Soil Liquefaction Remediation of the Port of San Diego's B Street Pier Facility Using Deep Soil Mixing

The Port of San Diego's B Street Pier facility (Pier) is the busiest cruise terminal in the City of San Diego with over a hundred ship calls annually (pre-COVID). The Pier is an approximately 9.4-acre bulkhead faced mole extending about 1,000 ft into San Diego Bay and approximately 400 ft wide. On the three offshore sides of the bulkheaded mole are marginal pile supported wharfs constructed in 1923. The upland side of the mole is a concrete gravity seawall constructed in 1900. The mole soils consist of hydraulically placed dredge spoils and are susceptible to liquefaction.The existing Pier containment walls are deemed inadequate for seismic loading, mainly due to the presence of liquefiable materials both in front of and behind the existing containment wall. A solution consisting of an improved Deep Soil Mixing (DSM) zone coupled with the installation of a new steel sheet bulkhead was selected to retrofit and upgrade the Pier to current seismic standards. A key aspect of the design was to minimize loading induced from the wharf onto the existing curtain wall during an earthquake. The DSM zone is intended to serve a triple purpose, that is to improve shear strength of the soils behind the curtain wall, to mitigate the impact of liquefaction, and to provide sufficient bearing for potential future lightly loaded structures which may be constructed on the Pier. To obtain a cost-effective design and limit the DSM zone extents, the design also needed to limit the seismic load contributions to the DSM from the marginal wharves during seismic conditions. A development plan consisting of a multi-phased construction plan was determined to meet the Port's capital improvement needs and budget. Phase I development will install the DSM zone and steel sheet pile bulkhead along the south and west face of the mole. Future work will include wharf pile and deck replacement along with completing curtain wall replacement along the north face of the mole. This paper presents the geotechnical design challenges and considerations associated with the design of the DSM and sheet pile system comprising Phase I of the development plan. Key aspects of the geotechnical design included the selection of appropriate liquefaction resistance of the DSM improved zone, designing for the lateral spread of the slope in front of the curtain wall, assessment of stability and deformation of the proposed sheet pile, and the determination of the seismic earth pressures. © ASCE.

IAQ in CCU units: an experimental and numerical investigation based on the outlet air height (case study: Namazi Hospital, Shiraz)

Indoor air quality (IAQ) is a significant concern that affects our health. Recent studies show how poor IAQ amplifies the effects of airborne viruses, which endanger the health of the population relative to the COVID-19. This study aims to find the relationship among IAQ, the location of the air outlet valve and the behavior of the IAQ indicators in the cardiac care unit (CCU) at Namazi Hospital, Shiraz, Iran. In this context, the condition of the air outlet valve can play an important part in preparing a better IAQ. To test the hypothesis, articles based on IAQ guidelines have been studied. Also, certain emissions (CO2, CO, PM2.5 and PM10) have been measured, and the relationship between IAQ, the location of the air outlet valve and the behavior of these emissions in the patient's room at Namazi Hospital. This room has been analyzed using computational fluid dynamics for the prediction of the specification of incoming air flow particles. Also, a Eulerian–Lagrangian model was used. In constant, the turbulence model (realizable k–ԑ) and discrete particle model were employed. The results show that when the outlet valve is placed on the wall at 20 cm, it decreased particle deposition in the room, and as a result, IAQ will be improved and at the same time, the chances of transmitting infectious diseases will be reduced. It is also indicated that a higher amount of particle deposition fraction (ca. 0.71) obtains when the outlet valve is located on the top of the wall. © 2023 Informa UK Limited, trading as Taylor & Francis Group.

Critical care outreach during the COVID-19 pandemic: An observational study.

