bluuebunny/crossref_metadata_2025 huggingface dataset:
Resource Scheduling Problem in Distribution Center
Authors: Hamontree C. , Prompakdee S. , Koiwanit J.
Published: October 2019

Due to the rapid growth of the retail shop trend recently, the Distribution Center (DC) or warehouse had become to be a vital part in the supply chain in order to store goods from multiple suppliers and deliver to multiple retailers. Cross docking is a relatively the logistics technique used in the DC in order to move materials from inbound trailers to outbound trailers as quickly as possible. From the following problem, an ineffectual DC management leads to the resources utilization problem such as machine, forklift, industrial trucks, etc. The main objective of this research is to study and solve the scheduling problem of the usage of the forklift in the Cross docking of DC and to manage the inbound and outbound docks in order to minimize Tardiness jobs, and also to maximize the efficiency of machine utilization. This study has provided the scheduling, comparison from genetic algorithm and heuristic method. As the result came out we found that the forklift scheduling by the genetic algorithm method is given the better management result better than heuristic method.
Qualitative analysis for sweetness classification of longan by near infrared hyperspectral imaging
Authors: Sahachairungrueng W , Teerachaichayut S
Published: October 2019

Near infrared analysis is a nondestructive technique used for determining the quality of various materials including fruit and other food. The objective of this study was to test whether near infrared hyperspectral imaging could be used for classifying sweetness of longan. One hundred and twenty samples were divided into a calibration set (n = 80) and a prediction set (n = 40). The average absorbance spectra from samples in the wavelength range of 935-1720 nm were used in this study. The sweetness of longan was represented by total soluble solids (TSS) which was used to separate fruit into a low sweet (TSS≤ 21.30°Bx) and high sweet fruit (TSS> 21.30°Bx). A classification model was developed in order to classify groups of longan based on sweetness, where 0 = low sweet and 1 = high sweet, by partial least squares discriminant analysis (PLS-DA). Spectra were preprocessed using a Savitzky-Golay smoothing method in order to obtain the optimal performance of the classification model. The results showed an accuracy of the classification model in the calibration set of 85% and the accuracy was 77.5% in the prediction set. Therefore, it was concluded that near infrared hyperspectral imaging has a potential for classifying longans nondestructive based on sweetness.
Biological activities and GABA content of Ma-Lod (Elaeagnus latifolia Linn.)
Authors: Meeploy M , Niwaspragrit C
Published: October 2019

Elaeagnus latifolia Linn. is a type of wild edible fruit plant belonging to the family Elaeagnaceae locally known as Ma-Lod in the Upper North of Thailand. In this study, the fruit of twelve Ma-Lod trees, namely ML-1, ML-2, ML-3, ML-4, ML-5, ML-6, ML-7, ML-12, ML-16, ML-17, ML-18, and ML-19, collected from Sangkhom District, Nong Khai Province were investigated for tyrosinase inhibitory activity, antioxidant activity, free radical scavenging activity, total phenolic content and GABA content. The results show that the reducing power of Ma-Lod flesh extracts highly correlated with their phenolic contents indicating phenolic compounds could be one of the main contributors to oxidant reducing power. Among twelve tested Ma-Lod trees, fruit flesh extracts of ML-1, ML-4, ML-5, and ML-17 were considered to be a promising source of biologically active compounds due to their high total phenolic contents, antioxidant activity and outstanding of tyrosinase inhibitory activity. GABA was also found in Ma-Lod flesh extract and the high recovery of GABA after passing through the Dowex 50W-X8 column was obtained. This wild and underutilized fruit exhibits many valuable characteristics which deserve conservation and utilization. It could be a potential source of natural biologically active compounds in the development of value-added products such as antioxidant-rich products and cosmetics. In addition, new investigation of the presence of GABA in Ma-Lod fruit might lead to the development of GABA food supplement in the future.
Detection of nosemosis in European honeybees (Apis mellifera) on honeybees farm at Kanchanaburi, Thailand
Authors: Maksong Samrit , Yemor Tanawat , Yanmanee Surasuk
Published: October 2019

This study was aimed to the detection of Nosema in European honeybees at Kanchanaburi Province and Identify species of Nosema by Polymerase Chain Reaction technique. The ventriculus of bees was individually checked to verify the presence of Nosema spores under light microscope. The number of spores per bee were quantify on a haemocytometer for infectivity. It was studied for three periods of the year. The first period was studied between October 2015 to January 2016, the second period from February to May 2016 and the third period from June to September 2016. The results showed that the highest infection rate in June-September 2019 was 100 and the lowest infection rate was 40 in October 2015 and January 2019. The average number of Nosema spores infection level in an individual was infectivity. The highest infectivity was 2.47x106 spores/bee in February to May 2016 and the lowest infectivity was 0.04x106 spores/bee in October 2015 to January 2016. Nosema
ceranae was found in this study by Polymerase Chain Reaction technique.
Retraction: Sensory Evaluation and Acceptability of Bambusa blumeana as Bamboo Shoot Polvoron (IOP Conf. Series: Materials Science and Engineering 639 012042)
Authors: Elumbra R
Published: October 2019

This paper was retracted by IOP Publishing on 28 October 2019 as it was intended to be withdrawn before publication.

