bluuebunny/crossref_metadata_2025 huggingface dataset:
Predicting the probability of Mount Merapi eruption using Bayesian Event Tree_Eruption Forecasting
Authors: Rinawati Dyah Ika , Sari Diana Puspita , Handayani Naniek Utami , Siwi Bramasta Raga
Published: February 2018

Mount Merapi is one of the active volcanoes in Indonesia that had varied eruption periods from two to eight years. Due to the density of the population living around the slopes of Mount Merapi, its eruptions caused high number of victims. In order to avoid high number of victims, the disaster management should be improved. Disaster management consist of four phases i.e. mitigation, preparedness, response and reconstruction. In disaster mitigation phase, prediction of the Merapi unrest probability is needed. This paper focus on how to predict the probability of Merapi unrest based on volcano-logical information by using Bayesian Event Tree. Bayesian Event Tree (BET) is a probabilistic model that merges all kinds of volcano-logical information to obtain probability of any relevant volcanic event. The result showed that the probability of Merapi unrest is 0,822. In the next eruption, it has predicted that the volcanic explosivity index (VEI) 2 was biggest chance with the probability of 0,549. It showed that the eruption will take place in the main crater of Merapi with the probability of 0,938.
Urban logistics profile – Yogyakarta city, Indonesia
Authors: Maria Sri Asih Anna , Maya Sopha Bertha , Mardiyah Siti
Published: February 2018

In recent years, more rural areas are becoming urban areas accompanied by escalation of logistics activities. Unlike passenger transport, the planning, policy and control of freight transport in developing countries have not been integrated into a reliable and efficient logistics system. Therefore, generating city logistics profile is necessary in order to support the planning of urban logistics system. This study aims to establish a logistics profile of Yogyakarta city, Indonesia, by dividing urban zones into several homogeneous groups, judging from several aspects, including city area features, product characteristics and agents/delivery profile. Logistics profile variables were calculated based on administrative boundaries, resulting in 45 areas to be investigated. Profiles were matched in groups of homogeneous stores (A), large commercial stores (C) and residential areas with local trade (D),with one overlapping profile, i.e. profile A and profile D, in some locations in the middle of the city.
Implementation of supply chain management in supplier performance assessment using Analytical Hierarchy Process (AHP) Objective Matrix (OMAX) and Traffic Light System
Authors: Sukendar Irwan , Nurwidiana  , Hidayati Diah Nurul
Published: February 2018

This study focuses on researching the implementation of supply chain management in supplier performance measurement using Analytical Hierarchy Process (AHP) Objective Matrix (OMAX) and Traffic Light System. The method used consisted of several stages: Identification stage of criteria variable and subcriteria variable, designing hierarchy AHP structure, calculating the weight of each criterion and subcriteria, supplier performance appraisal using OMAX method, calculating the total value of each supplier perfomance and identifying the performance of each supplier Using color indicator from Traffic Light System. Based on the results of the research, it can be seen that 9 out of 10 suppliers that are considered have a good performance while 1 supplier has a performance under the target.
Assessing university’s sustainability programs from the perspective of university students: a gap analysis
Authors: Ulkhaq M. Mujiya , Wijayanti Wismar R. , Wiganingrum Rahmaningtyas , Dewi Wini R. , Ardi Fahmi
Published: February 2018

The role of universities in promoting sustainability has outstretched over the past decades as a result of abundant declarations related to the need for sustainability in higher education. As consequences, several universities have integrated sustainability into their curricula, research, programs, projects, partnerships, and assessments. However, despite the need for sustainable development in today’s highly competitive global network, many university members especially students are still unaware or ignorant of sustainability practices. This research tried to analyse the gap between what the university has done in campaigning for sustainability and what the students have perceived. A case study is conducted in Diponegoro University, Indonesia. Twelve indicators of four variables, i.e., community outreach; sustainability commitment and monitoring; waste and energy; as well as land use and planning are used to accomplish this research. Three hundred and fortyfive students spreading from all faculties participated in the survey. The result shows that an average gap of –0.38 is revealed; indicating that the respondents did not consider a significant impact on the sustainability programs. In addition, more than 50% of the respondents were not familiar with the sustainability programs. It is suggested that the university has to put more attention in fostering sustainability to its biggest stakeholders.
Workload assessment on foundry SME to enhance productivity using full time equivalent
Authors: Sari Amarria Dila , Hardiansa Fajri , Suryoputro Muhamad Ragil
Published: February 2018

Aluminium SME aims to increase the production amount by producing wok as much as 300 Units. The problem is workload analysis of operator on the wok production line in the wok foundry SME as well as the production cycle-making cycle time and analyze the workload received by the operator when producing 300 woks using the full time equivalent (FTE) method. This study aims to measure the workload of each division worker in the production process with a total of 13 workers observed. This study provides a work division recommendation based on the workload that has been carefully examined. This research involves percentage of workload effectiveness and the wages of workers. In lathe division have overload workload. While the printing division, melting inspection division, packaging and transportation division including normal workload category and the percentage of good work effectiveness. The result provides recommendations for the addition of 2 workers in each division that includes the category of overload of the lathe division with the number of initial workers as many as 13 workers to 15 workers. In the last stage perform a simulation by comparing the system of prefix work and proposal. The simulation results obtained with the initial work system to get an average of 223 woks / day. Meanwhile, for the proposed work system to get an average output of 291 woks.
Fuzzy subtractive clustering based prediction model for brand association analysis
Authors: Widodo Imam Djati
Published: February 2018

