Spindles Research Papers - Academia.edu (original) (raw)

Products resulted by small medium entreprises needed by consumers are oriented to a large number of design variations, competitive prices, and relatively fast manufacturing time. The CNC router 3-axes machine, locally produced to be tested, is a machine tool that works with 3 axes with functions for cutting, engraving and giving markings on hard flat materials. The purpose of this study is to provide analysis of the main spindle deviation of X-axis, Y-axis and Z-axis; and application of CNC router machines for granite granular materials for decoration purposes. The method used is an experimental research by conducting an experiment measuring the object of research to obtain measurement data and to be analyzed for the purposes of further action. It was found that deviation of the main spindle rotation is of 16.86% -47.35%, and axis movement deviation is ± 0.04 mm, which is above the permissible limit of <0.01 mm. The work that can be done with the CNC router 3-axes machine is the manufacture of creative products for decoration purposes, but it needs a lot of design variations and does not require high precision.

- by and +3
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- CNC Machine tools, CNC Machine tools programming, CNC Design, Spindles
- by Khairul Yuslizar
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- Gears, NUTS, Spindles, Torsion of Bars

This paper discusses the case study and comparison with productivity of component using traditional drilling machine to Multi spindle drilling machine. The growth of factors, one of the major factors being manufacturing efficiency with which the operation /activities are carried out in the organization. Productivity can be improved by reducing the total machining time, comb etc. There are frequent needs of tightening and loosening screws, drilling, tapping, boring and grinding operational machines. Huge and complicated designed parts cannot be machined in ordinary machines. In a single machine all the above specified operations can be carried out after drilling operation by removing of drill head and using the required tools like grinding, tapping can etc. By this we can achieve our industrial requirements and production targets. Here we are going to deve and tapping operations in single setup of work piece. In case of mass production where produce the job at a faster rate. This is not possible if we carry out the production by using general purpose machines. The best way to improve the production rate (produ machine. Usefulness and performance of the existing radial drilling machine will be increased by designing and manufacturing of multi spindle drilling head attachment. This is an open access article distributed under the terms of the Creative Commons Attribution License, Which Permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited This paper discusses the case study and comparison with productivity of component using traditional drilling machine to Multi spindle drilling machine. The growth of factors, one of the major factors being manufacturing efficiency with which the operation /activities are carried out in the organization. Productivity can be improved by reducing the total machining time, comb etc. There are frequent needs of tightening and loosening screws, drilling, tapping, boring and grinding operational machines. Huge and complicated designed parts cannot be machined in ordinary machines. In a single machine all ove specified operations can be carried out after drilling operation by removing of drill head and using the required tools like grinding, tapping can etc. By this we can achieve our industrial requirements and production targets. Here we are going to develop a single multi spindle drilling machine which can useful for drilling multiholes and tapping operations in single setup of work piece.

- by Dafna Langgut
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- Archaeology, Near Eastern Archaeology, Near Eastern Studies, Archaeobotany
- by Alexandr Mylashevskyi
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- Spindles, Przeworsk culture, The Cherniachov Culture, Kultura Wielbarska

- by Anil Rathour
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- Engineering, Multiculturalism, Development Studies, Design

Operation of industrial metallurgical plants is associated with significant wear in spindles, gearboxes and bearings where difficult to implement digital diagnostic tools due to harsh operating conditions. Angular and radial gaps produce extremely high dynamic loads and abrupt failures in the multi-stand hot rolling mills. Reliable vibration monitoring is very complicated due to inherent changes of technological regimes, treated material and drive speed. It appears more beneficial to monitor dynamic torques in addition to vibration signals, but this is restricted to the installation of strain gauges. The more acceptable approach is to monitor static torques of electric motors and, having identified multi-body models, to calculate remaining useful life (RUL) of elements. Based on this approach, the new monitoring system is developed for the multi-stand mill with integration into plant automation infrastructure. Parameters adaptation of nonlinear dynamical models is provided and technological loads optimization by the criterion of RUL in rolling stands. System supports a database of maintenance actions and elements failures. Reports are generated on overloading and RUL.

- by Pavlo Krot and +1
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- Prediction, Use Wear Analysis, Fatigue, Gears

- by Pavlo Krot
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- Prediction, Use Wear Analysis, Fatigue, Gears
- by Tore Nielsen
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- Neuroscience, Memory (Cognitive Psychology), Sleep Physiology, Sleep Medicine

BACKGROUND: A convergence of studies has revealed sleep spindles to be associated with sleep-related cognitive processing and even with fundamental waking state capacities such as intelligence. However, some spindle characteristics, such as propagation direction and delay, may play a decisive role but are only infrequently investigated because of technical difficulties.
NEW METHOD: A new methodology for assessing sleep spindle propagation over the human scalp using noninvasive electroencephalography (EEG) is described. This approach is based on the alignment of time-frequency representations of spindle activity across recording channels.
RESULTS: This first of a two-part series concentrates on framing theoretical considerations related to EEG spindle propagation and on detailing the methodology. A short example application is provided that illustrates the repeatability of results obtained with the new propagation measure in a sample of 32 night recordings. A more comprehensive experimental investigation is presented in part two of the series.
COMPARISON WITH EXISTING METHOD(S): Compared to existing methods, this approach is particularly well adapted for studying the propagation of sleep spindles because it estimates time delays rather than phase synchrony and it computes propagation properties for every individual spindle with windows adjusted to the specific spindle duration.
CONCLUSIONS: The proposed methodology is effective in tracking the propagation of spindles across the scalp and may thus help in elucidating the temporal aspects of sleep spindle dynamics, as well as other transient EEG and MEG events. A software implementation (the Spyndle Python package) is provided as open source software.

