140,900 research outputs found
The Tahlequah Leader
No full textWeekly newspaper published in Tahlequah, Indian Territory that includes local, territorial, and national news, along with advertising
Correction to: Ceftaroline Fosamil for Treatment of Pediatric Complicated Skin and Soft Tissue Infections and Community-Acquired Pneumonia (Pediatric Drugs, (2021), 23, 6, (549-563), 10.1007/s40272-021-00468-w)
No full textThe article “Ceftaroline Fosamil for Treatment of Pediatric Complicated Skin and Soft Tissue Infections and Community-Acquired Pneumonia”, written by Susanna Esposito,Timothy J, Carrothers ,Todd Riccobene , Gregory G. Stone and Michal Kantecki was originally published electronically on the publisher’s internet portal on 31st August 2021 without open access. With the author(s)’ decision to opt for Open Choice the copyright of the article changed on 20th September 2021 to © The Author(s) 2021 and the article is forthwith distributed under a Creative Commons Attribution-Noncommercial 4.0 International License, which permits any non-commercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc/4.0/. The original article has been corrected
Archeometric Investigation of the Stone Tools of the Vatya Culture (Pest County, Hungary)
No full textWith the analysis of the middle Bronze Age (2000–1350 BC) Vatya culture findings in Pest county (Central Hungary) comprising of more than 400 polished stone tools and instrument tools this is the first archaeometric study with such scale in Hungary. In order to characterize petrographically the raw-material of the stone tools macroscopic and microscopic stone analyses were made together with mineralogical and geochemical analyses. In the course of the work a new digital database the Archaeometric Stone Tool Database was established. Based on the results, the material of the instrument stones is mainly sandstone and quartzite that were easy to collect from their source areas. Local volcanics, mostly amphibole containing andesite variations dominated among the material of the polished stone tools. Ophiolites (metamorphic basic rocks, serpentinized basic and ultrabasic rocks) were the raw-material of stone axes that indicate either more distant travels for raw-material or exchange import
Importance of testing capillary water absorption of stone
No full textU radu su prikazani rezultati određivanja kapilarne vodoupojnosti
na uzorcima prirodnog kamena izraženi u g/m2 površine
kamena u odnosu na kvadratni korijen vremena izražen u s0,5 ili
u g/m2 površine kamena u odnosu na vrijeme u minutama.
Ispitivanje je obavljeno metodom opisanom u normi koja je
prihvaćena na razini Europske zajednice i danas je važeća u
Hrvatskoj (norma HRN EN 1925:1999). Dobiveni i prikazani
rezultati mogli bi biti korisni pri ugradnji prirodnog kamena.
Posebice se to odnosi na moguću orijentaciju kamenih elemenata
prilikom ugradnje u vlažnim uvjetima.The research presents results of water absorption determination of natural stone samples by capillarity.
Two Croatian natural stone carbonate varieties were analysed for this paper, Kanfanar from quarry in Istria and Seget from quarry near Trogir. Natural stone Kanfanar (Istrian Yellow) is tawny colour limestone petrographically defined as stylolitised oncoid floatstone.
Natural stone Seget is limestone from homogenous to microbeded structure with visible pores, white to yellow in colour. In some parts it has stripes in bluish tone consist of bioclasts.
Analysed samples of domestic (Croatian) natural stone varieties show considerable differences in water absorption (expressed in g/m2) showed as a function of square root of time expressed in seconds (s0,5) or as a function of elapsed time in minutes.
Testing was performed by method specified in European standard EN 1925:1999 accepted in European Union and in Croatia. Gained results shown in this article could be very useful during in-building, especially concerning the various orientations of stone elements in different stone construction. That could decrease the negative influence of different factors during the stone decay especially in wet conditions
Tacit knowledge, learning and expertise in dry stone walling
No full textThis is a detailed study of learning in the context of dry stone walling. It examines
what happens in the learning situation. The aim of this work was:
'To understand the nature of expertise in dry stone walling, how it is understood
by those practising the craft, and how it is transmitted to others'.
The main research questions were, therefore:
What happens when dry stone wallers are learning their craft?
How do they acquire expertise in dry stone walling?
How is this learning communicated?
This process necessitated developing a way of engaging with the practitioners,
eliciting descriptive data about what they were doing, and why they were doing it,
through interviews (or conversations) with both individuals and groups, whilst
they practiced their skill. Twenty three wailers were interviewed as they worked,
building walls.
The material obtained was analysed under seven different themes:
'Knowing how'
The use of tacit knowledge or intuition
'Flow'
Constant decision making, reflection and learning from mistakes
Individual and subjective variations and experiences
The relevance of emotion
The use of 'rules of thumb' or maxims.
