Complex Calculus Research Articles

HOLONIC MULTI-AGENT SYSTEMS ALGORITHM FOR AUGMENTED REALITY INTERACTIVE ASSISTANCE

In this paper is presented an algorithm based on the holonic multi-agent approach concerning augmented reality assistance to be applied in assembly or disassembly operations. The variation in production and fast start of production requires operators to learn assembly operations for large range of products. In order to avoid errors, operators might be trained and corrected using augmented reality application able to assist and provide important information to allow the operation according to technical required specification. The holonic multi-agent system allows solving complex calculus concerning the best choice. The proposed algorithm is easier to apply when the operator needs to be assisted in assembly operations while meeting technical specifications. By applying the proposed algorithm, the operators learn very fast the operations for assembly/disassembly.

Complex Calculus—Older Donors for Older Heart Transplant Recipients?

Complex Calculus—Older Donors for Older Heart Transplant Recipients?

AiMA - An AI-Based Mobile System to Assist College Students with Math-Related Issues

Introduction: As technology continues to progress, the importance and influence of mathematics in people's lives are growing. The emergence of mobile systems has brought about several benefits, such as portability, convenience, and accessibility, especially in the field of education. It is crucial to develop a mobile system that can cater not only to high school students but also to those enrolled in colleges and universities, offering solutions for basic calculations and highly specialized algorithms. To address this need, this research presents AiMA, an AI-based mobile system that assists college students with math-related issues. Methods: In this paper, we discuss the limitations of current math-solving mobile applications and propose a solution that caters to specialized algorithms for university students. AiMA employs React Native on the front-end side to render the user interface and Flask-server on the back-end side to handle numerical data. Additionally, an AI model is implemented to handle input images stored in a cloud-based media management platform for detection. Results: The system's functionality evaluation indicates that AiMA provides advantages over existing solutions by enabling users to solve complex calculus problems and receive tailored solutions for specific areas of mathematics. Conclusion: This makes AiMA a highly valuable tool for college and university students who require specialized assistance with their math-related studies.

Image Stitching Method of Bone Stick Fragment Based on Similarity Freeman Code Matching

A large number of bone stick fragments were unearthed at the Weiyang Palace, and the manual stitching method is inefficient and time-consuming, therefore Image Stitching Method of Bone Stick Fragment Based on Similarity Freeman code Matching is proposed by this paper to improve bone stick stitching efficiency. The Freeman code is used to represent the contour of the true color RGB image of bone stick fragments, and the direction change dense feature of the bone stick fragment fracture is fused with the Freeman code difference to represent the change direction feature to locate the fracture boundary. At the same time, the integer basic operation is used to replace the complex calculus calculation to improve the efficiency of the algorithm; The longest common subsequence algorithm is used to perform local similarity rough matching on Freeman code of the contour at the fragment fracture, and then the angle and distance error threshold is set according to the prior knowledge of manual stitching to reduce the matching error; Finally, according to the matching results, the complete bone stick contour binary image is drawn. Compared with other algorithms, the contour Cosine similarity accuracy of the bone stick image stitched by this algorithm is improved by 21.68%, which can be accurate to 97.80%; the Editing distance similarity accuracy is improved by 14.29%, which can be accurate to 91.87%;the Peak signal-to-noise ratio is improved by 83%, which can be accurate to 31.13%;the Structural Similarity is improved by 29%, which can be accurate to 0.87; the Figure of merit is improved by 39%, which can be accurate to 0.85. The experiment results show that the algorithm proposed in this paper can effectively assist the stitching work of bone stick cultural relics.

Improved Calculation Method for the Internal Force of h-Type Prestressed Anchor Cable Antislide Piles

An h-type prestressed anchor cable antislide pile is suggested for dealing with large-scale landslide disasters. At present, the internal force calculation of h-type antislide piles includes a great deal of cumbersome and complex calculus and graph multiplication processes, and the research on the action mechanism of prestressed anchor cables is insufficient. To simplify the calculation process, this study proposes an improved calculation method for the internal force and displacement of the h-type prestressed anchor cable antislide pile. A method to simplify the h-type antislide pile into a plane rigid frame calculation model is proposed, and the action of the anchor cable is added to the pile structure in the form of an unchanged tension. Then, the pile is divided into a loaded section and an anchorage section with the sliding surface as the boundary. Based on the engineering case, the results of internal force and displacement obtained through an improved calculation method, numerical simulation method, and graph multiplication method are compared and analyzed to verify the accuracy and applicability of the improved method. Finally, based on the improved calculation method, the internal force and displacement characteristics of piles are analyzed and compared under different support modes, including h-type pile, h-type with single-row anchor cable, and h-type with double-row anchor cables, and the support characteristics of the h-type prestressed anchor cable antislide pile are investigated. The results show that the tension of the anchor cable can effectively reduce the bending moment and displacement of piles. Compared with the h-type antislide pile, adding two prestressed anchor cables can reduce the maximum positive and negative bending moments of the front and rear piles by 14.8%, 14.5%, 9.4%, and 8.7%, respectively, and reduce the horizontal displacement of the top of the rear pile by 21.7%.

