Type Of Construction Research Articles

Advancing Circular Buildings: A Review of Building Strategies for AEC Stakeholders

The uptake of a circular economy (CE) in the building sector is challenging, primarily due to the complexity associated with the design process and the dynamic interaction among architects, engineers, and construction (AEC) stakeholders. The standard and typical design process and construction methods raise concerns about building life cycles. Buildings should not only fulfill current needs, but one also needs to consider how they will function in the future and throughout their lifetime. To address these complexities, early planning is required to guide designers in holistically applying systems thinking to deliver CE outcomes. This paper outlines a critical review of CE implementation in buildings, with a proposed trifecta of approaches that significantly contribute to the development of circular buildings (CBs). The findings outline a proposed visualized framework with a conceptual formula that integrates CE design strategies to simplify and enhance AEC stakeholders’ perception of the circularity sequence in buildings. By strategically integrating loop-based strategies with the value retention process (VRP) and design for X (DFX) strategies, along with efficient assessment tools and technologies, it becomes feasible to embrace a CE during the design phase. The outcome of this review informs AEC stakeholders to systematically and strategically integrate the critical dimensions of a CE throughout the building life cycle, striking a balance between environmental concern, economic value, and future needs.

Idiosyncratic entrenchment: tracing change in constructional schematicity with nested random effects

Abstract Usage-based constructionist approaches see language as an inventory of constructions at different levels of schematicity learned from the input. If so, personal constructicons should vary as a function of usage. Repeated use and chunking/entrenchment of concrete instances should lead to reanalysis of their internal structure and change in the level of schematicity. This paper exploits the reduction probability of is in it is as a diagnostic of reanalysis in a 1.75-million-word diachronic corpus of a single blogger over 8 years. All instances of it is/it’s (n = 10,929) were annotated at the constructional and lexical levels. A multilevel logistic regression model showed significant fixed effects of constructional entropy and construction-to-word association on reduction probability. Importantly, there remained substantial variation across lexical types of constructions in the extent to which they associated or became associated with reduction over time, suggesting idiosyncratic entrenchment and potential reanalysis as a function of usage.

Solution of the modular PCM-based cooling ceiling and ventilation system

Most newly constructed buildings are now built to energy-passive standards, which set requirements for specific heating demand, non-renewable primary energy use, building envelope airtightness, and the frequency of exceeding permissible indoor air temperatures in summer. These temperature exceedances relate to the room’s thermal stability, determined by the potential for heat accumulation in surrounding structures over the daily cycle. For buildings with lightweight construction, implementing a Thermal Energy Storage (TES) solution can significantly enhance their energy accumulation ability. This article addresses the design and evaluation of a progressive cooling ceiling system combined with active ventilation system components, including the incorporation of TES based on PCM materials. The proposed solution aims to improve the thermal stability of occupied spaces, thereby significantly reduce the need for mechanical cooling. The research developed a new methodology for measuring the energy performance parameters of modular cooling ceiling systems, with its implementation thoroughly discussed. The evaluation of this solution was conducted within the context of the entire energy system for a reference building, considering various construction types (lightweight, medium, heavy). The overall potential energy savings range from 13% to 32%, depending on the building’s construction, while still meeting the required thermal comfort criteria.

Method for vibration suppression in rotary machines using multiple automatic ball balancers

An automatic ball balancer (ABB) is a device that is used to automatically balance an eccentric rotor; these are typically used in rotary machines with unknown or variable imbalances. The typical construction of an ABB consists of several balls in a ring race. The balls can move freely inside the race, which changes the eccentricity radius and phase angles relative to the rotor. The automatic balancing process requires an ABB unit to be installed on an eccentric rotor's axis; thus, its application is quite limited and usually requires the redesign of a rotary machine. This paper presents a new method for eliminating vibrations in rotary machines by using multiple ABBs that are mounted away from the rotor's axis. In this application, ABBs can be considered to be unbalanced rotary masses with adjustable eccentricity radii and phases. Theoretically, this ability allows for the total reduction of the inertial force from an eccentric rotor; however, the parameters of the ABBs must be set correctly. The process of setting the eccentricity radius and phase in each ABB occurs due to a self-synchronization phenomenon and generally depends on the physical parameters of either a rotary machine or ABBs. Both analytical and numerical investigations that were based on the mathematical model of a system of a rotary machine with a pair of ABBs allowed us to formulate basic rules to apply such a system in existing rotary machines without interference on the rotors.

