bluuebunny/crossref_metadata_2025 huggingface dataset:
Surface modification to develop hierarchical micro/nano topography on titanium based medical implants
Authors: Strnad G , Jakab-Farkas L , Cazacu R , Russu O , Petrovan C
Published: October 2019

Self-organized nanostructured TiO2 layers were developed on micro rough planar, cylindrical, and threaded surfaces of Ti6Al4V alloy by electrochemical anodization (EA) performed in phosphate-fluoride solution (1M H3PO4 with different HF additions) by using different process parameters (electrolyte concentration, anodization potential U, potential ramp Ur, and sample rotational speed n). Optical microscopy and scanning electron microscopy (SEM) was used to evaluate the morphology of the oxide layers. Nanostructured oxide layers with nanotubes/nanopores internal diameter in 25-110 nm range were developed on surfaces with an initial micro rough topography (Ra = 0.5-2 µm, resulting by CNC turning or by sand blasting and acid etching - SLA). On planar surfaces, the optimal EA process parameters in our custom-built anodization cell are: 0.5 wt.% HF addition in electrolyte, U = 20 V, and Ur = 0.1 V/s - for turned surfaces, and 0.4 wt.% HF addition in electrolyte, U = 24 V, and Ur = 0.08 V/s - for SLA surfaces. For cylindrical surfaces the nanotubes were superimposed on micro rough surface by using 0.4 wt.% HF addition in electrolyte, U = 24 V, and Ur = 0.08 V/s. On threaded surfaces continuous nanoporous oxide layer covering all geometrical features-frontal apex, spiral channels, major diameter, minor diameter, thread flanks - was developed by using 0.4 wt.% HF addition in electrolyte, U = 24 V, Ur = 0.08 V/s, and n = 8 rev/min.
Survey on the kinematics of a 6RSS parallel robot based on manipulability indices
Authors: Milica L , Năstase A , Andrei G
Published: October 2019

The study of the kinematic performances of a parallel mechanisms an important aspect in terms of analysis and design. This paper presents a study on the kinematic manipulability and kinematic efficiency of a 6RSS parallel mechanism. The parallel mechanism consists of a fixed plate and a mobile platform connected by six independent kinematic chains. Each of the six kinematic chains has an actuated rotational joint and two spherical joints. The motion equations for the six kinematic chains of the parallel mechanism are defined when the characteristic point P moves on the spatial curve with constant speed. Based on the global Jacobian matrix determinant and the angular speeds of actuated arms was graphically represented the variation of the two kinematic indices. Kinematic indices allow for assessing the quality of the mechanism motion; they also help us avoid those critical configurations encountered in the case of parallel mechanisms.
Analyses and redesign of a technological device for automated assembly, using Design for Manufacturing and Assembly approach
Authors: Pișta I M , Nagîț G , Merticaru V , Rîpanu M I , Cucoș M
Published: October 2019

This paper aims to present a theoretical approach and a case study within a research upon product and process design methods in terms of manufacturing and assembly – supported by DFMA (Design for Manufacturing and Assembly) techniques. Application of the integrated design capabilities provided by DFMA approach is illustrated with a case study on the development of a technological device for automated assembly of an industrial electrical plug inlet. The analysis and redesign using DFMA philosophy and advanced 3D design capabilities provided by CATIA V5 is an advanced engineering method for designing an innovative product in order to simplify the product, to quantify improvements and to reduce manufacturing and assembly costs. The new design of the studied product has been compared with the existing one from the aspect of parts quantity, handling time, assembly time and design efficiency. Finally, the study presents also some related conclusions together with further research directions.
Personification of criterial resource validation and scientific and technical support for the life cycle of vertical transport
Authors: Prusov A , Sevryugina N , Ovsienko A
Published: October 2019

It has been proven that the vertical transport occupies a niche not so much technical objects, how many socially significant technological advances that provide comfort and accessibility for the population of different levels of mobility. Analysis of legal, regulatory documentation showed that the security and reliability of vertical transport is represented in the theory of risk as a scenario of possible events with a broad range of assumptions within the zone of progressing temporary uncertainty and coherence mechanism models of actual conditions (GOST r ISO 9000), in most cases, it is not. Evaluated scientific elaboration area studies in part integrity, functionality and consistency of the regulatory framework legal enforceability. The model of the complete life cycle of vertical transport. Algorithm of modal analysis of vertical transport parameters of criteria. Estimation of interference and strengthening process factors. Conducted simulation risk factor system the effects of vertical transport the negative socio-economic consequences. Proposed personalized predictive model of full life-cycle operation of vertical transport. Practical recommendations aimed at harmonizing the basic works on scientific and technical support and monitoring, simplification of the development programs of work, obtaining accurate and timely information on the state of vertical transport.
Making a device for forced crystallization in magnetic and electric environment
Authors: Mândrea L , Constantinescu C , Marosy Z
Published: October 2019