BACKGROUND: Since the beginning of the coronavirus disease 2019 (COVID-19) outbreak, the Critical Care Outreach Team (CCOT) remained operational to provide critical care support to acutely ill and deteriorating patients on the wards. We aimed to evaluate the demand and efficacy of the critical care outreach service during the COVID-19 pandemic. METHOD: We prospectively evaluated all patients referred to critical care outreach enrolled during a twelve-month period. We reported the cumulative number of activities and interventions and baseline characteristics, acuity level and patients' clinical outcome. The rate of ICU admissions, activity plan, patients' acuity and mortality are compared to historical data pre-pandemic. RESULTS: Amongst 4849 patients referred, 3913 had a clinical review and of those 895 were COVID-19 positive. Non-invasive ventilation was mostly delivered to COVID-19 patients (COVID-19 +VE: 853/895, 95% vs. COVID-19 -VE: 119/3018, 4%) alongside awake prone positioning (COVID-19 +VE: 232/895, 26% vs. COVID-19 -VE: 0/3018, 0%). Compared to pre-pandemic, the cumulative number of patients assessed increased (observed: 3913 vs. historical: 3615; p = 0.204), patients meeting Level 2 acuity were higher (observed: 51% vs. historical: 21%; p = 0.003), but ICU admission rate did not increase significantly (observed: 12% vs. historical: 9%; p = 0.065), and greater mortality rate (observed: 14% vs. historical: 8%; p = 0.046) was observed. CONCLUSION: Critical care outreach bridges the gap between the intensive care unit and general wards and supports the concept of 'critical care without walls' acting as a valuable resource in optimizing and triaging acutely unwell patients and potentially averting critical care admissions. RELEVANCE TO CLINICAL PRACTICE: The COVID-19 pandemic has generated an unprecedented surge of deteriorating and critically ill patients with has caused severe and sustained pressures on intensive care units (ICUs) and general wards. Acutely ill patients can deteriorate quickly, and early recognition is vital to commence critical intervention on the wards or transfer timely to ICU. The Critical Care Outreach Team can help staff and optimize acutely ill and deteriorating patients by providing timely critical care interventions at the patient bedside.

Lipid coating technology: A potential solution to address the problem of sticky containers and vanishing drugs

Pharmaceutical drugs and vaccines require the use of material containers for protection, storage, and transportation. Glass and plastic materials are widely used for packaging, and a longstanding challenge in the field is the nonspecific adsorption of pharmaceutical drugs to container walls – the so-called "sticky containers, vanishing drugs” problem – that effectively reduces the active drug concentration and can cause drug denaturation. This challenge has been frequently discussed in the case of the anticancer drug, paclitaxel, and the ongoing coronavirus disease 2019 (COVID-19) pandemic has brought renewed attention to this material science challenge in light of the need to scale up COVID-19 vaccine production and to secure sufficient quantities of packaging containers. To reduce nonspecific adsorption on inner container walls, various strategies based on siliconization and thin polymer films have been explored, while it would be advantageous to develop mass-manufacturable, natural material solutions, especially ones involving pharmaceutical grade excipients. Inspired by how lipid nanoparticles have revolutionized the vaccine field, in this perspective, we discuss the prospects for developing lipid bilayer coatings to prevent nonspecific adsorption of pharmaceutical drugs and vaccines and how recent advances in lipid bilayer coating fabrication technologies are poised to accelerate progress in the field. We critically discuss recent examples of how lipid bilayer coatings can prevent nonspecific sticking of proteins and vaccines to relevant material surfaces and examine future translational prospects. © 2021 The Authors. VIEW published by Shanghai Fuji Technology Consulting Co., Ltd, authorized by Professional Community of Experimental Medicine, National Association of Health Industry and Enterprise Management (PCEM) and John Wiley & Sons Australia, Ltd.

Horticultural activities with lasting impact on urban communities, in the context of COVID 19 lockdown

Horticultural activities in urban areas and suburbs describe economically viable ways of production (North and Patterson, 2018), and are a continuous growing segment of production in developing countries as well as in Romania countries and are expected to have positive impacts on nutrition quality first and implicit on people's health. This comes as a necessity as the population is continuously growing as the land has a limited use. In a wide sense, urban horticulture includes everything from small home and community gardens to city park management, rooftop greening, as well as complex vertical way of production. This sector assures increased availability of fresh products (vegetables and fruits) in big cities, healthier diets, improved food safety, low transportation costs, efficient resource use, and the mitigation of environmental impacts of horticultural production such as the emission of greenhouse gases.

Just noticeable difference of loudness through building wall of masonry and drywall

In this study, the just noticeable difference (JND) of loudness with respect to sound transmission through walls corresponding to a weighted noise reduction index R-w of 43 dB is investigated. Two types of walls typically used in Argentina are evaluated. One is masonry composed of solid autoclaved aerated concrete bricks with a thickness of 25 cm, and the other is a drywall composed of two 12.5 mm plasterboards with a 25 cm air chamber in between them, filled with glass wool. The JND is determined using the method of constant stimuli for both ascending and descending variations. The source signals used are two types of vacuum-cleaner sounds and two music signals. Online tests are conducted owing to restrictions imposed by the COVID-19, and the presentation level of the stimuli is adjusted based on the sensation level of each individual. Responses from 148 different listeners show no significant difference in the subjective responses among the source signals. Regarding the masonry, the JND values are 3.02 and 1.62 cm for the ascending and descending variations, respectively (corresponding R-w difference of 2 and 1 dB), whereas they are 4.55 and 1.26 cm for the drywall, respectively (1 dB for both).