Multi-objective optimization of rural residential envelopes in cold regions of China based on performance and economic efficiency

Building envelope renovation solutions are critical to building performance and post-renovation economics. Building renovation is easier to carry out if the impacts of building envelope renovation solutions on building performance and post-renovation economic efficiency can be foreseen and a more sustainable and efficient renovation design can be achieved. This paper explores the optimal design of building envelope renovation using genetic optimization algorithms and statistical analysis methods, taking the performance of the renovated building and the economic efficiency of the renovation solution as the starting points. In Qingdao, a cold region of China, a survey was carried out on typical rural areas in seven regions. The selected design variables include the external wall and roof insulation material type(TWall, TRoof), external wall and roof insulation thickness(δWall, δRoof), type of window construction(TWc), and area radio of the window to the wall(WWR). Minimization of total building energy consumption(E) and renovation cost(COSTRE) and after renovation maximization of the combined incremental cost-benefit ratio over a 20-year life cycle(CICBR20-year life-cycle), effective natural daylighting illuminance(UDI), and percentage of time spent in indoor comfort(PTC) were considered in the optimization of the envelope. The results show that in cold regions, different envelope renovation solutions affect the optimization objectives to different degrees; changing the south-facing window-to-wall ratio(S_WWR) has a bigger effect on E, PTC, and UDI; and choosing different TRoof has a bigger effect on COSTRE and CICBR20-year life-cycle. Renovation of the selected typical rural residence with the optimal solution results in an energy-saving rate(Re) of 53.08 %, an increase of 940.86 h/year in annual indoor comfort hours(HIC) and 377.00 h/year in annual effective natural lighting hours(HUDI).

Experimental investigations on the cyclic load-bearing behavior of structural glazing joints under seismic load

AbstractIn addition to static loads, structural glazing joints in glass and facade construction in many regions are subject to extraordinary effects such as earthquakes. Seismic actions are characterized by a randomly recurring and dynamic load that affects the structural behavior of the viscoelastic material. Publications on the load-bearing behavior and design of structural glazing joints against seismic loading have not systematically considered these effects. In this paper, relevant parameters influencing the seismic loading of structural glazing joints are determined, evaluated, and narrowed down to areas of practical relevance as part of a theoretical stress analysis. On this basis, extensive experimental investigations of the low-cycle fatigue behavior of structural glazing joints are presented. Cyclic stress–strain curves are determined and compared with quasi-static reference tests to describe the basic low-cycle fatigue behavior. The influence of the previously determined parameters on the cyclic load-bearing behavior can thus be determined and presented. These investigations provide an important basis for describing the behavior under typical seismic random loading. In particular, the type of load application caused by the different construction types of glass and facade buildings can be mentioned as a decisive influencing factor in addition to the frequency of building construction. The results provide a first important contribution to the modeling and design of structural glazing joints against earthquake effects. Further extensive scientific investigations will be carried out on this basis in order to develop a design model for structural glazing joints in disaster scenarios.

High prevalence and risk factors associated with asymptomatic malaria among children in Nkwen village, Northwest Region, Cameroon