The Earth’s magnetic field is, besides its protective role, important in the biochemical structuring of the elements in the living, biological body. The permanent electric field that envelops the planet’s surface brings extra effervescence to life. The structure of different chemical and biochemical compositions is due to a cumulus of both magnetic and electric synchronous fields. In different parts of the globe there are different fields, and / or different angles of the field’s manifestation. These elements can or cannot bring about changes in the structuring of ionic, biological solutions, which the formed team intends to study. Making such an experimental device is difficult since magnetic and electrical field accuracy is required, as well as the smallest deviation possible produced by the surrounding equipment. The device will successfully simulate extreme areas found on Earth. The studies are a logical continuation of the experiments made beforehand, starting in 2010, which highlighted the structural changes that plants have when electrical and magnetic changes occur in the environment. The device is part of a project of the National Committee on Antarctic Research, supported by the Romanian Academy; part of the Strategic Plan for Antarctic Research 2016-2020, 4. Thematic Area - Frontier Science: Antarctica - Terrestrial Analogue for Outer Space.
Hydrothermal liquefaction of microalgae for biofuel production: the recycling of nutrients from an aqueous solution after HTL
Authors: Chernova N I , Kiseleva S V , Vlaskin M S , Grigorenko A V , Rafikova Y Y
Published: October 2019

Microalgae are an alternative source for the renewable biofuels production. One of the promising technologies of microalgae fuel production is the hydrothermal liquefaction (HTL) with obtaining bio-oil as the target product. We have carried out a number of experiments on the hydrothermal liquefaction the biomass of blue-green microalgae Arthrospira platensis rsemsu
1/02-P (collection of Renewable Source Energy Laboratory at Lomonosov Moscow State University). For the HTL of arthrospira biomass the reactor of the Institute of High Temperatures RAS have been used. The outputs of bio-oil, gaseous products, solid residue and aqueous solution were 34-46%, 12-18%, 26-30%, 10-24% respectively. The aqueous solution hydrothermal liquefaction is a by-product, it has a limited energy value and needs to be recycled. Aqueous solution contains the nutrients necessary for growing algae but in quantities that are orders of magnitude higher than the standard ones. Studies growth of different algae species in aqueous solution after HTL have shown that in order to prevent the growth inhibitors toxic effect intensive its dilution is necessary. Microalgae strains, which can be cultivated in 500-fold diluted aqueous solution (Galdieria sulphuraria rsemsu G-1, Chlorella vulgaris rsemsu Chv-20/11-Ps), have been experimentally selected. It allows partially recycling the by-product of bio-oil from microalgae
Mathematical modelling of the spatial efficiency of car parks
Authors: Boroiu A , Neagu E , Boroiu A A , Vieru I
Published: October 2019

One of the major urban concerns is the lack of parking places. The most appropriate indicator for assessing the spatial efficiency of the car parks is the unit surface. The largest space-saving resources to improve spatial efficiency belong to the large car parks in the distinct situations: for employees of a large company or for hypermarket customers. As a result, a mathematical model for access to the parking place by means of a single steering manoeuvre has been constructed, having the angle of inclination of the parking spaces as variable and the 95% percentiles corresponding to the overall current dimensions of the cars as parameters. In the case of customer parking, it was considered that it is necessary for the customers to have access to the trunk to pick up the purchased items from the shopping cart, so a specific arrangement of the vehicles on the parking places is required. The results confirmed the superiority, from the point of view of spatial efficiency, of the angled car parks as compared to the rectangular car parks. For the car parks angled at 45° - 60° it has been demonstrated that increases of more than 10% over rectangular parking spaces are achieved.
The potential of roofs in city centers to be used for photovoltaic micro-installations
Authors: Suszanowicz D , Ratuszny P , Wróbel R
Published: October 2019

Currently in Poland, power engineering based on hard coal and lignite plays the dominant role. This significantly impedes the attainment of 15% share of energy produced from renewable sources by 2020 and has a negative impact on air quality in Poland. A solution to this unfavourable situation may be to develop renewable dispersed energy with particular emphasis on installations using photovoltaic. Strongly urbanized areas have high electricity demand, and at the same time low availability of areas where it is possible to locate renewable energy sources. In this study, the possibility of using roofs of buildings in city centres for the purpose of photovoltaic micro-installation was analysed. A case study was carried out for two selected districts of the city of Opole. Opole has sunshine conditions which are representative for Poland. The analysis of photovoltaic potential of roofs in urbanised areas was carried out using geographical information systems (GIS). The analysis showed a high photovoltaic potential of the two selected districts of Opole: the potential to generate locally almost 25% of the electrical energy required. The proposed method of determining the photovoltaic potential of roofs in city centres can be used in Polish conditions, as well as in Central Europe.
Technical potential of crop production wastes as energy resource for agricultural regions of Russia
Authors: Tulegenova A A , Andreenko T I , Rafikova Y
Published: October 2019