The brand is one of the crucial elements that determine the success of a product. Consumers in determining the choice of a product will always consider product attributes (such as features, shape, and color), however consumers are also considering the brand. Brand will guide someone to associate a product with specific attributes and qualities. This study was designed to identify the product attributes and predict brand performance with those attributes. A survey was run to obtain the attributes affecting the brand. Subtractive Fuzzy Clustering was used to classify and predict product brand association based aspects of the product under investigation. The result indicates that the five attributes namely shape, ease, image, quality and price can be used to classify and predict the brand. Training step gives best FSC model with radii (ra) = 0.1. It develops 70 clusters/rules with MSE (Training) is 9.7093e-016. By using 14 data testing, the model can predict brand very well (close to the target) with MSE is 0.6005 and its’ accuracy rate is 71%.
Risk analysis of warehouse operation in a power plant through a Modified FMEA
Authors: Indrawati Sri , Karunia Ningtyas Kharina Novia , Khoirani Alfina Budi , Shinta Riadho Clara
Published: February 2018

Currently, electricity becomes basic needs for human’s life sustainability. Most of activities require electricity. Some power plant are demanded to be able to fulfil above necessity by distributing electricity as it required within time. Therefore, to accommodate good performance, it needs assessment on risk analysis, specifically at the warehousing division. A risk analysis is needed for assuring a good performance warehouse. A Modified FMEA method is used to analyse the risk. This method id done by identifying sources and root causes of a problem based on the value of risk priority number (RPN). The research is conducted in an Indonesian power plant, located in West Java. There are 10 types of failure modes. The result shows that the failure mode priority is inventory discrepancies. There are no difference ranking on the most impacted failure to be prioritized using FMEA and modified FMEA method.
Challenge and opportunity research in blood supply chain management: a literature review
Authors: Mansur Agus , Vanany Iwan , Indah Arvitrida Niniet
Published: February 2018

An interconnected series of the blood management is called blood supply chain management (BSCM). The stages of BSCM consisted of blood collecting, production, inventory, and distribution. The main challenges in BSCM are related to shortage, outdate, and supply chain cost which needed to minimize. Naturally, problems in BSCM are complex, it is not an easy task to find the solution. This complexity brought by several factors as follows: its inflicted risk, the uncertainty of supply and demand, blood nature as perishable commodity, demand uniqueness, and cost occurred. This research purposes was to review of various research related to BSCM and highlight opportunities to develop further research in blood supply chain (BSC). The result of this research is a suggestion on various possible future research to be explored in BSC, for example, developing an adaptive inventory model to support blood supply chain management that could be responsive toward demand fluctuation and developing collecting strategy to minimize shortage, outdate and incurred cost in supply chain level.
Analysis of customer satisfaction in hospital by using Importance-Performance Analysis (IPA) and Customer Satisfaction Index (CSI)
Authors: Helia Vembri Noor , Abdurrahman Cahya Putra , Rahmillah Fety Ilma
Published: February 2018

As a major health referral centre, the hospital demanded to provide comprehensive services provided by a multi-disciplinary team according to the needs of patient. In the expansion of a growing number of hospitals in Yogyakarta especially Sleman area where retreat acquire customers even more stringent, it is necessary to increase the quality of services. There are five determinants of service quality namely: reliability, responsiveness, assurance, empathy, and tangible. Collecting data is done by observation and distributing questionnaires to 70 respondents, and Importance-Performance Analysis and Customer Satisfaction Index are used to determine satisfaction level of outpatients. As a results, six out of twenty attributes need improvement, namely: a) The condition of the hospital is clean, comfortable and tidy; b) Guidance and information boards poly is easy to see and read; c) The ease and accuracy of obtaining information for patients (referrals, lab results, etc.); d) The hospital staff has a quick response to the needs of patients; e) Attention physicians in managing patients and willingness to provide a particular time for consultation; and f) The prescribed medication is suitable and safe. It is known that the value of CSI by 76% means the service is not satisfied the patient.
Risk control analysis of a furniture production activities using hazard identification and risk assessment method
Authors: Indrawati Sri , Prabaswari Atyanti Dyah , Fitriyanto M. Abdul
Published: February 2018

The furniture industry in Indonesia is growing rapidly that leads to technological development. But the use of technology in the industry creates some risk to worker safety. The number of work accidents in Indonesia at the end of 2016 is relatively high. Therefore, this research is conducted to identify hazards and determine risk control using hazard identification and risk assessment method (HIRA). There are three main stages, i.e. identify and analyze hazards, classify hazards and risk control. The result shows that there are nine potential hazards in furniture production, 22% of it is categorized as high risk level, i.e. hand slashed and fingers cut by machine. Three types of risk control activities are determined to minimize the risk, i.e. administration and engineering control and personal protective equipment.
Survey of customer expectation and satisfaction: preliminary research of a modular product design approach for sheep cage design
Authors: Rochman Yuli Agusti , Wati Dwi Ana Ratna
Published: February 2018

