Search Results (237)

Background/Objectives: The aim of this study was to evaluate the possible effects of shock wave (SW) application for the noninvasive treatment of impacted ureteral stones on the pericalcular ureteral tissue in terms of changes in ureteral wall thickness. Methods: A total of 114 patients with impacted proximal ureteral stones underwent ESWL at our department. Patient- and stone-related parameters (size, density, and location); radiological parameters, including ureteral wall thickness (UWT); and degree of hydronephrosis were assessed on NCCT images before and shortly after the procedure. The possible effects of applying high-energy shock waves to the pericalcular ureteral tissue were evaluated according to changes in ureteral wall thickness. A comparative evaluation was conducted based on the number of sessions and the outcomes of SWL. Results: The mean value of UWT after the first session of stone management decreased significantly when compared to the mean pre-operative value (p < 0.005). This was also noted after the second treatment session, after which the mean UWT was significantly lower than the pre-operative value (p < 0.005). However, the difference in the mean UWT before and after three sessions of SWL was not significant (p = 0.104). A detailed evaluation of these values in all groups revealed that although the decrease in the mean UWT in cases with a successful outcome was significant (p < 0.005), the change in these values was not significant in cases for which the treatment was unsuccessful (partial disintegration of the stone or no disintegration at all) (p = 0.145). Conclusions: Application of SW in patients with impacted upper ureteral stones may not have a detrimental effect on the ureteral wall or compromise a secondary procedure if the stones are successfully disintegrated and passed after one or two sessions. However, in the case of resistant stones, an increased number of sessions and more SWs may induce such adverse effects, warranting further evaluation in future studies. Full article

Records of Sarcocystis spp. diversity in rodents are relatively extensive; however, the increasing application of molecular approaches indicates that our current knowledge of these parasites remains incomplete. In the present study, morphological, genetic and phylogenetic data are provided on Sarcocystis arvalis n. sp. from the common vole (Microtus arvalis). Using light microscopy, the observed sarcocysts had a relatively thin (<1 μm) and smooth cyst wall. Via transmission electron microscopy, the sarcocyst wall thickness ranged from 0.7 to 1 μm, and the parasitophorous vacuolar membrane exhibited small knob-like blebs and was slightly wavy, type 1a. Based on 18S rRNA, 28S rRNA, cox1 and rpoB loci, S. arvalis n. sp. showed the highest similarity with Sarcocystis myodes from the bank vole (Clethronomys glareolus). According to the phylogenetic placement, S. arvalis n. sp. is the most closely related to Sarcocystis spp. with a rodent–mammal lifecycle. Morphologically, S. arvalis n. sp. forms sarcocysts that share a lot of similarities with those of S. myodes, Sarcocystis ratti and Sarcocystis cernae and molecular analysis is necessary for accurate species identification. Based on the abundance of the hosts and the proportion of voles in their diet, the most likely definitive hosts of S. arvalis n. sp. are red foxes, stone martens, least weasels, and domestic cats. Full article

Soil erosion is a growing environmental issue around the world, including in Malta. This study focused on estimating soil loss in the San Blas and Binġemma valleys on the island of Gozo, the second largest in the Maltese archipelago. To do this, we used the RUSLE model combined with GIS tools, supported by fieldwork and lab testing of soil properties like texture and organic matter to ensure accurate, ground-based data. A key part of the research was also to understand how much the C-factor in RUSLE, which relates to crop cover, affects erosion in the area. We compared present-day erosion patterns with those from 1957 by analyzing old aerial photos and reconstructing land use back then. The findings show that in 1957, soil erosion was more widespread but generally milder, with most areas losing less than 2.0 t ha⁻¹ yr⁻¹. In contrast, in 2021, erosion tends to be more intense but limited to specific areas, especially along the valley floor, where losses reached up to 13.0 t ha⁻¹ yr⁻¹ compared to 5.5 t ha⁻¹ yr⁻¹ in 1957. The results also suggest that fields under cultivation are more prone to erosion compared to areas that have been abandoned. Based on these trends, this study recommends maintaining traditional erosion control methods like terraces and dry stone-walls, and encouraging farmers to adopt practices such as crop rotation, conservation tillage, contour planting, and strip cropping. It also suggests carrying out similar assessments in other valleys to guide valley-specific actions. Full article