The use of woody biomass obtained from pruning and removal of perennial agricultural plantations for energy needs is a relatively new direction, which is now actively explored and developed in Europe. In Russia, horticulture and viticulture is also a traditional direction of agriculture in the southern regions, in particular, in the Republic of Dagestan. Dagestan is a volatile region with a variety of problems in the fuel and energy complex. The solution to these problems may become the use of renewable energy resources in the region. The paper presents the methodology for assessment of bioenergy resources in the region with the use of spatial analysis. The main purpose is to determine the optimal economically and technologically available energy technology for the estimated energy resource. The results show the high importance of social and economic factors for the development of renewable energy in the region, which is not typical for the other regions of Russia and should be taken into account in the further development of the methodology of multi-stage bioenergy resource assessment.
Developers’ perception of cost drivers influencing project cost performance on Surabaya high-rise residential, Indonesia
Authors: Chicoca D , Utomo C
Published: October 2019

Good cost performance is one of the fundamental criteria of a successful project. The major challenges developers have in this process is to balance the budget and project cost performance. Most of the scholars agreed that the construction indu stry in any country is complex because it involves a broad range of stakeholders and has wide-ranging linkages with other areas. Some of these factors are also unknown at the project level, which create difficulty for project managers to assign a favourable contingency cost. Therefore, this work came to establish factors influencing project cost performance of high-rise residential development through macro indicators based on developer’s perspective. It sought to identify these factors in an effort to shed more light on how cost drivers affect project cost performance. From the study findings, there are seven cost drivers. These drivers are analysed based on significance and impact using multiple regression analysis. The top most in terms of significance are property market and construction industry, project characteristic factor, socio economic factor and project component costs factor. The least one out of the seven factors is the statuary regulation factor. In relation to impact, project stakeholder factor has the highest impact, followed by the property market and construction industry, project characteristic factor and project component costs factor. The least one is socio economic factors.
Risk analysis of traffic congestion due to problem in heavy vehicles: a concept
Authors: Kesuma P A , Rohman M A , Prastyanto C A
Published: October 2019

One of the most common problems on roads is traffic congestion caused by problems with heavy vehicles (e.g. trucks, trailers). The consequences of this problem often harm the wider community, both in material and non-material forms such as fuel waste and loss of time. Several previous studies have tried to look for factors that cause traffic congestion, but it has not been able to provide a complete understanding of the root causes and who are the stakeholders who must have an important role in solving this problem. This study aims to develop a research framework to get more better understanding about congestion caused by problems with heavy vehicles, which can be categorized as a type of non-recurrent congestion (NRC) that is dynamic and unpredictable. Risk management prioritizes a proactive approach before an event occurs, so the impact of risk can be minimized. Probability and Impact Matrix techniques are used to determine risk priority. Furthermore, to find the root causes of traffic congestion problems, the Fault Tree Analysis (FTA) method and Social Network Analysis (SNA) are considered to be quite potential to be used to describe complex patterns of relationships among stakeholders. The results of this study are expected to provide more complete information to understand the problem of congestion due to the problem of heavy vehicles, so that a more comprehensive solution can be formulated.
Near zero energy house design parameter implementation in cluster housing – a case study
Authors: Latief Y , Berawi M A , Supriadi L S R , Koesalamwardi A B , Herzanita A
Published: October 2019

The sustainable concept of housing supports a house in reducing the dependence on fossil-based energy. The environmental impact of a housing building, particularly CO2 emissions, depends on the house overall design, including site planning, configuration, materials, construction, and operation where every aspect affected the house environmental performance. Nature has provide sufficient energy to tropical climate environment like Indonesia. Nevertheless, economically viable cluster housing is the other issue that encounter high costs housing from energy efficient building such as the Near Zero Energy House (nZEH) due to high price of materials and equipment used. The objective of the research is to understand how nZEH design parameter has been implemented and give impacts on architectural form of housing design. Methods used in this study is qualitative approach using research instruments among others: checklist, interview form and observation log book. From the case study conducted in this research, it was found that the object, the cluster design housing, are poorly incorporate the nZEH design parameter due to costly reasoning that impact to initial cost of the housing building. Among the design parameter which has been suggested are limited to passive design, fenestration, HVAC, lighting, and minor consideration to operation and maintenance.
Lean and sustainable construction: link between the sustainability report disclosure and the impact on profitable opportunities for investors
Authors: Kresnanto N C , Putri W H
Published: October 2019

Lean management in the construction sector is a company-driven movement to gain various advantages in running the business process. By implementing lean management, the company is simultaneously able to achieve multiple goals, such as profit maximization, while being able to eliminate non-value added activities and improve its environmental and social performance. To communicate these activities, the company issues a sustainability report, whose quality of disclosure depends on what the company has done with its business processes. This study tries to examine whether the quality of disclosures in sustainability reports has been able to contribute to influencing the number of earnings per share, which in this case is essential information for investors to see opportunities for profitability. The findings of this study indicate that, overall, disclosures in sustainability reports have not been a critical reference for investors, especially in looking at their profitability opportunities, and they only position this sustainability report as an additional source of information to ensure their concerns about social and environmental responsibility. The implication of this research for the development of sustainable construction is that it functions as a note to increase stakeholder engagement, especially investors, so that they appreciate the efforts of management to achieve competitive advantages and not only profit oriented.
Improving measureable external factors influence on construction project duration estimation
Authors: Anondho B , Latief Y , Mochtar K
Published: October 2019

