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Hans, Amneet K., Jason M. Brown, and Emad Qayed. "A Massive Stone Ingestion." ACG Case Reports Journal 8, no. 11 (November 2021): e00707. http://dx.doi.org/10.14309/crj.0000000000000707.
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Alghafees, Mohammad A., Saleha Abdul Rab, Hiba M. Raheel, Belal N. Sabbah, Ahmed E. Maklad, Mazin I. El Sarrag, Ahmed E. Abouelkhair, et al. "Giant staghorn stone causing inferior vena cava compression: a novel case report." Annals of Medicine & Surgery 85, no. 6 (May 3, 2023): 2990–94. http://dx.doi.org/10.1097/ms9.0000000000000680.
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Introduction and Importance: Staghorn calculi (SC) are defined as large kidney stones that fill the renal pelvis and at least one renal calyx. They represent 10–20% of all renal stones in developing countries and require prompt diagnosis and management. Massive SC (over 5 cm) are treated exclusively via open surgery, despite percutaneous nephrolithotomy (PCNL) being the gold standard treatment for large stones. Descriptions of PCNL for massive SC are very limited in the literature. Case Presentation: We report a case of a 63-year-old male who presented with chronic abdominal pain, hepatosplenomegaly, and normal renal function. He was later diagnosed with polycythemia vera. Computed tomography of the abdomen revealed massive, bilateral staghorn stones measuring 7.3×5.5 cm and 1.8×4.5 cm on the right and left, respectively. Additionally, the right stone was found to be compressing the inferior vena cava (IVC). The patient was promptly scheduled for right-sided PCNL and the target of 80% stone fragmentation was successfully attained. Discussion: We present the first case of a stone of such size in the Middle East, as well as the first known case of a renal stone compressing the IVC. Unlike previous reports, the stone was successfully fragmented via PCNL – a procedure that has not been described for stones of such size. Conclusion: This report highlights that ultrasound-guided PNCL without any other intervention is sufficient for the successful treatment of giant SC. Greater research is needed on the potential utility of using ultrasound-guided PCNL for the fragmentation of stones sized over 5 cm.
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Valiquette, Anne Sophie, Diego Barrieras, and Michael McCormack. "Massive stone burden in an ileocecal pouch: A preventable condition?" Canadian Urological Association Journal 8, no. 5-6 (May 21, 2014): 358. http://dx.doi.org/10.5489/cuaj.1537.
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The challenges of transition from the pediatric to the adult setting have been reported. We describe a case of massive stone burden in the ileocecal pouch of a patient lost to follow-up after his transfer from a pediatric to an adult institution. Although we successfully managed the patient and retrieved the pouch stones without any complications, several surgical complications may occur in a patient with a history of extensive abdominal surgeryand bladder exstrophy. This patient’s late complication might have been prevented with a more efficient transfer from a pediatric to an adult institution.
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Cao, Jingqin, Defen Zhang, Yanxiao Yue, Yingchun Zhang, Huaizhuang Cai, Jie Zhang, Zuoxiang Wang, Doree Nwi, and Agnes Williams. "Therapeutic Images of CT Image Analysis Based on 3D Visualization Technology in Patients with Hepatobiliary Stones." Journal of Medical Imaging and Health Informatics 10, no. 9 (August 1, 2020): 2101–5. http://dx.doi.org/10.1166/jmihi.2020.3150.
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Objective: Paper for CT imaging in three-dimensional visualization technology for laparoscopy combined with biliary hard lens therapeutic clinical effect of extrahepatic bile duct stones were evaluated. Methods: Abdominal medical image 3D visualization software for our hospital CT imaging diagnosis and treatment of bile duct stones in 45 patients of bile duct stones three-dimensional visualization of clinical analysis and preoperative planning, and brought it into the operating room three-dimensional visualization model, guiding the implementation of the joint 3D laparoscopic biliary lithotripsy targeted hard lens. At the same time, as well as consistency with the actual hepatolithiasis distribution calculation operative 3D model visualization display; The operative time, bleeding, blood transfusion, stone clearance rate, morbidity and mortality perioperative after review stone recurrence rate was observed. Results: reproducing a three-dimensional patient model visualization liver, intrahepatic vascular anatomy of the liver bile duct stones distributed, real intraoperative and preoperative displayed three-dimensional visualization model consistent, pre-operative manner consistent with preoperative planning. Operation time (125.9±21.2) minutes, blood loss (38.8±8.5) ml, no massive hemorrhage and blood transfusion; MRCP examination by stone clearance rate was 100%; 2 biliary injury, bile leakage 1 complication the rate was 6.7%; There were no perioperative deaths. Stone recurrence two cases, the recurrence rate of 4.4%. Conclusion: The three-dimensional visualization techniques may be implemented hepatolithiasis accurate assessment of preoperative, intraoperative guidance of laparoscopic, endoscopic biliary hard gravel, stone liver resection operation, help to improve stone clearance rate, guarantee operation safety.
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Yu, Xianbin, Xiaoqing Chen, Wanyu Zhao, and Jiangang Chen. "The Influence of an EPS Concrete Buffer Layer Thickness on Debris Dams Impacted by Massive Stones in the Debris Flow." Shock and Vibration 2015 (2015): 1–11. http://dx.doi.org/10.1155/2015/463640.
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The failure of debris dams impacted by the massive stones in a debris flow represents a difficult design problem. Reasonable materials selection and structural design can effectively improve the resistance impact performance of debris dams. Based on the cushioning properties of expanded polystyrene (EPS) concrete, EPS concrete as a buffer layer poured on the surface of a rigid debris dam was proposed. A three-dimensional numerical calculation model of an EPS concrete buffer layer/rigid debris dam was established. The single-factor theory revealed change rules for the thickness of the buffer layer concerning the maximal impact force of the rigid debris dam surface through numerical simulation. Moreover, the impact force-time/history curves under different calculation conditions for the rigid debris dam surface were compared. Simulation results showed that the EPS concrete buffer layer can not only effectively extend the impact time of massive stones affecting the debris dam but also reduce the impact force of the rigid debris dam caused by massive stones in the debris flow. The research results provide theoretical guidance for transferring the energy of the massive stone impact, creating a structural design and optimizing debris dams.
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Butany, Jagdish, Pradeep Vaideeswar, Vidya Dixit, and Christopher Feindel. "Massive mitral annular calcification: A stone in the heart." Canadian Journal of Cardiology 25, no. 1 (January 2009): e18. http://dx.doi.org/10.1016/s0828-282x(09)70026-1.
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Gamal Saad, W., and A. Mmdouh. "Massive vs limited pneumatic stone disintegration in PCNL for stag horn stone: A randomized study." European Urology Supplements 17, no. 2 (March 2018): e1223. http://dx.doi.org/10.1016/s1569-9056(18)31695-6.
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Leung, Derek D. V., and Andrew M. McDonald. "Taking Rocks for Granite: An Integrated Geological, Mineralogical, and Textural Study of Curling Stones Used in International Competition." Canadian Mineralogist 60, no. 1 (January 1, 2022): 171–99. http://dx.doi.org/10.3749/canmin.2100052.