The Sound of a Circular City: Towards a Circularity-Driven Quietness.

The circular economy paradigm can be beneficial for urban sustainability by eliminating waste and pollution, by circulating products and materials and by regenerating nature. Furthermore, under an urban circular development scheme, environmental noise can be designed out. The current noise control policies and actions, undertaken at a source-medium-receiver level, present a linearity with minimum sustainability co-benefits. A circular approach in noise control strategies and in soundscape design could offer numerous ecologically related co-benefits. The global literature documenting the advantages of the implementation of circular economy in cities has highlighted noise mitigation as a given benefit. Research involving circular economy actions such as urban green infrastructure, green walls, sustainable mobility systems and electro-mobility has acknowledged reduced noise levels as a major circularity outcome. In this research paper, we highlight the necessity of a circularity and bioeconomy approach in noise control. To this end, a preliminary experimental noise modeling study was conducted to showcase the acoustic benefits of green walls and electric vehicles in a medium-sized urban area of a Mediterranean island. The results indicate a noise level reduction at 4 dB(A) when simulating the introduction of urban circular development actions.

A Sequence of Laboratories for Beginning Statics Classes

Laboratories are valuable to students because they provide experiential learning, integrating theory with practice, inquiry learning, active learning, teamwork, planning experiments, communication, ethics (don't fudge data), and data analysis. However, commonly, statics classes don't have laboratories, and students often learn only theory. Even if institutions offer laboratories, such laboratories may use complicated devices such as computerized force sensors or strain gauges that limit the breadth of the laboratories. Such laboratories may also employ expensive or large equipment such as structure walls or Pasco bridge sets. This paper will describe a set of inexpensive, space-saving laboratories in statics courses using string, popsicle sticks, spring scales, 3D printed adapters, squares, protractors, and other venerable, effective items. The laboratories reveal good conformance with theory. Some laboratories deviate significantly from simplistic modeling in beginning statics courses, such as the assumption that pins don't support moments. When assumptions are invalid, and students discover this, the students gain greater insight into statics principles. In the case of trusses, frames, and machines, students learn that the loads calculated using a simple model exceed reality in the diagonal supports and are less than reality in the horizontal and vertical supports. The fall 2021 semester was the first semester that deployed these laboratories, so results are limited. However, the observation is that students gain increased insight into statics. Due to confounding factors and a small sample size, it's difficult to determine if there is a positive or negative influence on the success rates of the post-COVID hybrid classes compared to pre-COVID face-to-face classes. Generic student evaluations showed a marked improvement, likely indicating that students enjoyed the new structure, including labs. Also, students had to write free form lab reports and their communication skills improved markedly as the semester progressed. © American Society for Engineering Education, 2022.

Post-pandemic architecture: a critical review of the expected feasibility of skyscraper-integrated vertical farming (SIVF)

Can skyscrapers survive after COVID-19? Can the idea of integrating vertical farming (VF) into vertical architecture support the environmental, economic, and social issues in the post-pandemic era? Answering these questions is the main objective of this study. Therefore, it explores a) the impact of the pandemic on the built environment, especially skyscrapers;b) the challenges facing the survival of skyscrapers;c) the design parameters and main components of VF;and d) the expected feasibility of integrating VF into vertical architecture to reduce the effects of the pandemic. The research concludes that the skyscraper-integrated vertical farming (SIVF) paradigm can create a closed ecosystem that preserves the environment by a) supporting food security, b) improving indoor environmental quality, c) enhancing psychological and physical health, d) saving energy, e) reducing greenhouse gas emissions and releasing oxygen, and f) supporting the local economy. Consequently, the SIVF paradigm can inaugurate an innovative approach that provides insights into new research trends and discoveries. However, further constraints in the adoption of SIVF should be addressed, and collaborations between researchers and multidisciplinary experts must be created to achieve suitable solutions.