BackgroundIn endemic locations, asymptomatic malaria is a major contribution to the rise in clinical malaria. In order to achieve the goal of interrupting malaria transmission, control programmes should take into consideration carriers of asymptomatic malaria parasite. Hence, the purpose of this study was to look at the prevalence and risk factors of asymptomatic malaria in children in Nkwen village.MethodsUsing a cross-sectional and community-based design, conducted between June and December 2022, a total of 246 children were enrolled after obtaining informed and signed consent from parents and/ or guardians. To collect data, pre-tested, closed-ended, structured questionnaires were used, ensuring the accuracy and reliability of the information gathered. A digital thermometer with infrared forehead capability was used to take participants’ body temperature, providing precise measurements and respondents with temperature < 37.5 °C, and not presenting any symptoms or indicators of malaria were included in the study, ensuring the focus on asymptomatic cases. Blood samples were collected by venipuncture and screened for the presence of asymptomatic parasitaemia using blood smear microscopy and nested polymerase chain reaction (PCR). Data was entered into Microsoft Excel worksheet and analysed using SPSS version 23 software. Logistic regression models were carried out to explore the risk factors associated with asymptomatic malaria at household and individual levels and statistically significant association was considered at a p-value < 0.05.ResultsA total of 246 healthy children were examined for asymptomatic malaria infection using microscopy and PCR. Of the examined children, 65.9% (162/246) were malaria positive by PCR while 59.3% (146/246) were malaria positive by microscopy. Considering both diagnostic methods, females had a greater prevalence of asymptomatic malaria than males. In logistic analysis, the risk of developing asymptomatic malaria was associated several factors: previous malaria episode (OR = 5.14; CI 2.94–9.01), family history of malaria (OR = 3.86; CI 2.21–6.74), homestead near swampy areas (OR = 3.56; CI 2.10–10.61), non-utilization of insecticide treated nets (OR = 4.36; CI 2.53–7.5), non-usage of indoor residual spray (IRS) (OR = 6.67; CI 3.75–11.86) and opened eaves (OR = 3.86; CI 2.21–6.74). No associations were established between asymptomatic malaria and the following factors: age group (p > 0.05), gender (p > 0.05) and type of wall construction (p > 0.05).ConclusionThe high rate of asymptomatic malaria in this study is a significant problem and may jeopardize the current malaria control effort. Personal and house-level risk factors were linked with asymptomatic malaria. Therefore, it should be considered when evaluating and restructuring more successful malaria elimination tactics to accomplish the intended goals of malaria control.

Selection of track form in railway tunnel from a life cycle analysis perspective

AbstractThe use of greenhouse gas (GHG) emissions as a criterion for decision-making within the rail industry is increasing. The demand for considering this criterion affects the type of decision models acceptable by railway infrastructure managers in the planning, construction, and maintenance of railway assets. The total amount of GHG emitted from a track solution in tunnels during its service life depends on the track form (i.e., ballasted track or ballastless track), the type of construction, maintenance machines used, current traffic profile, and tunnel length. However, the development in the design of ballastless track systems during recent decades to make them environmentally friendly motivates infrastructure managers to rethink and consider the use of the system. This study examines the effect of several design and maintenance factors not adequately addressed in previous research. These factors are (i) the modulus of elasticity of track support affecting the design of track forms, (ii) differences in maintenance and renewal required for track forms in the corresponding line condition, and (iii) recent developments in optimizing the environmental impact of ballastless tracks. The GHG emissions, represented by life cycle carbon dioxide equivalent (CO2e) emissions, are calculated using the climate impact software developed by the Swedish Transport Administration Trafikverket. The result is compared with the estimated emission from the conventional ballasted tracks. The method proposed in this paper is applied in a case study to study the effect of applying the optimized ballastless track system Rheda 2000® in a railway tunnel (the Hallsberg-Stenkumla tunnel) as part of a new line project in Sweden. The model applied in the study is an integral part of an integrated decision support system for effectively selecting track solutions from a lifecycle perspective. The study´s findings are: (i) the life cycle CO2 equivalent emissions by a ballastless track during its life cycle are 10% lower than that of the ballasted track, (ii) the primary total emission driver for both track form solutions is the emissions generated at the manufacturing of rails. (iii) the second important emission factor for the ballasted track solution is the emission from the renewal of the track form during its life cycle, and (iv) the second important emission factor for the ballastless track solution is concrete manufacturing.

Machine learning-based predicting of PCM-integrated building thermal performance: An application under various weather conditions in Morocco

As is now stands, the building sector is among the “big three” significant energy consumer and greenhouse gas contributor in the world. Consequently, there has been a growing movement towards the development and adoption of renewable energy sources, energy efficient measures and energy management strategies. Phase change materials (PCMs) are considered as an alluring option for energy efficiency measures in building. In this paper, a case study building, based on typical residential construction in Morocco, was selected to assess the potential energy savings of adding PCM to the roof for twenty-four cities using the dynamic simulation tool, TRNSYS. Thereafter, thirteen machine learning techniques, including ANN, DT, SVM, ELM, GB, RF, TB, GLRM, GPR, LR, GAM, KRRM and LRR were assessed for predicting the hourly heating, cooling, and total energy consumptions. The models were trained and tested on a dataset that was gathered from the simulations in twenty-four locations in Morocco. The outdoor dry-bulb temperature, the relative humidity, the wind velocity, the wind direction, and the total solar radiation were considered as the key features. The obtained results revealed that using PCM, can effectively lower the total energy demand for all the cities under study, with exception for very cold climate given by Ifrane and Midelt, where the annual total energy consumption shows an increasing trend. Furthermore, comparing the statistical results for each machine learning model, it is found that the SVM model consistently outperforms all models and can be successfully employed to predict the hourly network's outputs of the building.