This study aims to produce a modular sheep cage design. Feeding, maintenance and integrated waste management are taking into account in the design. The modular and integrated product design provides advantages such as (1) easy way of making and modifying the product, (2) enabling the utilization of existing facilities such as shade, (3) giving the user a sense of convenience as the waste can be processed and not being a source of pollution. The Modular Quality Function Deployment (QFD) method is applied to identify modules associated with the customer needs of the product. A survey about customer expectation and satisfaction was conducted in order to evaluate the gap of both. The highest value of gap between customer expectation and satisfaction of products indicates that the customer needs are the focus of the problems. The most important customer needs are considered in modification and improvement of design. These are (1) the cage is not easy to fall down, (2) the sheep cage can last for long time, (3) it uses a strong frame, (4) the roof section materials is not easy to leak, and (5) It can be used even if one part of the cage is damaged.
Die design optimization on sheet metal forming with considering the phenomenon of springback to improve product quality
Authors: Darmawan Agung Setyo , Anggono Agus Dwi , Hamid Abdul
Published: February 2018

The process of sheet metal forming is one of the very important processes in manufacture of products mainly in the automotive field. In sheet metal forming, it is added a certain size at the die to tolerate a result of the elasticity restoration of material. Therefore, when the product is removed from the die then the process elastic recovery will end within the allowable tolerance size. Extra size of the die is one method to compensate for springback. The aim of this research is to optimize the die by entering a springback value in die design to improve product quality that is associated with accuracy the final size of the product. Simulation processes using AutoForm software are conducted to determine the optimal parameters to be used in the forming process. Variations the Blank Holder Force of 77 N, 97 N, and 117 N are applied to the plate material. The Blank Holder Force application higher than 97 N cannot be conducted because the Forming Limit Diagram indicates the risk of tearing. Then the Blank Holder Force of 37 N, 57 N and 77 N are selected and applied in cup drawing process. Even though a few of wrinkling are appear, however there is no significant deviation of dimension between the product and the design of cup.
Bolt connection behaviour of the cold-formed steel joint
Authors: Haris Sabril , Herman Hazmal , Zaidir  , Thamrin Rendy
Published: February 2018

This paper presents an experimental study of bolt connection behaviour of the cold-formed steel joint. A 5-mm bolt was used to combine two channel sections. The size of channel section was 75 mm height, 35 mm width and 0.75 mm thickness. Tension test was conducted to obtain material characteristics of the channel section. Two type of connections were observed: Connection Type-1 that back-to-back channel sections were joined on their web directly, and Connection Type-2 that two channel sections were joined on their flanges through a same-size channel connector. The specimen was pulled by an increasing monotonically load. It was found that ultimate condition of the joint occurred when the bolt was split due to shear failure and the bolt was rotated because the hole size increased; these two failure modes are covered in the Indonesian and Australian/New Zealand cold-formed steel codes. The ultimate loads from the test were compared to analytical calculations using the formulae provided in the codes. The analytical calculation predicted the resistances conservatively within the range of 4 – 22 %.
The development of green infrastructure through optimization of water resources carrying capacity in Yogyakarta urban area
Authors: Brontowiyono Widodo , Wacano Dhandhun , Lupiyanto Ribut
Published: February 2018

The development of Yogyakarta Urban Area has spread to its surroundings. As a result, water resources carrying capacity and environmental problems are worsening. Rainwater harvesting (RWH) development as part of green infrastructure is one of the important methods to increase water resources carrying capacity. Relating to the problem, this research was conducted in Yogyakarta Urban Area. The study was a combination of field research and studio analysis. The field study measured the settlement’s physical parameters and surveyed the community’s socio-economic and cultural aspects. According to the physical and economic analysis based on CBR, the recommended models of water resource conservation infrastructure were absorption well/1.10; conservation pond/4.53; open space/7.47; and green space/3.59. Meanwhile, rainwater reservoir was not suggested because the CBR value was only 0.18.
Clustering on Twitter: case study Twitter account of higher education institution in Indonesia
Authors: Hamzah Almed , Hidayatullah Ahmad Fathan
Published: February 2018

Recently, higher education institutions have been using Twitter as one of tools to enhance their communication network. This paper aims to cluster Twitter data retrieved from the official Twitter account of higher education institutions in Indonesia. We expect to obtain a valuable information from the tweet posted. Furthermore, we use Twitter’s hashtag as a basis of clustering. We collect data from n=10 institutions that have an official account on Twitter. The Affinity Propagation algorithm was employed to perform the clustering task. According to the clustering results, we conclude that higher education in Indonesia mostly utilize Twitter to post general information, news, agenda, announcement, information to the new students, and achievement.
Enhancing usability using Near Field Communication for mobile application
Authors: Wihidayat Endar , Ardi Ovide D.W.
Published: February 2018

