public-Private Partnership Projects, Mohamad Abdul Nabi, Rayan H. Assaad, Islam H. El-Adaway

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The partnership between the public and private sectors has led to a new and innovative way of delivering infrastructure projects that is referred to as public-private partnership (PPP). There are various benefits associated with PPP delivery methods including risk sharing, access to private funding, innovation, and flexibility, among others. Despite the proved benefits, contract conflicts and disputes are very common in PPP projects. While previous research studies examined the risks and the potential causes of conflicts in PPP projects, little-to-no research efforts were directed to study and model the interconnectivities between the different causes of conflicts in PPP agreements. To …

Comprehensive Numerical Modeling Of Prestressed Girder Bridges Under Low-Velocity Impact, Mohamed T. Elshazli, Mohanad M. Abdulazeez, Mohamed Elgawady, Ahmed Ibrahim

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Accidental Collisions Involving Over-Height Trucks That Exceed Vertical Clearance Limits And Bridge Superstructures Frequently Happen, Resulting In Compromised Girders And Potential Threats To Structural Safety And Performance. The Numerical Simulation Of Large-Scale Prestressed Girder Bridge Collisions Poses Challenges Due To The Associated Nonlinearities, As Well As The Limited Availability Of Large-Scale Experimental Testing Data In The Literature Due To Cost And Complexity Constraints. This Study Introduces A Numerical Modeling Approach To Efficiently Capture The Response Of Prestressed Girder Bridges Under Lateral Impact Loads. A Finite Element (FE) Model Was Developed Using LS-DYNA And Meticulously Validated Against Experimental Data From The …

Sabin Center For Climate Change Law Annual Report 2023, Sabin Center For Climate Change Law

Sabin Center for Climate Change Law

This year the Sabin Center for Climate Change introduces its first annual report, which highlights and synthesizes our cutting-edge research and innovative engagements in 2023.

Common But Differentiated Constitutionalisms: Does ‘Environmental Constitutionalism’ Offer Realistic Policy Options For Improving Un Environmental Law And Governance? Us And Latin American Perspectives, Erin Daly, Maria Antonia Tigre, Natalia Urzola

Sabin Center for Climate Change Law

Environmental law and governance have taken many different forms in the Americas in response to climate change mitigation. This contribution describes recent developments in the United States, Colombia, and Brazil, illustrating the divergent approaches to climate protection. The chapter highlights the common but differentiated ways in which the three countries in the Americas approach environment constitutionalism in the midst of the climate crisis. On one hand, Brazil and Colombia adopt a rights-based approach to tackle complex issues related to environmental law and governance in their context-specific responses to climate protection. In particular, the courts of Colombia and Brazil have been …

In This Issuereview Articleoriginal Articlescase Series

Saudi Medical Journal

No abstract provided.

Role Of Sfgsi, Microbial Culture And Qsofa As Predictive Factors In Determining The Survival Rate In Fournier Gangrene Patient, Syah M. Warli, Karimul A. Pakpahan, Ramlan Nasution, Dhirajaya D. Kadar, Kharisma P. Adhyatma

Saudi Medical Journal

Objectives: To examine the simplified Fournier Gangrene Severe Index Score (SFGSI) and the number of species in culture findings for predicting death in Fournier Gangrene (FG) patients in terms of their predictive power. Methods: From January 2017 to July 2022, the medical records of individuals undergoing emergency surgery for FG were obtained. A total of 80 patients were examined for clinical data such as age, gender, laboratory parameters, etiology, isolated bacteria, and mortality rate. Results: We identified a statistically significant mean difference between SFGSI ( p <0.0001) and quickSOFA (qSOFA) scores ( p =0.002) in determining the survival rate of FG patients. The sensitivity and specificity of the SFGSI score in predicting mortality were 90.1% and 88.3% respectively, whereas the sensitivity and specificity of the qSOFA score were 88.2% and 86.2%. E. Coli comprised 56.2% of the bacteria, followed by S. Haemolyticus , S. Aureus , P. Aeruginosa , and K. Pneumoniae . On the basis of bacterial culture results, P. Aeruginosa had the highest fatality rate (100%) followed by S. Aureus (75%), S. Haemolyticus (30%), and E. Coli (20%), in that order. Conclusion: The survival rate of FG patients can be predicted using the sensitivity and specificity of the SFGSI and qSOFA scores together. P. Aeruginosa- infected patients have the greatest mortality rate (100%) compared to the other groups.