Optimal classification of radiant time series for cooling load calculation of building air-conditioning systems

Building cooling load is caused by complex thermal effect. Design cooling load determines the capacity of air-conditioning assembly units and systems to maintain stable thermal environment and high operating efficiency. The radiant time series method (RTSM) is applicable for design cooling load calculation in engineering application. The radiant time series (RTS) should precisely match various room types by improving their accuracy and practicality. The room construction types require more explicit identification. This study proposes RTS classification method based on heat balance method (HBM) and CatBoost to obtain the representative RTSs for various room types. A new quantitative indicator, interior surface heat storage coefficient, is introduced to quantify the construction type. An accuracy evaluation is performed on the representative RTSs and design cooling loads calculated using them. The results show that interior wall type, ceiling type and floor type are important parameters for RTS classification. Compared to the HBM, the representative RTSs cause relative deviations of design cooling loads within 5 % for over 90 % of the room samples, with mean deviations within 2 %. This has demonstrated accurate RTS classification in this study. The appropriate representative RTSs with refined construction type can ensure accurate cooling load calculation and facilitate extensive application.

Energy performance tradeoff assessment for varying design parameters in office buildings

ABSTRACT Energy performance and heat release from buildings can differ with variations in envelope and operational parameters. This study presents an evidence-based assessment for different study locations in Japan including Sapporo, Tokyo, and Osaka. The analysis used a comparative approach using a reference energy performance simulation model for large office buildings using EnergyPlus to assess the impact of design variations on building performance. The analysis included 66 simulations with 10 design parameters and 2 construction types. The study coupled energy performance with heat release from the building towards outdoor environments since heat release can influence the local thermal environments. Desirable tradeoffs were observed for timber constructions by increasing the cooling setpoint by 1°C reduced cooling and heating energy use by 10.7% and 11.9% in Sapporo, 8.5% and 22.7% in Tokyo, and 6.8% and 24.4% in Osaka. Similarly, cooling and heating peak loads were reduced by 5.9% and 2.4% in Sapporo, 5.4% and 2.0% in Tokyo, and 6.5% and 5.2% in Osaka. Additionally, nighttime heat release also decreased by 12.4% and 13.6% in Sapporo and Tokyo, and 6.2% and 5.7% in Osaka for concrete and timber constructions. The study provides early-stage design support for energy-efficient buildings and improved local thermal environments.

Usage-based approaches to assessing syntactic sophistication in second language writing: Interaction of genre and proficiency

Based on usage-based approaches to language learning, this study investigated how second language (L2) writers use verbs and argument structure constructions across different genres, while also exploring how this genre effect interacts with L2 writing proficiency. We analyzed five previously established usage-based indices using a learner corpus comprising argumentative and narrative essays elicited from 3196 college-level learners. Through a series of mixed-effects regression analyses, we identified a consistent genre effect, with argumentative essays featuring a more sophisticated use of verbs and constructions alongside a greater diversity in construction types. Additionally, a significant interaction emerged between genre and proficiency regarding construction frequency and the frequency of verb–construction combinations. These results indicate that while the previously observed genre effect extends to the L2 use of verbs and constructions, its manifestation varies depending on L2 proficiency. Overall, our study supports the usage-based learning of verbs and constructions in the context of L2 writing.