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ABSTRACT The duopoly of curling stone sources suitable for international competition (Ailsa Craig, Firth of Clyde, Scotland and Trefor, Llŷn Peninsula, North Wales) has led to a long-held paradigm that the rocks from these localities are geologically unique. To evaluate this paradigm, we provide the first comprehensive, detailed analyses of the geological, mineralogical, and textural properties of curling stones, with a focus on three main areas: (1) the collective features of all curling stone lithologies, (2) the differences among the lithologies used for running bands versus striking bands, and (3) the presence of quartz, whose brittleness was previously considered to be undesirable in curling stones. The four curling stone varieties from the two localities (Ailsa Craig Blue Hone, Ailsa Craig Common Green, Blue Trefor, and Red Trefor) were analyzed using petrography, scanning electron microscopy, digital image analysis, powder X-ray diffraction, and normative mineralogy, with the following results: The curling stone varieties that are suitable for international competition can be broadly characterized as fine- to medium-grained, sparsely porphyritic to glomeroporphyritic, weakly to moderately altered, massive to weakly foliated, Phanerozoic granitoids (sensu lato). All four varieties are composed of feldspar (65–80 mod.%, with albite being the dominant component) and quartz (15–25 mod.%), along with mafic and accessory minerals (5–20 mod.%). The Ailsa Craig suite is classified as alkali feldspar quartz syenite, whereas the Trefor suite ranges from quartz monzogabbro (Blue Trefor) to granodiorite-granite (Red Trefor). None are strictly classified as granite.Predominantly equigranular textures are preferred for running bands (Ailsa Craig Blue Hone), whereas seriate to glomeroporphyritic textures are preferred for striking bands (Ailsa Craig Common Green, Blue Trefor, and Red Trefor). These are consistent with observations of used curling stones: pitting adversely affects larger grains in the running band, whereas a wider grain-size distribution correlates with fewer crescent-shaped fractures in the striking band.The appreciable abundance of unstrained, interstitial quartz (15–25 mod.%) in all curling stone samples challenges the longstanding belief of its absence and undesirability in curling stones. The degree of strain in quartz is likely to be a key criterion for selecting prospective curling stone materials. In conclusion, none of the examined characteristics of curling stones are unique in comparison to granitoids worldwide.
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Fitzpatrick, Scott M. "A massive undertaking: examining stone money in its archaeological context." Antiquity 76, no. 292 (June 2002): 331–32. http://dx.doi.org/10.1017/s0003598x00090372.
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Mueggler, Erik. "Corpse, Stone, Door, Text." Journal of Asian Studies 73, no. 1 (February 2014): 17–41. http://dx.doi.org/10.1017/s002191181300171x.
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Using tombstones as ethnographic sources, this article examines the introduction of writing into the field of death ritual in an Yi community in Yunnan Province, China. Most Tibeto-Burman-speaking peoples in Southwest China abandoned cremation in favor of burial in the eighteenth and nineteenth centuries, following a loss of political autonomy and a massive influx of immigrants from the interior. Inscriptions on stones, erected over buried corpses, shifted textual agency from skilled readers to knowledgeable or powerful writers and created links between state authority and the bodies of the dead. Stones became replacements for corpses, doors to the underworld, narratives of lives, and textual diagrams of kinship relations. Yi used stones to create new ways of conceptualizing and reaffirming social relations among living descendants. And they made much of the connection of writing with state authority, inserting their dead into the national time of revolution as the state's beneficiaries or victims.
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Thomas, Gordon D., Lin P. D. Barnetson, Catherine Brooks, Brenda Dickinson, Chris Going, George Haggarty, Katherine Hartley, et al. "Excavations at the Roman civil settlement at Inveresk, 1976-77." Proceedings of the Society of Antiquaries of Scotland 118 (November 30, 1989): 139–76. http://dx.doi.org/10.9750/psas.118.139.176.
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Antonine 1 structures include timber buildings and a stone furnace, while Antonine 2 saw rebuilding on a much grander scale with massive timber buildings and one stone building, all set on a grid with cobbled roads. Evidence of industrial activity may include production of a type of pottery unique to Inveresk. Other finds consist of iron tools, bronze jewellery, samian pottery and glass, some of unexpectedly high quality. A R
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King, Nicholas, Cory Jackson, and Sandip Zalawadiya. "MASSIVE LEFT ATRIAL CALCIFICATION, THE CASE OF A HEART OF STONE." Journal of the American College of Cardiology 77, no. 18 (May 2021): 2848. http://dx.doi.org/10.1016/s0735-1097(21)04203-0.
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Na, Joo-Young. "A heart of stone: an autopsy case of massive myocardial calcification." Forensic Science, Medicine and Pathology 14, no. 1 (December 2, 2017): 102–5. http://dx.doi.org/10.1007/s12024-017-9936-8.
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Mahesar, Muhammad Adeel, Waqar Ahmed Memon, Abdul Qayoom Ghanghro, Shabir Ahmed Mangi, Naveed Soomro, and Javed Altaf. "Effectiveness of Extracorporeal Shockwave Lithotripsy in Removing Small and Large Stones." Pakistan Journal of Medical and Health Sciences 17, no. 4 (May 6, 2023): 291–93. http://dx.doi.org/10.53350/pjmhs2023174291.
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Objective: To examined the efficacy of extracorporeal shockwave lithotripsy in the removal of small and large stones. Study Design: Observational prospective study. Place and Duration of Study: Department of Urology, Liaquat University of Medical and Health Sciences, Jamshoro from 1st January 2018 to 31st January 2019. Methodology: Two hundred patients, 139 males and 61 females, who underwent extracorporeal shockwave lithotripsy for stones were enrolled. The participants were separated into two groups based on stone size group A (stones measuring between 1.5 to 2.0 cm) and group B (stones measuring between 2.0 and 2.5 cm). Patients who were pediatric or had co-morbidities were excluded. The number of extracorporeal shockwave lithotripsy sessions and the number of beams per session were determined based on the clearance of the stones, if the radiology report indicated that the stones were completely cleared or if fragments smaller than 2 mm in diameter were present. Results: In group A, only 26 patients had partial clearance while in group B only 2 patients had partial clearance. The majority of the patients in both groups did not report any complications. The most common complaint was isolated haematuria, with 9 (4.5%) patients in the one session group, 16 (8%) in the two session group, and 5 (2.5%) in the three or more session group reporting this symptom Two patients in group A had hematoma along with haematuria, one patient in group A had massive haematuria that required transfusion, and one patient in each group reported having steintrasse with haematuria. In addition, one patient in group A had an isolated hematoma. Conclusion: Extracorporeal shockwave lithotripsy is effective and first-line treatment option for small renal stones. For ureteric stones, the location of stones should be taken into account, as this can have an effect on the stone-free rate and efficacy of extracorporeal shockwave lithotripsy. Keywords: Extracorporeal shockwave lithotripsy (ESWL), Stone removal, Ureteric Stones, Haematuria
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García-Segura, Guillermo, Mordecai-Mark Mac Low, and Norbert Langer. "The imprint of massive stellar evolution on circumstellar gas." Symposium - International Astronomical Union 163 (1995): 72–73. http://dx.doi.org/10.1017/s0074180900201678.
