580 research outputs found

    COVID-19 Preventive Behavior and Digital Media: A Bibliometric Study

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    COVID-19 preventive behavior is crucial for reducing the spread of COVID-19 infection. During the pandemic, digital media can be used to educate on the behavior. Therefore, it is imperative to study COVID-19 preventive behavior and digital media. Despite extensive examinations on this matter, a distinct lack of bibliometric exploration has been observed. This study involves a bibliometric analysis utilizing data obtained from the Scopus database. Following a comprehensive search and screening procedure, our research examined a total of 68 articles. The findings indicate that Liu, Romer, and Jamieson emerge as the most influential researchers in the realm of studies focused on COVID-19 preventive behavior and digital media. The US and China are observed as the most referenced countries for research on COVID-19 preventive behavior and digital media. The International Journal of Environmental Research and Public Health, PLoS ONE, and the Journal of Medical Internet Research stand out as the three most productive and referenced journals in studies relating to this research topic. Concerning the state of the art, fundamentally, existing research refers to five major topics: the influence of Protection Motivation Theory (PMT) factors, the influence of COVID-19 coverage (infodemiology), the influence of media exposure/information and Health Belief Model (HBM) factors, the influence of e-health literacy, knowledge, and attitude, and the role of digital media in public health intervention strategy to prevent the spread of COVID-19. In conclusion, this bibliometric study sheds light on the multifaceted landscape of COVID-19 preventive behavior and digital media research. By delving into researcher analyses, preferred publication outlets, and the topical state of the art, this study contributes a novel perspective to the existing literature

    Experimental investigation of relationship between trauma and bisphosphonate-related osteonecrosis

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    Background: Bisphosphonate (BP)-related osteonecrosis of the jaw (BRONJ) disease is rare, but there are serious side-effects of BP therapy in patients. In some patients, surgery is needed and could not be cured. Astandard test is not available showing the risk of jaw osteonecrosis in routine use. The measurement of serum C.terminal telopeptide (CTX) levels has been used in diseases of BRONJ resorption and antiresorptive therapy.Aim: This paper is aimed at investigating the relationship between  traumatic procedures and presence of BP-related osteonecrosis.Materials and Methods: Thirty male Wistar albino rats with weighing 200 } 20 g were used for the experimental procedures. Rats were randomly divided into three groups each containing 10 rats as follows: Group 1 (traumatic extraction group), Group 2 (atraumatic extraction group), and Group 3 (control group). All groups, zoledronic acid (ZA) (0.3  mg/kg/week)[1] was diluted with physiological saline and given  subcutaneously for 2 months. After the 2 months, Group 1 was subjected totraumatic extraction of right first lower molars, and Group 2 was subjected to atraumatic extractions of the right first lower molars. Group 3 was subjected to no extractions as a control group. Animals were euthanized 32 days after tooth extractions, and the ZA administration protocol was maintained until the animalsf death. After sacrifice, blood samples were collected for C-terminal cross.linking telopeptide of type I collagen (CTX.1) levels, clinical and radiological findings were recorded.Results: The bone resorption marker CTX-1 showed a significant difference among the groups. CTX-1 was measured significantly higher in blood samples of Group 2 (4.15 } 0.34; P = 0.001) than Group 1 (3.77 } 0.34; P = 0.0001). No, statistically significant changes were found between Groups 1 and 2 as for clinical and radiological assessment.Conclusion: This study provides preliminary observations for the  development of an animal model of BRONJ. Although clinical and  radiological findings were not relevant, serum CTX values are reliable biochemical markers for predicting BRONJ and also atraumatic surgical procedures are important to prevent BRONJ.Key words: Bisphosphonates, bone, osteonecrosis, prevention, serum C-terminal telopeptide leve

    Depletion forces near a soft surface

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    We investigate excluded-volume effects in a bidisperse colloidal suspension near a flexible interface. Inspired by a recent experiment by Dinsmore et al. (Phys. Rev, Lett. 80, 409 (1998)), we study the adsorption of a mesoscopic bead on the surface and show that depletion forces could in principle lead to particle encapsulation. We then consider the effect of surface fluctuations on the depletion potential itself and construct the density profile of a polymer solution near a soft interface. Surprisingly we find that the chains accumulate at the wall, whereas the density displays a deficit of particles at distances larger than the surface roughness. This non-monotonic behavior demonstrates that surface fluctuations can have major repercusions on the properties of a colloidal solution. On average, the additional contribution to the Gibbs adsorbance is negative. The amplitude of the depletion potential between a mesoscopic bead and the surface increases accordingly.Comment: 10 pages, 5 figure

    Long-Term Memorability On Advertisements

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    Marketers spend billions of dollars on advertisements but to what end? At the purchase time, if customers cannot recognize a brand for which they saw an ad, the money spent on the ad is essentially wasted. Despite its importance in marketing, until now, there has been no study on the memorability of ads in the ML literature. Most studies have been conducted on short-term recall (<5 mins) on specific content types like object and action videos. On the other hand, the advertising industry only cares about long-term memorability (a few hours or longer), and advertisements are almost always highly multimodal, depicting a story through its different modalities (text, images, and videos). With this motivation, we conduct the first large scale memorability study consisting of 1203 participants and 2205 ads covering 276 brands. Running statistical tests over different participant subpopulations and ad-types, we find many interesting insights into what makes an ad memorable - both content and human factors. For example, we find that brands which use commercials with fast moving scenes are more memorable than those with slower scenes (p=8e-10) and that people who use ad-blockers remember lower number of ads than those who don't (p=5e-3). Further, with the motivation of simulating the memorability of marketing materials for a particular audience, ultimately helping create one, we present a novel model, Sharingan, trained to leverage real-world knowledge of LLMs and visual knowledge of visual encoders to predict the memorability of a content. We test our model on all the prominent memorability datasets in literature (both images and videos) and achieve state of the art across all of them. We conduct extensive ablation studies across memory types, modality, brand, and architectural choices to find insights into what drives memory