A new fire damage index to assess the vulnerability of immovable cultural heritage

The recurrent occurrence of devastating fires in cultural heritage constructions highlights the need for more studies focusing on the assessment of their fire vulnerability to support the development of adequate mitigation measures. To address the limitations of existing methods, this article introduces the Potential Fire Damage Index (PFDI) as a new approach. The PFDI is an indicator-based method that integrates twenty-one Fire Vulnerability Indicators (FVIs) into four categories with varying weights. The method is applicable to various types of heritage constructions and independent of national fire safety codes, which makes it a versatile tool for assessing fire vulnerability and estimating potential damage that can impact the cultural values of these structures. The article emphasizes the significance of the PFDI for preliminary identification of critical points in heritage constructions requiring vulnerability reduction measures, paving the way for subsequent more rigorous fire safety engineering analyses. The detailed criteria for assessing the FVIs are presented, and a case study illustrates the PFDI's applicability. The case study analyses a historic church in Portugal and evaluates its current conditions, as well as the impact of implementing certain measures to reduce fire vulnerability. To evaluate the robustness of the PFDI, its results were also compared with those of a well-established method in the literature.

The Application and Development of Prefabricated Prefabricated Buildings in Housing Construction

Prefabricated building is a type of construction where components are produced in a factory, transported to the construction site, and directly assembled into a building through certain connection methods. Its advantages include: shortening construction period, improving construction efficiency, saving energy, and reducing pollution. Prefabricated prefabricated buildings mainly adopt industrial production technology, achieving high quality and efficiency of building products through standardized design, factory production, and prefabricated construction. Prefabricated prefabricated buildings have many advantages over traditional cast-in-place concrete construction methods. Mainly including: high production efficiency, reduced energy consumption, shortened construction period, green environmental protection, energy conservation and emission reduction, etc. Therefore, prefabricated prefabricated buildings are a trend in the development of the construction industry today and an inevitable choice for achieving sustainable development in the construction industry. At present, prefabricated prefabricated buildings have been widely used in residential engineering.

Femoral Neck Fractures With Associated Ipsilateral Femoral Shaft Fractures in Young Adults

To analyze patients, injury patterns, and treatment of femoral neck fractures (FNFs) in young patients with FNFs associated with shaft fractures (assocFNFs) to improve clinical outcomes. The secondary goal was to compare this injury pattern to that of young patients with isolated FNFs (isolFNFs). Retrospective multicenter cohort series. Twenty-six North American level-1 trauma centers. Skeletally mature patients, <50 years old, treated with operative fixation of an FNF with or without an associated femoral shaft fracture. The main outcome measurement was treatment failure defined as nonunion, malunion, avascular necrosis, or subsequent major revision surgery. Odds ratios for these modes of treatment were also calculated. Eighty assocFNFs and 412 isolFNFs evaluated in this study were different in terms of patients, injury patterns, and treatment strategy. Patients with assocFNFs were younger (33.3 ± 8.6 vs. 37.5 ± 8.7 years old, P < 0.001), greater in mean body mass index [BMI] (29.7 vs. 26.6, P < 0.001), and more frequently displaced (95% vs. 73%, P < 0.001), "vertically oriented" Pauwels type 3, P < 0.001 (84% vs. 43%) than for isolFNFs, with all P values < 0.001. AssocFNFs were more commonly repaired with an open reduction (74% vs. 46%, P < 0.001) and fixed-angle implants (59% vs. 39%) (P < 0.001). Importantly, treatment failures were less common for assocFNFs compared with isolFNFs (20% vs. 49%, P < 0.001) with lower rates of failed fixation/nonunion and malunion (P < 0.001 and P = 0.002, respectively). Odds of treatment failure [odds ratio (OR) = 0.270, 95% confidence interval (CI), 0.15-0.48, P < 0.001], nonunion (OR = 0.240, 95% CI, 0.10-0.57, P < 0.001), and malunion (OR = 0.920, 95% CI, 0.01-0.68, P = 0.002) were also lower for assocFNFs. Excellent or good reduction was achieved in 84.2% of assocFNFs reductions and 77.1% in isolFNFs (P = 0.052). AssocFNFs treated with fixed-angle devices performed very well, with only 13.0% failing treatment compared with 51.9% in isolFNFs treated with fixed-angle constructs (P = <0.001) and 33.3% in assocFNFs treated with multiple cannulated screws (P = 0.034). This study also identified the so-called "shelf sign," a transverse ≥6-mm medial-caudal segment of the neck fracture (forming an acute angle with the vertical fracture line) in 54% of assocFNFs and only 9% of isolFNFs (P < 0.001). AssocFNFs with a shelf sign failed in only 5 of 41 (12%) cases. AssocFNFs in young patients are characterized by different patient factors, injury patterns, and treatments, than for isolFNFs, and have a relatively better prognosis despite the need for confounding treatment for the associated femoral shaft injury. Treatment failures among assocFNFs repaired with a fixed-angle device occurred at a lower rate compared with isolFNFs treated with any construct type and assocFNFs treated with multiple cannulated screws. The radiographic "shelf sign" was found as a positive prognostic sign in more than half of assocFNFs and predicted a high rate of successful treatment. Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