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We follow the interaction of massive stars with their circumstellar media over their entire lifetimes by combining several numerical models. We use a stellar evolution model for 35 and 60 M⊙ stars (Langer et al. in preparation) as inner boundary conditions for one- and two-dimensional gas dynamical models of the circumstellar medium using ZEUS (Stone & Norman 1992). In this poster, we focus on circumstellar evolution during the Luminous Blue Variable (LBV) and Wolf-Rayet (WR) stages.
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Jug, Jasmin, Kristijan Grabar, Stjepan Strelec, and Filip Dodigović. "Investigation of Dimension Stone on the Island Brač—Geophysical Approach to Rock Mass Quality Assessment." Geosciences 10, no. 3 (March 21, 2020): 112. http://dx.doi.org/10.3390/geosciences10030112.
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A site located on the island of Brač is known in history for world-famous architectural stone and stone mining, dating all the way back to ancient Greek and Roman times. The most famous building constructed from the stone from Brač is the Diocletian Cesar Palace in the town Split. Prospective new locations for quarries are still required because the demand for the stone from the island is still high. This paper presents a review of undertaken geophysical investigations, as well as engineering geologic site prospection, with the purpose of determining if the rock mass quality is suitable for the mining of massive blocks needed for an architectural purpose—dimension stones. Several surface noninvasive geophysical methods were applied on the site, comprising of two seismic methods, multichannel analysis of surface waves (MASW) and shallow refraction seismic (SRS) electrical methods of electrical resistivity tomography (ERT), as well as electromagnetic exploration with ground penetrating radar (GPR). Results of geophysical investigations were compared to the engineering geologic prospection results, as well to the visible rock mass structure and observed discontinuities on the neighboring existing open mine quarry. Rock mass was classified into three categories according to its suitability for dimension stone exploitation. Each category is defined by compressional and shear seismic velocities as well as electrical resistivity. It has been found that even small changes in moisture content within the large monolithic rock mass can influence measured values of electrical resistivity. In the investigated area, dimension stone quarrying is advisable if the rock mass has values of resistivity higher than 3000 Ωm, as well as compressional seismic velocities higher than 3000 m/s and shear wave velocities higher than 1500 m/s. Georadar was found to be a good tool for the visual determination of fissured systems, and was used to confirm findings from other geophysical methods.
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Tang, Ke, Haiwen Yuan, Jianxun Lv, and Fengchen Chen. "Developing an Intelligent Monitoring Technology for Airport Stone Column Machines." Sensors 20, no. 11 (May 28, 2020): 3050. http://dx.doi.org/10.3390/s20113050.
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Most of the construction machinery for vibro-sinking stone columns, which are widely used in China, needs to be improved in terms of degree of automation. Engineering quality control is mainly carried out post-inspection; consequently, it is difficult to control the construction quality in real time. According to the construction characteristics of traditional stone column machines, we established the theory and model for the real-time monitoring of stone column construction, as well as put forward an intelligent monitoring method for stone column machines. With the comprehensive application of critical technologies such as the Global Navigation Satellite System (GNSS) measurement technology, laser ranging sensors, and massive data processing, an intelligent data acquisition technique and associated monitoring equipment for stone column construction machines are developed. The data acquisition and storage of crucial construction parameters, such as pile depth, pile point co-ordinates, bearing layer current, and reverse insertion times, are realized. A large number of actual construction data are collected and the construction quality parameters of stone column machines are obtained. By comparison with third-party detection data, it is verified that the intelligent monitoring technique for stone column machines proposed in this paper is feasible.
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Milner, George R., Scott W. Hammerstedt, and Kirk D. French. "Chert hoes as digging tools." Antiquity 84, no. 323 (March 1, 2010): 103–13. http://dx.doi.org/10.1017/s0003598x00099798.
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What type of implement was used to cut and move earth in prehistory? In the Mississippian culture at least, the key tool was the stone hoe – formed from a chert blade strapped to a handle. These blades were hoarded and depicted in use, leaving little doubt that they were for digging, in the service of agriculture and extracting earth for building. Drawing on a series of controlled experiments, the authors deduce the capabilities and biographies of the stone hoes, evoking the admirable efforts of the people who constructed the massive mounds of Cahokia.
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mink, nicolaas. "Selling the Storied Stone Crab: Eating, Ecology, and the Creation of South Florida Culture." Gastronomica 6, no. 4 (2006): 32–43. http://dx.doi.org/10.1525/gfc.2006.6.4.32.
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"Selling the Storied Stone Crab" examines the intersection between eating and the environment in South Florida using the stone crab, a highly-prized local delicacy, and the world-renowned restaurant that purportedly first began serving them, Joe's Stone Crab, as lenses through which to analyze regional identity, conceptions of place, and the social, cultural, generational and class distinctions that have arisen through consuming the crustacean over the twentieth-century. The work is both an institutional and corporate history of Joe's Stone Crab and an environmental and cultural history of the stone crab. In an area defined by striking transience, tourism, and massive growth, the essay argues that people envisioned themselves becoming indigenous to South Florida's unique natural and cultural landscape through the ingestion of a food that they believed could only be attained in the region. But the common perception that most gourmands hold--that the stone crab can only be procured in South Florida--is in itself a myth. The stone crab can be purchased worldwide, it is not strictly indigenous to South Florida, nor did Joe's Stone Crab first serve the decapod. Nevertheless, "Selling the Storied Stone Crab" concludes that these points are inconsequential for most visitors and residents who continue to relish both the crustacean's sweet meat and the myths that surround its eating.
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Grami, Zacharia, Nirmala Manjappachar, John Crommett, and Dereddi Raja Reddy. "1022: UTILIZATION OF UROLOGICAL STONE RETRIEVAL BASKET FOR RESOLUTION OF MASSIVE HEMOPTYSIS." Critical Care Medicine 48, no. 1 (January 2020): 490. http://dx.doi.org/10.1097/01.ccm.0000643024.84108.5a.
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Crowther, Paul A. "Massive Stars in the Tarantula Nebula: A Rosetta Stone for Extragalactic Supergiant HII Regions." Galaxies 7, no. 4 (November 8, 2019): 88. http://dx.doi.org/10.3390/galaxies7040088.
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A review of the properties of the Tarantula Nebula (30 Doradus) in the Large Magellanic Cloud is presented, primarily from the perspective of its massive star content. The proximity of the Tarantula and its accessibility to X-ray through radio observations permit it to serve as a Rosetta Stone amongst extragalactic supergiant HII regions since one can consider both its integrated characteristics and the individual properties of individual massive stars. Recent surveys of its high mass stellar content, notably the VLT FLAMES Tarantula Survey (VFTS), are reviewed, together with VLT/MUSE observations of the central ionizing region NGC 2070 and HST/STIS spectroscopy of the young dense cluster R136, provide a near complete Hertzsprung-Russell diagram of the region, and cumulative ionizing output. Several high mass binaries are highlighted, some of which have been identified from a recent X-ray survey. Brief comparisons with the stellar content of giant HII regions in the Milky Way (NGC 3372) and Small Magellanic Cloud (NGC 346) are also made, together with Green Pea galaxies and star forming knots in high-z galaxies. Finally, the prospect of studying massive stars in metal poor galaxies is evaluated.
