scholarly journals Biomechanical analysis of the right elevated glenohumeral joint in violinists during legato-playing

2021 ◽  
pp. 1-10
Author(s):  
Anne-Sophie Saffert ◽  
Maximilian Melzner ◽  
Sebastian Dendorfer

BACKGROUND: Many statistics reveal that violin players suffer most often from musculoskeletal disorders compared to musicians of other instrument groups. A common phenomenon, especially observed in violin beginners, is the tendency to elevate the right shoulder during playing the violin. This can probably lead to serious disorders in long-term practice with repetitive movements. OBJECTIVE: For this reason, this study investigated the relationship between the right shoulder elevation and the force in the right glenohumeral joint during violin playing. It was hypothesized that the forces in the right glenohumeral joint are higher during playing with the right shoulder raised compared to playing in normal posture. METHODS: Motion capture data from four experienced violinists was recorded and processed by means of musculoskeletal simulation to get the force and elevation angle while playing with raised shoulder and in normal position. RESULTS: The results indicate that the absolute values of the resulting force, as well as the forces in the mediolateral, inferosuperior, and anteroposterior directions, are higher in playing the violin with the shoulder raised than in a normal posture. CONCLUSIONS: Elevating the right shoulder while playing the violin may pose a potential problem.

2021 ◽  
Vol 13 (6) ◽  
pp. 71
Author(s):  
Marco A. Paganini

In the present paper, I have modelled the Degree of Operating Leverage (DOL) and the Degree of Financial Leverage (DFL) using the percentage variations of the economic quantities. I devoted a great effort to encompass the investment dynamic and its financing mix to design a robust model implementable in a business context. The relationship discovered between DOL and DFL is complex and manifold: first, it appears asymmetrical because DOL can influence DFL, but the former is unrelated to the latter. Second, there is an infra-annual relationship measurable through partial derivatives. Finally, the stress tests shed light on some long-term impacts of one-off shocks even when the steady-state conditions are restored, disclosing an inter-annual relationship. The DOL-DFL nexus appears to be negatively related, but I also discovered positive relations and unrelated conditions. As argued in the economic literature, they cannot always behave as substitutes. The mathematical DOL-DFL model developed can admit positive, negative, and unrelated relations even though management might intervene to choose the right combination. Also, the Business Case shows positive and negative relationships, both at the infra-annual and inter-annual levels. The DOL-DFL nexus depends on circumstances and management decisions. Empirical evidence should find how management uses such a nexus and how effective such decisions have been over time.


Author(s):  
Omar Mohamed Raouf Mohamed Ahmed Elsaka ◽  
Omar Elsaka

Background: Percutaneous balloon mitral valvuloplasty is a procedure used to dilate the mitral valve in cases of rheumatic mitral stenosis. The catheter is inserted into the female vein to the right atrium and atrial septum. The mitral valve is then passed through the inflated balloon to facilitate effective integration of mitral adhesions, which increases the area of the mitral valve and decreases the rate of mitral stenosis. Mitral regurgitation is a potential problem, and thus balloon percutaneous mitral valvuloplasty (PBMV) is prevented in moderate to severe relapse. The Wilkins score studies mitral valve morphology and evaluation by echocardiography to assess the viability of PBMVs based on specific echocardiographic conditions. Conclusion: There are many factors in the immediate and long-term outcomes of patients undergoing PMV. Echo-Sc can be used in combination with other clinical and morphological predictions of PMV effects to identify patients who experience the best effects on PMV.


Author(s):  
Gurpreet S. Dhillon ◽  
Trevor T. Moores ◽  
Ray Hackney

We present a potential misalignment that many emerging economies may face with respect to the advent of networked organizations. We argue that although it may seem that networked organizations appear to offer a viable option for the progress of a nation, a deeper analysis suggests otherwise. This will be exemplified through the case of The Engineering Corporation and its presence in India. While The Engineering Corporation does indeed provide employment to the local economy, the host country must determine the right mix of the aspects involved in the collaborative venture. If this care is not taken, there will be little benefit for the host country, thus resulting in a skewed orientation in the relationship. The globalization of work supported by telecommunications technology and the advent of “networked” organizations has produced a potential dilemma in how to balance the interests of the new global company and the long-term national interests of the country supplying the workforce. A networked organization is one that is decentralized and has regional offices that deal with part of the business operation. For instance, an IT center in one location and a sales office in another. Global decentralization is motivated primarily in order to exploit cheap, skilled labor wheresoever it is found in the world.