Retraction published: 28 October 2019
Development of Star Pattern Recognition Algorithm for Star Sensor Using

C3n

Combination of Triangles Pattern
Authors: Ardi N S , Poetro R E , Saifudin M A , Fathurrohim L
Published: October 2019

The use of star sensor, which is the most accurate attitude sensor on satellites, began to penetrate into micro satellites and nano satellites. Thus the need arises to research and develop star sensor independently to meet the specific design of micro satellites and nano satellites. There are mainly two aspects to be considered in star sensor: hardware and software (algorithm). Star sensor’s algorithm is also known as star pattern recognition algorithm. This paper deals with development of star pattern recognition algorithm using

C
3
n

combination of triangles pattern, that is when there are n stars to be used to do pattern recognition, then

C
3
n

combination of triangles pattern would be generated. Success rate test are conducted in digital simulation approach using various number of stars that be used to do pattern recognition and various of star image resolution to test its robustness against star spot centroiding error. Results show that this algorithm has high level of success rate even on low resolution of star image, but has increased processing time when more stars are used to do pattern recognition.
Development of Hybrid Simulation Model of Air Traffic Management in the Terminal Control Area
Authors: Medianto R , Pasaribu H M , Muhammad H
Published: October 2019

The air traffic density at the Terminal Control Area can lead to several problems related to the safety and efficiency of flight operation if not adequately managed. These problems include the increased risk of crashes between aircraft, airborne and ground delays, waste of fuel and environmental problems caused by gas emission and noise. One of the analysis tools to solve these problems is the hybrid simulation model. The socio technic characteristics of the system can be observed more intact using a hybrid simulation model so that the results of the analysis more precise and comprehensive. This article describes the research framework and progress on the development of the hybrid simulation model of an ATM system in the Terminal Control Area. The final model will integrate of agent-based simulation, discrete event simulation, and system dynamics models. An agent-based simulation model that defines the movement of aircraft in the Terminal Control Area has been developed in this early research phase. The initial model can describe the rules for minimum separation between aircraft that are applied to ensure the safety of flight operations. The following aircraft will reduce its speed so that an adequate separation distance is obtained with the aircraft in front of it. The model then will be improved by integrating a discrete event simulation and system dynamics models on the initial model to obtain a complete hybrid simulation model.
Prediction of springback in the air V-bending of metallic sheets
Authors: Trzepiecinski T , Lemu H G
Published: October 2019

Springback is a critical phenomenon in design and analysis of sheet metal forming process of metallic sheets. An accurate prediction of elastic recovery of material allows to design forming tools which take into account springback compensation. Springback is influenced by many factors including mechanical properties of material, friction conditions, temperature and geometry of bending die. In this paper, the investigations are focused on the analysis of an intelligent air bending process using an artificial neural network (ANN). The air bending experiments were carried out in a designed semi closed 90° V-shaped die. The tests were conducted on three grades of sheet metals: aluminium 1070, brass CuZn37 and deep-drawing quality steel sheet DC04. The results of experimental tests were used as a training set for back-propagation learning of a multilayer artificial network built in Statistica Neural Network program. For all materials tested, an increase of the springback coefficient is observed when the bend angle increases. The results of neural prediction are in a good agreement with the experiments. The correlation coefficient of ANN prediction to the experimental results is equal to about 0.99.
Hydrodynamic analysis of Remotely Operated Vehicle (ROV) Observation Class using CFD
Authors: Satria D , Wiryadinata R , Esiswitoyo D P A , Adji M I , Rosyadi I , Listijorini E , Sunardi
Published: October 2019

Remotely Operated Vehicle (ROV) is a small marine craft used for underwater observation. Hence, the analysis of hydrodynamic characteristics is important. Hydrodynamic characteristics can be obtained by fluid dynamic visualization and simulation of Computational Fluid Dynamic (CFD). In this paper, ROV Hydrodynamic characteristics begin by forming a three-dimensional (3D) ROV model, forming link elements (mesh) from the 3D ROV model, and forming the computational domain used for CFD simulations. CFD simulations were conducted by analyzing the fluid flow angle variations that represent motion of the ROV, namely translational motion and rotational motion towards the vertical axis (yaw). The simulation results obtained were compared with the previous ROV design that had been developed, so as to obtain an evaluation of the results of the design optimization. The results showed an increase in the hydrodynamic characteristics of the optimal ROV design indicated by the value of drag, pressure distribution, and fluid flow contour.
Development Testing Method and Analysis Static Thrust for Propeller Based Propulsion
Authors: Khasyofi M , Hartono F
Published: October 2019

Propulsion system development involved aircraft manufacturer and engine or propeller manufacturer to perform test and evaluation. The main of this research was propulsion testing for unmanned aerial vehicle by evaluating thrust in static condition. Static thrust testing was conducted by force measurement using load cell and data acquisition systems. Thrust measurement result was compared with analytical method and computer fluid dynamic simulation. Analytical method in this paper used vortex blade element theory to calculated static thrust meanwhile Computational fluid dynamic was running both 2 dimension and 3 dimension simulation. Vortex blade element theory analysis combined with computational flight dynamic simulation for propeller aerofoil at 70% location. Test result compared with analytical and CFD calculation using non dimensional parameter. Analytical calculation deviated 5.08% from experiment meanwhile CFD calculation give 13.56% but still in error tolerances. Error tolerances considered from friction force, sensor accuracy and air density correction with total 6.33 kgf.
Manufacturing Fiberglass-Epoxy LSU-03 Aircraft Propeller Using Hand Lay-up and Vacuum Assisted Resin Transfer Moulding (VARTM) Methods
Authors: Dwi A Z , Syamsudin H
Published: October 2019