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Singh, Manager Rajdeo, and Rajendra Yadav. "Formation of Calcium Oxalate Patinas as Protective Layer on Basaltic Stone Surfaces of 17th Century Raigad Hill Fort, India." Heritage 6, no. 7 (July 14, 2023): 5374–92. http://dx.doi.org/10.3390/heritage6070283.
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This work reports calcium oxalate film formation on basaltic stone surfaces of the 17th-century western India Raigad Hill Fort. Nine stone samples extracted from the exterior surfaces of different historical structures of the fort were investigated under FTIR, optical microscopy, XRD, and SEM-EDX. The FTIR spectroscopy revealed intense peaks for Ca-oxalate patinas on basaltic stone surfaces. Observation under optical microscopy clearly showed milky white oxalate films, and peaks for crystalline calcium oxalate, including rock silicates, were prominently observed through XRD investigations. The surface morphology, the origin of the oxalate film, and the state of conservation of the basalt rock were investigated through SEM-EDX. The massive structures at Raigad, at a height of about 800 m, have hardly been chemically cleaned or coated with preservatives in the past. The presence of organic filaments in SEM photomicrographs indicated the biological origin of the oxalate patina due to the thick growth of microbiota on the monument stone during very heavy monsoons. The oxalic acid secreted by microbes dislodged the Ca-rich plagioclase of the stone, ensuring Ca-ions’ availability for film formation. The optical and mineralogical analyses suggest that the film is not the result of simple deposition but of the surface transformation of basaltic stone.
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Salih, Nihad Bahaaldeen. "An Experimental Study of Compaction and Strength of Stabilized Cohesive Soil by Stone Powder." Journal of Engineering 28, no. 12 (December 1, 2022): 125–36. http://dx.doi.org/10.31026/j.eng.2022.12.09.
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The In this experimental study, natural stone powder was utilized to improve a cohesive soil’s compaction and strength properties. According to the significant availability of limestone in the globe, it has been chosen for the purpose of the study, in addition to considering the existing rock industry massive waste. Stone powder was used in percentages of 4, 8, 12, 16% replaced from the soil weight in dry state. Some of cohesive soil’s consistency, shear, and compaction properties were depicted after improvement. The outcomes yielded in significant amendments in the experimented geotechnical properties after stone powder addition considering 60 days curing period. Cohesion and friction angle were notably increased by 12% and 21% respectively. This study can provide an experimental basis for the stabilization mechanism of the fine-grained soil, and guidance for the better stabilization scenario by available cheap natural resources and waste.
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Bradley, Richard, Chris Ball, Sharon Croft, and Tim Phillips. "The stone circles of northeast Scotland in the light of excavation." Antiquity 76, no. 293 (September 2002): 840–48. http://dx.doi.org/10.1017/s0003598x00091328.
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The stone circles of northeast Scotland (Figure 1) take a most distinctive form. On one level, they are made up of structural elements that are widely distributed in Britain: they are built from raw materials that had been selected for their colour and texture; the monoliths are graded in height towards the southwest and may have been aligned on the moon (Burl 2000). On another level, they have a character all of their own. They are known as ‘recumbent’ stone circles because their most massive component is a large flat block which is bracketed by two tall pillars or ‘flankers’ (Burl 2000: 215–33).
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Fazio, Jane C., Sheiphali A. Gandhi, Jennifer Flattery, Amy Heinzerling, Nader Kamangar, Nawal Afif, Kristin J. Cummings, and Robert J. Harrison. "Silicosis Among Immigrant Engineered Stone (Quartz) Countertop Fabrication Workers in California." Guides Newsletter 29, no. 1 (January 1, 2024): 1–3. http://dx.doi.org/10.1001/amaguidesnewsletters.2024.janfeb01.
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Key Points Question What are the characteristics of patients in California with silicosis from occupational exposure to dust from engineered stone (quartz), a popular material that is high in silica content and that is used to fabricate countertops? Findings In this case series of 52 patients, the median age was 45 years at diagnosis, and nearly all were Latino immigrant men. Diagnosis was delayed in 58%, with 38% presenting with advanced disease (progressive massive fibrosis), and 19% died. Meaning In California, silicosis associated with occupational exposure to dust from engineered stone primarily occurred among young Latino immigrant men; many patients presented with severe disease, and some cases were fatal.
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Baldassare, Vivienne F., Nicholas C. Stone, Adi Foord, Elena Gallo, and Jeremiah P. Ostriker. "Massive Black Hole Formation in Dense Stellar Environments: Enhanced X-Ray Detection Rates in High-velocity Dispersion Nuclear Star Clusters." Astrophysical Journal 929, no. 1 (April 1, 2022): 84. http://dx.doi.org/10.3847/1538-4357/ac5f51.
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Abstract We analyze Chandra X-ray Observatory imaging of 108 galaxies hosting nuclear star clusters (NSCs) to search for signatures of massive black holes (BHs). NSCs are extremely dense stellar environments with conditions that can theoretically facilitate massive BH formation. Recent work by Stone et al. finds that sufficiently dense NSCs should be unstable to the runaway growth of a stellar-mass BH into a massive BH via tidal captures. Furthermore, there is a velocity dispersion threshold (40 km s−1) above which NSCs should inevitably form a massive BH. To provide an observational test of these theories, we measure X-ray emission from NSCs and compare it to the measured velocity dispersion and tidal capture runaway timescale. We find that NSCs above the 40 km s−1 threshold are X-ray detected at roughly twice the rate of those below (after accounting for contamination from X-ray binaries). These results are consistent with a scenario in which dense, high-velocity NSCs can form massive BHs, providing a formation pathway that does not rely on conditions found only at high redshift.
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Handayani, Agil Fitri, Dyah Hayu Rosyidah, Roro Sulaksitaningrum, Prijono Bagus Susanto, and Sri Umniati. "Andesite waste powder as mineral admixture in concrete: A Review." E3S Web of Conferences 445 (2023): 01030. http://dx.doi.org/10.1051/e3sconf/202344501030.
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Massive production of andesite natural stone causes environmental problems due to the large amount of powder waste produced. Andesite stone contains a high percentage of SiO2 which indicates its possibility to be used as a mineral additive for concrete. Research that has been conducted by researchers from various countries shows that andesite stone has fine grains with a specific gravity of 2.66 - 2.68, Loss on Ignition 2.37 - 3.38, has a content of SiO2+Al2O3+Fe2O3>70% which can be classified as fly ash type F based on ASTM 618-92a. The use of andesite stone powder waste as a partial replacement of cement in concrete showed that concrete properties improved at an optimum of 10% at 28 days and 90 days of concrete age, respectively. The use of andesite waste powder in larger quantities showed a decrease in concrete properties. The use of andesite powder waste in concrete is recommended to reduce the impact of waste on the environment as well as to reduce the use of cement in concrete as an effort to support sustainable and more environmentally friendly construction.
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Agarwal, VarunVishnu, MukundGopalkrishna Andankar, and HemantRangnath Pathak. "Endoscopic management of massive stone load in a patient with repaired bladder exstrophy." Archives of International Surgery 8, no. 1 (2018): 38. http://dx.doi.org/10.4103/ais.ais_7_18.