1997 ◽  
Vol 273 (5) ◽  
pp. C1714-C1720 ◽  
Author(s):  
Maria Gomez ◽  
Karl Swärd

Longitudinal smooth muscle strips from guinea pig ileum were cultured in vitro for 5 days, and the relationship between extracellular Ca2+ and force in high-K+ medium was evaluated. In strips cultured with 10% fetal calf serum (FCS), this relationship was shifted to the right (50% effective concentration changed by 2–3 mM) compared with strips cultured without FCS. The shift was prevented by inclusion of verapamil (1 μM) during culture and mimicked by ionomycin in the absence of FCS. The intracellular Ca2+ concentration ([Ca2+]i) during stimulation with high-K+solution or carbachol was reduced after culture with FCS, whereas the [Ca2+]i-force relationship was unaffected. Cells were isolated from cultured strips, and whole cell voltage-clamp experiments were performed. Maximum inward Ca2+ current (10 mM Ba2+), normalized to cell capacitance, was almost three times smaller in cells isolated from strips cultured with FCS. Culture with 1 μM verapamil prevented this reduction. These results suggest that increased [Ca2+]iduring culture downregulates Ca2+current density, with associated effects on contractility.


2021 ◽  
Vol 9 (5) ◽  
pp. 232596712110077
Author(s):  
Matthew J.J. Anderson ◽  
Christina D. Mack ◽  
Mackenzie M. Herzog ◽  
William N. Levine

Background: Shoulder instability is a common and potentially debilitating injury among collision sport athletes that can lead to long-term damage of the glenohumeral joint. Limited data exist regarding instability among elite athletes in the National Football League (NFL). Purpose: To describe the epidemiology of shoulder instability in the NFL from 2012 through 2017. Study Design: Descriptive epidemiology study. Methods: The NFL’s injury database was reviewed for shoulder instability injuries resulting in missed time during the study inclusion dates. Injuries were classified by type and direction, as well as timing, setting, and mechanism. Median missed time was determined for the different types and directions of instability. Incidence rates for game-related injuries were calculated based on timing during the season and player position. Finally, the relationship between player position and instability direction was assessed. Results: During the 6-year study period, 355 players sustained 403 missed-time shoulder instability injuries. Most injuries occurred during games (65%) via a contact mechanism (85%). The overall incidence rate of game-related instability was 3.6 injuries per 100,000 player-plays and was highest during the preseason (4.9 per 100,000 player-plays). The defensive secondary position accounted for the most injuries, but quarterbacks had the highest incidence rate in games (5.5 per 100,000 player-plays). Excluding unspecified events (n = 128; 32%), 70% (n = 192) of injuries were subluxations and 30% (n = 83) were dislocations; 75% of dislocations were anterior, while subluxations were more evenly distributed between the anterior and posterior directions (45% vs 52%, respectively). Players missed substantially more time after dislocation compared with subluxation (median, 47 days vs 13 days, respectively). When instability direction was known, the majority of instability events among quarterbacks and offensive linemen were posterior (73% and 53%, respectively), while anterior instability was most common for all other positions. Conclusion: Shoulder instability is a common injury in the NFL and can result in considerable missed time. Dislocations occur less frequently than subluxations but lead to greater time lost. While most dislocations are anterior, more than half of subluxations are posterior, which is likely the result of repetitive microtrauma to the posterior capsulolabral complex sustained during sport-specific motions such as blocking. The risk of instability varies by player position, and position may also influence instability direction.