- by Christian O'Reilly
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- Neuroscience, Cognitive Science, Sleep Physiology, Electroencephalography

Spindles – one of the most common categories of finds in the burial monuments of the Early Iron Age in Verhneobskogo pool. In the
archaeological literature discussed in detail typological, cultural and chronological characteristics of the spindles. However, issues related
to their cultural and historical interpretation, remain controversial. So consider one of their devices to ignite the fire, other toys and
cult objects or instruments of weaving. Despite the presence of a number of articles devoted to the spindles of the Upper Ob questions of
typology and semantics are not considered. The most important problem in the study of spindles seems to us their historical and cultural
interpretation, and in particular the response to the question: "Why spindles are cultural and historical marker funeral monuments of the
Upper Ob Scythian time?". The works devoted to the funeral rites of the population of the Upper Ob in the Early Iron Age spindles considered
statistically, describes the context of their findings, but there is no reconstruction of ritual burial practices, according to which
the spindles fall into the burial. We believe that the role of the spindles in the funeral ritual, you can talk to three positions. The first
spindles as a professional marker buried. Secondly, spindles as an object of the funeral cult. And thirdly, spindles as an object of the
funeral ritual. It is known that the funeral ritual consisting of a set of autonomous ritual differing semantic unity and pursue a common
goal – to ensure the deceased a «correct» the transition from the field of life in the space of existence after death. Based on the foregoing,
it can be assumed that the spindles in the context of the funeral rites of the population of the Upper Ob Early Iron Age and to participate
in certain rites of passage unknown to us. For example, they can turn down an ornament or to participate in the ritual of the symbolic
cutting of the thread. Based on the above, we can come to a conclusion about the existence of a certain ritual mythoephic and Indo-
European concept (archetype) is closely associated with the spinning and funerary rituals.

- by Николай Головченко
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- Semantics, Spindles, Funeral Rites, the Early Iron Age

Spindle assembly requires the coordinated action of multiple cellular structures to nucleate and organize microtubules in a precise spatiotemporal manner. Among them, the contributions of centrosomes, chromosomes, and microtubules have been well studied, yet the involvement of membrane-bound organelles remains largely elusive. Here, we provide mechanistic evidence for a membrane-based, Golgi-derived microtubule assembly pathway in mitosis. Upon mitotic entry, the Golgi matrix protein GM130 interacts with importin α via a classical nuclear localization signal that recruits importin α to the Golgi membranes. Sequestration of importin α by GM130 liberates the spindle assembly factor TPX2, which activates Aurora-A kinase and stimulates local microtubule nucleation. Upon filament assembly, nascent microtubules are further captured by GM130, thus linking Golgi membranes to the spindle. Our results reveal an active role for the Golgi in regulating spindle formation to ensure faithful organelle inheritance

- by Jen-Hsuan Wei
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- Mitosis, Spindles, Microtubules, Golgi Apparatus
- by Tore Nielsen
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- Neuroscience, Sleep Physiology, Sleep Medicine, Cognitive Neuroscience

- by Игорь Приходько
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- Prediction, Use Wear Analysis, Fatigue, Gears
- by Elizaveta Krasnodubets
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- Textile Technology, Spinning, Spindles, Textile tools
- by Chiara Spinazzi-Lucchesi
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- Levantine Archaeology, Spindles, Textile tools, Tell Afis

In this study, we analyze the effect of a recliner chair with rocking motions on sleep quality of naps using automated sleep scoring and spindle detection models. The quality of sleep corresponding to the two rocking motions was measured quantitatively and qualitatively. For the quantitative evaluation, we conducted a sleep parameter analysis based on the results of the estimated sleep stages obtained on the brainwave and spindle estimation, and a sleep survey assessment from the participants was analyzed for the qualitative evaluation. The analysis showed that sleep in the recliner chair with rocking motions positively increased the duration of the spindles and deep sleep stage, resulting in improved sleep quality.

- by Suwhan Baek and +1
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- Sleep Physiology, Sleep Quality, Spindles, Sleep disorders

BACKGROUND:This communication is the second of a two-part series that describes and tests a new methodology for assessing the propagation of EEG sleep spindles. Whereas the first part describes the methodology in detail, this part proposes a thorough evaluation of the approach by applying it to a sample of laboratory sleep recordings.
NEW METHOD:The tested methodology is based on the alignment of time-frequency representations of spindle activity across recording channels and is used for assessing sleep spindle propagation over the human scalp using noninvasive EEG.
RESULTS: Spindle propagation displays features that suggest wave displacements of global synaptic potential fields. Propagation patterns that are coherent (as opposed to random), laterally symmetrical, and highly repeatable within and between subjects were observed. Propagation was slower from posterior to anterior and from central to lateral brain regions than in the opposite directions. Propagation speeds varied between 2.3 and 7.0m/s were obtained. A distinct grouping of propagation properties was noted for a small cluster of frontal electrodes. No propagation between distantly separated scalp locations was observed. The values of spindle characteristics such as average frequency, RMS amplitude, frequency slope, and duration, depend largely on propagation direction but are only mildly correlated with propagation delay.
COMPARISON WITH EXISTING METHOD(S): Results obtained are in line with many results published in the literature and offer new measures for describing sleep spindle behavior.
CONCLUSIONS: Propagation properties provide new information about sleep spindle behaviors and thus allow more precise automated assessments of spindle-related functions.

- by Christian O'Reilly
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- Neuroscience, Cognitive Science, Sleep Physiology, Electroencephalography