An interaction-oriented multi-agent SIR model to assess the spread of SARS-CoV-2

It is important to recognize that the dynamics of each country are different. Therefore, the SARS-CoV-2 (COVID-19) pandemic necessitates each country to act locally, but keep thinking globally. Governments have a responsibility to manage their limited resources optimally while struggling with this pandemic. Managing the trade-offs regarding these dynamics requires some sophisticated models. "Agent-based simulation" is a powerful tool to create such kind of models. Correspondingly, this study addresses the spread of COVID-19 employing an interaction-oriented multi-agent SIR (Susceptible Infected-Recovered) model. This model is based on the scale-free networks (incorporating 10,000 nodes) and it runs some experimental scenarios to analyze the main effects and the interactions of "average-node-degree", "initial-outbreak-size", "spread-chance", "recovery-chance", and "gain-resistance" factors on "average-duration (of the pandemic last)", "average-percentage of infected", "maximum-percentage of infected", and "the expected peak-time". Obtained results from this work can assist determining the correct tactical responses of partial lockdown

Improvement of manufacturing productivity and responsiveness through integrated process planning and authorizing

Autoriziranje se može opisati kao signal u okviru sustava koji određuje može li neki posao započeti ili ne. Dok se u push sustavima započimanje poslova programira, u pull sustavima oni se autoriziraju budući da se proizvodni sustavi pull tipa upravljaju downstream informacijama. Tradicionalno se procesi planiranja i autoriziranja smatraju odvojenim zadacima koji se izvršavaju u slijedu te se autoriziranje izvršava nakon što su napravljeni planovi za odvijanje procesa. Imajući u vidu činjenicu da su njihove funkcije obično komplementarne, veća se proizvodnost i reaktivnost mogu postići kad se one integriraju. Iako radovi koji se bave planiranjem i programiranjem integriranih procesa (IPPS) postaju sve popularniji, koliko mi znamo, nema rada koji razmatra integraciju planiranja i autoriziranja procesa. Cilj je ovoga rada upozoriti na integraciju planiranja i autoriziranja procesa predstavljanjem novog modela nazvanog planiranje i autoriziranje integriranih procesa (IPPA). Prvi rezultati primjene IPPA pokazuju da je primjereno vršiti takvo integriranje te onda i stjecati prednosti kroz tu integraciju. Mala poduzeća (SMEs) naročito mogu imati koristi od IPPA zbog toga što on slabo ovisi od (profesionalne) softverske podrške.Authorizing can be described as an endogenous system signal that determines whether a job release is allowed or not. Whereas job releases are scheduled in push systems, they are authorized in pull systems since pull-type manufacturing systems are controlled by downstream information. Traditionally, process planning and authorizing are regarded as separate tasks performed sequentially, where authorizing is implemented after process plans have been generated. In view of the fact that their functions are usually complementary, higher productivity and responsiveness can be achieved when they are integrated. Although the studies related with integrated process planning & scheduling (IPPS) are increasingly popular, according to our best knowledge, there is no study researching the integration of process planning and authorizing. This study aims to call attention to the integration of process planning and authorizing through presenting a novel model that is called integrated process planning & authorizing (IPPA). Primary implementation results of IPPA demonstrate that making the integration and hence gaining advantage through integration are pertinent. SMEs can especially get in favour of IPPA because of its slight dependence on (professional) software support

İtme, Çekme ve Senkronize Üretim Sistemlerini Kıyaslayıcı Bir Simülasyon Çalışması

In this study, performances of push, pull and synchronous production systems are investigated over a hypothetical serial line that consists of five work stations. The effects of four factors, i.e., work in process inventory level, system&rsquo;s output rate and flow time, on the system performance measures were tested conducting experiments via simulation models of push, pull and synchronous production systems. At the result of the experiment, optimized push, pull and synchronous production systems generated same quantity of system&rsquo;s output at the different level of work in process inventory. Kanban, constant work in process (CONWIP) and drum-buffer-rope (DBR) systems gave better performance than other systems&rsquo; performance. Kanban, CONWIP and DBR systems were compared with each other. This comparing showed us the best production system is changing at every scenario. The performances of the systems depend on the factor levels. To determine the best factor levels combination for Kanban, CONWIP and DBR systems the method of graphical representation of factors effects was used at this study.</p