Nonlinear steady state vibrations of beams made of the fractional Zener material using an exponential version of the harmonic balance method

This paper presents the application of an exponential version of the harmonic balance method to the analysis of steady state vibration of geometrically nonlinear systems. A detailed description of the method and of the corresponding numerical procedure is provided. The von Karman theory is used to describe the effects of geometric nonlinearity. The material of the beams is modelled with the help of the Zener model using the fractional calculus. The problem is solved using an exponential version of the harmonic balance method. In the above-mentioned version, the complex calculus is used in contrast to the ordinary harmonic balance method, where the steady state vibrations are described with the help of the trigonometric functions. It significantly simplifies derivation of the amplitude equations. Moreover, the exponential version of the harmonic balance method is more elegant in comparison with the ordinary one. A detailed derivation of the amplitude equations is presented. The modified continuation method is proposed to solve the nonlinear amplitude equations and to determine the response curves. Moreover, the results of the exemplary calculation are presented and compared with known results in order to justify the efficiency and the correctness of the proposed approach.

Invisible, intangible, irrelevant, yet inevitable? Qualitative insights into consumer perceptions of heating tariffs and drop-in renewable gases in the German domestic heating market

One of the key challenges of increasing renewable energy use is consumer demand. In the residential heating sector, where long-lived fossil-fuel systems are slow to be replaced, consumer demand for drop-in renewable gases like biomethane or Synthetic Natural Gas could play an important role in short-term decarbonization. As this sector is a major emitter of CO2 in Europe, robust green demand could be key to fulfilling the targets set in the Paris Agreement. Yet existing research focuses on the supply side and technical aspects of renewable gases, leaving the demand side and consumer preferences for these gases largely neglected. To close this gap, we conducted a qualitative study based on two empirical strands: 22 interviews with heating consumers, and a set of interviews and focus groups with 27 industry experts. The study was situated in Germany, one of the world's largest biogas producers.Our results show that choosing a heating tariff is a low-involvement decision, but one made by a complex calculus where the environmental benefits of renewable gases count positively, but large-scale biogas production and perceived energy crop monocultures count negatively. SNG is still largely unknown and regarded neutrally. Industry experts evaluate voluntary markets for renewable gases as small, cost-driven and made up of consumers accustomed to low-cost products. Our insights on consumers who have the decision-making power over their heating tariffs can help policy makers support voluntary renewable energy markets and provide energy practitioners with approaches to increasing consumer engagement with their products.

Terminating Contracts for Convenience: Agency, Administrative Discretion, and Mutual Dependence

In the United States, governments retain the unilateral right to terminate contracts for convenience. This allows public organizations to end agreements with vendors when the government determines that it is in its best interest. The ability to terminate for convenience grants government agencies broad discretion over how to conclude contracts. For contracting officials, the decision to terminate for convenience involves a complex calculus about the relative importance of transaction costs, service quality, and vendor relationships. Contractors may be less interested in bidding on government contracts or may charge higher rates, knowing that their contract could be terminated any time. Using the lenses of administrative discretion and agency theory, this paper examines the delicate balance that administrators must navigate when assessing governmental priorities, individual motivations, and the pressures from contractor relationships. Analyzing data from the Federal Procurement Data System – Next Generation (FPDS-NG) on terminated federal professional service contracts from 2006 to 2018, we find that administrative discretion, contract management capacity, relationships, and political pressures influence how managers use terminations for convenience. When granted greater discretion, public managers are more likely to terminate contracts for cause or default, not for convenience, suggesting that professional standards may influence administrative decision-making.