    Hierarchical Survivable Network Design Problems

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    We address the problem of designing two-level networks protected against single edge failures. A set of nodes must be partitioned into terminals and hubs, hubs must be connected through a backbone network, and terminals must be assigned to hubs and connected to them through access networks, being the objective to minimize the total cost. We consider two survivable structures, two-edge connected (2EC) networks and rings, in both levels of the network. We present an integer programming formulation for these problems, solve them using a branch-and-cut algorithm, and show some computational results. © 2016 Elsevier B.V

    The ring/κ-rings network design problem: Model and branch-and-cut algorithm

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    This article considers the problem of designing a two-level network where the upper level consists of a backbone ring network connecting the so-called hub nodes, and the lower level is formed by access ring networks that connect the non-hub nodes to the hub nodes. There is a fixed cost for each type of link, and a facility opening cost associated to each hub. The number of nodes in each access ring is bounded, and the number of access rings connected to a hub is limited to κ, thus resulting in a ring/κ-rings topology. The aim is to decide the hubs to open and to design the backbone and access rings to minimize the installation cost. We propose a mathematical model, give valid inequalities, and describe a branch-and-cut algorithm to solve the problem. Computational results show the algorithm is able to find optimal solutions on instances involving up to 40 nodes within a reasonable time. © 2016 Wiley Periodicals, Inc. NETWORKS, Vol. 68(2), 130–140 2016. © 2016 Wiley Periodicals, Inc

    A branch-and-cut algorithm for the hub location and routing problem

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    We study the hub location and routing problem where we decide on the location of hubs, the allocation of nodes to hubs, and the routing among the nodes allocated to the same hubs, with the aim of minimizing the total transportation cost. Each hub has one vehicle that visits all the nodes assigned to it on a cycle. We propose a mixed integer programming formulation for this problem and strengthen it with valid inequalities. We devise separation routines for these inequalities and develop a branch-and-cut algorithm which is tested on CAB and AP instances from the literature. The results show that the formulation is strong and the branch-and-cut algorithm is able to solve instances with up to 50 nodes. © 2014 Elsevier Ltd

    Dynamic Collection Scheduling Using Remote Asset Monitoring: Case Study in the UK Charity Sector

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    Remote sensing technology is now coming onto the market in the waste collection sector. This technology allows waste and recycling receptacles to report their fill levels at regular intervals. This reporting enables collection schedules to be optimized dynamically to meet true servicing needs in a better way and so reduce transport costs and ensure that visits to clients are made in a timely fashion. This paper describes a real-life logistics problem faced by a leading UK charity that services its textile and book donation banks and its high street stores by using a common fleet of vehicles with various carrying capacities. Use of a common fleet gives rise to a vehicle routing problem in which visits to stores are on fixed days of the week with time window constraints and visits to banks (fitted with remote fill-monitoring technology) are made in a timely fashion so that the banks do not become full before collection. A tabu search algorithm was developed to provide vehicle routes for the next day of operation on the basis of the maximization of profit. A longer look-ahead period was not considered because donation rates to banks are highly variable. The algorithm included parameters that specified the minimum fill level (e.g., 50%) required to allow a visit to a bank and a penalty function used to encourage visits to banks that are becoming full. The results showed that the algorithm significantly reduced visits to banks and increased profit by up to 2.4%, with the best performance obtained when the donation rates were more variable

    Erkek köpeklerde intratestiküler gliserol ve etanol uygulamalarının kısırlaştırma üzerine etkilerinin karşılaştırılması (Comporation of the Effects of Intratesticular Glycerol and Ethanol Injections on Sterilization of Male Dogs)

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    This study was conducted to investigate the effects of intratesticular glycerol and ethanol injection on sterilization. Twelve mature male dogs were used. They were allocated randomly to two equal groups called glycerol and ethanol and one ml glycerol (70%) and ethanol (95%) was injected intratesticularly. The animals were observed during two months. The blood and sperm samples obtained once a week in all groups were examined regarding to serum testosterone level and spermatozoon concentration and motility rate. There was a fistula formation and scrotal wounds resulting from orchitis in all glycerol and two ethanol group dogs after the 5th day of injection. The fistular openings closed spontaneously in all cases in due course. After the 2nd month, testicular atrophy was seen to occur. It was determined the presence of marked decreases (p<0.01) in both groups spermatozoon concentration and motility as well as in the level of serum testosterone two weeks after drug injection. The histopathologic examination conducted after the 2nd month revealed degeneration, necrosis and diffuse connective tissue proliferation in the seminiferus contortus tubulus of both groups. It has been concluded that glycerol and ethanol can be effective for sterilization in male dogs
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