Development of a framework for customer co-creation in NPD through multi-issue negotiation with issue trade-offs

In complex product design environments, new product development (NPD) becomes all about trade-offs and therefore trade-off management gets an important responsibility for designers. Correspondingly, in these environments, customer co-creation in NPD requires multi-issue negotiation with issue trade-offs. However, there is no study researching customer co-creation in NPD through multi-issue negotiation with issue trade-offs according to our best knowledge. This study presents a framework for customer co-creation in NPD through a multi-issue negotiation mechanism, namely: Modified Even-Swaps, to fill this gap. This mechanism uses a modified version of Even-Swaps method, that finds differences among alternatives and utilizes the differences for assessing the value of multi-issue offers, and that includes a fuzzy-inference-system for bargaining on several issues simultaneously. In the proposed framework. customers are represented by "lead-user". Thus, negotiation is performed between lead-user and designer. In order to show how the framework works, an illustrative example is also presented. (C) 2012 Elsevier Ltd. All rights reserved

Developing a Computer Program of Laser Aplication Imaged with Fundus Fluoresceın Angiography Test for Retinal Diseases

Amaç: Diabetik Retinopati olgulu gözlerde laser tedavi tekniğini kolaylaştıracak, asistan doktor eğitimleri sırasında tedavi tekniğinin anlatılmasına yardımcı olacak şekilde bir model tasarlanması amaçlandı.Gereç ve Yöntem: Çalışma kapsamında diabetik retinopati tanısı konulmuş 127 gözün tedavi öncesi Fundus Floresein Anjiyografi (FFA) görüntüsü alındı. Bunun için Kowa VX-10 cihazı kullanıldı. Çalışma iki adımda gerçekleştirildi. Birinci adım; optik disk ve makula bölgesinin tespiti, ikinci adım; görüntü üzerine laser tedavi tekniğine uygun model tasarlamaktır. Çalışma, görüntü işleme tekniklerini kullandığımız Matlab ortamında gerçekleştirildi.Bulgular: 127 diabetik retinopatili FFA görüntülerinde, optik disk ve makula bölgelerinin doğru tespitinde 240 micron sapma ile %80 oranında başarı elde edildi. Laser atış bölgelerinin işaretlenmesine ve yapılan işlemlerin arşivlenmesine imkan sağlayan bir model tasarlandı.Tartışma: Laser tedavi sırasında korunması gereken bölgelerin otomatik tespiti ve işaretlenmesi, laser atışı yapılmak istenilen yerlerin işaretlenmesine olanak sağlayarak koordinat bilgilerinin görülebildiği bu model daha az riskli ve daha etkin tedavi yöntemlerinin gelişmesinde kullanılabilir.Purpose: The aim was to design a model which facilitates laser treatment for Diabetic Retinopathy and the treatment technique was conducted during education of assistant doctors.Materials and Methods: 127 patients diagnosed with diabetic retinopathy had their eyes scanned by Fundus Floresein Angiography before treatment. Kowa VX-10 device was used for scanning / these images. This study had two steps one of which was to detect optic disc and macula region and the other was to design a model which was compatible with laser treatment over image/ display. Matlab software was used.Results: Optic disc and macula regions in 80% of the 127 FFA images with diabetic retinopathy were correctly detected (Standart Deviation: 240 micron). A model which enables laser shot region to be marked and tasks to be stored was designed.Conclusions: During laser treatment, the regions which need protection, are automatically detected and guarded. with this model it provides coordination of information by enabling places which required laser shot to be marked, and is used to develop less risky and more effective treatments