Rigid ureteroscopy and holmium laser combined with high bile duct incision to treat complex hepatic calculus

Rigid ureteroscopy and holmium laser combined with high bile duct incision to treat complex hepatic calculus

Mothers’ Milk: How Gender and Immigration Obscure Agricultural Expertise and Care Work in Dairyland

AbstractGender is a key lens through which to understand industrial agricultural production in rural twenty‐first century communities. Here, I examine the gendered imaginaries of dairy production that perpetuate the meaning of “farmer” as masculine and white. The expertise of Mexican immigrant workers, and particularly that of women on spousal visas, challenges such assumptions and highlights the role of unremunerated labor in sustaining the industrial food chain. Everyday experiences of gender and race are shaped not only by local‐level assumptions but also by federal‐level immigration policies and employer recruitment practices that result in a mostly male immigrant agricultural workforce. In this article, I draw on interviews with rural Minnesota community members, as well as local and regional news coverage, to examine how gender and race intersect to marginalize the work and expertise of Mexican immigrants in the rural Midwest. In this case, Mexican immigrant mothers frame their labor as part of a complex calculus of immigration benefits and sacrifices.

Why Wake the Dead? Identity and De-extinction

I will entertain and reject three arguments which putatively establish that the individuals produced through de-extinction ought to be the same species as the extinct population. Forms of these arguments have appeared previously in restoration ecology. The first is the weakest, the conceptual argument, that de-extinction will not be de-extinction if it does not re-create an extinct species. This is misguided as de-extinction technology is not unified by its aim to re-create extinct species but in its use of the remnants of extinct populations as a resource. The second is the argument from authenticity; the populations produced by de-extinction technologies will be inauthentic if they are not of the extinct species and, therefore, will not be valuable. I argue authenticity is not required in conservation as the value of authenticity varies between people and cultures, and the novelty of de-extinct species will be equally desirable in many cases. The third argument is from retributive justice; we need the de-extinct population to have the same species identity as we owe a moral debt to the extinct population. I find the case for retributive justice unconvincing and argue that acting as if we have a duty to resurrect extinct species will result in a world with less species. Ultimately all the arguments that connect de-extinction technology to species identity fail, leaving us to consider a more complex calculus for the justification of de-extinction in conservation.

Responses to Concerning Posts on Social Media and Their Implications for Suicide Prevention Training for Military Veterans: Qualitative Study.

BackgroundA “concerning post” is a display of a user’s emotional crisis on a social media platform. A better understanding of concerning posts is relevant to suicide prevention, but little is known about social media users’ attitudes and responses to concerning posts. Military veterans in the United States are disproportionately affected by suicide, often use social media, and may have exposure to individuals with elevated suicide risk via concerning posts.ObjectiveThe objective of the study was (1) to obtain insight into whether and how US military veterans respond to members of their social network on social media (ie, “friends”) who are experiencing substantial emotional distress, and (2) to identify potential interventions that could assist in users’ response to concerning posts.MethodsWe recruited veterans through Facebook and conducted semistructured interviews with 30 participants between June and December 2017. We used a summary template for rapid analysis of each interview, followed by double-coding using a codebook based on topic domains from the interview guide. Members of the research team met regularly to discuss emerging patterns in the data, generate themes, and select representative quotes for inclusion in the manuscript.ResultsVeterans were reluctant to disclose emotional and health issues on Facebook, but they were open to reaching out to others’ concerning posts. There was a complex calculus underlying whether and how veterans responded to a concerning post, which involved considering (1) physical proximity to the person posting, (2) relationship closeness, (3) existing responses to the post, and (4) ability to maintain contact with the person. Veterans desired additional training, backed by community-based veteran organizations, in how to respond to concerning posts from peers.ConclusionsThere is a need to incorporate features that will help veterans effectively respond to concerning posts from peers into suicide prevention training and to expand access for veterans to such training.

Color index based thresholding method for background and foreground segmentation of plant images

In this paper, the color index based thresholding method for background and foreground segmentation of plant images is presented. The proposed method is implemented with color index approach, for this purpose two color indexes are modified to provide better information about the green color of the plants. Two fixed threshold methods are proposed for the color indexes to discriminate between foreground (green plant) and background (soil). Three versions of the proposed method are presented, these are applied in plant images with controlled conditions and crop images with real environmental conditions. Experimental results demonstrate that the proposed method outperforms other algorithms used as comparative in plant images obtaining a segmentation error of 6.62 ± 5.85% and a classification ratio of 1.93 ± 0.05. Also, the proposed method provides better segmentation results in comparison with other well-known state-of-art algorithms in different crop images. Finally, the proposed method does not require of complex calculus and their implementations are straightforward on any device.