One of important aspect in designing a good quality product is on the method of how to manufacture it. In the world of aviation, products are required to meet several design criteria namely, strength, weight, and cost. Based on these design criteria, a study was carried out to manufacture LSU-03 propeller product sample using two manufacturing methods, i.e. hand lay-up and vacuum assisted resin transfer molding (VARTM). The objective is to design the manufacturing processes and to compare the quality of the propellers. The material used in this study are E-glass fiber cloth 135 and Epoxy “Lycal” resin. Prior to the propeller manufacturing process, several testing based on ASTM of manufactured composite plate was carried out to determine important parameters, i.e. thickness distribution, fiber volume fraction and voids content. A total of 3 propellers were manufactured. In order to determine the conformity of the product, propeller geometry is then measured and compared to the design mold. Finally, the comparison of the quality was made between the products of two methods. The quality of propeller products is measured based on calculated mass, thickness, void, fiber volume fraction, cost, surface quality and geometry conformity. It was concluded that VARTM is better than standard HLU and therefore more suitable for LSU-03 aircraft propeller production.
Chatter Identification in End Milling Process Based on Cutting Force Signal Processing
Authors: Tran M Q , Liu M K
Published: October 2019

During milling process, chatter is one of the major limitations of productivity, it has more negative effects on the surface finish, dimensional accuracy and tool life. It is thus necessary to detect and avoid chatter occurrence. In this study, a chatter detection approach based on cutting force signal is presented. The milling force signals were measured by cutting force sensor and then analyzed by using time-frequency analysis approaches such as short-time Fourier transform (STFT) and continuous wavelet transform (CWT) in order to identify chatter. The different sets of cutting conditions were utilized to recognize chatter presence. The spectrogram and scalogram results of the force signals represented a great difference in frequency content between stable and unstable cuttings. The analysis results were then validated by cutting force behavior in the time domain.
Performance Analysis of Non–Oriented Electrical Steel with Optimum Texture for High–Speed Traction Motors
Authors: Mukundan Shruthi , Mehdi Mehdi , Dhulipati Himavarsha , Chauvin Lucas , Edrisy Afsaneh , He Youliang , Tjong Jimi , Kar Narayan C.
Published: October 2019

The magnetic properties of non–oriented electrical steel (NOES) vary significantly with respect to the microstructure and crystallographic texture of the final steel sheets, which, in turn, are highly dependent upon the thermomechanical processing parameters used during hot rolling, cold rolling and annealing. This paper performs an exploratory performance analysis of NOES for use in high–speed traction motors, emphasizing the importance of obtaining an appropriate crystallographic texture to achieve the desired magnetic properties by controlling the annealing temperature and holding time. A 3.2% Si NOES annealed at 860°C for 24 hours after hot rolling can result in reduced core losses after cold rolling and final annealing. This material was chosen for the performance analysis of a laboratory scale high–speed, high–power traction motor (45 kW, 10,000 rpm) using finite element analysis (FEA). The motor using the NOES is compared to that using a commercially available grain–oriented electrical steel (GOES) to highlight the feasibility and advantages of NOES for high–speed motor applications. In addition, the motor performance using the NOES is compared to that using commercial NOES to understand the scope of improvement obtained by optimizing the microstructure and texture of the steel sheet.
The Effect of Machining Parameters to the Surface Roughness in Low Speed Machining Micro-milling Inconel 718
Authors: Kiswanto Gandjar , Azmi M , Mandala A , Ko T. J.
Published: October 2019

In recent years, the rapid technology development in industry sector, especially in aviation industry has been increasing. So that we need more capabilities in the micro-scale manufacturing process, especially micro-milling process which can produce good surface roughness and high complexity parts. In this study, the effect of machining parameters to the surface roughness investigated by using Inconel 718 material with cutting tool diameter 1 mm, carbide material with coating TiAlN. The machining process was performed in low speed machining category. There are three variations of spindle speed (3.000, 7.000, 10.000 RPM) and also feed rate (0.5, 1, 2 mm/s) with constant depth of cut 10 μm. The relationship between machining parameters and surface roughness was obtained. The higher the feed rate, the higher the surface roughness produced. On the other hand, the higher the spindle speed the smaller the surface roughness. It also found that the machining process with low spindle speed, below 10.000 RPM, successfully carried out on hard-to-cut material, Inconel 718, that will be increasing the flexibility of machining parameters.
Novel design for the adjustable knock-out mechanism with a Roberts linkage
Authors: Yu C Z , Wu F G
Published: October 2019

This article presents a new adjustable knock-out mechanism of a bolt former with a Roberts linkage and an adjustable crank-rocker linkage. The design requirements of the new mechanism are based on the analysis of an existing adjustable knock-out mechanism. The new adjustable knock-out mechanism mainly consisting of a Roberts linkage, and an adjustable crank-rocker linkage is proposed to meet the specified requirements. The path of the knock-out screw is approximately a straight line and the method presented is illustrated by an example.
Polarisation control for optical nanofibres by imaging through a single lens
Authors: Tkachenko Georgiy , Lei Fuchuan , Chormaic Síle Nic
Published: October 2019