2018 ◽  
Vol 8 (2) ◽  
pp. 199-211
Author(s):  
Ifan Rizky Kurniyanto ◽  
Bayu Krisnamurthi

Capital markets allows the plantation companies to obtain long-term sources of funding for business expansion. To Invest in the stock market investors require careful consideration of accurate information to determine the relationship of variables that cause the fluctuation of the company's stock price to be purchased. Knowing the influence of these variables, investors can choose a strategy to determine the right company as a place to invest. The purpose of this study is to analyze technically and fundamentally shares of plantation companies that have been listed on the BEI in period of 2008-2016. Research method using panel data and Ipot Ultima. The results of this study showed that through fundamental analysis it is known that ROA, Inflation, Exchange Rate, and BI Rate and AR1 have a significant influence (Pvalue <0.05) on stock prices while CR, DER, TOTA, PER, NPM have no significant effect on stock price plantation. Through technical analysis it is known that the movement of plantation company in MA 3025 is sideway.


2019 ◽  
Vol 3 (Supplement_1) ◽  
pp. S597-S597
Author(s):  
Janice D Crist ◽  
Cheryl Lacasse ◽  
Linda R Phillips ◽  
Jian Liu

Abstract Caregiving families often experience “tipping points,” changes that forever alter their lives, such as a fall with a fractured femur. Tipping points for older adults can be conceptualized as an interaction between individuals and their environments. According to Lawton’s theory of person-environment fit (Lawton, 1983, 1985), physical and social environments and the person’s behavior are shaped by one another in a dynamic, ever-changing process. For older adults, the relationship between “environmental press,” or the mismatch between the person and his/her environment, and adaptation to that environment is mediated through one’s ability to cope. When stressors in health, cognition, or caregiver availability occur, environmental press may heighten, leading to a tipping point. In this paper the authors clarify how environmental press theory provides a foundation for studying early detection of impending tipping points and facilitating decisional support of families for choosing the right long-term support services at the right time.


2019 ◽  
Vol 19 (2) ◽  
pp. 225-241 ◽  
Author(s):  
Vikki McCall ◽  
Madhu Satsangi ◽  
Corinne Greasley-Adams

This article explores older owner occupiers in lower value properties who, having acquired their home through the Right to Buy (RTB) in the 1980s, are now experiencing housing-related challenges in older age. This article outlines the views and perceptions of older owner occupiers, social landlords, voluntary groups and housing organisations to explore the legacy of the RTB. Current and future policy challenges in the area include the differentiation of home owners, difficulties of selling property with low equity in older age and the relationship between health and housing. This article calls to widen the analysis of the long-term impact of the RTB to owner occupiers in lower value properties and notes that ‘ageing in place’ goes beyond looking at people’s current house to the linked housing choices available to them. We recommend that policy support be extended to older home owners to increase housing choice in older age.


2021 ◽  
Vol 29 (2) ◽  
pp. 173-183
Author(s):  
Suwinto Johan ◽  
Ariawan Ariawan

The relationship between financial institutions and customers is like two sides of a coin. On one hand, it is mutually beneficial, but on the other hand, this relationship can lead to mutual harm. Customers of financial institutions have a medium for a long-term relationships. Consumers of financial institutions generally have an average relationship of 24 months. Consumers make loan payments according to the agreed time. Customers will be able to get the right to the collateral if the loan has been paid. Conversely, if customers are unable to pay the installments on time, financial institutions will repose the collateral. From the inception of the loan to the repayment of the loan, the relationship between customers and financial institutions experiences several conditions. This research uses a normative judicial method, aiming to analyze consumer protection of non-bank financial institutions based on the existing laws and regulations. This research will focus on consumer protection from the start of the standard agreement, the fees or expenses charged, to the loan repayment mechanism. This research concludes that the protection of consumers of non-bank finance companies, especially finance companies, is still very weak. Consumer protection for finance companies, especially non-banks, has not been fully accommodated in the existing Consumer Protection Law. Therefore, the authority needs to issue a regulation in protecting the consumer in the financial industry.


2015 ◽  
Vol 28 (2) ◽  
pp. 237-258 ◽  
Author(s):  
Isabelle Arpin ◽  
Céline Granjou

ArgumentTemporal issues appear to be crucial to the relationship between life scientists and their field sites and to the making of science in the field. We elaborate on the notion of practices of time to describe the ways life scientists cope with multiple and potentially conflicting temporal aspects that influence how they become engaged and remain engaged in a field-site, such as pleasure, long-term security, scientific productivity, and timeliness. With this notion, we seek to bring enhanced visibility and coherence to the extensive but rather scattered and limited treatments of temporal practices in field sciences that already exist.


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