Immunomodulatory Effects Of Baff And April Cytokines In Post-Pulmonary Infection Lung Cancer: Implications For Drug Resistance And Progression, Wael Alturaiki

Saudi Medical Journal

Lung cancer is a complicated and challenging disease and is one of the most common causes of cancer-related mortality worldwide. Within the lung microenvironment, specific cytokines, including the B cell activation factor (BAFF) and the A proliferation-inducing ligand (APRIL), are produce by various cells, notably airway epithelial cells, in response allergic inflammation or pulmonary infection. These cytokines play a critical role in maintaining local immune responses and fostering the survival of immune cells. The BAFF and APRIL system have been connected in a range of malignancies and have shown their potential in inducing drug resistance and promoting cancer progression. This …

Determining The Predictors Associated With The Difficulty Of Adaptation To Ageing Of Hospitalized Older Adults. Difficulty Of Older Adult To Aging, Canan D. Barutcu, Hale T. Damar

Saudi Medical Journal

Objectives: To determine the predictors associated with the difficulty of adaptation to ageing of hospitalized older adults. Methods: This descriptive cross-sectional study was carried out in a university hospital between October 2019 and March 2020. The sample consisted of 247 older adults. Research data were collected using a Visual Analogue Scale (VAS), the Falls Efficacy Scale (FES) International, Hospital Anxiety and Depression Scale, and Assessment Scale of Adaptation Difficulty for the Elderly (ASADE). Results: The average age of the patients was 73.90 ± 7.38 years, 22.3% of the patients had a fall history in the last year, and 74.5% had …

Does Watching Tv Or Videos During The Day Affect Nighttime Urination?

Saudi Medical Journal

No abstract provided.

Global Cancer Burden Growing, Amidst Mounting Need For Services

Saudi Medical Journal

No abstract provided.

Papillary Thyroid Microcarcinoma With And Without Nodal Metastasis: A Comparative Analysis, Saleh Alqaryan, Hisham Almousa, Raed Almutairi, Ahmed Altuwaijri, Aseel Doubi, Zuhour Alqahtani, Mohammad Almayouf, Majed Albarrak, Mohammed Alessa, Saleh Aldhahri, Khalid Alqahtani

Saudi Medical Journal

Objectives: To assess the demographics and clinical factors of papillary thyroid microcarcinoma (PTMC) patients in Saudi Arabia and compared and analyzed the differences between the patients with and without lymph node metastasis (LNM). Papillary thyroid microcarcinoma (PTMC) is a common thyroid cancer and is not usually detectable clinically but found incidentally after pathologic evaluation of thyroid tissue following surgery for benign thyroid disorders. However, these tumors have a significant risk of LNM. Methods: All PTMC patients who underwent surgery at King Abdulaziz University Hospital, King Fahad Medical City, and King Abdulaziz Medical City from 2012 to 2022 were included. The …

Comparison Of The Popliteal Artery And The Capsule Of The Posterior Knee (Ipack) Block And The Genicular Nerve Block In Primary Total Knee Arthroplasty: A Prospective Randomized Trial, Abdulrahim Dündar, Deniz İpek, Mehmet Yalvaç, Şehmuz Kaya

Saudi Medical Journal

Objectives: To compare the efficacy of genicular block and interspace between the popliteal artery and the posterior capsule (IPACK) block in the reduction of postoperative pain, the need for rescue analgesics, and the effects on a range of motion (ROM) in patients with TKA. Methods: This prospective randomized controlled study was carried out between February and May 2023. Based on the block method, 60 participants were divided into three equal groups. These groups included the IPACK block group (n=20), the genicular block group (n=20), and control group (n=20). Western Ontario and McMaster Universities Arthritis Index (WOMAC), Knee Society score (KSS) …

Who Awards Countries For Progress In Eliminating Industrially Produced Trans Fats For First Time

Saudi Medical Journal

No abstract provided.

The False Hope Of Stewardship In The Context Of Controlling Shareholders: Making Sense Out Of The Global Transplant Of A Legal Misfit, Dan W. Puchniak

Research Collection Yong Pung How School Of Law

In 2010, the United Kingdom issued the world’s first stewardship code. Since then, stewardship codes have been issued in many of the world’s leading economies and now exist in 20 jurisdictions on six continents, with more jurisdictions considering adopting them. In the UK, stewardship codes were promised to transform rationally passive institutional investors into actively engaged shareholders to prevent another Global Financial Crisis. More recently, the new 2020 UK Code has been promoted as a mechanism to save the planet by incentivizing institutional investors to pressure listed companies to focus on ESG. There is a vigorous debate and developed literature …

Multiple Proceedings And Abuse Of Procedure On Bri Disputes, Mariam Gotsiridze

Research Collection Yong Pung How School Of Law

This article argues that specific mechanisms and best practices should be adopted by different players in the Belt and Road Initiative (BRI) dispute resolution ecosystem to mitigate the risks of multiple proceedings and abuse of procedure. Specifically, (i) states should enhance their multilateral and bilateral treaty practices; (ii) arbitral institutions should enhance their arbitral rules as well as cooperate with each other; and (iii) states should direct more efforts to dispute prevention and amicable dispute settlement. This article will explain what these best practices and mechanisms are.

Not Such Massively Discretionary Trusts: Proper Purposes Doctrine And Protectors As Means Of Control, Man Yip, Hang Wu Tang

Research Collection Yong Pung How School Of Law

Innovation in drafting trust deeds has been central to international trust practice resulting in the discretionary trusts being the norm in modern wealth management. In a seminal article, Lionel Smith observes that these trust drafting practices have ‘led to an increase in the dispositive discretions held by trustees’. His analysis deprecates this development where the ‘trustees’ dispositive discretions effectively govern the whole trust structure’—which he labels ‘massively discretionary trusts’. Smith goes on to detail the various legal risks entailed in massively discretionary trusts which generally arise from the fact that the explicitly identified residuary or default beneficiaries are usually not …