bluuebunny/crossref_metadata_2025 huggingface dataset:
Regio- and stereoselective synthesis of novel isoxazolidine heterocycles by 1,3-dipolar cycloaddition between C-phenyl-N-methylnitrone and substituted alkenes. Experimental and DFT investigation of selectivity and mechanism
Authors: Hellel Djamila , Chafaa Fouad , Khorief Nacereddine Abdelmalek , Djerourou Abdelhafid , Vrancken Emmanuel
Published: June 2017

A series of isoxazolidine heterocycles was synthesized through the 1,3-dipolar cycloaddition (13DC) reaction of C-phenyl-N-methylnitrone with different substituted alkenes.
Liquefaction of waste pine wood and its application in the synthesis of a flame retardant polyurethane foam
Authors: Yue Dizhu , Oribayo Oluwasola , Rempel Garry L. , Pan Qinmin
Published: June 2017

The utilization of sustainable forestry waste resources in the production of polyurethane (PU) foam is a promising green alternative to the use of un-sustainable resources.
Transparent TiO2 nanotubes on zirconia for biomedical applications
Authors: Patel Sweetu B. , Baker Natalie , Marques Isabella , Hamlekhan Azhang , Mathew Mathew T. , Takoudis Christos , Friedrich Craig , Sukotjo Cortino , Shokuhfar Tolou
Published: June 2017

Depositing anodised titanium on ZrO2 substrate improves the bioactivity of the ZrO2 substrate in terms of enhanced cell viability, cell attachment and cell elongation.
High piezoelectric response and polymorphic phase region in the lead-free piezoelectric BaTiO3–CaTiO3–BaSnO3 ternary system
Authors: Janbua Wanwisa , Bongkarn Theerachai , Kolodiazhnyi Taras , Vittayakorn Naratip
Published: June 2017

A new coexistence phase compositions between rhombohedral, orthorhombic and tetragonal phase was identified in the (Ba,Ca)(Ti,Sn)O3 system.
Task-specific acidic ionic liquid-catalyzed efficient synthesis of β-enaminolactones from alkynoates and β-amino alcohols
Authors: Chen Lu , Chen Bin , Zhao Fuying , Li Yibiao , Li Bin , Zhang Min
Published: June 2017

An efficient task-specific acidic ionic liquid-catalyzed straightforward synthesis of β-enaminolactones has been demonstrated.
A fluorescence turn-off-on chemosensor based on carbon nanocages for detection of ascorbic acid
Authors: Bi Jingran , Wang Haitao , Kamal Tariq , Zhu Bei-Wei , Tan Mingqian
Published: June 2017

A type of carbon nanocages has been constructed through grilling of turbot by a facile method, and applied successfully as a fluorescent probe for rapid, selective as well as sensitive detection of ascorbic acid.
Double conjugated nanogels for selective intracellular drug delivery
Authors: Mauri Emanuele , Veglianese Pietro , Papa Simonetta , Mariani Alessandro , De Paola Massimiliano , Rigamonti Riccardo , Chincarini Giulia M. F. , Vismara Irma , Rimondo Stefano , Sacchetti Alessandro , Rossi Filippo
Published: June 2017

One of the most important drawbacks of nanomedicine is related to the unwanted rapid diffusion of drugs loaded within nanocarriers towards the external biological environment, according to the high clearance of body fluids.
Computational design to improve catalytic activity of cephalosporin C acylase from Pseudomonas strain N176
Authors: Tian Ye , Xu Zhaobin , Huang Xiaoqiang , Zhu Yushan
Published: June 2017

Engineering enzymes with high catalytic activities using enzyme designin silicoand a limited number of experimental evaluations is the new trend for the discovery of highly efficient biocatalysts.
Acid-ionic polymer as recyclable catalyst for one-pot three-component Mannich reaction
Authors: Senapak W. , Saeeng R. , Sirion U.
Published: June 2017

A recyclable solid-catalyst, acid-ionic polymer bearing imidazolium trifluoromethanesulfonate, [PS-Im][OTf] was presented as an efficient catalyst in a one-pot, three-component Mannich reaction of aldehydes, amines and ketones.
Hydroxyapatite/N-doped carbon dots/Ag3PO4 composite for improved visible-light photocatalytic performance
Authors: Chang Q. , Meng X. , Hu S. L. , Zhang F. , Yang J. L.
Published: June 2017