Introduction to Special Issue: Trust in Doubt: Consuming in a Post-Truth World

Introduction to Special Issue: Trust in Doubt: Consuming in a Post-Truth World

Gender and Pain in Nineteenth-Century Cancer Care.

Gender and Pain in Nineteenth-Century Cancer Care.

Institutionalising a Withering Sense in Corporate Social Responsibility

Studies and writings on corporate social responsibility turned a full cycle with much ink spilled on this topic. From the inception of a divine origin, corporate social responsibility has now become a flamboyant display of numbers and statistics which corporations proudly present them to fulfil their legal obligations. It is ironic that a divine understanding of corporate social responsibility has now transpired to be a complex calculus of statistical tabulations, too often exhibited in annual and sustainability reports. Organisations become grossly mesmerised with the grandiosity of exceeding the prerequisites of ecological, environmental, social and economic performance supported by undisputable, verifiable and measurable data. Corporate social responsibility has become senseless and meaningless. This is not a research paper nor does it entail the rudiments of any research findings. Conversely, this paper alerts and perhaps cautions corporate social responsibility practitioners on the perils of their overarching emphasis on positivism. Corporate social responsibility cannot be quantified merely in numbers but on the contrary, it should involve truthful, honest and transparent dialectic communication with the stakeholders. Many corporations deceived and some still facing the remnants of their mistakes. The Volkswagen ‘diesel dupe’ crisis and Johnson & Johnson’s baby talc powder scandals are reminders of the same. This paper is a solemn reminder that corporations must be ‘awakened’ so that ethics is grounded to its core and not merely in the cosmetic forms of presentable statistics.

Personalized Risks of Over Diagnosis for Screen Detected Prostate Cancer Incorporating Patient Comorbidities: Estimation and Communication.

Shared patient-physician decision making regarding the treatment of prostate cancer detected by prostate specific antigen screening involves a complex calculus weighing cancer risk and patient life expectancy. We sought to quantify these competing risks using the probability that the cancer was over diagnosed, ie would not have been clinically diagnosed (diagnosed without screening) during the remaining lifetime of the patient. Using an established model of prostate cancer screening and clinical diagnosis we simulated screen detected cases and determined whether a modeled clinical diagnosis would occur before noncancer death. Time of noncancer death was based on comorbidity adjusted population lifetables. Logistic regression models were fitted to the simulated data and used to estimate over diagnosis probabilities given patient age, prostate specific antigen level, Gleason sum and comorbidity category. An online calculator was developed to communicate over diagnosis estimates. Face validity and ease of use were assessed by surveying 32 clinical experts. Estimated probabilities of over diagnosis ranged from 4% to 78% across clinicopathological variables and comorbidity status. When ignoring comorbidity, the estimated probability of over diagnosis in a 70-year-old man with prostate specific antigen 9.4 ng/ml and Gleason 6 was 34%. With severe comorbidities the estimate increased to 51%. Such a personalization may help inform the choice between active surveillance and definitive treatment. Based on responses from 20 of 32 experts we modified the explanation of over diagnosis for the online calculator and the input method for comorbid conditions. The probability of over diagnosis is strongly influenced by comorbidity status in addition to age. Personalized estimates incorporating comorbidity may contribute to shared decision making between patients and providers regarding personalized treatment selection.

Reply by Authors.

Purpose:Shared patient-physician decision making regarding the treatment of prostate cancer detected by prostate specific antigen screening involves a complex calculus weighing cancer risk and pati...

GeoGebraAs a Tool to Enhance Student Ability in Calculus

ThispaperdescribedtheuseofGeoGebrasoftwaretohelpstudentsinunderstanding Calculus material and its applications. GeoGebra is already used by more than 100 million students around the world. GeoGebra has the ability to minimize the difficulties of students who get Calculus subjects, especially students majoring in Natural Sciences and Engineering because this subject becomes a compulsory subject and a fundamental foundation in mathematics and its application across multidisciplinary fields such as medical, social sciences, psychology, and economics. Usually, the calculus course is given to first-year university students as the foundation for next course requirement. However, the manual calculation in Calculus sometimes takes a long time as it requires mathematics skills to solve the problem. Therefore, the advantagesofusingGeoGebraare(a)helpingtoconveytheCalculusconceptmaterial to be more interesting, especially for the delivery of material concepts of functions, limits, derivatives, and integrals, (b) providing a more realistic image, especially for more complex calculus material, and (c) providing a faster and accurate solution.

Introduction

Introduction