We present a simple method for controlling the polarisation state of light at the waist of a single-mode optical nanofibre. The method consists of complete polarisation compensation based on imaging scattered light from inherent inhomogeneities both on the fibre surface and in the glass material itself. In contrast to the recently reported protocol exploiting two imaging systems oriented at 45° to each other, our method requires only one lens and a video camera. It is particularly useful for nanofibre-based applications with severe geometric constraints, such as inside vacuum chambers for experiments with cold atoms. The measured fidelity of the achieved control is about 98% using lenses with moderate numerical apertures.
Prepregnancy Diabetes and Perinatal Mental Illness: A Population-Based Latent Class Analysis
Authors: Brown Hilary K , Cairncross Zoe F , Lipscombe Lorraine L , Wilton Andrew S , Dennis Cindy-Lee , Ray Joel G , Guttmann Astrid , Vigod Simone N
Published: October 2019

We examined the risk of any perinatal mental illness associated with prepregnancy diabetes and identified how diabetes duration, complexity, and intensity of care affect this risk. We performed a population-based study of women aged 15–49 years with (n = 14,186) and without (n = 843,818) prepregnancy diabetes who had a singleton livebirth (Ontario, Canada, 2005–2015) and no recent mental illness. Modified Poisson regression estimated perinatal mental illness risk between conception and 1 year postpartum in women with versus without diabetes and in diabetes groups, defined by a latent class analysis of diabetes duration, complexity, and intensity-of-care variables, versus women without diabetes. Women with diabetes were more likely than those without to develop perinatal mental illness (18.1% vs. 16.0%; adjusted relative risk = 1.11, 95% confidence interval: 1.07, 1.15). Latent classes of women with diabetes were: uncomplicated and not receiving regular care (59.7%); complicated, with longstanding diabetes, and receiving regular care (16.4%); and recently diagnosed, with comorbidities, and receiving regular care (23.9%). Perinatal mental illness risk was elevated in all classes versus women without diabetes (adjusted relative risks: 1.09–1.12), but results for class 2 were nonsignificant after adjustment. Women with diabetes could benefit from preconception and perinatal strategies to reduce their mental illness risk.
Comparison of Zn accumulation and speciation in kernels of sweetcorn and maize differing in maturity
Authors: Cheah Zhong Xiang , Kopittke Peter M , Scheckel Kirk G , Noerpel Matthew R , Bell Michael J
Published: October 2019

Background and Aims

Understanding the speciation of Zn in edible portions of crops helps identify the most effective biofortification strategies to increase the supply of nutrients for improving the health and nutrition of consumers.

Methods

Kernels of 12 sweetcorn and three maize (Zea mays) varieties were analysed for Zn concentration and content. The speciation of the Zn in the embryos, endosperms and whole kernels at 21, 28 and 56 days after pollination (DAP) was then examined for one maize and one sweetcorn variety using synchrotron-based X-ray absorption spectroscopy (XAS).

Key Results

Averaged across all sweetcorn and maize varieties at 21 DAP, the embryo contributed 27–29% of the whole kernel Zn whilst the endosperm contributed 71–73 %. While sweetcorn embryos contributed a lower proportion to the total kernel Zn than those of maize, the proportion of total Zn in the embryo increased as kernels aged for both varieties, reaching 33 % for sweetcorn and 49% for maize at 28 DAP. Using XAS, it was predicted that an average of 90 % of the Zn in the embryos was present as Zn-phytate, while in the endosperm the Zn was primarily complexed with an N-containing ligand such as histidine and to a lesser extent with phytate. However, in maize endosperms, it was also observed that the proportion of Zn present as Zn-phytate increased as the kernel matured, thereby also probably decreasing its bioavailability in these mature maize kernels.

Conclusions

The apparent low bioavailability of Zn supplied in maize at its consumption stage (i.e. mature kernels) probably undermines the effectiveness of biofortification of this crop. Conversely, successful biofortification of Zn in sweetcorn and green maize consumed as immature kernels could potentially provide a good source of bioavailable Zn in human diets.
CRT intersectionality and non-profit collaboration: a critical reflection
Authors: Leach Kirk A , Crichlow Wesley
Published: October 2019

This article integrates a critical race (CRT) and intersectional conceptual lens to illuminate racial power dynamics when white-dominated non-profit organizations engage a collaborative strategy in communities of colour. Utilizing this integrated lens, we also critically assess our own positionality as researchers conducting community-based research in communities of colour. CRT and intersectionality broadens our explanatory power by providing the methodological tools – storytelling, critical autoethnography and narrative that illuminate the experiences of people of colour, and contradicts the majoritarian research narrative that dominates our understanding on non-profit collaborative strategy in communities of colour. Through this approach, we provide an insight and offer practical suggestions that enable a more just and inclusive community development praxis.
New archaeomagnetic secular variation data from Central Europe, I: Directions
Authors: Schnepp Elisabeth , Thallner Daniele , Arneitz Patrick , Mauritsch Hermann , Scholger Robert , Rolf Christian , Leonhardt Roman
Published: October 2019