A new ternary hydroxyapatite/N-doped carbon dots/Ag3PO4 (HA/N-CDs/Ag3PO4) composite with remarkable photocatalytic performance and stability was developed via a cost-effective route.
Direct synthesis of carbon nanotubes on metallic foams as a cathode material with high mass load for lithium–air batteries
Authors: Ionescu Mihnea Ioan
Published: June 2017

Carbon nanotubes (CNTs) were synthesized directly on metallic substrates by spray pyrolysis chemical vapor deposition.
Improved overall hydrogen storage properties of a CsH and KH co-doped Mg(NH2)2/2LiH system by forming mixed amides of Li–K and Cs–Mg
Authors: Zhang Jiaxun , Wang Yiqi , Zhang Min , Leng Zihan , Gao Mingxia , Hu Jianjiang , Liu Yongfeng , Pan Hongge
Published: June 2017

Further improved overall hydrogen storage properties of a Mg(NH2)2/2LiH system is achieved by codoping CsH and KH.
Unprecedented selective homogeneous cobalt-catalysed reductive alkoxylation of cyclic imides under mild conditions
Authors: Cabrero-Antonino Jose R. , Adam Rosa , Papa Veronica , Holsten Mattes , Junge Kathrin , Beller Matthias
Published: June 2017

The first general and efficient non-noble metal-catalysed reductive C2-alkoxylation of cyclic imides (phthalimides and succinimides) is presented. Crucial for the success is the use of [Co(BF4)2·6H2O/triphos (L1)] combination and no external additives are required.
Visible-light-absorbing semiconductor/molecular catalyst hybrid photoelectrodes for H2 or O2 evolution: recent advances and challenges
Authors: Wang Mei , Yang Yong , Shen Junyu , Jiang Jian , Sun Licheng
Published: June 2017

Herein, we review the recent advances and challenges in the field of visible-light-absorbing semiconductor/molecular catalyst photoelectrodes for H2 and O2 evolution.
Curvature-induced microswarming
Authors: Bruss Isaac R. , Glotzer Sharon C.
Published: June 2017

Like meridian lines on a globe, two lines on a Gaussian-curved surface cannot be simultaneously straight and parallel everywhere.
Jumping drops on hydrophobic surfaces, controlling energy transfer by timed electric actuation
Authors: Wang Zhantao , van den Ende Dirk , Pit Arjen , Lagraauw Rudy , Wijnperlé Daniël , Mugele Frieder
Published: June 2017

Using inertia we are able to optimize the jump height H(tp) by controlling the actuation time tp.
Unexpected high performance of Fe-based nanocrystallized ribbons for azo dye decomposition
Authors: Chen Shuangqin , Yang Guannan , Luo Shuting , Yin Shujia , Jia Jili , Li Zhun , Gao Shenghan , Shao Yang , Yao Kefu
Published: June 2017

Fe-based multiphase nanocrystallized ribbons (CR-II) prepared by annealing of metallic glasses show unexpected high performance for Orange II degradation.
Nanoencapsulated crystallohydrate mixtures for advanced thermal energy storage
Authors: Graham Michael , Coca-Clemente José A. , Shchukina Elena , Shchukin Dmitry
Published: June 2017

Nanocapsules containing crystallohydrates and their mixtures were synthesised and proven to be stable over at least 100 cycles.
The way to panchromatic copper(i)-based dye-sensitized solar cells: co-sensitization with the organic dye SQ2
Authors: Malzner Frederik J. , Willgert Markus , Constable Edwin C. , Housecroft Catherine E.
Published: June 2017

DSCs co-sensitized with a copper(i)-based dye and an organic dye achieve the highest photoconversion efficiency relative to N719 so far reported for a copper-based DSC. The procedure by which the photoanodes are exposed to the two dyes is optimized for panchromatic light-harvesting.
Mechanically robust and shape-memory hybrid aerogels for super-insulating applications
Authors: Wu Jinrong , Zeng Lingping , Huang Xiaopeng , Zhao Lijuan , Huang Guangsu
Published: June 2017