IMPROVEMENT OF MANUFACTURING PRODUCTIVITY AND RESPONSIVENESS THROUGH INTEGRATED PROCESS PLANNING AND AUTHORIZING

Authorizing can be described as an endogenous system signal that determines whether a job release is allowed or not. Whereas job releases are scheduled in push systems, they are authorized in pull systems since pull-type manufacturing systems are controlled by downstream information. Traditionally, process planning and authorizing are regarded as separate tasks performed sequentially, where authorizing is implemented after process plans have been generated. In view of the fact that their functions are usually complementary, higher productivity and responsiveness can be achieved when they are integrated. Although the studies related with integrated process planning & scheduling (IPPS) are increasingly popular, according to our best knowledge, there is no study researching the integration of process planning and authorizing. This study aims to call attention to the integration of process planning and authorizing through presenting a novel model that is called integrated process planning & authorizing (IPPA). Primary implementation results of IPPA demonstrate that making the integration and hence gaining advantage through integration are pertinent. SMEs can especially get in favour of IPPA because of its slight dependence on (professional) software support. Authorizing can be described as an endogenous system signal that determines whether a job release is allowed or not. Whereas job releases are scheduled in push systems, they are authorized in pull systems since pull-type manufacturing systems are controlled by downstream information. Traditionally, process planning and authorizing are regarded as separate tasks performed sequentially, where authorizing is implemented after process plans have been generated. In view of the fact that their functions are usually complementary, higher productivity and responsiveness can be achieved when they are integrated. Although the studies related with integrated process planning &amp; scheduling (IPPS) are increasingly popular, according to our best knowledge, there is no study researching the integration of process planning and authorizing. This study aims to call attention to the integration of process planning and authorizing through presenting a novel model that is called integrated process planning &amp; authorizing (IPPA). Primary implementation results of IPPA demonstrate that making the integration and hence gaining advantage through integration are pertinent. SMEs can especially get in favour of IPPA because of its slight dependence on (professional) software support.</p

Developing a Computer Program of Laser Aplication Imaged with Fundus Fluoresceın Angiography Test for Retinal Diseases

Amaç: Diabetik Retinopati olgulu gözlerde laser tedavi tekniğini kolaylaştıracak, asistan doktor eğitimleri sırasında tedavi tekniğinin anlatılmasına yardımcı olacak şekilde bir model tasarlanması amaçlandı.Gereç ve Yöntem: Çalışma kapsamında diabetik retinopati tanısı konulmuş 127 gözün tedavi öncesi Fundus Floresein Anjiyografi (FFA) görüntüsü alındı. Bunun için Kowa VX-10 cihazı kullanıldı. Çalışma iki adımda gerçekleştirildi. Birinci adım; optik disk ve makula bölgesinin tespiti, ikinci adım; görüntü üzerine laser tedavi tekniğine uygun model tasarlamaktır. Çalışma, görüntü işleme tekniklerini kullandığımız Matlab ortamında gerçekleştirildi.Bulgular: 127 diabetik retinopatili FFA görüntülerinde, optik disk ve makula bölgelerinin doğru tespitinde 240 micron sapma ile %80 oranında başarı elde edildi. Laser atış bölgelerinin işaretlenmesine ve yapılan işlemlerin arşivlenmesine imkan sağlayan bir model tasarlandı.Tartışma: Laser tedavi sırasında korunması gereken bölgelerin otomatik tespiti ve işaretlenmesi, laser atışı yapılmak istenilen yerlerin işaretlenmesine olanak sağlayarak koordinat bilgilerinin görülebildiği bu model daha az riskli ve daha etkin tedavi yöntemlerinin gelişmesinde kullanılabilir.Purpose: The aim was to design a model which facilitates laser treatment for Diabetic Retinopathy and the treatment technique was conducted during education of assistant doctors.Materials and Methods: 127 patients diagnosed with diabetic retinopathy had their eyes scanned by Fundus Floresein Angiography before treatment. Kowa VX-10 device was used for scanning / these images. This study had two steps one of which was to detect optic disc and macula region and the other was to design a model which was compatible with laser treatment over image/ display. Matlab software was used.Results: Optic disc and macula regions in 80% of the 127 FFA images with diabetic retinopathy were correctly detected (Standart Deviation: 240 micron). A model which enables laser shot region to be marked and tasks to be stored was designed.Conclusions: During laser treatment, the regions which need protection, are automatically detected and guarded. with this model it provides coordination of information by enabling places which required laser shot to be marked, and is used to develop less risky and more effective treatments