Archaeomagnetic directions of one hundred and forty-one archaeological structures have been studied from 21 sites in Austria, 31 sites in Germany and one site in Switzerland. Characteristic remanent magnetisation directions obtained from alternating field and thermal demagnetisations provided 82 and 78 new or updated (12 and 10 per cent) directions of Austria and Germany, respectively. Nine of the directions are not reliable for certain reasons (e.g. displacement) while three of the features are not well dated. Apart from this some updated age information for the published databases is provided. Rock magnetic experiments revealed magnetite as main magnetic carrier of the remanences. The new data agree well with existing secular variation reference curves. The extended data set covers now the past 3500 years and a lot of progress were made to cover times BC with data. Here enhanced secular variation is observed manifested in declinations with values up to 70°. The new data will allow for recalculation of archaeomagnetic calibration curves for Central Europe from mid Bronze Age until today.
Resources in vulnerable young adults: self-assessments during preventive consultation with their general practitioner in Denmark
Authors: Freund Kirsten Schierup , Guassora Ann Dorrit , Hegelund Trine , Hvas Lotte , Lous Jørgen
Published: October 2019

Inequality in health is increasing. People with many problems often lack energy to improve well-being and reduce their problems. This study analyses how psycho-socially challenged younger (20- to 44-year-old) patients described their own resources to reach lifestyle goals or alter life circumstances. Within the context of a randomized controlled trial, Danish participants had two structured preventive person-centred consultations with their general practitioner. Consultations focused on well-being, salutogenesis, resources, barriers and support of autonomy. Using the qualitative method: Systematic Text Condensation, we made thematic cross-analysis of patients’ goal-specific resource statements described at the first consultation. Of the 209 patients, 191 (91%) chose one or two goals for a better life next year; nearly all (179) could recall and describe which resources they would use to reach their goal. We categorized resource statements into (i) personal constitution as ‘willpower’ and ‘tenacity’; (ii) network, e.g. family; (iii) personal experience with identical or similar problems. Some patients needed to free up resources by handling psychological problems before being able to focus on lifestyle goals. The study demonstrates that patients with particular psycho-social problems could describe essential resources in a structured, salutogenic, preventive consultation with their general practitioner. Reflecting intrinsic and extrinsic motivation, these resources reflected dimensions of essential health theories like sense of coherence, self-efficacy and self-determination theory. Increased awareness of these resources seems essential for vulnerable patients by improving psychological well-being and optimism, thereby facilitating health-related changes. This may be an important step to reducing inequality in health.
Methylation changes in the peripheral blood of filipinos with type 2 diabetes suggest spurious transcription initiation at TXNIP
Authors: Albao Dominic S , Cutiongco-de la Paz Eva Maria , Mercado Maria Elizabeth , Lirio Alvin , Mariano Margarette , Kim Sarah , Yangco Ariane , Melegrito Jodelyn , Wad-asen Kate , Gauran Iris Ivy , Francisco Marie Angeline , Santos-Acuin Cecilia , David-Padilla Carmencita , Murphy Elizabeth J , Paz-Pacheco Elizabeth , Seielstad Mark
Published: October 2019

While much work has been done in associating differentially methylated positions (DMPs) to type 2 diabetes (T2D) across different populations, not much attention has been placed on identifying its possible functional consequences. We explored methylation changes in the peripheral blood of Filipinos with T2D and identified 177 associated DMPs. Most of these DMPs were associated with genes involved in metabolism, inflammation and the cell cycle. Three of these DMPs map to the TXNIP gene body, replicating previous findings from epigenome-wide association studies (EWAS) of T2D. The TXNIP downmethylation coincided with increased transcription at the 3’-UTR, H3K36me3 histone markings, and Sp1 binding, suggesting spurious transcription initiation at the TXNIP 3’-UTR as a functional consequence of T2D methylation changes. We also explored potential epigenetic determinants to increased incidence of T2D in Filipino immigrants in the United States and found 3 DMPs associated with the interaction of T2D and immigration. Two of these DMPs were located near MAP 2 K7 and PRMT1, which may point towards dysregulated stress response and inflammation as a contributing factor to T2D among Filipino immigrants.
The active RS CVn-type system SZ Pictoris
Authors: Martínez C I , González J F , Buccino A , Ibañez Bustos R , Mauas P J D
Published: October 2019

We study the short-term variability and long-term variability of the spectroscopic binary SZ Pictoris, a southern RS CVn-type system. We used mid-resolution Echelle spectra obtained at Complejo Astronómico El Leoncito spanning 18 yr, and the photometric data from the All Sky Automated Survey data base (V band) and from the Optical Robotic Observatory (BVRI bands) for similar time lapses. We separated the composite spectra into those corresponding to both components, and we were able to determine accurate orbital parameters, in particular an orbital period of 4.95 d. We also observed a photometric modulation with half the orbital period, due to the ellipticity of the stars. We also found cyclic activity with a period of ∼2030 d, both in the photometry and in the Ca ii flux of the secondary star of the system.
Direct wide-field radio imaging in real-time at high time resolution using antenna electric fields
Authors: Kent James , Beardsley Adam P , Bester Landman , Gull Steve F , Nikolic Bojan , Dowell Jayce , Thyagarajan Nithyanandan , Taylor Greg B , Bowman Judd
Published: October 2019