The terraced fields of Samaba in Honghe County are one of the key protected sites within the globally important agricultural heritage systems. This study focuses on the traditional courtyard dwellings of the Hani people in this area, proposing that their architectural practices reflect a profound and sustainable adaptation to the local environment and socio-agricultural systems. Through field investigations, architectural surveys, and in-depth interviews with Hani Bema (ritual specialists), artisans, and residents, this research analyzes the settlement characteristics and distribution of the area, the spatial features of traditional Hani courtyard dwellings, three typical floor plans, and the construction techniques of key components such as wooden structures, earthen walls, and roofs. The findings indicate that the use of local materials (e.g., wood, raw earth, stone) and their specific construction methods are inherently responsive to the regional climate, forming a sustainable residential model that spans material acquisition, construction, and maintenance. Crucially, the study reveals a strong isomorphic relationship between the material and energy cycles involved in Hani settlement construction and those of terrace farming activities. We argue that the sustainability of villages and architecture is essential for the sustainability of the entire terrace agricultural ecosystem. By elucidating the wisdom of Hani dwellings in terms of materials, construction, and maintenance, this study provides significant insights for discussions on sustainable vernacular architecture and offers valuable perspectives for its green renewal and contemporary adaptation. Full article

In terms of ensuring the sustainability of vernacular building culture, the evaluation of buildings should consider not only visual and cultural values but also energy efficiency, environmental impact, and indoor thermal comfort. This study comparatively examines the performance of stone and adobe wall materials, widely used in Anatolia, under different climatic conditions. In the simulations conducted using DesignBuilder software, building geometry and indoor use scenarios were kept constant, while only exterior wall material and climate data were treated as variables. Annual data for the year 2023 were analyzed. The findings indicate that adobe-walled structures stand out in hot and transitional climates with lower heating and cooling energy demands, reduced electricity consumption, lower carbon emissions, and better thermal comfort conditions. In Kars, representing a cold continental climate, both materials remained outside comfort thresholds; however, adobe structures performed better in terms of energy use, environmental impact, and thermal comfort. This comprehensive evaluation highlights the potential of climate-responsive use of local materials and offers valuable contributions to design strategies focused on sustainability and cultural heritage. The results present not only context-specific insights for Anatolia but also universally applicable, generalizable recommendations for other regions with similar climatic conditions and vernacular building cultures. Full article

In this study, the energy performance of traditional, modern, and insulated wall assemblies in a heritage residential building in Al Salt city, Jordan, is evaluated using the simulation software DesignBuilder version 7.0.2.004. The case study compares the thermal behavior of traditional thick limestone walls, modern reinforced concrete and block-based walls, and contemporary insulated systems under local climatic conditions. The results show that traditional stone walls exhibit limited energy efficiency and require insulation to meet contemporary standards. However, they perform better than modern concrete walls based on their thermal mass. While concrete walls with inadequate insulation exhibit the poorest performance and are associated with significantly higher energy demand and CO₂ emissions, insulated wall systems that combine stone with insulation layers demonstrate the best thermal performance and achieve substantial reductions in energy use and environmental impact. These findings emphasize the feasibility of upgrading heritage buildings through the integration of modern insulated wall assemblies, which can lead to considerable energy savings and a lowered carbon footprint while simultaneously keeping the architectural identity and cultural value. Full article

Internal insulation plasters enable historic building renovation without altering the external appearance of the wall. However, the use of internal insulation must be verified case-by-case through dynamic hygrothermal simulation, and the influence of input parameters on the results is not always clear. This paper aims to (i) characterize a new lime-based insulating plaster with expanded recycled glass and aerogel through laboratory measurements, (ii) assess the damage criteria of the plaster under different boundary conditions through dynamic simulations, and (iii) identify the most impactful design conditions on the relative humidity behind insulation. This innovative plaster combines highly insulating properties (thermal conductivity of 0.0463 W/mK) with good capillary activity while also integrating recycled components without compromising performance. The relative humidity behind insulation remains below 95% in most simulated scenarios, with cases above this threshold found only in cold climates, particularly under high internal moisture loads. The parametric study shows that (i) in the analyzed stones, the thermal conductivity variation of the existing wall has a greater effect on the relative humidity behind insulation than the variation of the vapor resistance factor, (ii) the effect of insulation thickness on the relative humidity behind insulation depends on the difference in thermal resistance of the insulation and existing masonry layers, and (iii) internal moisture load and external climate directly impact the relative humidity behind insulation. Full article