Salgo de casa? Salgo a casa? Salgo la casa? Analysis of the crosslinguistic influence on preposition use in motion verb constructions by multilingual German learners of Spanish

The use of prepositions is one of the most difficult grammar topics for Spanish learners. The high frequency prepositions ‘a’ (‘to, at, on’), ‘de’ (‘from, of’) and ‘en’ (‘in, on, into’) are often confused or omitted, especially in motion verb constructions (e.g., Campillos Llanos, 2014). This can be due to their polysemous character and the low salience. In addition, crosslinguistic influence (Jarvis and Pavlenko, 2008) from the first language as well as additional acquired foreign language(s) play a significant role.In order to analyse the complexity of interlanguage phenomena in the construction [motion verb + a/de/en + noun] to improve acquisition in Spanish classes, it is necessary to study authentic learner data. In this paper, I will discuss the results of an explorative pilot study on crosslinguistic influence carried out at a German grammar school in the federal state Baden-Württemberg in order to find out after which verbs of motion these prepositions are omitted or confused, how often this occurs, and which languages might influence it. The results of two groups of pupils at beginner level with the mean age of 14,03 are compared: The first group (n = 21) learns Spanish as the third foreign language, in addition to English and French, while the second group (n = 16) learns Spanish as the second foreign language after English. Both groups learn the named foreign languages in an instructed setting at school.The pilot study reveals that the prepositions ‘a’ and ‘de’ are much more often confused or omitted in the construction types [llegar/volver/venir + a + noun] (‘arrive/come back/come + to/in + noun’) and [salir/ir + de + noun] (‘leave/go + noun’) compared to [ir + a + noun] (‘go to + noun’). A possible explanation is positive and negative intra- and interlingual transfer of equivalent constructions from different languages. These results form a hypothesis basis that a systematic application of Pedagogical Construction Grammar (Boas, 2022; De Knop and Gilquin, 2016) and multilingual didactics (Fäcke and Meiβner, 2019; García et al., 2020) in Spanish classes to teach these polysemous prepositions could probably be helpful to avoid errors.

Treatment Failure After Repair of Displaced Femoral Neck Fractures in Patients Compared by "Decade of Life": An Analysis of 565 Cases in Adults Less Than 60 years of Age.

To study the results of displaced femoral neck fractures (FNFs) in adults less than 60 years of age by comparing patients, injury, treatment, and the characteristics of treatment failure specifically according to patients' age at injury, that is, by their "decade of life" [ie, "under 30" (29 years and younger), "the 30s" (30-39 years), "the 40s" (40-49 years), and "the 50s" (50-59 years)]. Multicenter retrospective comparative cohort series. Twenty-six North American Level 1 Trauma Centers. Skeletally mature patients aged 18-59 years with operative repair of displaced FNFs. Main outcome measures were treatment failures (fixation failure and/or nonunion, osteonecrosis, malunion, and the need for subsequent major reconstructive surgery (arthroplasty or proximal femoral osteotomy). These were compared across decades of adult life through middle age (<30 years, 30-39 years, 40-49 years, and 50-59 years). Overall, treatment failure was observed in 264 of 565 (47%) of all hips. The mean age was 42.2 years, 35.8% of patients were women, and the mean Pauwels angle was 53.8 degrees. Complications and the need for major secondary surgeries increased with each increasing decade of life assessed: 36% of failure occurred in patients <30 years of age, 40% in their 30s, 48% in their 40s, and 57% in their 50s (P < 0.001). Rates of osteonecrosis increased with decades of life (under 30s and 30s vs. 40s vs. 50s developed osteonecrosis in 10%, 10%, 20%, and 27% of hips, P < 0.001), while fixation failure and/or nonunion only increased by decade of life to a level of trend (P = 0.06). Reparative methods varied widely between decade-long age groups, including reduction type (open vs. closed, P < 0.001), reduction quality (P = 0.030), and construct type (cannulated screws vs. fixed angle devices, P = 0.024), while some variables evaluated did not change with age group. Displaced FNFs in young and middle-aged adults are a challenging clinical problem with a high rate of treatment failure. Major complications and the need for complex reconstructive surgery increased greatly by decade of life with the patients in their sixth decade experiencing osteonecrosis at the highest rate seen among patients in the decades studied. Interestingly, treatments provided to patients in their 50s were notably different than those provided to younger patient groups. Prognostic Level III. See Instructions for Authors for a complete description of levels of evidence.