The recent demonstration of a real-time direct imaging radio interferometry correlator represents a new capability in radio astronomy. However, wide-field imaging with this method is challenging since wide-field effects and array non-coplanarity degrade image quality if not compensated for. Here, we present an alternative direct imaging correlation strategy using a direct Fourier transform (DFT), modelled as a linear operator facilitating a matrix multiplication between the DFT matrix and a vector of the electric fields from each antenna. This offers perfect correction for wide field and non-coplanarity effects. When implemented with data from the Long Wavelength Array (LWA), it offers comparable computational performance to previously demonstrated direct imaging techniques, despite having a theoretically higher floating point cost. It also has additional benefits, such as imaging sparse arrays and control over which sky coordinates are imaged, allowing variable pixel placement across an image. It is in practice a highly flexible and efficient method of direct radio imaging when implemented on suitable arrays. A functioning electric field direct imaging architecture using the DFT is presented, alongside an exploration of techniques for wide-field imaging similar to those in visibility-based imaging, and an explanation of why they do not fit well to imaging directly with the digitized electric field data. The DFT imaging method is demonstrated on real data from the LWA telescope, alongside a detailed performance analysis, as well as an exploration of its applicability to other arrays.
Levinas and Løgstrup on the Phenomenology (and Metaphysics?) of Moral Agency
Authors: McMullin Irene
Published: October 2019

For both Levinas and Løgstrup, the moral encounter is characterized by an asymmetrical prioritization of the other over the self. Some take Løgstrup’s account to be an improvement on Levinas’s, however, insofar as it appears to both foreswear the hyperbole of the latter’s view and ground the ethical claim in the natural conditions of human life (thereby avoiding Levinas’s alleged nominalism). This paper argues, in contrast, that Løgstrup’s own account is equally hyperbolic in its characterization of the self as fundamentally evil, and that his attempt to ground the ethical demand in structures of ‘life’ raises serious difficulties. I will argue that Levinas’s stronger commitment to phenomenology both rules out the problematic metaphysical claims on which Løgstrup’s ontological ethics depends and helps explain the methodological function of Levinas’s own hyperbole. Unlike Løgstrup, Levinas insists that the challenge is not eradicating the claims of the self, but rather resisting its pretention to a global normative priority. In making this case I refute the argument that Levinas, unlike Løgstrup, is committed to a ‘command’ view of morality—whereby it is the other person’s authoritative status that underwrites the moral force of the claim, not the content of the claim itself. But on Levinas’s view, ‘demand’ and ‘command’ accounts merge in his understanding of the face-to-face encounter because responding to the content of the demand—that I treat the other’s claim as reason-giving—just is to see the other person as an authority capable of making legitimate claims on me.
Spillover effects of the Venezuelan crisis: migration impacts in Colombia
Authors: Caruso German , Canon Christian Gomez , Mueller Valerie
Published: October 2019

In the wake of the Venezuelan crisis, Colombian migrants are returning to their place of birth. Since 2016, however, there has been a spike of immigration to Colombia attributable to inflows of the Venezuelan-born. Using high-frequency administrative data, we estimate the impacts of the recent labour supply shock–driven by the economic predicament in Venezuela–on the labour and poverty outcomes of native Colombians. We employ an instrumental variables approach to account for the selection of immigrants into locations with more or less desirable conditions. A 1 percentage point increase in immigration from Venezuela reduces informal sector wages by 10 percentage points in urban areas. As the crisis increased the fraction of migrants by 0.2 percentage points in 2017, we estimate urban wages decreased by a total of 2 percentage points. A dual-pronged approach is warranted to promote the economic assimilation of Venezuelans while protecting the job security of Colombians.
Half-quantized non-Abelian vortices in neutron 3P2 superfluids inside magnetars
Authors: Masuda Kota , Nitta Muneto
Published: October 2019

We point out that half-quantized non-Abelian vortices exist as the minimum energy states in rotating neutron $^3P_2$ superfluids in the inner cores of magnetars with magnetic fields greater than $3 \times 10^{15}$ Gauss, while they do not in ordinary neutron stars with smaller magnetic fields. One integer vortex is split into two half-quantized vortices. The number of vortices is about $10^{19}$ and they are separated at about $\mu$m in a vortex lattice for typical parameters, while the vortex core size is about 10–100 fm. They are non-Abelian vortices characterized by a non-Abelian first homotopy group, and consequently when two vortices corresponding to non-commutative elements collide, a rung vortex must be created between them, implying the formation of an entangled vortex network inside the cores of magnetars. We find spontaneous magnetization in the vortex core showing diamagnetism whose typical magnitude is about $10^{8-9}$ Gauss, which is ten times larger than that of integer vortices, when external magnetic fields are present along the vortex line.
‘I am a Victorian!’: W. B. Yeats, Modern Manliness and the Problems of Work
Authors: Bland Botham Peter
Published: October 2019