A multi-functional aerogel is fabricated by integrating multiple networks. The multiple networks not only enable a solid thermal conductivity as low as ∼8 mW m−1 K−1, but also result in high mechanical properties, high hydrophobicity, shape memory and zero Poisson's ratio for the aerogel.
Rational synthesis of Na and S co-catalyst TiO2-based nanofibers: presence of surface-layered TiS3 shell grains and sulfur-induced defects for efficient visible-light driven photocatalysis
Authors: Ranjith Kugalur Shanmugam , Uyar Tamer
Published: June 2017

Surface-modified TiO2 nanofibers (NFs) with tunable visible-light photoactive catalysts were synthesised through electrospinning, followed by a sulfidation process.
Functionalised metal–organic frameworks: a novel approach to stabilising single metal atoms
Authors: Szilágyi P. Á. , Rogers D. M. , Zaiser I. , Callini E. , Turner S. , Borgschulte A. , Züttel A. , Geerlings H. , Hirscher M. , Dam B.
Published: June 2017

We have investigated the potential of metal–organic frameworks for immobilising single atoms of transition metals using a model system of Pd supported on NH2-MIL-101(Cr).
Crystalline In–Sb–S framework for highly-performed lithium/sodium storage
Authors: Nie Lina , Xie Jian , Liu Guangfeng , Hao Shiji , Xu Zhichuan Jason , Xu Rong , Zhang Qichun
Published: June 2017

With ammonium ions and 1,10-phenanthroline (phen) molecules as structure-directing agents, a new crystalline chalcogenide (NH4)InSb2S5·phen(IAS) has been surfactant-thermally synthesized, fully characterized and explored as an effective anode material for lithium/sodium ion batteries.
Novel bifunctional aromatic linker utilized in CdSe quantum dots-sensitized solar cells: boosting the open-circuit voltage and electron injection
Authors: Ding Wei-Lu , Peng Xing-Liang , Sun Zhu-Zhu , Li Ze-Sheng
Published: June 2017

The designed novel PDTCA series linkers.
A Co-doped porous niobium nitride nanogrid as an effective oxygen reduction catalyst
Authors: Tang Haibo , Tian Xinlong , Luo Junming , Zeng Jianhuang , Li Yingwei , Song Huiyu , Liao Shijun
Published: June 2017

Transition metal nitrides have recently attracted significant interest as electrocatalysts for the oxygen reduction reaction (ORR) owing to their low electrical resistance and good corrosion resistance.
Modulating aggregation-induced emission via a non-conjugated linkage of fluorophores to tetraphenylethenes
Authors: Han Xie , Zhang Bibo , Chen Jianhua , Liu Sheng Hua , Tan Chunyan , Liu Haiyang , Lang Matthew J. , Tan Ying , Liu Xiaogang , Yin Jun
Published: June 2017

A fluorophore (DNS or NBD) is attached to tetraphenylethene via a non-conjugated bridge, endowing the resulting aggregates with distinct emission properties.
Optimized structure of silane-core containing host materials for highly efficient blue TADF OLEDs
Authors: Choi Suna , Godumala Mallesham , Lee Ji Hyung , Kim Gyeong Heon , Moon Ji Su , Kim Jun Yun , Yoon Dae-Wi , Yang Joong Hwan , Kim Jinook , Cho Min Ju , Kwon Jang Hyuk , Choi Dong Hoon
Published: June 2017

The TADF OLEDs based on these silane-core host materials showed a maximum EQE of up to 18.8%.
Facile synthesis and screen printing of dual-mode luminescent NaYF4:Er,Yb (Tm)/carbon dots for anti-counterfeiting applications
Authors: Li Mengxiao , Yao Weijing , Liu Jun , Tian Qingyong , Liu Li , Ding Jin , Xue Qingwen , Lu Qiang , Wu Wei
Published: June 2017

A printed invisible QR code pattern could be identified with green and blue colors under 980 nm and 365 nm light excitation, respectively.
Existence and multiplicity of solutions for a class of quasilinear elliptic field equation on ℝN
Authors: Alves Claudianor O. , dos Santos Alan C.B.
Published: June 2017