Optimum Trombe wall thickness in the Mediterranean Tunisian context: An energetic and economic study

Trombe walls figure among many passive devices used in the Mediterranean climate to minimize heating demands in residential buildings. The thickness of this massive wall is a critical parameter that influences the effectiveness of the system. Insufficient wall thickness conducts to an important interior temperature fluctuation, and huge wall thickness will increase costs and thermal resistance. In this paper, the optimum thickness of four different construction materials (concrete, stone, adobe, and brick), which can be used in the Trombe wall, was determined using an energetic and economic analysis. The energetic results with TRNSYS software show that the best materials, which can contribute to a reduction by 50% in heating loads of a single room, are stone and concrete. For the economic analysis, the life cycle cost and the payback period were calculated for each construction material. The results show that the optimum thickness for stone and concrete are, respectively, 34 and 32 cm with a payback period of 2.85 and 2.65 years.

Enhancing Mall Security Based on Augmented Reality in the Post-pandemic World

COVID-19 has shocked the retail industry, customers’ concerns for their health and safety are taking business away from shopping malls. Mall owners are thinking of finding new ways to bring their business back in this post-pandemic world. How to protect customers from COVID-19 in shopping malls has been a problem. This study presents an enhanced mall security system to help enforce wearing masks and proper social distancing in shopping malls using augmented reality (AR). We created a novel visualization way: Radar vision to display detected people in the perspective of mall guards, to help guards react quickly to violations, and better enforce the mandatory rules. When the mall guards wearing hololens activate the radar vision function, they can see all people violating wearing masks or social distance mandates through the wall. Mall guards can use gaze to select the target person and then use the voice command to activate the navigation arrow to help them quickly go to the scene. In addition to helping mall guards to enforce mandates, the system also provides assisted functions to protect customers. When the violation situation appears around a customer, the system will alert them to avoid and show an avoidance arrow until the user goes in the correct direction. We demonstrated a preliminary system with four surveillance cameras in our school building area. The pilot study shows that our system can effectively detect and display radar images, increasing the efficiency of mall guards and reducing customer safety concerns. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

Mechatronics Design and Kinematic Simulation of UTP-ISR01 Robot with 6-DOF Anthropomorphic Configuration for Flexible Wall Painting

In the year 2020, countries were in a race against the spread of Covid-19, leading to major deficiencies in the areas of health, economy, and construction. For this reason, the robotics industry emerged as a viable and safe option to perform important and critical tasks in different sectors, one of them is the real estate. For this reason, a robotic arm was designed to wall painting, this study is supported by the mechatronics engineering department of the Universidad Tecnológica del Perú. The designed robot called: 'UTP-ISR01' has 6 axes and a linear displacement of 2.8 m with turns of 0.24 sec/60°. For the calculation of the forward kinematics the Denavit Hartenberg method was used, then the homogeneous transformation matrices were used to calculate the rotation and translation movements of the robotic manipulator. With the equations identified in the inverse kinematics, the positions and orientations of the robot were plotted, as well as the dimensions of the working area. The CAD design was carried out with engineering software, such as Autodesk Inventor for the mechanical design and assembly of the parts. In addition, with RoboDK software, kinematic simulations and analysis were performed. In conclusion, the robotic arm will reduce the delivery times of the apartments built by the real estate companies. © 2022 IEEE.

Optimal Balance between Heating, Cooling and Environmental Impacts: A Method for Appropriate Assessment of Building Envelope’s U-Value

In Europe, the recent application of regulations oriented to zero-energy buildings and climate neutrality in 2050 has led to a reduction in energy consumption for heating and cooling in the construction sector. The thermal insulation of the building envelope plays a key role in this process and the requirements about the maximum allowable thermal transmittance are defined by country-specific guidelines. Typically, high insulation values provide low energy consumption for heating;however, they may also entail a risk of overheating in summer period and thus negatively affect the overall performance of the building. In addition, the embodied energy and related emissions caused by the manufacturing and transportation processes of thermal insulation cannot be further neglected in the evaluation of the best optimal solution. Therefore, this paper aims to evaluate the influence in terms of embodied and operational energy of various walls’ thermal insulation thicknesses on residential buildings in Europe. To this end, the EnergyPlus engine was used for the energy simulation within the Ladybug and Honeybee tools, by parametrically conducting multiple iterations;53 variations of external wall U-value, considering high- and low-thermal-mass scenarios, were simulated for 100 representative cities of the European context, using a typical multifamily building as a reference. The results demonstrate that massive walls generally perform better than lightweight structures and the best solution in terms of energy varies according to each climate. Accordingly, the wall’s thermal transmittance for the samples of Oslo, Bordeaux, Rome and Almeria representative of the Continental, oceanic temperate, Mediterranean, and hot, semi-arid climates were, respectively: 0.12, 0.26, 0.42, and 0.64 W/m2K. The optimal solutions are graphically reported on the map of Europe according to specific climatic features, providing a guidance for new constructions and building retrofit.