The purpose of this study was to determine whether the use of building function variables as dummy variables affected the duration of construction projects, together with identified measureable external factors. Multivariate regression is a technique that estimates a single regression model with more than one outcome variable. When there is more than one predictor variable in a multivariate regression model, the model is a multivariate multiple regression. Goodness of Fit (R2) of the equation regression analysist used as sensibility benchmarks. Variables are transformed to index number for unit synchronize. If the result is unsatisfied for predicting a project duration, an implementation of dummy variables could be tried if there any improvement of R2. The trial on this research, 43 data show that in first stage, five influence factors: Education Index, Technology Absorption Index, Labor Experience Index, New Technology Availability Index, and Innovation Index generate regression equation without full fill the mathematical requirement. At the second stage, by adding dummy variables based on type of building, apartment, office, hotel and other then the three type together with the five external factors, afford a good R2.
Numerical study of two low rise eccentrically braced steel frames under Indonesia seismic load using ELM and DAM
Authors: Purnomo H , Orientilize M , Rahim S A , Priyadi A Y
Published: October 2019

Indonesia steel design code 2002 was revised in 2015. The latest version refers to AISC 360-10 which convert steel stability analysis to direct analysis method (DAM). DAM is an elastic analysis which includes second-order effect where P-delta and geometric imperfection are directly calculated during the analysis. Imperfection is modelled as notional load applied horizontally which is determined as 0.002 of gravity load. Numerical study using SAP software had been conducted to compare DAM and the previous method ELM on eccentrically braced frames (EBFs) under seismic load. It is known that EBF is one of earthquake resistant structural systems of steel structure. Numerical study was validated against experimental results performed by other researchers. Similar EBF frames used in the experiment were reanalyzed by ELM and DAM and coefficient of notional load is varied as 0.002 and 0.003. Seismic load applied in the analysis were varied based on three different seismic zones and soil conditions.
Shear capacity of fiber-reinforced concrete beams without transverse reinforcement
Authors: Widjaja Wong , Christianto Daniel , Kurniadi Dennis , Monica Lucyana , Yuliana  , Michelle
Published: October 2019

This study studied the effect of using fiber on the shear strength of concrete beams without transverse reinforcement. The concrete mixture does not use coarse aggregate and uses stainless steel fiber with a diameter of 0.2 mm and a length of 36 mm. This study explains the effect of concrete quality on shear strength that can be carried by concrete beams with a ratio of 45 / 10.5, 25 / 10.5 and 20 / 10.5. The making of test specimens in this study was a beam of varying lengths of 110 cm, 70 cm and 60 cm while a width of 7 cm, and a height of 12.5 cm. From the test results, the shear stress value is calculated using the formula v / (b x d x √ (fc)) > 2 in international units, in which the shear capacity value is bigger than the code states. Diagonal tension failure occurs on 110cm beam and shear tension failure on 70 cm and 60 cm beams.
Rapid Visual Screening (RVS) for School Buildings after Earthquake in Lombok, West Nusa Tenggara, Indonesia
Authors: Pujianto A , Prayuda H , Rosyidi S A P , Monika F , Faizah R
Published: October 2019

This study discusses the results of the rapid assessment of school buildings in Lombok after an earthquake occurs. The earthquake in July 2018 with a high enough intensity caused a lot of damage to the building. The earthquake including the school building affected the entire area of Lombok Island. This study assessed 15 school buildings on Lombok Island. School samples were taken randomly from several districts that were rocked by the earthquake. The results showed that school buildings in all locations were part of a Non-Engineered Building where there were no results of analysis of earthquake resistant buildings. Overall, the condition of the building is categorized as being moderately damaged with non-structural components such as walls not having good connections with columns and beams. In addition, the structure and attributes of the roof are also damaged by a high percentage. In some buildings, it still does not follow good structural rules so that it is very dangerous for building users in the event of a large earthquake. Improvements using the retrofitting method are one of the most recommended ways to improve the performance of buildings that have mild and moderate damage.
The Properties of Waste Rubber Tires in Increasing the Damping of Masonry Wall Structure
Authors: Faizah R , Priyosulistyo H , Aminullah A
Published: October 2019

