Woodworking marking tool structuration based on craft traditions

PurposeBased on profound information lacking in compiled information materials, the risks of losing knowledge related to the values of traditional woodworking processes are increasing. The purpose of this article is to collect and structure diverse marking tool data into a comprehensive, understandable and clear design schematic view, which serves as a basis for the accumulation and preservation of diverse marking objects and shows woodworking marking tool relation in the group and subgroup levels.Design/methodology/approachA method for marking tools structuring and analysis are described, including breaking down a set of objects into groups of marking objects, and assigning one or more attributes to the parcelled objects by arranging them into hierarchic levels. Research is based on marking tools used by carpenters, joiners and woodcarvers mainly in the Baltic region.FindingsCollected data, object analyses and comparison within-group and subgroup levels are based on written and visual sources, museum and museum funds visits, and participation in the local craftsmen events. The created structure is expandable in group and subgroup levels. The most comprehensive way for object structuring is chosen as a base to reveal a diversity of the objects.Originality/valueStructure schemes of woodworking marking tools are important in scientific, educative and cultural levels based on their wide range and use. Aggregated information of the woodworking tools serves as a base for existing tool studies and improvement, new tool and wood product creation as well as complements the structure of the upcoming woodworking hand tool database and book.

Movement-level process modeling of microsurgical bimanual and unimanual tasks

Purpose Microsurgical techniques require highly skilled manual handling of specialized surgical instruments. Surgical process models are central for objective evaluation of these skills, enabling data-driven solutions that can improve intraoperative efficiency. Method We built a surgical process model, defined at movement level in terms of elementary surgical actions ($$n=4$$ n = 4 ) and targets ($$n=4$$ n = 4 ). The model also included nonproductive movements, which enabled us to evaluate suturing efficiency and bi-manual dexterity. The elementary activities were used to investigate differences between novice ($$n=5$$ n = 5 ) and expert surgeons ($$n=5$$ n = 5 ) by comparing the cosine similarity of vector representations of a microsurgical suturing training task and its different segments. Results Based on our model, the experts were significantly more efficient than the novices at using their tools individually and simultaneously. At suture level, the experts were significantly more efficient at using their left hand tool, but the differences were not significant for the right hand tool. At the level of individual suture segments, the experts had on average 21.0 % higher suturing efficiency and 48.2 % higher bi-manual efficiency, and the results varied between segments. Similarity of the manual actions showed that expert and novice surgeons could be distinguished by their movement patterns. Conclusions The surgical process model allowed us to identify differences between novices’ and experts’ movements and to evaluate their uni- and bi-manual tool use efficiency. Analyzing surgical tasks in this manner could be used to evaluate surgical skill and help surgical trainees detect problems in their performance computationally.

Advancing Craft: A translation to modern tectonics

<p>Well-made joinery can be pricey, no matter if it is hand-crafted or prefabricated. This thesis attempts to understand all available tectonics used to fabricate joints and find a potential alternative to generate well-made joints in a more accessible manner. Specifically looking at traditional Japanese carpentry, Japanese joinery is a crucial precedent for examining due to its prestigious nature for withstanding the test of time and earthquakes. Here following the crafting of traditional joints is necessary to understand the hand-tool tectonic, allowing for an understanding to then iterate joints in the other tectonics with machine-tools and information-tools. Retrofitting provides for the opportunity for owners to add additional components to their existing properties. The standard residential home is commonly retrofitted by the owners to follow the ‘trend’ and ‘personalise’ their home. The want for retrofitting is usually due to the basic nature of cookie-cutter homes that are common to the New Zealand suburbs. By studying ways to construct joints, methods of fabricating joinery can assist the DIY culture in New Zealand, whether through prefabrication on the CNC router that is sold as kitsets or machine jigs that can be made onsite.</p>

Advancing Craft: A translation to modern tectonics

<p>Well-made joinery can be pricey, no matter if it is hand-crafted or prefabricated. This thesis attempts to understand all available tectonics used to fabricate joints and find a potential alternative to generate well-made joints in a more accessible manner. Specifically looking at traditional Japanese carpentry, Japanese joinery is a crucial precedent for examining due to its prestigious nature for withstanding the test of time and earthquakes. Here following the crafting of traditional joints is necessary to understand the hand-tool tectonic, allowing for an understanding to then iterate joints in the other tectonics with machine-tools and information-tools. Retrofitting provides for the opportunity for owners to add additional components to their existing properties. The standard residential home is commonly retrofitted by the owners to follow the ‘trend’ and ‘personalise’ their home. The want for retrofitting is usually due to the basic nature of cookie-cutter homes that are common to the New Zealand suburbs. By studying ways to construct joints, methods of fabricating joinery can assist the DIY culture in New Zealand, whether through prefabrication on the CNC router that is sold as kitsets or machine jigs that can be made onsite.</p>