Near Field Communication (NFC) as relatively new wireless communication technology pushes new challenges to application developers to make their applications easier to use and simpler to operate. This point of view known as usability element. Usability is one of the elements for creating good quality applications. This study aims to analyse the usability of mobile-based application embeds with NFC. We also try to evaluate usability in applications used by children. We developed an application called Receptionist which has a primary function as a communication tool between students, teachers and parents at a middle school. To know the impact of the NFC, the Receptionist input system is designed with two methods, via conventional navigation (using buttons) and via NFC. To understand the usability of each method, we do user testing and questioners on students. The results show, using the NFC there is a significant increase in usability attributes: efficiency, effectiveness, and learnability. On the other hand, there is decreases of user satisfaction comparing to conventional method. In general, this study demonstrates the potential of new input device technologies that can improve the usability of mobile-based applications.
The Process Automation of Temperature Measurement by Measuring Facility Which is Consists from Agilent E8363B and Freezer/Heating Chamber TNC-80
Authors: Dotsenko Olga , Frolov Kirill
Published: February 2018

The vector network analyzer Agilent PNA series E8363B and freezer and heating chamber TNC-80 were used to measure electromagnetic parameters of natural and artificial substances under temperature influences. LabView 2016 software was used to the virtual instrument generation. This virtual instrument is needed for efficient electromagnetic parameter and temperature measurement automation. The virtual instrument framework and faceplate of the virtual instrument are shown. The present work involves an experimental study of the magnetic permeability of ferrites with hexagonal structure under temperature influences. It is show that there is a nonlinear influence of temperature on magnetic permeability of W-type ferrites.
Synthesis Of Ultrasound Field Sources Based on Phase Screen Approximation
Authors: Sukhanov Dmitry , Zavyalova Ksenia , Erzakova Nadezhda
Published: February 2018

Here is proposed the method for synthesizing the sources of an acoustic field on the basis of an approximation of the phase screen. The technology of manufacturing ultrasonic phased arrays providing the formation of a field of a given distribution is proposed. An experimental setup has been developed for the formation of a vortex field at a distance of 10 cm.
Application of the E – Layer Model for Solving the Problems of Parametric Estimation in Measuring Devices
Authors: Yakunin Alexey , Suchkova Larisa
Published: February 2018

The article proposes a technique for estimating the maximum possible errors in measuring the parameters of the signals observed against a background of interference that do not exhibit statistical properties on the measurement interval and of which only the region of their possible change is known. This region is a layer within which the interference-free signal can vary due to the variation in the values of the parameters of the model function describing it. The technique is also proposed that makes it possible to estimate the measurement error of the monitored parameter for a specific implementation of the signal described by the proposed model with a confidence probability close to unity. An example of the use of the offered techniques for estimating the coordinate of a light stain created by a point source is shown. The offered approach is actual, when each measurement represents special worth and there is no possibility to improve the measurement result by averaging over the set of signal realizations.
Simulation Modeling of Intelligent Control Algorithms for Constructing Autonomous Power Supply Systems with Improved Energy Efficiency
Authors: Gimazov Ruslan , Shidlovskiy Stanislav
Published: February 2018

The paper considers the issue of supplying autonomous robots by solar batteries. Low efficiency of modern solar batteries is a critical issue for the whole industry of renewable energy. The urgency of solving the problem of improved energy efficiency of solar batteries for supplying the robotic system is linked with the task of maximizing autonomous operation time. Several methods to improve the energy efficiency of solar batteries exist. The use of MPPT charge controller is one these methods. MPPT technology allows increasing the power generated by the solar battery by 15 – 30%. The most common MPPT algorithm is the perturbation and observation algorithm. This algorithm has several disadvantages, such as power fluctuation and the fixed time of the maximum power point tracking. These problems can be solved by using a sufficiently accurate predictive and adaptive algorithm. In order to improve the efficiency of solar batteries, autonomous power supply system was developed, which included an intelligent MPPT charge controller with the fuzzy logic-based perturbation and observation algorithm. To study the implementation of the fuzzy logic apparatus in the MPPT algorithm, in Matlab/Simulink environment, we developed a simulation model of the system, including solar battery, MPPT controller, accumulator and load. Results of the simulation modeling established that the use of MPPT technology had increased energy production by 23%; introduction of the fuzzy logic algorithm to MPPT controller had greatly increased the speed of the maximum power point tracking and neutralized the voltage fluctuations, which in turn reduced the power underproduction by 2%.
24-Hour Fetal/Maternal Monitoring System Based on Phonocardiogram Analysis
Authors: Zhdanov Dmitry , Bureev Artem , Kosteley Yana
Published: February 2018

The article describes an engineering prototype of the Device for 24-hour monitoring over the functional state of the fetus and mother’s cardiovascular system in the antenatal period of pregnancy. The Device is a hardware and software system that ensures the registration and analysis of fetus and mother’s phonocardiograms with further processing and interpretation. The interpretation process is designed to timely detect conditions that constitute a threat to a fetus. The Device operates as part of a telemedicine network that allows obstetricians-gynecologists managing pregnant women to remotely control their state. The article describes the Device design concept and features of its specific components. The engineering prototype of the Device was used to carry out biomedical tests that confirmed its suitability for 24-hour monitoring over the functional state of fetus and mother’s cardiovascular system in home settings.
Calculation of the Magnetic Field of the Stator Windings of the Synchronous Machine
Authors: Zhumagulov Kuanyshbay , Sarsikeyev Yermek , Kapanova Dameli
Published: February 2018