ANALISA PEMBEBANAN DAN DAYA DUKUNG TANAH DENGAN PONDASI TIANG PANCANG BERDASARKAN DATA N-SPT PADA PEMBANGUNAN GEDUNG IAIN PADANGSIDEMPUAN

Foundations are a type of construction that forms the basis of a building in direct contact with the ground and functions as a support for the building above it, aiming to transfer vertical and horizontal loads gradually and evenly to the soil layers. The IAIN Padangsidempuan North Sumatra Building project will begin construction from January 6 2022 to October 30, 2022. This building is intended for lecture halls with a capacity of 5 floors. Using a pile foundation with a depth of 18 meters with a diameter of 0.5 meters. From the calculation results, it is found that the carrying capacity of 1 pile for PC4D50 = 154.92 tons and the bearing capacity of the foundation in the group is Qg PC4D50 = 406,509 tons and PC3D50 = 154.92 tons, and in 1 group PC3D50 = 349,963 tons, which is different from the initial plan for 1 pole. for PC4D50 it is = 157.84 tons and for 1 group = 414.17 tons and for PC3D50 for 1 pole = 157.84 tons and for 1 group = 356,561 tons. For PC4D50 the results are as follows: For Direction D19 – 150, for PC3D50 obtained as follows: For Direction Initial planning Y direction D19 – 150.

Minimum levels of interpretability for artificial moral agents

AbstractAs artificial intelligence (AI) models continue to scale up, they are becoming more capable and integrated into various forms of decision-making systems. For models involved in moral decision-making (MDM), also known as artificial moral agents (AMA), interpretability provides a way to trust and understand the agent’s internal reasoning mechanisms for effective use and error correction. In this paper, we bridge the technical approaches to interpretability with construction of AMAs to establish minimal safety requirements for deployed AMAs. We begin by providing an overview of AI interpretability in the context of MDM, thereby framing different levels of interpretability (or transparency) in relation to the different ways of constructing AMAs. Introducing the concept of the Minimum Level of Interpretability (MLI) and drawing on examples from the field, we explore two overarching questions: whether a lack of model transparency prevents trust and whether model transparency helps us sufficiently understand AMAs. Finally, we conclude by recommending specific MLIs for various types of agent constructions, aiming to facilitate their safe deployment in real-world scenarios.

Examining the Land Use and Land Cover Impacts of Highway Capacity Expansions in California Using Remote Sensing Technology

Highway capacity expansion has wide impacts on land use and land cover (LULC). Cost–benefit analyses and environmental review processes for roadway capacity expansion and maintenance decisions do not comprehensively consider the LULC impacts. This study examined land cover changes directly associated with highway expansion in California, and the relationship between land use and the vegetation impacts of highway projects using satellite remote sensing data. The methodology involves a geospatial analysis of normalized difference vegetation index (NDVI) data in 18 sites across California before and after highway expansion project completion. We accounted for seasonality and included a set of control sites. Findings indicate that the impacts of highway expansion on changes in NDVI are diverse, stressing the importance of the environmental context around each individual project site. Sites that are located near less-developed areas with more extensive natural vegetation (e.g., sprawled areas or exurbs), show a significant decline in NDVI values. Virtually all sites with insignificant changes in NDVI after highway expansion are located in areas that already exhibit heavy urban development (e.g., Los Angeles, San José) or are otherwise located near large expanses of bare, non-vegetated earth. Also, project sites that experienced multiple types of construction (i.e., adding more lanes, widening sections, bridge renovation, etc.) were more likely to exhibit decreasing NDVI values compared with project sites that only experienced one type of construction. Decisions about highway construction and capacity expansion should consider the context and the full environmental impacts, including land use and land cover changes over time.