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Alomar-Garau, Gabriel, Miquel Grimalt Gelabert, and Joan Bauzà Llinàs. "Cartographic determination of the dry stone walls of the Mallorcan Tramuntana mountain range (Balearic Islands): Exploratory analysis." Journal of Geography and Cartography 5, no. 2 (October 31, 2022): 110. http://dx.doi.org/10.24294/jgc.v5i2.1678.
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The construction technique of dry stone, declared Intangible Cultural Heritage of Humanity by UNESCO, has historically materialized in Mallorca in the form of a varied range of constructions with different functions. The massive construction of dry stone walls in the Mallorcan countryside has left an outstanding landscape and territorial imprint, which constitutes a rich source of geographical analysis. An unpublished cartography of the walls located in the Serra de Tramuntana mountain range in Mallorca is presented as an essay, a cartography that has served as a basis for their classification and provisional quantification. With the support of basic cartographic, photo-interpretation and GIS techniques, the detailed examination of two official cartographic bases has allowed us to determine their usefulness as reliable sources for locating and understanding the dry stone walls in our study area, with a view to a more far-reaching geographical study of them.
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Dawson, Paul A., Pearl Sim, David W. Mudge, and David Cowley. "HumanSLC26A1Gene Variants: A Pilot Study." Scientific World Journal 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/541710.
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Kidney stones are a global health problem, incurring massive health costs annually. Why stones recur in many patients remains unknown but likely involves environmental, physiological, and genetic factors. The solute linked carrier (SLC) 26A1 gene has previously been linked to kidney stones in mice.SLC26A1encodes the sulfate anion transporter 1 (SAT1) protein, and its loss in mice leads to hyperoxaluria and calcium oxalate renal stones. To investigate the possible involvement of SAT1 in human urolithiasis, we screened theSLC26A1gene in a cohort of 13 individuals with recurrent calcium oxalate urolithiasis, which is the commonest type. DNA sequence analyses showed missense mutations in seven patients: one individual was heterozygous R372H; 4 individuals were heterozygous Q556R; one patient was homozygous Q556R; and one patient with severe nephrocalcinosis (requiring nephrectomy) was homozygous Q556R and heterozygous M132T. The M132 amino acid in human SAT1 is conserved with 15 other species and is located within the third transmembrane domain of the predicted SAT1 protein structure, suggesting that this amino acid may be important for SAT1 function. These initial findings demonstrate genetic variants inSLC26A1of recurrent stone formers and warrant wider independent studies ofSLC26A1in humans with recurrent calcium oxalate stones.
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Pratt, Brian R., and Graham A. Young. "Heritage Stone 9. Tyndall Stone, Canada’s First Global Heritage Stone Resource: Geology, Paleontology, Ichnology and Architecture." Geoscience Canada 50, no. 2 (July 17, 2023): 17–51. http://dx.doi.org/10.12789/geocanj.2023.50.196.
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Tyndall Stone is a distinctively mottled and strikingly fossiliferous dolomitic limestone that has been widely used for over a century in Canada, especially in the Prairie Provinces. It comprises 6–8 m within the lower part of the 43 m thick Selkirk Member of the Red River Formation, of Late Ordovician (Katian) age. It has been quarried exclusively at Garson, Manitoba, 37 km northeast of Winnipeg, since about 1895, and for the past half-century extraction has been carried out solely by Gillis Quarries Ltd. The upper beds tend to be more buff-coloured than the grey lower beds, as a result of groundwater weathering. Tyndall Stone, mostly with a smooth or sawn finish, has been put to a wide variety of uses, including exterior and interior cladding with coursed and random ashlar, and window casements and doorways. Split face finish and random ashlar using varicoloured blocks split along stylolites have become popular for commercial and residential buildings, respectively. Tyndall Stone lends itself to carving as well, being used in columns, coats of arms and sculptures. Many prominent buildings have been constructed using Tyndall Stone, including the provincial legislative buildings of Saskatchewan and Manitoba, the interior of the Centre Block of the House of Commons in Ottawa, courthouses, land titles buildings, post offices and other public buildings, along with train stations, banks, churches, department stores, museums, office buildings and university buildings. These exhibit a variety of architectural styles, from Beaux Arts to Art Deco, Châteauesque to Brutalist. The Canadian Museum of History and the Canadian Museum for Human Rights are two notable Expressionist buildings. The lower Selkirk Member is massive and consists of bioturbated, bioclastic wackestone to packstone, rich in crinoid ossicles. It was deposited in a low-energy marine environment within the photic zone, on the present-day eastern side of the shallow Williston Basin, which was part of the vast equatorial epicontinental sea that covered much of Laurentia at the time. Scattered thin bioclastic grainstone lenses record episodic, higher energy events. Tyndall Stone is spectacularly fossiliferous, and slabs bearing fossils have become increasingly popular. The most common macrofossils are receptaculitids, followed by corals, stromatoporoid sponges, nautiloid cephalopods, and gastropods. The relative abundance of the macrofossils varies stratigraphically, suggesting that subtle environmental changes took place over time. The distinctive mottles—‘tapestry’ in the trade—have been regarded as dolomitized burrows assigned to Thalassinoides and long thought to have been networks of galleries likely made by arthropods. In detail, however, the bioclastic muddy sediment underwent a protracted history of bioturbation, and the large burrows were mostly horizontal back-filled features that were never empty. They can be assigned to Planolites. The matrix and the sediment filling them were overprinted by several generations of smaller tubular burrows mostly referrable to Palaeophycus due to their distinctive laminated wall linings. Dolomite replaced the interiors of the larger burrows as well as smaller burrows and surrounding matrix during burial, which is why the mottling is so variable in shape.
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Hoy, Ryan F., Timothy Baird, Gary Hammerschlag, David Hart, Anthony R. Johnson, Paul King, Michael Putt, and Deborah H. Yates. "Artificial stone-associated silicosis: a rapidly emerging occupational lung disease." Occupational and Environmental Medicine 75, no. 1 (September 7, 2017): 3–5. http://dx.doi.org/10.1136/oemed-2017-104428.
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IntroductionArtificial stone is an increasingly popular material used to fabricate kitchen and bathroom benchtops. Cutting and grinding artificial stone is associated with generation of very high levels of respirable crystalline silica, and the frequency of cases of severe silicosis associated with this exposure is rapidly increasing.AimTo report the characteristics of a clinical series of Australian workers with artificial stone-associated silicosis.MethodsRespiratory physicians voluntarily reported cases of artificial stone-associated silicosis identified in their clinical practices. Physicians provided information including occupational histories, respiratory function tests, chest radiology and histopathology reports, when available.ResultsSeven male patients were identified with a median age of 44 years (range 26–61). All were employed in small kitchen and bathroom benchtop fabrication businesses with an average of eight employees (range 2–20). All workplaces primarily used artificial stone, and dust control measures were poor. All patients were involved in dry cutting artificial stone. The median duration of exposure prior to symptoms was 7 years (range 4–10). Six patients demonstrated radiological features of progressive massive fibrosis. These individuals followed up over a median follow-up period of 16 months (IQR 21 months) demonstrated rapid decline in prebronchodilator forced expiratory volume in 1 s of 386 mL/year (SD 204 mL) and forced vital capacity of 448 mL/year (SD 312 mL).ConclusionsThis series of silicosis in Australian workers further demonstrates the risk-associated high-silica content artificial stone. Effective dust control and health surveillance measures need to be stringently implemented and enforced in this industry.