The accumulation of waste rubber tires causes environmental problems, due to most of them cannot be recycled into new tires. Recently, this waste is gradually used as a material replacement in civil engineering such as in increasing damping properties. This study investigates the physical and mechanical properties of waste rubber tires including density (ρ), ultimate tensile strength (σ), elongation at break, hardness (Shore A), modulus of elasticity (E), and shear modulus (G). The specimens used were coded as A, B, C, and D to represent specified brand name. The testing method referred to ISO standards and was carried out in the laboratory of Center for Leather, Rubber, and Plastics (CLRP), and the structural laboratory of Department of Civil Engineering and Environmental, Gadjah Mada University, Yogyakarta, Indonesia. The result shows that the density of all brands is nearly the same which is around 1.1 gr/cm3. The A rubber tire is indicated as the best damping properties since it has the lowest value on tensile strength, hardness, modulus of elasticity and shear modulus. However, the elongation at break is the highest value, compared to the other specimens. B rubber tire shows hard rubber, while C and D are high strength rubber. Therefore, B, C, and D rubber tires are appropriate to be used as barrier supports which must be able to withstand large forces, while the damping is not a priority.
A joint choice decision model of intra-household interaction-based motorcycle mode and departure time in Yogyakarta, Indonesia
Authors: Irawan Muhammad Zudhy
Published: October 2019

The motorcycle-based joint trip between family members in a household becomes a common phenomenon in responding to unreliable public transport. This study aims to model the joint choice decision between intra-household interaction-based joint trip using motorcycle and departure time. With the data collected from 416 workers using the motorcycles in Yogyakarta, Indonesia, a cross-nested logit model was developed to explore the individual and household characteristics, work-and travel-related characteristics influencing household-based joint trip and departure time. The model result reveals that motorcyclists are more likely to change their departure time rather than an intra-household-based joint trip. Motorcyclists departing on a peak hour have a lower elasticity due to the alteration of travel time and travel cost than motorcyclists leaving on an off-peak hour. In a case of the off-peak departure time, motorcyclists leaving home to work by driving alone are more elastic for a change of travel cost than motorcyclists departing to work with their family member.
Road Planning for Improvement of reinforced concrete at PT. Krakatau Bandar Samudra Cilegon-Banten Province
Authors: Rosdiyani T , Noor Gunawan , Dindin dan
Published: October 2019

Road hardening is one of the elements of highway construction that is very important for smooth land transportation so as to provide comfort and safety for its users. The development of the economic and industrial sectors has increased, therefore the need for road transport facilities and infrastructure has increased and the development in PT. Krakatau Bandar Samudra, therefore the need for road repairs. Flexible hardening until rigid hardening, is expected to help improve surfing transportation services for the community and industry, so it needs to be well planned based on planning standards and applicable criteria in Indonesia. The method used in this planning uses Bina Marga T-14-2003, this plan includes to determine the thickness, dowel test diameter used and the dimensions of the drainage channel. In this planning requires primary and secondary data. Secondary data is obtained from the Public Works Agency in the form of location maps, previous technical specifications of data, and land data while the primary data is in the form of Average daily traffic data. The results of the analysis carried out obtained by the thickness of the concrete plate using Continuous Concrete Without Strengthening, the dowel test diameter and drainage channel dimensions that have fulfilled the requirements of safe numbers.
The Overloading Effect on the Design Life of Road and Thickness of Pavement Layer
Authors: Rahmawati A , Adly E , Lutfiyanto I , A Syifa M
Published: October 2019

Solo-Yogyakarta KM 9-15 Road is the national highway, which supports the traffic of goods and services, but many passing goods transport vehicles do not match the allowable load. As a consequently, the damage on the pavement occurred. Therefore, this study aims was to know the effect of overloading on design life and pavement thickness. This study used the method of Binamarga to analyze the effect of pavement thickness caused by overloading. The analysis was carried out by using the formula of design life decreasing with the value of Cumulative Equivalent Standard Axle (CESA) for overloading and standard load. Based on the 2013 Binamarga method, the design life is reduced by about eight years, from the previously determined is 20 years. Moreover, based on the analysis on pavement thickness of 20 years design life for a standard load, it showed that pavement thickness is needed for total surface layer is 100 mm consist of AC WC 40 mm and AC BC 60 mm. In addition, the base course layer is 145 mm (AC Base), and the subbase course layer is 300 mm (LPA Kelas A). At the same time, for overloading, the analysis result showed that it was required the pavement thickness for the surface layer is 100 mm, the base course layer is 180 mm, and the subbase course layer is 300 mm. These results indicate that overloading causes a reduction in the design life of the pavement and an increase in the thickness of the pavement.
Computational analysis to study the effect of infusion of Tetracyanoquinodimethane in zinc based metal-organic framework
Authors: Kumar Virendra , Kaur Harmeet , Tankeshwar K , Deep Akash
Published: October 2019