Examining his writings up to 1909, this article argues that W. B. Yeats was drawn to a specifically modern notion of masculinity based on a material, athletic ideal of the male body, at odds with the more transcendent principles he otherwise professed and associated with the Renaissance. Moreover, he understood this corporeal archetype of manliness to be fashioned through everyday activities, such as work and sport, which are shown to shape his sense of gender in addition to more-oft examined aspects of his life, such as his occultism or relations with women. As a sedentary writer, however, Yeats struggled to embody the model of active Victorian manliness he idealized. Identifying such anxieties in his early poems and stories, this article traces Yeats’s efforts to reconceptualize his wearisome poetic toil as healthy, productive labour: namely, by assuming Thomas Carlyle’s notion of the writer as ascetic prophet, who cuts himself free from the propagandist verbiage of the mob to deliver a message that is physically potent in its radical sincerity. Rather than representing Yeats as a disembodied, heroic voice, speaking out of a patriarchal, Romantic tradition, this article depicts him as an anxiously masculine, late-Victorian man of letters, struggling with the expectations his own era placed upon the male body.
Association of lumbosacral transitional vertebra and sacroiliitis in patients with inflammatory back pain suggesting axial spondyloarthritis
Authors: Carvajal Alegria Guillermo , Voirin-Hertz Marie , Garrigues Florent , Herbette Marion , Deloire Lucile , Simon Alexandre , Feydy Antoine , Reijnierse Monique , van der Heijde Désirée , Marhadour Thierry , Saraux Alain
Published: October 2019

Objective

Lumbosacral transitional vertebras (LSTVs) are common in the general population, but their potential impact on the sacroiliac joints is unclear. We aimed to determine the prevalence of LSTVs and to assess their associations with sacroiliitis by standard radiography and MRI in a population with suspected axial spondyloarthritis.

Methods

The data were from the DESIR cohort of 688 patients aged 18–50 years with inflammatory low back pain for ⩾3 months but <3 years suggesting axial spondyloarthritis. The baseline pelvic radiographs were read by two blinded readers for the presence and type (Castellvi classification) of LSTVs. Associations between LSTVs and other variables collected at baseline and at the diagnosis were assessed using the χ2 test (or Fisher's exact test) or the Mann–Whitney test.

Results

LSTV was found in 200/688 (29.1%) patients. Castellvi type was Ia in 54 (7.8%), Ib in 76 (11.0%), IIa in 20 (2.9%), IIb in 12 (1.7%), IIIa in 7 (1.0%), IIIb in 21 (3.0%) and IV in 10 (1.4%) patients. Compared with the group without LSTVs, the group with LSTVs had higher proportions of patients meeting modified New York criteria for radiographic sacroiliitis (19% vs 27%, respectively; P = 0.013) and Assessment of SpondyloArthritis international Society MRI criteria for sacroiliitis (29% vs 39%, respectively; P = 0.019).

Conclusion

In patients with inflammatory back pain suggesting axial spondyloarthritis, LSTVs are associated with both radiographic and MRI sacroiliitis.
The impact of disease extent and severity detected by quantitative ultrasound analysis in the diagnosis and outcome of giant cell arteritis
Authors: Monti Sara , Ponte Cristina , Pereira Claudio , Manzoni Federica , Klersy Catherine , Rumi Federica , Carrara Greta , Hutchings Andrew , Schmidt Wolfgang A , Dasgupta Bhaskar , Caporali Roberto , Montecucco Carlomaurizio , Luqmani Raashid
Published: October 2019

Objectives

To develop a quantitative score based on colour duplex sonography (CDS) to predict the diagnosis and outcome of GCA.

Methods

We selected patients with positive CDS and confirmed diagnosis of GCA recruited into the TA Biopsy (TAB) vs Ultrasound in Diagnosis of GCA (TABUL) study and in a validation, independent cohort. We fitted four CDS models including combinations of the following: number and distribution of halos at the TA branches, average and maximum intima–media thickness of TA and axillary arteries. We fitted four clinical/laboratory models. The combined CDS and clinical models were used to develop a score to predict risk of positive TAB and clinical outcome at 6 months.

Results

We included 135 GCA patients from TABUL (female: 68%, age 73 (8) years) and 72 patients from the independent cohort (female: 46%, age 75 (7) years). The best-fitting CDS model for TAB used maximum intima–media thickness size and bilaterality of TA and axillary arteries’ halos. The best-fitting clinical model included raised inflammatory markers, PMR, headache and ischaemic symptoms. By combining CDS and clinical models we derived a score to compute the probability of a positive TAB. Model discrimination was fair (area under the receiver operating characteristic curve 0.77, 95% CI: 0.68, 0.84). No significant association was found for prediction of clinical outcome at 6 months.

Conclusion

A quantitative analysis of CDS and clinical characteristics is useful to identify patients with a positive biopsy, supporting the use of CDS as a surrogate tool to replace TAB. No predictive role was found for worse prognosis.
When Are Women as Corrupt as Men? Gender, Corruption, and Accountability in the UK Parliamentary Expenses Scandal
Authors: Waylen Georgina , Southern Rosalynd
Published: October 2019

Are women less corrupt than men? Although research reinforced this popular assumption, proposing more women in government to reduce corruption, recently scholars have challenged it. Analyzing the 2009 UK parliamentary expenses scandal using a gendered institutionalist approach, we show women office-holders’ propensity for corruption is context dependent. Male and female office-holders engage in similarly corrupt behavior when accountability is low. But subsequently when accountability is high, they respond to and are treated differently for perceived “wrong-doing.” Comparing low- and high-accountability contexts using in-depth case-study research shows how the relationship between corruption, accountability, and risk aversion is gendered.
Radon Exposures of Miners at Small Underground Construction Sites in Old Mining: Recommendations to Improve Radiation Protection Measures by the Saxon Radiation Protection Authority
Authors: Dehnert Jörg
Published: October 2019