Stone cultural heritage structures built from pyroclastic rocks are susceptible to deterioration due to their sensitivity to atmospheric processes. Detecting such deterioration and periodically examining it using non-destructive testing (NDT) techniques is one of the most critical measures for ensuring its transmission to future generations. In recent years, assessing the properties of building stones through NDT methods has been widely applied in planning the preservation of stone cultural heritages. In this study, deterioration observed on the interior walls of the Emir Ali Tomb, a structure distinguished from other tombs in the region by its exceptional architecture, was investigated through laboratory tests and NDT techniques, including deep moisture measurement, P-wave velocity, and infrared thermography. It was determined that the monument was constructed from four different types of pyroclastic rock, classified according to their textural and geomechanical characteristics. Using data obtained from in situ tests, NDT distribution maps were generated. The deep moisture, P-wave velocity, and infrared thermography maps revealed that the primary cause of deterioration in the monument was related to capillary water rise. Full article

Acute pancreatitis (AP) is the most common cause of gastrointestinal-related hospitalizations in the United States, with gallstone disease and alcohol as the leading etiologies. Management is determined by disease severity, classified as interstitial edematous pancreatitis or necrotizing pancreatitis, with severity further stratified based on local complications and systemic organ dysfunction. Regardless of etiology, initial treatment involves aggressive intravenous fluid resuscitation with Lactated Ringer’s solution, pain and nausea control, early oral feeding in 24 to 48 h, and etiology-directed interventions when indicated. In gallstone pancreatitis, early endoscopic retrograde cholangiopancreatography (ERCP) with sphincterotomy is indicated in the presence of concomitant cholangitis or persistent biliary obstruction, with subsequent laparoscopic cholecystectomy as standard of care for stone clearance. The role of interventional therapy in uncomplicated AP is limited in the acute phase, except for biliary decompression or enteral feeding support with nasojejunal tube placement. However, in severe AP with complications, interventional radiology (IR) and endoscopic approaches play a pivotal role. IR facilitates early percutaneous drainage of symptomatic, acute fluid collections and infected necrosis, particularly in non-endoscopically accessible retroperitoneal or dependent collections, improving outcomes with a step-up approach. IR-guided angiographic embolization is the preferred modality for hemorrhagic complications, including pseudoaneurysms. In the delayed phase, walled-off necrosis (WON) and pancreatic pseudocysts are managed with endoscopic ultrasound (EUS)-guided drainage, with direct endoscopic necrosectomy (DEN) reserved for infected necrosis. Dual-modality drainage (DMD), combining percutaneous and endoscopic drainage, is increasingly utilized in extensive or complex collections, reflecting a collaborative effort between gastroenterology and interventional radiology comparable to that which exists between IR and surgery in institutions that perform video assisted retroperitoneal debridement (VARD). Peripancreatic fluid collections may fistulize into adjacent structures, including the stomach, small intestine, or colon, requiring transpapillary stenting with or without additional closure of the gut leak with over-the-scope clips (OTSC) or suturing devices. Additionally, endoscopic management of pancreatic duct disruptions with transpapillary or transmural stenting plays a key role in cases of disconnected pancreatic duct syndrome (DPDS). Comparative outcomes across interventional techniques—including retroperitoneal, laparoscopic, open surgery, and endoscopic drainage—highlight a shift toward minimally invasive approaches, with decreased morbidity and reduced hospital stay. The integration of endoscopic and interventional radiology-guided techniques has transformed the management of AP complications and multidisciplinary collaboration is essential for optimal patient outcomes. Full article