This article discusses the possibility of applying a cylindrical coordinate system when examining the magnetic field of a synchronous machine.
Ways of Efficiency Improvement of the Organization of Students’ Independent Work with Computer Technologies Usage
Authors: Plotnikova Inna , Efremova Oksana , Chicherina Nataliya , Dalinger Victor
Published: February 2018

Recently the need for the qualified engineering personnel increases in the world. High-quality preparation of such shots begins at the university already with the first courses and it is directly connected with the effective organization of students’ independent work. In the article the organization of independent work when training students of technical colleges in mathematics with use of computer means is considered. The complex of the tasks developed by teachers included tasks in mathematics of four levels. It is shown that the independent solution of problems of different levels by the students of experimental group contributed to the development of mathematical abilities.
Situations in Construction of 3D Mapping for Slam
Authors: Nguyen Hoang Thuy Trang , Shydlouski Stanislav
Published: February 2018

Nowadays, the simultaneous localization and mapping (SLAM) approach has become one of the most advanced engineering methods used for mobile robots to build maps in unknown or inaccessible spaces. Update maps before a certain area while tracking current location and distance. The motivation behind writing this paper is mainly to help us better understand about SLAM and the study situation of SLAM in the world today. Through this, we find the optimal algorithm for moving robots in three dimensions.
Sources infrarouges à base de nano-antennes plasmoniques
Authors: Makhsiyan Mathilde , Bouchon Patrick
Published: February 2018

Un corps noir émet un rayonnement thermique sur un spectre large ne dépendant que de sa température. L’utilisation de concepts de la nanophotonique permet de modifier l’émissivité d’un objet artificiellement. En combinant des nano-antennes jouant le rôle d’émetteurs thermiques indépendants à des longueurs d’onde et pour une polarisation données, une nouvelle catégorie de sources est créée avec la possibilité d’avoir des transitions abruptes de l’émission sur une échelle spatiale correspondant à la limite de diffraction.
Minimally Invasive Mitral Valve Surgery in Re-Do Cases—The New Standard Procedure?
Authors: Salman Jawad , Naqizadah Jamshid , Avsar Murat , Shrestha Malakh , Warnecke Gregor , Ismail Issam , Rümke Stefan , Cebotari Serghei , Haverich Axel , Tudorache Igor , Fleißner Felix
Published: February 2018

Background Minimally invasive mitral valve surgery (MIMVS) is superior to “classical” mitral valve surgery via a sternotomy regarding wound healing and postoperative pain. It is however a more challenging procedure. Patients' preference is leading clearly toward minimally invasive approaches, and surgeons are driven by upcoming new technologies in interventional procedures such as the MitraClip. Especially in re-do cases, the access via right mini-thoracotomy, as previously non-operated situs, is a possible advantage over a re-sternotomy. We therefore retrospectively analyzed our result regarding MIMVS in re-do cases at our institute.

Methods From January 2011 and June 2016, 33 operations were MIMVS re-do procedures. Mean age was 60 years (±16 years), and 51% were male.

Results Sixty-one percent were elective cases, 29% were urgent cases, and 9% were emergency operations. Operation times, cardiopulmonary bypass (CPB) times, and clamp times were 235 minutes (±51 min), 149 minutes (±42 min), and 62 minutes (±45min), respectively. Mitral valve repair and replacement was performed in 24% (n = 8) and 76% (n = 25), respectively. Overall in-hospital mortality, apoplexy, and re-operation rates (all for bleeding) were 0% (n = 0), 3% (n = 1), and 9% (n = 3). New onset of dialysis was required in two (6%) patients. Two (6%) patients developed superficial wound infection. Overall intensive care unit (ICU) and hospital stay was 3 days (±4 days) and 15 days (±7 days), respectively.

Conclusion MIMVS for re-do cases can be performed with minimal mortality and morbidity and therefore represents a safe alternative to conventional mitral valve surgery in cardiac re-do operations. However, postoperative morbidity is highly dependent on preoperative patient status.
“Vascular Outlining”: Augmented Imaging for Transfemoral Access—A Preclinical Investigation
Authors: Eghbalzadeh Kaveh , Kuhn Elmar W. , Sabashnikov Anton , Weber Carolyn , Sahyoun Cherif , Rudolph Tanja , Baldus Stephan , Wahlers Thorsten C.W. , Mader Navid
Published: February 2018

Background Advanced visualization software tools have been used in clinics to improve the safety and accuracy of transcatheter procedure. Imaging techniques have greatly evolved during the era of transcatheter aortic valve implantation (TAVI). In a retrospective analysis, we investigated the feasibility of augmented fluoroscopy for iliofemoral access using a novel “Vascular Outlining” roadmapping technology.