Accessible, Open-source Hardware and Process Designs for 3D Bioprinting and Culturing Channels Lined with iPSC-derived Vascular Endothelial Cells

Indirect bioprinting for cell culture requires the use of several technologies and techniques which currently prevent many researchers not specialized in electrical engineering or materials science from accessing these new tools. In this paper, a printer and all necessary associated hardware was developed and tested for the purpose of seeding human induced Pluripotent Stem Cell (iPSC)-derived endothelial cells (iECs) onto all surfaces of a fibrin-gelatin channel. Immature iECs were seeded onto all channel surfaces and completed differentiation along channel walls. All required tools and methods, including engineering drawing, printable files, code, and hand-tool templates, have been provided with sufficient clarity to enable full, open-source replication of all technique employed.

Anthropometry of Tribal Farm Women to Improvise Hand Tool Designs for Bastar District of Chhattisgarh

Bastar district is a cultural heritage of Chhattisgarh and tribal dominated (66.3%) area. The population comprises of 42 tribes, the prominent tribes being Muria, Abhujmaria, Dandami, Gond, Maria, Dorla, Bhattra, Halba, Dhurwa, and Kawar. The economy of this region is primarily agriculture based, followed by forest-produces. Use of traditional tools like wooden mallet (khotla), indigenous plough and sickle are overwhelming while improved tools and equipment are negligible. Traditional equipment generates early fatigue, callus in hands, and drudgery for tribal women largely involved in farming. Anthropometric data of 100 tribal women between the age group of 18-45 years were measured. Statistically analysed data revealed that tribal women of Bastar had maximum stature of 1,870 mm and 1,400 mm as minimum with a mean of 1,523 mm. The standard deviation and CV were 80.6 mm and 5.29%, respectively. The maximum hand (right) pull strength for 5th and 95th percentile was 36.6 N and 117.6 N, respectively. Anthropometric data was utilized to improvise the design of khotla and indigenous plough. The maximum length of khotla handle was decided to be 2,105 mm, while that of minimum length was 1,620 mm. The total weight of khotla could be reduced by 23 per cent. Consequently, ΔHR reduced by 20-25 bpm from earlier value of 40 bpm. The weight of indigenous plough could also be reduced by 16% (3.8 kg) by shortening the length of the handle and the beam

Financial Orientated Heuristic Evaluation for Hand Tools 2021 HFES International Annual Meeting

The goal of purchasing hand tools is to improve financial outcomes for buyers. These financialgains can come from multiple aspects of hand tools, such as increased productivity, improved product quality, and decreased injury rate. Based on a literature review, current hand tool purchasingdecisions are frequently made by professionals without specialized scientific backgrounds; however, the hand tool selection methods they receive are solely based on ergonomic evaluations. Heuristic evaluation, created by Nielsen & Molich (1990), has been proven effective in discoveringusability issues quickly. Combined with the knowledge from hand tool evaluation literature andNielsen & Molich’s (1990) heuristic evaluation platform, two versions of financially orientatedhand tool heuristic evaluations were created: a buyer version and a seller version. The buyer versionhelps hand tool buyers make financially orientated purchasing decisions; the designer version helpsquickly assess the financial viability of the hand tool design under review.

How Impact the Design of Aluminum Swaging Circle Fitting on the Sealing for Piping Systems: Analytical and Numerical Model

Installation and repair of hydraulic installations are carried out by joining the pipes in the field. Pipe connections in aviation are made in a very narrow space and field. For this reason, fitting swaging method is used to connect the fittings to the pipes with a hydraulic hand tool. The basis for developing a swaging tool is knowledge of the design parameters for the plastic deformation of the swaging circle fitting. In addition to the design parameter, pipes have to be joined in cryogenic vacuum conditions, which require sealing in such sensitive and harsh conditions. In this study, the effect of swaged circle fitting designs on tightness and strength was determined and different swaging methods were examined for its improvement. Different geometric swaged circle fittings are designed and analytical and numerical models are solved. The solution results obtained show the characteristic effect of the fitting swaging analysis methodology and the swaged circle fitting design on the sealing of the pipe joint. The innovation is mainly the effect of the swaging circle connection design on the sealing of the pipe joint. With the finding in this work, it is now possible to develop or develop new tools for engineered swaging circle fitting.