The Ore Mountains (Erzgebirge) and Vogtland are low-mountain regions in the East German state of Saxony. Here, silver deposits were found in 1168. Mining began shortly after, continues at varying intensity to this day, and has left numerous galleries and shafts. Today, eight companies with about 250 miners carry out maintenance at more than 40 small and frequently changing underground construction sites throughout the year. Miners are protected against high radon exposure by radiation protection measures such as ventilations, stoppings made of wood, foil, and expanding foam, and staff rotations. However, some of them still show high annual exposure levels; for example, in 2015 up to 14.4 mSv measured by passive radon dosimeters. Reasons for this include the high radon potential in old mining and the natural density driven mine air current through the galleries. Mine air currents can change directions during the day depending on outdoor temperatures. This paper presents the experiences of the Saxon Radiation Protection Authority in monitoring miners in old mining. For this purpose, the paper looks at seven examples of miners’ critical exposures based on measurement curves of radon activity concentration and derives respective radiation protection measures. These encompass, for example, to activate mine fans, erect stoppings, extend ventilation pipes, and change the locations of mine fans. Conclusions are drawn for the operative and strategic radiation protection in old mining.
Specific Gamma-Ray Dose Constants with Current Emission Data
Authors: Peplow Douglas E.
Published: October 2019

The specific gamma-ray dose constant represents the gamma effective dose rate due to a point source of unit activity of a given nuclide at 1 m. New tabulations of specific gamma-ray dose constants have been made using current gamma emission data from the SCALE 6.2.3 software package and International Commission on Radiological Protection Publication 107, combined with the effective dose per fluence conversion coefficients (antero-posterior orientation) of International Commission on Radiological Protection Publication 116. SCALE data cover 1,264 nuclides, and International Commission on Radiological Protection Publication 107 data include 1,192 nuclides, with only 777 nuclides in common between the two sets.
Estimation of External Dose Rates to Hotel Workers from bed linens Contaminated by 131I Patients
Authors: Foreman C. , Dewji S.
Published: October 2019

Iodine-131 is commonly used in medical diagnosis and therapy for patients with hyperthyroidism or differentiated thyroid cancer. Following treatment, patients may recuperate in a hotel room to avoid exposing family members. The main purpose of this study was to estimate external effective dose rate coefficients to a hotel worker who handles potentially contaminated bed linens due to secretions from 131I patients as sweat or urine. The external dose rate estimates were derived using Monte Carlo radiation transport code and the phantom with movable arms and legs to model a housekeeper standing in an upright position holding a pile of bed linens. Simulations further integrated the body burden of time-dependent biokinetic metabolism of 131I in the patient’s body, differentiating between biokinetic excretion models of hyperthyroid vs. cancer patients. Organ absorbed dose rate and effective dose rate coefficients were calculated for three scenarios of bed linen contamination and estimated out to 5 d postadministration and compared to past 131I patient contamination measurements.
Re-Treatment by Flap Relift Versus Surface Ablation After Myopic Laser In Situ Keratomileusis
Authors: Hecht Idan , Mimouni Michael , Rabina Gilad , Kaiserman Igor
Published: October 2019

Purpose:

To compare clinical outcomes of patients undergoing first re-treatment by flap relift with those re-treated by surface ablation on the flap after an initial myopic laser-assisted in situ keratomileusis (LASIK) procedure.

Methods:

This is a retrospective cohort analysis of consecutive patients who underwent myopic LASIK and required re-treatment between January 2007 and December 2016. Cases re-treated by flap relift were propensity score matched with cases re-treated by surface ablation, and clinical outcomes were compared. One eye from each patient was included.

Results:

A total of 1,234 out of 21,191 cases required re-treatment after myopic LASIK during the follow-up period. Surface ablation was performed in 75% of cases and relift in 25%. Patients re-treated by surface ablation were more commonly male (61.8% vs. 48.1%, P < 0.001), were younger (33.2 ± 7.8 vs. 35.2 ± 10 years, P = 0.005), and had thinner corneas (483 ± 46 vs. 502 ± 43 μm, P < 0.001). Propensity score matching was performed for 416 eyes (208 from each group). After matching, differences in baseline characteristics became nonsignificant (P > 0.05). Cases re-treated by surface ablation had a worse safety index (0.98 ± 0.12 vs. 1.02 ± 0.17, P = 0.049), yet better predictability (0.14 ± 0.6 vs. 0.35 ± 0.5 diopters of deviation, P = 0.009), a similar efficacy index (0.92 ± 0.2 vs. 0.93 ± 0.3, P = 0.814), higher rates of haze (5.8% vs. 0.5%, P = 0.002), and a lower risk for epithelial ingrowth (0.5% vs. 8.2%, P < 0.001).

Conclusions:

Re-treatment after myopic LASIK with surface ablation resulted in worse safety and higher rates of haze, yet more predictable outcomes and reduced ingrowth rates, compared with re-treatment with flap relift.