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Gorbanenko, Serhii, Mykola Ilkiv, Liubomyr Mykhailyna, and Bohdan Ridush. "Millstones from Revne at Bukovyna." Archaeology, no. 3 (September 22, 2021): 117–29. http://dx.doi.org/10.15407/arheologia2021.03.117.
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In the article stones from light hand millstones from Revne group of settlements of the 8th — 10th centuries left by the Slavs — bearers of the Raiky archaeological culture are published (fig. 1; 2). The lithological composition of rocks was determined. The millstones were made of two types of rocks: 1 — organogenic-detrital limestone, layered, cavernous, grayish-yellow (fig. 3: 1, 2); 2 —organogenic detrital limestone, massive, finely cavernous, yellowish-gray (fig. 3: 3). Such rocks are typical for the area of Revne agglomeration. This confirms the local origin of the raw materials (fig. 4). The rocks can be easily processed with iron tools. At the same time, they are strong enough and not prone to fracture and small fracturing. An average density of limestone is 2.7 g/cm3. Millstones are widely known from the materials of the Raiky culture sites (fig. 5). Probably, in all cases, local raw materials were used. On this background mention of the finds of grain graters occurs in scientific literature less often. In the materials of Revne agglomeration of the 8th — 10th centuries grain graters are unknown. Discovered millstones are divided into «spoilage» or blank (fig. 3: 1), bed stone (fig. 3: 2) and runner stone (fig. 3: 3). There is a sufficient basis for the general reconstruction of a light hand millstone. It consists of archaeological finds (stones and occasionally other parts made of iron and wood), ethnographic and iconographic data (fig. 6). All these sources were qualitatively analysed by R. S. Minasyan and he proposed his own classification. Today, we consider his work to be the most generalizing and reliable basis for descriptive reconstruction of the millstone. However, the classification itself is not quite user-friendly. Therefore, we offer systematization as a combination of main features. It is presented in a tabular form (fig. 7). According to the proposed systematization, the millstones from Revne can be characterized as ІІ.2.A—B — bed stone with a hole and a wooden pin (not preserved), with runner stone and rind (not preserved), with a hole for a handle of indeterminate length (not preserved).
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Mahar, Naveed Ahmed, Harris Hassan Qureshi, Mohsin Mustafa Memon, Ghullam Mustafa Kalhorro, Sara Rasheed Kalwar, and Asad Shahzad Hassan. "Prevalence of Urinary Tract Infection among Patients Presenting with Complex Renal Stones at SIUT." Pakistan Journal of Medical and Health Sciences 16, no. 5 (May 29, 2022): 1077–79. http://dx.doi.org/10.53350/pjmhs221651077.
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Introduction: The link between stone formation and urinary tract infections (UTIs) is complicated; research has primarily focused on bacteria's potential to stimulate the formation of kidney stones. Infective urolithiasis has long been thought to be the result of a urinary tract infection (UTI) caused by bacteria, most commonly belonging to the Proteus genus. Staghorn stone, which is characterised by a massive calculus entirely occupying the renal pelvicalyceal system, is one of the most common kinds of infective lithiasis. This study can serve in identifying the risk of UTI in a patient with complex renal stones, as well as preventing and intervening early. Objective: The goal of this study was to investigate the prevalence of urinary tract infections (UTIs) among patients with complex renal stones who were sent to the Sindh Institute of Urology and Transplantation. Subject and Methods: This cross-sectional study was conducted at Sindh Institute of Urology and Transplantation's out-patient urology department. This study included a total of 113 patients with complex renal stones. Culture and sensitivity (C/S) tests were performed on a urine sample supplied to the SIUT microbiology lab. The C/S results were gathered and categorized as positive or negative according to the operational criteria. Results: The patients' average age was 30.83±8.29 years. There were 45 females (39.82 %) and 68 males (60.18 %). A urinary tract infection was observed in 22.12 % (25/113) of patients with complex renal stones. Conclusion: We discovered a high prevalence of urinary tract infection in individuals with complex renal stones, and we propose that patients with acute nephrolithiasis have urine cultures taken and be monitored closely. Empiric therapy should be considered for patients with pyuria, women, or those with clinical characteristics suggestive of infection if sensitivity to diagnose urinary tract infection is to be prioritized because of the potentially serious consequences of under-treatment Keywords: Nephrolithiasis, Urinary tract infections, Complex renal stones, Staghorn Stones.
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Bestuzheva, Aleksandra, and Dimitri Gadai. "Efficiency justification for stone-concrete face zone of rockfill dams with reinforced concrete face." E3S Web of Conferences 264 (2021): 03022. http://dx.doi.org/10.1051/e3sconf/202126403022.
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At present, over 600 dams with a reinforced concrete face are built worldwide; 7 of them are higher than 200 m. However, most of these dams have an inherent disadvantage – face cracking [1, 2, 3], caused by face deformations resulted from the difference in deformation properties of the face and downstream toe. To solve this problem, the authors consider the arrangement of a massive stone-concrete face zone.
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Gmyrya, Ludmila B. "THE RUBAS FORTIFICATION OF THE MID-SIXTH CENTURY: STRUCTURAL FEATURES OF THE WESTERN FACADE OF WALL 2." History, Archeology and Ethnography of the Caucasus 18, no. 4 (December 25, 2022): 1061–86. http://dx.doi.org/10.32653/ch1841061-1086.
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The Rubas fortification is a complex of stone military engineering structures, opened in 2014 in the lower reaches of the river. Rubas, 20 km SW from the city of Derbent. In terms of functional orientation, this archaeological object belongs to a series of monumental barrier structures erected in the Caspian Passage (Eastern Caucasus) by Sasanian Iran with the financial participation of Byzantium in the 5th–6th centuries, preventing raids of nomadic tribes into the countries of Transcaucasia and the Middle East. Typologically and chronologically (6th c.), the Rubas defensive complex is comparable to the stone fortifications of Derbent.Excavations (2014, 2016-2018, 2020) on the territory of the archaeological site revealed 6 separate military-technical structures. The connecting link in this complex is the main wall No. 2, oriented in the meridian direction (NW-SE), opened for 28 m. Three structures of the complex, oriented in the latitudinal direction (W-E), were connected to wall No. 2.Wall No. 2 is structurally distinguished by its monumentality. It was built using armored technique from massive, well-hewn stone blocks with internal backfilling from clastic material, including pebble stones and soil. The thickness of the wall is 3.2–3.5 m.A feature of the structure of wall No. 2 is that its facades (eastern and western) are combined. On the eastern facade, 5 building sections are visually distinguished, made using different technological methods. An analysis of engineering solutions during the construction of the eastern facade of wall No. 2 showed that they were due to certain functional tasks, both general defensive and specific, which ensured the strength of the building as a whole.
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Kulig, Anna. "About historic stonework in Kraków." Teka Komisji Architektury, Urbanistyki i Studiów Krajobrazowych 13, no. 3 (January 12, 2018): 7–13. http://dx.doi.org/10.35784/teka.1709.