Structural analysis and optimal retrofitting solutions for historical monument with masonry walls

”Braila Emergency County Hospital (ECH)” historical monument represents one of the main objectives of structural rehabilitation in both Braila county and Braila city. Thus, a structural strength verification for Pavilion B, Section 2, using ETABS software was performed, in order to find optimal retrofitting (rehabilitation) solutions. This analytical procedure proved to be beneficial and absolutely necessary, due to observations regarding the spatial contribution of masonry shear walls and finally the proper establishment of capable/design efforts. Following the structural calculation, it was concluded that the best solution would be to use composite materials for retrofitting a certain number of masonry shear walls, as classical retrofitting methods proved to be more expensive and structurally inefficient. Furthermore, in the context of the COVID-19 pandemic, the solution to use composite materials is beneficial, as it would entail no personnel or patients to be evacuated during the rehabilitation works, i.e. the hospital being able to continue to operate.

Duckweeds as Promising Food Feedstocks Globally

Duckweeds are the smallest flowering plants on Earth. They grow fast on water’s surface and produce large amounts of biomass. Further, duckweeds display high adaptability, and species are found around the globe growing under different environmental conditions. In this work, we report the composition of 21 ecotypes of fourteen species of duckweeds belonging to the two subfamilies of the group (Lemnoideae and Wolffioideae). It is reported the presence of starch and the composition of soluble sugars, cell walls, amino acids, phenolics, and tannins. These data were combined with literature data recovered from 85 publications to produce a compiled analysis that affords the examination of duckweeds as possible food sources for human consumption. We compare duckweeds compositions with some of the most common food sources and conclude that duckweed, which is already in use as food in Asia, can be an interesting food source anywhere in the world.

Leveraging elasticity of blood stenosis to detect the role of a non-Newtonian flow midst an arterial tube: Mazumdar and Keller models

Blood stenosis is considered one of the most serious risks which face humanity nowadays. In addition, it is also one of the most apparent symptoms of COVID (19) (Corona Virus). Consequently, this research is shedding light on studying the blood flow in case of having blood clots and artery elasticity in the presence of stenosis during studying the flow. Hematopoiesis requires a model of the yield stress fluid, and among the available yield stress fluid models for blood flow, the Herschel-Bulkley model is preferred (because Bingham, Power-law and Newtonian models are its special cases). Navier stokes equation is used to simulate this subject in a mathematical way. The elasticity on the stenosis arterial walls is simulated by Rubinow & Keller model [24] and Mazumdar model [25]. The results reveal exciting behaviors that, in turn, require adequate study of non-Newtonian fluid flow phenomena, especially the results showed that the increase in the parameters related to the elasticity of the walls facilitating the flow of blood through the stenosis area. In addition, a comparison between two elasticity models (Rubinow & Keller model and Mazumdar model) is considered. Further, for normal artery without stenosis, our results are the same as those obtained by Vajravelu et.al [22].

Sneezing Aerosol Transport in an Indoor Farmers’ Market

The transportation and surface deposition of aerosols from sneezing in a small indoor farmers’ market are studied numerically. The effects of numbers and locations of the entrances and exits of the market are discussed under the condition of natural convection. The results indicate that aerosols leave the indoor environment more quickly when two doors are designed face to face on the walls perpendicular to the natural wind direction compared to other natural ventilation strategies. The concentrations of aerosols accumulated on the surfaces of the stalls and human bodies inside the market are also lower. In this case, the risk of contacting the virus is relatively low among susceptible individuals in the indoor farmers’ markets. Moreover, opening more doors on the walls parallel to the natural wind direction is not beneficial for the fast exhaust of aerosols.

Countermeasures against COVID-19 from the viewpoints of dental diseases: strengthening innate immunity with the toothpick method of brushing. (Special Issue: COVID-19 and historical pandemics part 2.)