The present study reports the computational analysis of band structures and density of state (DOS) profiles of a Tetracyanoquinodimethane (TCNQ) infused IRMOF-1 (Iso Reticular Metal-Organic Framework-1). IRMOF-1 is a zinc-based MOF and has been reported useful in literature for a variety of applications, including gas storage and sensing owing to its highly porous structure. We have adopted a SIESTA based computational investigation approach to investigate the tuning of the band structure and DOS of IRMOF-1 via the infusion of a redox active species, i.e., TCNQ. The results have highlighted that the doping of TCNQ in IRMOF-1 is useful for the realization of a novel material with an estimated band gap of 4.35 eV. The necessary computational steps involved various optimization steps, such as the optimization of mesh-cutoff, lattice constant, lattice volume, and conjugate gradient. These computation studies have thus established that an approach of doping IRMOF-1 with TCNQ can result in the development of a suitably functional porous material that can be further exploited as an ultrawide‐bandgap semiconductor material or for the electrochemical sensing of different analytes, such as gases.
The quasiconformal equivalence of Riemann surfaces and the universal Schottky space
Authors: Shiga Hiroshige
Published: October 2019

In the theory of Teichmüller space of Riemann surfaces, we consider the set of Riemann surfaces which are quasiconformally equivalent. For topologically finite Riemann surfaces, it is quite easy to examine if they are quasiconformally equivalent or not. On the other hand, for Riemann surfaces of topologically infinite-type, the situation is rather complicated.

In this paper, after constructing an example which shows the complexity of the problem, we give some geometric conditions for Riemann surfaces to be quasiconformally equivalent.

Our argument enables us to obtain a universal property of the deformation spaces of Schottky regions, which is analogous to the fact that the universal Teichmüller space contains all Teichmüller spaces.
Strongly anisotropic type II blow up at an isolated point
Authors: Collot Charles , Merle Frank , Raphaël Pierre
Published: October 2019

We consider the energy supercriticald+1d+1-dimensional semi-linear heat equation<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="partial-differential Subscript t Baseline u equals normal upper Delta u plus u Superscript p Baseline comma x element-of double-struck upper R Superscript d plus 1 Baseline comma p greater-than-or-equal-to 3 comma d greater-than-or-equal-to 14 period">∂tu=Δu+up,  x∈Rd+1,  p≥3, d≥14.\begin{equation*} \partial _tu=\Delta u+u^{p}, \ \ x\in \Bbb R^{d+1}, \ \ p\geq 3, \ d\geq 14. \end{equation*}A fundamental open problem on this canonical nonlinear model is to understand the possible blow-up profiles appearing after renormalisation of a singularity. We exhibit in this paper a new scenario corresponding to the first example of a strongly anisotropic blow-up bubble: the solution displays a completely different behaviour depending on the considered direction in space. A fundamental step of the analysis is to solve thereconnection problemin order to produce finite energy solutions which is the heart of the matter. The corresponding anistropic mechanism is expected to be of fundamental importance in other settings in particular in fluid mechanics. The proof relies on a new functional framework for the construction and stabilisation of type II bubbles in the parabolic setting using energy estimates only, and allows us to exhibit new unexpected blow-up speeds.
Interval criteria for oscillation of second-order self-adjoint impulsive differential equations
Authors: Sugie Jitsuro
Published: October 2019

In this paper, oscillation theorems are given for second-order self-adjoint impulsive differential equations. The obtained results extend the well-known Kamenev-type and Philos-type oscillation theorems. A generalized Riccati transformation is used to prove these results. There are two advantages of using the generalized Riccati transformation rather than the standard Riccati transformation. One is that Kamenev-type and Philos-type oscillation theorems cannot be applied to conditionally oscillatory differential equations such as Euler’s equations, but the obtained results can be applied even to such equations. The other advantage is the ability to prove that the impulsive differential equation may become oscillatory even if the total impulse is small. A specific example is included to demonstrate the merits of the results obtained.
Maximal restriction estimates and the maximal function of the Fourier transform
Authors: Ramos João
Published: October 2019

We prove inequalities concerning the restriction of the strong maximal function of the Fourier transform to the circle, providing an answer to a question left open by Müller, Ricci, and Wright. We employ methods similar in spirit to the classical proofs of the two-dimensional restriction theorem, with the addition of a suitable trick to help us linearise our maximal function. In the end, we comment on how to use the same linearisation trick in combination with Vitturi’s duality argument to obtain sharper high-dimensional results for the Hardy–Littlewood maximal function.
Locally removable singularities for Kähler metrics with constant holomorphic sectional curvature
Authors: Gong Si-en , Liu Hongyi , Xu Bin
Published: October 2019

Let

n
≥
2

n\ge 2

be an integer, and let

B

n

⊂

C

n

B^{n}\subset \mathbb {C}^{n}

be the unit ball. Let

K
⊂

B

n

K\subset B^{n}

be a compact subset such that

B
n

∖
K

B^n\setminus K

is connected, or

K
=
{
z
=
(

z
1

,
…
,

z
n

)

|

z
1

=

z
2

=
0
}
⊂

C

n

K=\{z=(z_1,\ldots , z_n)|z_1=z_2=0\}\subset \mathbb {C}^{n}

. By the theory of developing maps, we prove that a Kähler metric on

B

n

∖
K

B^{n}\setminus K

with constant holomorphic sectional curvature uniquely extends to

B

n

B^{n}

.
A remark on partial data inverse problems for semilinear elliptic equations
Authors: Krupchyk Katya , Uhlmann Gunther
Published: October 2019