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Massive fragments of portals, mouldings, and columns which are stored in stone collections and museum storage rooms are today of no particular interest. They spur the visitors’ imagination only slightly; there, just a piece of stone, carved, yet incomplete, broken. Can this legacy, difficult in perception, be shown in a different way and made memorable? Can it be made close to the audience? The concepts of the pioneers of conservation of historical objects are worth referencing. Realized concepts testify for an attitude of respect towards the legacy and traditions. Gothic architectural details that were abandoned during demolitions of historical structures in the 19th century, have survived elsewhere, “incrusted” in other structures. It happened in the walls of Collegium Maius, The Bishop Erazm Ciołek Palace, Pusłowscy Palace, Lubomirscy Palace, Tadeusz Stryjeński Palace. They were often treated as native relics. Saved from destruction and from being forgotten they adorn facades, interiors and gardens. Perhaps the idea and the examples of stone collections will spur a reflection and inspiration in designers today.
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LUBIS, MUHAMMAD ZAINUDDIN, SRI PUJIYATI, DANIEL S. PAMUNGKAS, MUHAMMAD TAUHID, WENANG ANUROGO, and HUSNUL KAUSARIAN. "Coral reefs recruitment in stone substrate on Gosong Pramuka, Seribu Islands, Indonesia." Biodiversitas Journal of Biological Diversity 19, no. 4 (July 1, 2018): 1451–58. http://dx.doi.org/10.13057/biodiv/d190435.
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Lubis MZ, Pujiyati S, Tauhid M, Anurogo W, Kausarian H. 2018. Coral reefs recruitment in stone substrate on GosongPramuka, Seribu Islands, Indonesia. Biodiversitas 19: 1451-1458. Gosong Pramuka is a reef distribution area located in the center of theSeribu Islands of Jakarta, Indonesia. This research was conducted from April to June 2015, located within the Gosong Pramuka area,Kepulauan Seribu, Indonesia. This location has 4 observation stations: Exposed I and II and Shielded I and II. Coral reefs identified atthe study sites consisted of 95 colonies, with colonies most abundant in Exposure Station I (35 colonies), and in the genus Acropora andPorites. Acropora coral growth is tabulated, branching, digitate and encrusting, and Porites are only sub-massive and massive. Theaverage area obtained from recruiting coral colonies had a range of 25-50 cm2, and the average diameter of coral recruits was 9-12 cm.The results of this research determined the coral health index of the area is 2-3. Based on the CoralWatch method, the coral at the stationwhere the research was conducted is classified as under stress conditions. The value of recalculated coral density obtained in this studywas 0.22 colony/m2 at Exposure Station I, 0.11 colony/m2 at Shielded Station I, 0.13 colony/m2 at Exposure Station II, and in 0.11colony/m2 at Shielded Station II. Temperatures in all four stations range from 30-32°C; this temperature range is within the optimumtemperature range for coral growth. The depth at all four stations was in the ranged from 70-98 cm; this indicates the stations where theresearch was conducted is still within an optimum depth.
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Al Kaissi, Ali, Sami Bouchoucha, Mohammad Shboul, Vladimir Kenis, Franz Grill, Rudolf Ganger, and Susanne Gerit Kircher. "Massive Axial and Appendicular Skeletal Deformities in Connection with Gorham-Stout Syndrome." Medicines 6, no. 2 (May 7, 2019): 54. http://dx.doi.org/10.3390/medicines6020054.
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Background: Etiological understanding is the corner stone in the management of skeletal deformities. Methods: Multi-centre study of patients with deformities in connection with diverse etiological backgrounds. We aimed to study four patients (one boy and three girls) with variable axial and appendicular deformities in connection with a vanishing bone disorder. Results: Axial deformities such as scoliosis, kyphoscoliosis, compressed fused vertebrae, appendicular fractures, dislocations, and vicious disorganization deformities of the joints were in connection with the vanishing bone disorder, namely Gorham-Stout syndrome. Conclusions: It is mandatory to establish proper clinical and radiological phenotypic characterization in children and adults presented with unusual skeletal deformities. Identifying the reason behind these deformities is the key factor to draw a comprehensive management plan.
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Cioarec, Ileana. "CULA BURNAZ DIN SATUL CRAINICI, JUDEȚUL MEHEDINȚI." Arhivele Olteniei 37 (December 21, 2023): 95–102. http://dx.doi.org/10.59277/ao.37.07.
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Originally from Banat, the Burnaz family is mentioned as the owner of the Crainici estate at the end of the 18 th century, when Gheorghe Burnaz bought it from members of the Glogoveanu family. On this estate, the son of Gheorghe Burnaz, Constantin built at the beginning of the 19 th century a tower which, unfortunately, is no longer preserved today. The cula has a square shape and two floors. The masonry was massive brick, combined with stone career.
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Darvill, Timothy. "Figures in the Rock? Experiencing the Avebury Cove at the Midsummer Sunrise." Journal of Skyscape Archaeology 8, no. 2 (February 13, 2023): 279–90. http://dx.doi.org/10.1558/jsa.25600.
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Despite published accounts suggesting the absence of solstitial alignments built into the architecture of the stone circle complex within the classic henge at Avebury, north Wiltshire, UK, empirical observations show that the group of stones and the space between them known as the Cove opens towards the midsummer sunrise. Although the window of visibility looking out from the Cove is broad, the sunrise position, on Monkton Down, is central to the field of view. A dip in the henge bank and the presence of a round barrow on the skyline serve to emphasise the point on the horizon where the Sun first appears. Looking inwards, the Cove provides a defined stage-like setting with the shadows of anyone performing there cast sharply onto the massive backstone for a period of about 30 minutes after sunrise. Comparisons are drawn with practices linked to animistic ontologies where rock surfaces become porous doorways into other realms during defined ceremonial observances.
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OʼKeefe, Kevin J., David Backstedt, Ramin D. Bagheri, and Teodor Pitea. "Massive Common Bile Duct Stone Lithotripsy and Removal by Direct Peroral Cholangioscopy with a Gastroscope." American Journal of Gastroenterology 111 (October 2016): S526—S527. http://dx.doi.org/10.14309/00000434-201610001-01202.
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Visser, Martin, Christian Messner, and Steffen Rehbein. "Massive Infestation with fur mites (Lynxacarus mustelae) of a stone marten (Martes foina) from Tyrol." Wiener klinische Wochenschrift 123, S1 (July 7, 2011): 36–42. http://dx.doi.org/10.1007/s00508-011-0005-0.
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Ware-Nagy, Orsolya. "Szellemidézés." Metszet 12, no. 5 (2021): 32–37. http://dx.doi.org/10.33268/met.2021.5.2.
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Coherent restoration of religious buildings or groups of buildings often depends upon settling the discussion between issues of partial demolition, reconstruction, or intervention. This project derives its solution from given forms bounded by existing walls, roofline, and enclosure of the covent courtyard. The use of Corten steel and copper sheet created a balance between the existing massive stone walled buildings and a new perforated dynamic of space. The result being processional, contemporary, without losing its sense of place and time.
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Belousova, Natalia, Anton Rodionov, Andrey Vishnevskiy, Alexander Fedorchenko, Valeria Mikhienko, and Maxim Seletskiy. "Initial and Early Upper Palaeolithic “Thin” Leaf-shaped Bifaces: Technology, Shaping and Stone Raw Material." Stratum plus. Archaeology and Cultural Anthropology, no. 1 (February 27, 2022): 329–53. http://dx.doi.org/10.55086/sp221329353.