Methods The Vascular Outlining prototype device (Philips Healthcare) application was used with iliofemoral angiography of 10 patients undergoing transfemoral TAVI. The software processes any conventional angiographic sequences, extracting the static outline of vessels and projecting the two-dimensional vessel margins as a roadmap on live fluoroscopy. Post-processed results were clinically assessed to determine whether the technical performance of the tool is sufficient.

Results Augmented imaging was possible in all investigated angiography sequences. The analysis of software-generated images showed accurate projection of the two-dimensional outline of the iliofemoral vessels as an overlay on the live fluoroscopy image in most cases. Overlay inaccuracy was only observed in cases with low contrast or patient movement.

Conclusion In static and contrasted angiography sequences, “Vascular Outlining” showed accurate image overlay. We identified that the quality of the vascular outline is dependent on the opacification of the contrast injection and the stability of the patient on the table. With further development. this application might increase the accuracy of femoral puncture and reduce the incidence of vascular complications. Clinical trials are needed to confirm these hypotheses.
Plexiform Neurofibroma of the Posterior Tibial Nerve Misdiagnosed as Proximal Tarsal Tunnel Syndrome: A Case Report
Authors: Nam Sang Hyun , Kim Jung Yeon , Ahn Jaeki , Park Yongbum
Published: February 2018

Plexiform neurofibromas of the foot are rare, benign tumors of the peripheral nerves. Diagnosis can be challenging if they present with symptoms mimicking other peripheral nerve pathologies. Tarsal tunnel syndrome is an entrapment syndrome of the entire tibial nerve behind the medial malleolus and under the flexor retinaculum. The clinical presentation typically includes posteromedial pain, positive Tinel's sign, and neurogenic signs, including both the sensation of numbness and the actual hypoesthesia and clawing of the toes.

Here, we report the case of a 59-year-old female patient with plexiform neurofibroma with symptoms similar to those of tarsal tunnel syndrome. The plexiform neurofibroma was surgically excised and the nerve function was partially preserved.
Return to Sports after Unicompartmental Knee Arthroplasty: Reality or Utopia? A 48-Month Follow-Up Prospective Study
Authors: Lo Presti Mirco , Cialdella Sergio , Agrò Giuseppe , Grassi Alberto , Caravelli Silvio , Mosca Massimiliano , Marcheggiani Muccioli Giulio , Zaffagnini Stefano , Costa Giuseppe
Published: February 2018

Unicompartmental knee arthroplasty (UKA) has increased in popularity in the last years, also in younger and more active patients with great expectancies. The purpose of our study was to investigate the change in sports activities before and after medial UKA. We surveyed 53 athletic patients; all underwent cemented medial UKA, to determine not only their subjective and objective evaluation of clinical status with Hospital for Special Surgery (HSS) and visual analog score (VAS) score, but also their sporting and recreational activities at a mean follow-up of 48 ± 6 months (range, 18–56 months). At the last follow-up, 48 of 53 patients were engaged in sports and recreational disciplines, resulting in a return to activity rate of 90%. No early failure and no cases of revision were reported. The frequency of activities (sessions per week) and the time session remained constant at the time of survey. The most common activities after surgery were hiking, cycling, and swimming. Several high-impact activities, as well as skiing and football, had a significant decrease in participating patients. There were no gender-, age- and body mass index (BMI)-related differences. UKA can be considered a viable alternative in relatively young patients with high functional requirements and the correct indications, however, warning the patients about the risks of polyethylene wear and early loosening of the prosthetic components as a result of the resumption of sporting activities in high impact.

Level of Evidence Prospective case series, level 4.
Femoral Component Sizing in Oxford Unicompartmental Knee Replacement: Existing Guidelines Do Not Work for Indian Patients
Authors: Malhotra Rajesh , Gaba Sahil , Kumar Vijay , Srivastava Deep , Pandit Hemant , Wahal Naman
Published: February 2018

Oxford unicompartmental knee replacement (OUKR) has shown excellent long-term clinical outcomes as well as implant survival when used for correct indications with optimal surgical technique. Anteromedial osteoarthritis is highly prevalent in Indian patients, and OUKR is the ideal treatment option in such cases. Uncertainty prevails about the best method to determine femoral component size in OUKR. Preoperative templating has been shown to be inaccurate, while height- and gender-based guidelines based on European population might not apply to the Indian patients. Microplasty instrumentation introduced in 2012 introduced the sizing spoon, which has the dual function of femoral component sizing and determining the level of tibia cut. We aimed to check the accuracy of sizing spoon and also to determine whether the present guidelines are appropriate for use in the Indian patients. A total of 130 consecutive Oxford mobile bearing medial cemented UKR performed using the Microplasty instrumentation were included. The ideal femoral component size for each knee was recorded by looking for overhang and underhang in post-operative lateral knee radiograph. The accuracy of previous guidelines was determined by applying them to our study population. Previously published guidelines (which were based on Western population) proved to be accurate in only 37% of cases. Hence, based on the demographics of our study population, we formulated modified height- and gender-based guidelines, which would better suit the Indian population. Accuracy of modified guidelines was estimated to be 74%. The overall accuracy of sizing spoon (75%), when used as an intraoperative guide, was similar to that of modified guidelines. Existing guidelines for femoral component sizing do not work in Indian patients. Modified guidelines and use of intraoperative spoon should be used to choose the optimal implant size while performing OUKR in Indian patients.
More Severe Preoperative Kellgren–Lawrence Grades of Knee Osteoarthritis were Partially Associated with Better Postoperative Patient-Reported Outcomes in TKA Patients
Authors: Witjes Suzanne , Koenraadt Koen , Aarts Ruud , Weert Thomas , van Geenen Rutger , Hoorntje Alexander
Published: February 2018