We show that the knowledge of the Dirichlet-to-Neumann map on an arbitrary open portion of the boundary of a domain in

R

n

\mathbb {R}^n

,

n
≥
2

n\ge 2

, for a class of semilinear elliptic equations uniquely determines the nonlinearity.
A remark on geodesics in the Banach-Mazur distance
Authors: Arias Alvaro , Kovalchuk Vladimir
Published: October 2019

We show that there are uncountably many geodesics between any two non-isometric

n
n

-dimensional normed spaces. We construct two explicit geodesics that can be used to describe all the points of the other geodesics.
A note on mappings preserving harmonic measure
Authors: Pouliasis Stamatis , Solynin Alexander
Published: October 2019

In this note we study mappings

f
f

preserving harmonic measures of boundary sets. We show that every homeomorphism

f
:

D
¯

→

Ω
¯

f:\overline {D}\to \overline {\Omega }

between Greenian domains

D
D

and

Ω
\Omega

in

R

n

\mathbb {R}^n

,

n
≥
2

n\ge 2

, preserving harmonic measures, is a harmonic morphism. We also study problems on conformality of mappings preserving harmonic measures of some specific sets on the boundaries of planar domains.
Indecomposable 0-Hecke modules for extended Schur functions
Authors: Searles Dominic
Published: October 2019

The extended Schur functions form a basis of quasisymmetric functions that contains the Schur functions. We provide a representation-theoretic interpretation of this basis by constructing

0
0

-Hecke modules whose quasisymmetric characteristics are the extended Schur functions. We further prove these modules are indecomposable.
On the density of multivariate polynomials with varying weights
Authors: Kroó András , Szabados József
Published: October 2019

In this paper we consider multivariate approximation by weighted polynomials of the form

w

γ
n

(

x

)

p
n

(

x

)

w^{\gamma _n}(\mathbf {x})p_n(\mathbf {x})

, where

p
n

p_n

is a multivariate polynomial of degree at most

n
n

,

w
w

is a given nonnegative weight with nonempty zero set, and

γ
n

↑
∞

\gamma _n\uparrow \infty

. We study the question if every continuous function vanishing on the zero set of

w
w

is a uniform limit of weighted polynomials

w

γ
n

(

x

)

p
n

(

x

)

w^{\gamma _n}(\mathbf {x})p_n(\mathbf {x})

. It turns out that for various classes of weights in order for this approximation property to hold it is necessary and sufficient that

γ
n

=
o
(
n
)
.

\gamma _n=o(n).
Lyubeznik numbers of irreducible projective varieties depend on the embedding
Authors: Wang Botong
Published: October 2019

We construct irreducible complex projective varieties such that the Lyubeznik numbers of their affine cones depend on the choices of projective embeddings. The main ingredient is the recent work of Reichelt-Saito-Walther, where the Lyubeznik numbers are reinterpreted using perverse sheaves and reducible projective varieties with dependent Lyubeznik numbers are constructed.
Convexity, critical points, and connectivity radius
Authors: Katz Mikhail
Published: October 2019

We study the level sets of the distance function from a boundary point of a convex set in Euclidean space. We provide a lower bound for the range of connectivity of the level sets in terms of the critical points of the distance function in the sense of Grove–Shiohama–Gromov–Cheeger.
Pointwise equidistribution for one parameter diagonalizable group action on homogeneous space
Authors: Shi Ronggang
Published: October 2019

Let

Γ
\Gamma

be a lattice of a semisimple Lie group

L
L

. Suppose that a one parameter

Ad
\operatorname {Ad}

-diagonalizable subgroup

{

g
t

}

\{g_t\}

of

L
L

acts ergodically on

L

/

Γ

L/\Gamma

with respect to the probability Haar measure

μ
\mu

. For certain proper subgroup

U
U

of the unstable horospherical subgroup of

{

g
t

}

\{g_t\}

and certain

x
∈
L

/

Γ

x\in L/\Gamma

we show that for almost every

u
∈
U

u\in U

the trajectory

{

g
t

u
x
:
0
≤
t
≤
T
}

\{g_tux: 0\le t\le T\}

is equidistributed with respect to

μ
\mu

as

T
→
∞

T\to \infty

.
Anthropology in Consumer Research
Authors: McCabe Maryann , Denny Rita
Published: October 2019

Consumer research, an emergent field in applied anthropology, examines relationships between producers and consumers as mediated by the marketplace. The anthropological purpose of consumer research is to discover cultural meanings of products and services in people’s everyday lives and to identify societal practices and discourses that inform and perform these meanings. While consumer research is inspired by and draws on traditional anthropological theory, it has also made theoretical contributions to anthropology, including consumption practices as crafting identity, consumption activities generating and maintaining social relationships, and the transformative power of consumer goods instigating cultural change.