Learning walling does not fit simply into any of the seven themes. It is
contextualised, complex and individual. It demonstrates tacit knowledge and
intuition. It involves emotion, sometimes consciously, sometimes not. It involves
memory, problem solving, and learning from mistakes, and reflection. Maxims or
'rules of thumb' were a key element in the learning process at all stages. Linear
stages of learning were not evidenced. Deep understanding of the practice is
evidenced, and the wider learning and teaching implications are explored
G. Bennet Larson with Ezra Stone (Miss Greater Philadelphia, ) and Henry Addage.
No full textPhoto shows G. Bennet Larson and Ezra Stone with "Miss Greater Philadelphia" at a beauty pageant, probably in Philadelphia, Pennsylvania
An engineering perspective on the Industrial Archaeology of the Purbeck Stone Industry
No full textThis thesis is a study of the industrial archaeology of the Purbeck Stone Industry, set within the context of local social and economic history and informed especially by
an engineering perspective on the quarrying and mining operations. A wide range of existing published sources and archive evidence has been evaluated, placing the work in the context of existing knowledge, and an extensive field survey of stone extraction and related industrial sites in the Purbeck area has been undertaken,including the creation of a large photographic archive. Major buildings in which
Purbeck stone has been used as a constructional material have also been examined to illustrate the market for the material at various historical periods and to show
how the various types of stone were able to be used, and the relationship of potential use to methods of extraction and working. The study examines all aspects of the extraction and working of the stone in Purbeck, illustrating how masons quarried, dressed and carved the stone before it was transported to its major markets, and examines the techniques of quarrying, mining, working, carving and transporting the stone providing a much improved understanding of this neglected area of the industry. In addition, the effect of the industry on the local community is examined, and the roles of the craft guild, landowners and stone merchants evaluated and explained. The importance of transport is also stressed, and the changing technical approaches to the movement of this heavy raw material are considered. Finally the thesis explores some important aspects of twentieth century stone
production, noting the importance of changes in planning laws, apprentice training and stone conservation and how these relate to the future prospects for the industry
The application of hydroxyapatite-based treatments to salt-bearing porous limestones: A study on sodium sulphate-contaminated Lecce Stone
No full textSalt weathering is among the most severe phenomena affecting porous limestone, often leading to the loss of precious material from historical sculptures and building façades. Together with exerting a weathering action, salts can also hamper the success of consolidation treatments, by interfering with consolidants’ penetration and/or curing reactions. On site, application of consolidants on non-contaminated stone is rarely feasible, especially in the case of porous limestones; for this reason, testing application of consolidants on salt laden stone is of particular relevance to guarantee their successful application in the field.
In this paper, two hydroxyapatite (HAP)-based treatments have been applied to Lecce Stone, a very porous organogenic limestone, highly susceptible to salt weathering. The two treatments differ for DAP concentration, application procedure and presence/absence of ethanol in the formulation. Prior to treating, specimens were subjected to salt crystallization cycles in a sodium sulphate solution, to cause salt contamination and induce weathering. They were then desalinated, purposely leaving a percentage of salts in the stone (SO42- after desalination ~0.15-0.3 wt%). Phase formation and distribution as a result of different contamination levels were investigated, and the efficacy of the treatments in comparison to ethyl silicate was determined, as it is currently the most used consolidant for this lithotype. Finally, the durability of the most promising treatment to further salt crystallization was evaluated, again in comparison with ethyl silicate.
Promising results were obtained, as the presence of sodium sulphate did not prevent the HAP- based consolidants from uniformly distributing in the stone, sealing cracks and forming insoluble phosphate phases. Interestingly, the application on non-desalinated stone revealed that the nature and the amount of the phases that form as a result of the treatment are dependent on the amount of salts in the stone. Finally, most promising HAP-based formulation was found to enhance the stone’s durability towards further salt crystallization, also compared to ethyl silicate
Jonathan Stone surveyors field notes - G
No full textJonathan Stone, a native of Rutland, Massachusetts, and a veteran of the American Revolution, owned two shares in the Ohio Company of Associates. He settled with his family in Belpre, Ohio, in 1790. The family later moved to the Rainbow allotment in this Donation Lands, 1 100,000-acre gift from the federal government to encourage settlement north of the Ohio Company's purchase. This notebook covers surveys in parts of federal survey ranges 11, 12, and 13
Excavations at the Harappan Flint Quarry 862 on the Rohri Hills (sindh, Pakistan)
No full textDer Anschnitt, 19. Stone Age - Mining Age a cura di G. Koerlin e G. Weisgerbe
- …