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The tradition of producing bifacial leafshaped points in Altai demonstrates a relationship with the culture and life support strategies of its earliest Upper Palaeolithic inhabitants. Here we present the reconstruction of bifacial technologies, based on the study of published data and archaeological collections, the latest results of geological and mineralogical data and experiments. The application of the well-known techniques of processing thin flint bifaces characteristic of the Russian Plain to the raw materials of Altai and to the local canons of producing bifacial tools makes it possible to reveal a number of factors that have a considerable effect on the morphology of the bifacial end products. We concluded that the transition from the massive Middle Palaeolithic bifaces to the thin and symmetrical leafshaped forms of the Initial and Early Upper Palaeolithic was associated with changes in stone processing. We found that the peculiarities of the Altai raw materials with their specific consumer characteristics and a high level of petrographic diversity did not exert much influence on the techniques of biface manufacture, but had a profoiund effect on the process of secondary thinning. As a result, the finished products turned out to be more massive than those made of flint. The results of the study confirm the need for a flexible approach to understanding the term «thin» biface.
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Kurek, Jan. "THIRA – TOWNS ON A VOLCANO." Space&FORM 2022, no. 51 (November 16, 2022): 27–50. http://dx.doi.org/10.21005/pif.2022.51.b-02.
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The architecture of the cities and towns of the Greek isles is characterized by an individuality and picturesqueness of forms. The historical, massive stone structures are currently being replaced by new, attractive forms, subjected to the requirements of contemporary life and serving heavy tourist traffic, especially during summer months. This also requires the introduction of modern technologies that are necessary for them to function – this applies to waste and water management and power supply. The entirety is characterized by a unique, harmonious visuality and organicity of forms.
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Jakubauskas, Matas, Raminta Luksaite, Audrius Sileikis, Kestutis Strupas, and Tomas Poskus. "Gallstone Ileus: Management and Clinical Outcomes." Medicina 55, no. 9 (September 17, 2019): 598. http://dx.doi.org/10.3390/medicina55090598.
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Background: Gallstone or biliary ileus is a late complication of gallstone disease. It accounts for 1%–4% of all bowel obstructions and is more common in elderly patients. The preferred treatment option is to mechanically remove the impacted stones. It is done surgically using open or laparoscopic approach and rarely, when stones are impacted in the colon, endoscopically. In this paper we present five consecutive cases of gallstone ileus and describe possible diagnostic and minimally invasive treatment options. Case presentation: During a five-month period a total of five patients were treated for gallstone ileus. All patients were female and from 48 to 87 years of age. Symptoms were not specific and common for all small bowel obstructions. Upon admission the patients also had unspecific laboratory findings—neutrophilic leukocytosis and various C-reactive protein concentrations, ranging from 8 to 347 mg/L. According to the hospital protocol, all patients initially underwent an abdominal ultrasound, which was inconclusive, and therefore every patient additionally had a CT scan with intravenous contrast. After these two diagnostic modalities one patient still did not have the definitive gallstone ileus diagnosis, as the ectopic stone was not visible. Four patients in our case series were treated using minimally invasive methods: in one case the stone was removed endoscopically, and laparoscopically in the other three. Treatment outcomes were good in four cases as the patients fully recovered, however one patient suffered a massive cerebral infarction after the operation and passed away. Conclusions: Gallstone ileus is a rare and difficult-to-diagnose condition. Management of these patients in every case should be individualized, as there are many options, each with their own advantages and disadvantages. We show that minimally invasive treatment such as colonoscopy or laparoscopy is possible in these cases.
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Stasyuk, O. "Restoration of natural stone architectural details and art works – aspect of addition of missing parts." Research and methodological works of the National Academy of Visual Arts and Architecture, no. 27 (February 27, 2019): 66–73. http://dx.doi.org/10.33838/naoma.27.2018.66-73.
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Architectural monuments of Lviv, buildings of its historical center are rich in details made of natural stone. When constructing buildings and performing architectural decoration, limestone was most often used. It is mild and easy to handle stone. In addition it’s an extremely decorative bright white stone, and the parts made from it are called white stone details. Often, architectural details and those that are part of architecture and those that are part of museum collections require restoration, as well as additions as part of restoration work. We will talk about the additions and the methodology of their implementation on the example of diploma works of the students of the Department of Architecture and Restoration of NU Lviv Polytechnic. Addition can be performed in different ways using different technologies. Here it is worth considering the restoration concept, which may be different. Additions can be made in such a way that they are not noticeable, but it can be so that at first sight it is clear which part of the detail is the original, which is an addition or reconstruction. The missing part can be add by way of execution of natural stone. Another method of stone architectural details addition is work with restoration stone masses. If we are talking about white stone architectural details, then the restoration mass is executed on the basis of limestone binder. The technique of working with the restoration masses is historical and traditional, known since the Renaissance. Today, restorers in their practice should be guided by state regulatory documents. The article gives examples of the architectural details addition with the restoration masses performed by the bachelors and masters of the Department of Architecture and Restoration of the Lviv Polytechnic National University. These examples illustrate the methods of working with the restoration mass and its capabilities in the performance of small, delicate, fine details and massive volumes. Its behavior when imitating the color and texture and the ability to work with the restoration mass in different conditions. The methodology described and illustrated in the article, has been tested and proved its capacity.
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Leidwanger, Justin. "New investigations of the 6th-c. A.D. “church wreck” at Marzamemi, Sicily." Journal of Roman Archaeology 31 (2018): 339–56. http://dx.doi.org/10.1017/s1047759418001368.
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The dense maritime material record off SE Sicily offers a vibrant testimony to millennia of cultural interaction between west and east, south and north (fig. 1). Pioneering underwater work by G. Kapitän from the late 1950s onward brought this corner of the Mediterranean Sea to scholarly attention through a series of remarkable shipwreck finds, including several massive stone cargoes at Marzamemi and Isola delle Correnti. Even among these rich finds, one site proved particularly intriguing and would become central to Kapitän's efforts: the “church wreck”, named for its assemblage of partially prefabricated marble and other stone elements intended to decorate the interior of a Christian basilica. First spotted by fishermen and reported to the local authorities, the site was preliminarily surveyed in 1960 by Kapitän in collaboration with P. N. Gargallo. Kapitän's investigations here unfolded intermittently over the following two decades, revealing a striking material assemblage and constructing a broad narrative around the “church wreck”.
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Lane, Jan Erik. "The Race of Mankind: Global Warming In the 21rst Century." Business and Management Horizons 4, no. 2 (June 29, 2016): 1. http://dx.doi.org/10.5296/bmh.v4i2.9677.
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The implementation process of the global accord on climate change has to start now in order to be implementable. The decentralized process if implementation should take the lessons from the theory of policy implementation into account (Pressman & Wildavsky, 1984; Wildavsky, 1987). The dependency upon various forms of coal (wood, stone) and fossil fuels is so large in the Third World that only massive financial assistance from the First World can mean a difference for the COP21 objectives. And many advanced countries (except Uruguay) also need to make great changes to comply with COP21.