Anthropologists engaged in consumer research work in three primary areas: (1) market-making to assist organizations in defining the environments in which they operate; (2) branding to differentiate an organization’s products and services from those of competitors by attaching to the brand a symbolic meaning from the lived experience of consumers; and (3) innovation to guide business growth by analyzing consumer practices, as well as client and other stakeholder suppositions about the nature of the problem to be solved. Anthropologists in consumer research not only represent consumer voices but are also mediators of stakeholder interests. Change occurs at minimal scale by reframing problems for clients and affecting how clients address target audiences through marketing and advertising strategies, communications, or innovation; and at broader scale, by simultaneously contesting cultural ideologies (e.g., gender, personhood, ethnicity) perpetuated by business practices.
Immunohistochemical Assessment of the Diagnostic Utility of PD-L1 (Clone SP142) for Methotrexate-Associated Lymphoproliferative Disorders With an Emphasis of Neoplastic PD-L1 (Clone SP142)–Positive Classic Hodgkin Lymphoma Type
Authors: Kohno Kei , Suzuki Yuka , Elsayed Ahmed A , Sakakibara Ayako , Takahara Taishi , Satou Akira , Kato Seiichi , Nakamura Shigeo , Asano Naoko
Published: October 2019

Objectives

We describe results of programmed death ligand 1 (PD-L1) immunohistochemical assessment in methotrexate (MTX)–associated lymphoproliferative disorders (LPDs) and highlight the characteristics of classic Hodgkin lymphoma (CHL) type MTX-LPD.

Methods

Fifty cases of MTX-LPD, including CHL type (n = 9), diffuse large B-cell lymphoma type (n = 15), and polymorphic B-cell LPD (n = 21), were investigated.

Results

Staining with anti–PD-L1 clone SP142 was exclusively found in CHL type (89%) but not in the others. Cases of CHL type MTX-LPD involved nodal disease and were associated with Epstein-Barr virus. They were histopathologically characterized by a vaguely nodular pattern, predominance of mononuclear cells, and strong expression of at least one pan–B-cell marker. Their clinical course was variable, with spontaneous regression in 5 patients, relapse in 2, and a fatal course in 1.

Conclusions

The PD-L1 (clone SP142) workup aids the diagnostic approach to patients with MTX-LPD. CHL type MTX-LPD appears to represent a unique morphologic variant of CHL.
The Dynamic Relationship Between Asthma and Obesity in Schoolchildren
Authors: Zhang Yue , Chen Zhanghua , Berhane Kiros , Urman Robert , Chatzi Vaia Lida , Breton Carrie , Gilliland Frank D
Published: October 2019

Asthma and obesity are among the most prevalent chronic health conditions in children. Although there has been compelling evidence of co-occurrence of asthma and obesity, it is uncertain whether asthma contributes to the development of obesity or obesity contributes to the onset of asthma or both. In this study, we used a joint transition modeling approach with cross-lagged structure to understand how asthma and obesity influence each other dynamically over time. Subjects for this study included 5,193 kindergarten and first-grade students enrolled from 13 communities in 2002–2003 in the Southern California Children’s Health Study, with up to 10 years of follow-up. We found that nonobese children with diagnosed asthma at a study visit were at 37% higher odds of becoming obese by the next annual visit compared with children without asthma (odds ratio = 1.38; 95% credible interval: 1.12, 1.71). However, the presence of obesity at the current visit was not statistically significantly associated with asthma onset in the next visit (odds ratio = 1.25; 95% credible interval: 0.94, 1.62). In conclusion, childhood asthma appears to drive an increase in the onset of obesity among schoolchildren, while the onset of obesity does not necessarily imply the future onset of asthma, at least in the short term.
Establishing an investigational drugs and research residency at an academic medical center
Authors: Wascher Molly , Mighty Janet , Brown Victoria , Ashby Daniel , Rudek Michelle A , Nesbit Todd , DeLisa Anne , Walker Cathy , Tolan Meghan
Published: October 2019

Purpose

The development, structure, and implementation of an innovative residency program designed to help meet a growing need for pharmacists with specialized expertise in investigational drug use and clinical research are described.

Clinical research has become an increasingly complex field, but prior to 2017 there were no U.S. specialty residency training programs focused on pharmacists’ role in drug development and the care of patients enrolled in clinical trials. In 2016 Johns Hopkins Hospital (JHH) launched an initiative to develop residency training standards specific to the areas of investigational drug use and clinical research. The residency development process consisted of creation of a residency development committee; a needs assessment, including formation of a diverse panel of internal and external experts to guide identification of key competency areas and development of residency goals and objectives; design of the program’s structure, including a framework for required and elective rotations; submission of an application for pre-candidate status to the ASHP Commission on Credentialing; and recruitment efforts.

Conclusion

The JHH investigational drugs and research residency, a combined PGY1 and PGY2 program with 5 competency areas, 14 goals, and 49 objectives, was granted pre-candidate status by ASHP in November 2016. The first resident began the program in June 2017.