This study investigated the effect of the internal design and layer thickness on 3D-printed dental models. The internal designs were classified based on the presence or absence of the palatal surface (Opened or Closed palate) and the outer wall thickness (1 mm, 3 mm, and Full). They were named as follows: O1, O3, OF, C1, C3, and CF. Based on the internal design and layer thickness (50 and 100 µm), a total of 12 experimental groups were created (n = 120). The control group was fabricated using dental stone (n = 10). The measurement sites were defined as follows: the mesiodistal width (MD) and occlusocervical height (OC) of the crown and the intercanine width (ICW) and intermolar width (IMW). Statistical significance was tested using a two-way ANOVA, one-way ANOVA, and independent sample t-test (α = 0.05). In comparisons with and without palatal surfaces, O3 and C3 showed a similar accuracy (p > 0.05) in the MD and OC, but C3 showed better (p < 0.05) or similar values (p > 0.05) than O3 in the ICW and IMW. Meanwhile, there was no significant difference between OF and CF in all measurement sites (p > 0.05). In comparisons of the outer wall thickness, CF showed a higher accuracy than C1 at all measurement sites (p < 0.05), whereas no statistical significance was observed between CF and C3 except for the ICW (p > 0.05). OF and CF did not show statistical significance according to the layer thickness at all measurement sites (p > 0.05). In all measurement sites except OC, the experimental group showed a superior (p < 0.05) or similar accuracy than the control group (p > 0.05). Within the limitations of this study, a 3 mm outer wall, including the palatal surface, and a 50 µm layer thickness is recommended as the optimal 3D printing condition for dental model fabrication. Full article

This study provides an in-depth structural analysis of UNESCO World Heritage Apulian trulli, considering the three-layer dry-stone structure of their characteristic conical roofs. An integrated approach involving laser scanning, ground-penetrating radar, endoscopic investigation, and laboratory materials testing is used to identify and characterize the multi-wythe masonry system. A detailed finite element model is created in ANSYS to analyze seismic performance on Italian building codes. The model is validated through ambient vibration testing using accelerometric measurements. The diagnostic survey identified a three-layer system including exterior stone wythe, interior wythe, and rubble core, with compressive strength of stone averaging 2.5 MPa and mortar strength of 0.8 MPa. The seismic assessment will allow the examination of displacement patterns and stress distribution under design load conditions (ag = 0.15 g). The structural analysis demonstrates adequate performance under design loading conditions, with maximum stress levels remaining within acceptable limits for historic masonry construction. The experimental validation confirmed the finite element model predictions, with good correlation between numerical and experimental frequencies. The improvement of the overall seismic performance with the multi-wythe configuration and the role of wall thickness and geometric proportions will be taken into account. The methodology aims to provide technical evidence supporting the continued use of vernacular buildings while contributing to scientifically informed conservation practices throughout the region. Full article

Nowadays, public buildings are clad on the outside, many with stone-clad facades. Energy requirements have changed a lot in the last 20–25 years, and the latest required value of the thermal conductivity of masonry is 0.24 W/m²K. The relevant requirements, available materials, and fastening technology options have changed significantly. Our research covers a comprehensive analysis of these systems, the selection of stone cladding materials, and the suitability and use of individual stone types for facade cladding, as well as an energy examination of layered wall systems and the development of fastening elements, including the material structure of the elements and possible design and fastening methods. In the original university research, we also developed an applied technology for several product manufacturing companies in order to obtain approval for industrial application. In this article, we summarize the results of our research, the building structure and building physics issues, the necessary fastening technology design, and the main aspects of selecting stone tiles regardless of the manufacturing companies. The goal of our university research was the introduction and structural development of assembled stone facade cladding in Hungary, a development that continues to this day. The assembled stone cladding system we developed has been used to cover the facades of thousands of buildings in Hungary. Full article