Coronavirus disease (COVID-19) patients with periodontal disease have an 8.8-fold higher mortality rate than those in the patients without periodontal diseases. This was higher than the odds ratio for patients with diabetes. Periodontal disease is associated with ulcers in the periodontal pocket, and gram-negative bacteria called periodontal pathogens invade the tissue through ulcers. Bacteria in the ulcer site are phagocytosed and sterilized by leukocytes. Following the autolysis of leukocytes, lipopolysaccharides (LPS) on the bacterial cell wall spread throughout the body, which is a major cause of multiple organ failure. Thus, periodontal disease is considered to contribute to the mortality rate of COVID-19. Ulcers in the periodontal pocket can be repaired using by a new developed brushing method called the toothpick method. The toothpick method can significantly improve gingival bleeding in one week, which is quicker than conventional periodontal treatment methods. Mechanical stimulation by the toothbrush causes gingival basal cells, fibroblasts, vascular endothelial cells and osteoblasts to proliferate and repair the tissue. However, these cell proliferations cease to occur 0.5 mm away from where the toothbrush bristles make contact with the gingiva. The toothpick method of brushing is characterized by its ability to stimulate the interdental gingiva, which is the initial site of periodontitis. As the toothpick method can repair periodontal ulcers, it will strengthen biological defense mechanisms against chronic degenerative and infectious diseases.

Teachers’ opinion about collaborative virtual walls and massive open online course during the COVID-19 pandemic

During the COVID-19 pandemic, Mexican universities incorporated technological tools to update the activities of the courses under the distance modality. This quantitative research analyzes the teachers' perception about Collaborative Virtual Walls (CVWs) and Massive Open Online Courses (MOOCs) through data science. The participants are 54 professors from the National Autonomous University of Mexico who completed the International Diploma “Innovation in University Teaching 2021”. The results of machine learning indicate that CVWs and MOOCs positively influence the learning and participation of the students. Likewise, the decision tree technique identifies 4 predictive models about these technological tools. This study recommends the incorporation of ICTs in the educational field because teachers can organize and carry out creative activities under the distance modality. Even universities can include in their strategic planning the incorporation of CVWs and MOOCs in the educational process. The limitations of this research are the sample and analysis about the perception of the teachers in a Mexican university. Therefore, future research can analyze CVWs and MOOCs considering the development of skills and satisfaction of the students in the middle schools, high schools and universities. In conclusion, teachers rely on technological advances such as CVWs and MOOCs to create new school activities under the distance modality and improve the teaching-learning conditions during the COVID-19 pandemic. © 2022 by authors;licensee OJCMT.

Drystone walls in the Algarve, Portugal. Characterization and interconnection with the geology and lithology

Drystone walls can be frequently observed along the Algarve, south region of Portugal, performing both support and property division. This region is also known by its geological diversity and, consequently, lithology, which are intimately related to the orography. The combination of all these factors allowed the proliferation of this traditional drystone walls during the last centuries, and they represent not only an important element of the landscape, but also a perspective of the social, economic and technical bases of Algarve’s heritage. This article intends to present this diversity and the relationship between its various facets. In order to achieve the objectives, several field surveys were carried out to different geological zones, with the intention of gathering information related to the natural material used and its construction technique, as well as interaction with local inhabitants. These visits were supported by bibliographic and “Web-graphic” research, to substantiate the hypotheses. Based on the data results it is possible to identify a close interconnection between the geology and wall structure typology, since they are made with the natural rock fragments (raw material) found nearby. However, its function is more related to the orogeny and lithology, the latter defining also the type of agricultural culture. The study is enriched by the enormous diversity of rock types, although the Algarve is a relatively small region. The main limitations found during the development of the study are related to the physical access to the walls and the interviews with the locals. These constrictions were due to the lack of land maintenance, allowing vegetation to growth naturally, invading and covering the walls, and also due to the pandemic situation brought by the COVID-19 virus, which interdict the interaction between persons and also the travels. Despite the restrictions mentioned, the fieldtrips gave enough data to support the correlation between the geology, lithology and the raw material used on the drystone walls, as well as their relation to the terraces that proliferate in specific areas of Algarve. In view of the scarcity of bibliographic elements associated with this subject, in the studied territory, the elaboration of documents that allow the identification, characterization, geo-location and dissemination of the object of study, is considered as an asset for this theme. Finally, the study aims to alert and counter the tendency to abandon this type of heritage, valuing it and making it known.