Total knee arthroplasty (TKA) is a successful procedure, although up to 20% of patients remain dissatisfied. Preoperative identification of appropriate TKA candidates is essential for improving satisfaction. This study investigated if preoperative radiographic severity was associated with postoperative pain, function, and quality of life after TKA. We performed a cross-sectional cohort study including 327 TKA patients. Radiographic severity was determined by two independent radiologists using the Kellgren and Lawrence (KL) score. The Knee Injury and Osteoarthritis Outcome Score (KOOS), the New Knee Society Score (New KSS), and Anterior Knee Pain Score (AKPS) were collected. We evaluated the association between KL grade and patient-reported outcome measures (PROMs) with the use of regression analysis techniques. Out of 228 responders, 195 patients completed the questionnaire sufficiently. Forty-seven patients were classified as KL grades 1 to 2, and 144 patients were classified as KL grades 3 to 4. The inter-observer reliability between both radiologists was substantial (ϰ = 0.67). After adjusting for age, sex, and body mass index (BMI), the New KSS subscales symptoms and expectations, and the KOOS subscale quality of life were significantly higher in the KL grades 3 to 4 group. However, neither the remaining KOOS subscales and AKPS nor KOOS change scores differed between both groups. Thus, more severe osteoarthritis (OA) resulted in better outcomes after TKA, although this association was not observed for all PROMs. The use of new PROMs, such as the New KSS, could be more reliable because of lower ceiling effects than the KOOS. Investigating the value of additional methods to assess radiographic severity (such as semi-flexed knee radiographs and MRI) is imperative to reliably identify knee OA.
A Modern Approach to Preventing Prosthetic Joint Infections
Authors: Congiusta Dominick , Scuderi Giles , Cushner Fred , Papas Paraskevi
Published: February 2018

Total knee arthroplasty (TKA) is recognized as one of the most successful surgical procedures performed today. One of the most common and dreaded complications of TKA is postoperative infection. To prevent infections, it is critical to identify patients at high risk through analyzing their risk factors, and help in addressing them prior to surgery. The effort to prevent infection must be carried through every step of the surgical process, from preoperative counseling to intraoperative measures and postoperative protocols. Hair removal, the application of antiseptics, the utilization of antibiotics, barbed sutures, smart dressings, and antibacterial washes are some of the avenues surgeons may explore to help prevent infection.
Hypertensive Krise und posteriores reversibles
Enzephalopathie-Syndrom (PRES)
Authors: Eberhardt Olaf
Published: February 2018

Die therapeutische Dringlichkeit der hypertensiven Entgleisung wird vorrangig vom
Vorliegen von akuten neurologischen, okulären, kardiopulmonalen oder renalen
Endorganschäden bestimmt. Ohne akute Endorganschäden (hypertensive urgency) ist
in der Regel eine orale Behandlung mit dem Ziel der RR-Normalisierung über 24–48
h ausreichend. Bei gravierenden hypertensiven Organsymptomen (hypertensive
emergency, hypertensiver Notfall) ist eine zügige intravenöse Initialtherapie
erforderlich, bei der die Präparatewahl und das Blutdruckziel von der
Organmanifestation und Begleiterkrankungen abhängig sind. Empfehlungen zur
optimalen Blutdrucksteuerung bei akuten neurovaskulären Erkrankungen werden
durch divergierende Studienergebnisse und die Vielfalt potentiell relevanter
Parameter erschwert. Das breite Spektrum des posterioren reversiblen
Enzephalopathie-Syndroms kann in atypischen Fällen die Diagnose erschweren.
Clevidipin könnte in Zukunft eine willkommene Erweiterung der intravenösen
Therapieoptionen auch für neurologische Patienten darstellen.
Mikrobielle Keratitis, Teil 1: allgemeine Aspekte und bakterielle Keratitiden
Authors: Schmack Ingo , Müller Michael , Kohnen Thomas
Published: February 2018

Infektiöse Entzündungen der Hornhaut (mikrobielle Keratitiden) stellen potenziell visusbedrohende Erkrankungen dar. Je nach Schweregrad und Verlauf können sie bis zum Verlust des Auges führen. Entscheidend für das Sehvermögen ist, dass die Erreger schnell erkannt und zielgerichtet therapiert werden. Dieser Beitrag behandelt zunächst generelle klinische, diagnostische und therapeutische Aspekte mikrobieller Keratitiden und geht anschließend auf die Besonderheiten bakterieller Keratitiden ein. In einem zweiten Teil werden klinische, methodische und therapeutische Besonderheiten von Keratomykosen und Akanthamöbenkeratitiden besprochen [1].
Cybersecurity: The Three-headed Janus
Authors: Diffee Erica , Datta Pratim
Published: February 2018