Aim: The aim of this study was to evaluate the patient-, stone-, and anatomy-related factors that may influence the impaction status of proximal ureteral stones, with a particular focus on the ureteral wall thickness (UWT) as a radiologic surrogate marker of chronic irritation. Materials and Methods: A total of 115 adult patients who underwent ureteroscopic treatment for impacted proximal ureteral stones between January 2021 and December 2023 were retrospectively analyzed. The demographic data, comorbidities, stone characteristics (volume, location, and HU value), and anatomical parameters (hydronephrosis grade, proximal ureteral diameter, and UWT) were evaluated using non-contrast computed tomography (NCCT). The correlations between the UWT and both patient- and stone-related variables were assessed using linear and logistic regression analyses. Results: The mean patient age was 45.3 ± 13.8 years, with a male-to-female ratio of 2.11. A significant positive correlation was observed between the UWT and hydronephrosis grade (p = 0.002), presence of comorbidities such as hypertension or diabetes mellitus (p = 0.005), and stone volume (p = 0.005). A larger stone diameter and length were also significantly associated with increased UWT (p = 0.014 and p = 0.005, respectively). However, no statistically significant correlation was found between the UWT and stone density (p = 0.614) or the duration of stone presence (p = 0.987). Conclusions: Increased ureteral wall thickness appears to be a strong indicator of stone impaction severity and is positively associated with hydronephrosis, comorbid conditions, and stone size. These findings support the potential clinical utility of UWT in preoperative planning and treatment selection for impacted upper ureteral stones. Further prospective studies are warranted to validate these observations and explore their implications for procedural success and complication risk. Full article

Urban planning in arid climates must overcome numerous nonclimatic constraints that often result in outdoor thermal discomfort. This is particularly evident in Béchar, a city in southern Algeria known for its long, intense summers with temperatures frequently exceeding 45 °C. This study investigates the influence of urban morphology on thermal comfort and explores architectural and digital solutions to enhance energy performance in buildings. This research focuses on Béchar’s city center, where various urban configurations were analyzed using a multidisciplinary approach that combines typomorphological and climatic analysis with numerical simulations (ENVI-met 3.0 and TRNSYS 16). The results show that shaded zones near buildings have lower thermal loads (under +20 W/m²), while open areas may reach +100 W/m². The thermal comfort rate varies between 22% and 60%, depending on wall materials and occupancy patterns. High thermal inertia materials, such as stone and compressed stabilized earth blocks (CSEBs), reduce hot discomfort hours to under 1700 h/year but may increase cold discomfort. Combining these materials with targeted insulation improves thermal balance. Key recommendations include compact urban forms, vegetation, shading devices, and high-performance envelopes. Early integration of these strategies can significantly enhance thermal comfort and reduce energy demand in Saharan cities. Full article

Background and Objectives: Ureteral kinking may hinder endoscopic access and reduce the success of ureteroscopic lithotripsy (URSL). This study evaluated whether kinking can be predicted preoperatively using non-contrast computed tomography (CT) by introducing a novel metric—Maximum Horizontal Ureteral Displacement (HUDmax)—and assessed its predictive value for procedural success. Materials and Methods: Data from 1261 patients who underwent URSL for a single ureteral stone were retrospectively analyzed. Patients were categorized into two groups based on whether the stone could be reached using a semirigid ureteroscope. Propensity score matching (1:2) was performed based on stone size and location, resulting in two matched cohorts: Group 1—Semirigid Inaccessible (SRI, n = 72), and Group 2—Semirigid Accessible (SRA, n = 144). Stone characteristics, ureteral wall thickness (UWT), and HUDmax were evaluated. Correlations between HUDmax and surgical parameters were analyzed, and the predictive value of HUDmax was assessed using receiver operating characteristic (ROC) analysis. Results: The SRI group showed significantly higher HUDmax values (median 2.36 mm vs. 1.2 mm, p < 0.0001). Semirigid access failure necessitated conversion to flexible ureteroscopy in all SRI cases, compared to 15% in the SRA group (p < 0.0001). Stone-free rates were significantly lower in the SRI group (45% vs. 82%, p < 0.0001), and the use of a double-J stent or nephrostomy placement was more frequent. Operative times were also longer in the SRI group (55 vs. 42 min, p < 0.0001). HUDmax correlated positively with operative time (r = 0.258, p = 0.005) but not with stone size, density, UWT, or hydronephrosis. ROC analysis showed HUDmax strongly predicted semirigid access failure (AUC: 0.805; cutoff: 1.58 mm), and moderately predicted stone-free status (AUC: 0.697; cutoff: 1.68 mm). Conclusions: Severe ureteral kinking constitutes a significant anatomical obstacle to the success of semirigid URSL. This study is the first to demonstrate that clinically relevant kinking can be predicted preoperatively using a non-contrast imaging modality, via the novel HUDmax parameter. Full article