Multiple entities define the stage: Ayn, an accomplished CIO; James, an idealistic CEO; Kira, an unscrupulous hacker; Randcom, a rail company; and Zuidia, a country reinventing itself. These entities intersect in a tense cybersecurity gameplay. A cyber-attack rages across multiple fronts, targeting Randcom's technology, processes, and people, suddenly delivering a staggering blow to the company. Ayn stands in the eye of the storm, figuring a path forward. This cybersecurity case study offers an active learning and role-playing experience for students. Immersing the student in the anatomy of a cybersecurity attack, this case converges various perspectives: the hacker, the company, and the macro environment (e.g., country culture). In the process, this case highlights conflicting strategic choices and opportunity costs of decisions in an environment that requires a company to be both competitive and yet secure across three cybersecurity facets: technology, processes, and people. This case could be used as a class discussion and exercise as well as a role play with multiple protagonists. Specific roles include the CEO, the CIO, the hacker, and the CFO. This case brings together multiple viewpoints, often conflicting, representative of real-life decisional and ethical dilemmas in the context of a company. This case, further contextualized using a developing country as the backdrop, adds an additional layer of decisional trade-offs. Nonetheless, this case is representative of IS and cybersecurity decision making in a company, regardless of the type of country.
Local mass and energy transports in evaporation processes from a vapor-liquid interface in a slit pore based on molecular dynamics
Authors: Fujiwara K. , Shibahara M.
Published: February 2018

Molecular evaporation processes from a vapor-liquid interface formed in a slit-like pore were examined based on the classical molecular dynamics method, in order to elucidate a molecular mechanism of local mass and energy transports in a slit. The calculation system consisted of monatomic molecules and atoms which interact through the 12-6 Lennard-Jones potential. At first, a liquid was situated in a slit with a vapor-liquid interface, and instantaneous amounts of the mass and energy fluxes defined locally in the slit were obtained in two dimensions to reveal local fluctuation properties of the fluid in equilibrium states. Then, imposing a temperature gradient in the calculation system, non-equilibrium evaporation processes in the slit were investigated in details based on the local mass and energy fluxes. In this study, we focused on the fluid which is in the vicinity of the solid surface and in contact with the vapor phase. In the non-equilibrium evaporation processes, the results revealed that the local energy transport mechanism in the vicinity of the solid surface is different from that of the vapor phase, especially in the case of the relatively strong fluid-solid interaction. The results also revealed that the local mass transport in the vicinity of the solid surface can be interpreted based on the mechanism of the local energy transport, and the mechanism provides valuable information about pictures of the evaporation phenomena especially in the vicinity of the hydrophilic surfaces. It suggests that evaluating and changing this mechanism of the local energy transport are necessary to control the local mass flux more precisely in the vicinity of the solid surface.
General Practitioners providing obstetric care in New Zealand. What differentiates GPs who continue to deliver babies?
Authors: Mason Zara , Jaye Chrys , Miller Dawn
Published: February 2018

ABSTRACT

AIM
To identify factors that have enabled some New Zealand general practitioner obstetricians (GPOs) to continue providing maternity care and factors implicated in decisions to withdraw from maternity care.

METHOD
Semi-structured interviews and one focus group (n = 3) were conducted with 23 current and former GPOs. Interviews were transcribed and analysed thematically.

RESULTS
Current and former GPOs practiced maternity care because they enjoyed being involved in the birth process and delivery suite environment. Their maternity practice was framed by a philosophy of lifelong continuity of care for patients.
Legislative changes in New Zealand and barriers to shared care that resulted in many GPOs withdrawing from maternity care left remaining GPOs feeling professionally isolated; another reason for ceasing maternity care. Funding was perceived to be inadequate and on-call demands were both major disincentives to providing maternity and intrapartum care.
Current GPOs often have strong supportive local relationships with other maternity providers when compared with those no longer practicing. Local shared care arrangements enhance professional support and reduce professional isolation.

CONCLUSION
GPOs still practicing in New Zealand do so because they find maternity care highly rewarding despite their perceptions that the current maternity care model is incompatible with general practice. They have often developed local solutions that support their practice, particularly around shared care arrangements.
An 𝐿^{𝑝} theory of sparse graph convergence I: Limits, sparse random graph models, and power law distributions
Authors: Borgs Christian , Chayes Jennifer , Cohn Henry , Zhao Yufei
Published: February 2018

We introduce and develop a theory of limits for sequences of sparse graphs based on

L
p

L^p

graphons, which generalizes both the existing

L
∞

L^\infty

theory of dense graph limits and its extension by Bollobás and Riordan to sparse graphs without dense spots. In doing so, we replace the no dense spots hypothesis with weaker assumptions, which allow us to analyze graphs with power law degree distributions. This gives the first broadly applicable limit theory for sparse graphs with unbounded average degrees. In this paper, we lay the foundations of the

L
p

L^p

theory of graphons, characterize convergence, and develop corresponding random graph models, while we prove the equivalence of several alternative metrics in a companion paper.