In this paper, we establish existence and multiplicity of solutions for the following class of quasilinear field equation

   −Δu + V(x)u − Δpu + W′(u) = 0,  in  ℝN,    (P)

where u = (u1, u2, … , uN+1), p > N ≥ 2, W is a singular function and V is a positive continuous function.
Efficacy, Safety, and Duration of a Frameless Fiducial-Less Brain Biopsy versus Frame-based Stereotactic Biopsy: A Prospective Randomized Study
Authors: Ellul John , Chroni Elisabeth , Constantoyannis Constantine , Georgiopoulos Miltiadis
Published: June 2017

Background/Objective We compared the efficacy, duration, safety, length of hospital stay of a frameless fiducial-less brain biopsy with those of the standard frame-based stereotactic biopsy.

Patients and Methods This prospective cohort study enrolled 56 adult patients: (1) for whom no conclusive diagnosis could be reached noninvasively; (2a) who had lesions involving deep-seated and eloquent areas, multifocal lesions, or lesions for which craniotomy and lesion removal was not indicated, or (2b) were poor candidates for craniotomy (> 80 years of age and/or with serious comorbidities). Frameless and frame-based biopsy were performed in 28 patients each

Results A diagnosis was not made in four cases (14.3%) of the frame-based biopsy group and in three cases (10.7%) of the frameless biopsy group, in spite of accurate targeting (p = 1.0). The mean duration of the whole procedure (preparatory steps outside the operating room [OR], inside the OR, surgery) was 111.3 minutes for the frame-based biopsy and 79.1 minutes for the frameless biopsy (p = 0.001). No statistically significant differences between the two methods were found concerning new neurologic symptoms, new abnormal findings in postoperative computed tomography (CT) and length of postoperative hospital stay (LOS). The smallest diameter of a successfully biopsied lesion was 15 mm for both groups.

Conclusions The frameless fiducial-less brain biopsy was equally efficacious and safe compared with the standard stereotactic frame-based biopsy. The overall duration of frameless biopsy is shorter than that of frame-based biopsy, mainly because the preparatory steps in frameless biopsy require less time. However, the overall time spent in the OR did not differ between the two groups. The LOS also did not differ significantly.
Psychological Impact of Facial Trauma
Authors: Sahni Vaibhav
Published: June 2017

Examination of the mental state of patients suffering from facial trauma is rarely ever recorded, let alone screening them for posttraumatic stress disorders (PTSDs) or generalized anxiety disorder. Providing early support to the patient in light of such psychological conditions can improve the overall quality of life. The aim of this study was to perform a literature review to assess the relation of mental state disorders to facial trauma in terms of their prevalence, assess screening methodology, and also to evaluate the prognosis of individuals subjected to psychological intervention/screening at an early stage of clinical examination. Research databases such as ScienceDirect, Google Scholar, PubMed, and Medline were searched using the keywords “psychological trauma,” “facial trauma,” and “PTSD.” Only meta-analyses, systematic reviews, and original research articles in the English language were included in the study. Correspondence to journal editors and clinician opinions were excluded from the study. Out of a total of 459 results, only 8 articles satisfied the inclusion criteria of the study. The literature review showed that patients suffering from orofacial trauma had significantly increased levels of mental state disorders such as PTSD and generalized anxiety disorder, more so in victims of assault. The results of this literature review clearly point toward an increased prevalence of mental state disorders in patients suffering from facial trauma, which warrants for early intervention in this regard to improve the quality of life of these patients.
Insular Epilepsy: Clinical, Electrophysiological Features, and Surgical Treatment
Authors: Lew Sean , Inglese Christopher , Mueller Wade , Marashly Ahmad
Published: June 2017

The insula, also known as the fifth lobe of the brain, is a phylogenetically older part of the cortex that forms the floor of the Sylvian fissure. It is densely connected with multiple regions in the brain, reflecting its rich functionality. Epilepsy arising from the insula has been only relatively recently described and characterized in details. Besides having unique features, the insula is believed to be the origin of seizures resembling those of suspected temporal or frontal lobe epilepsy that do not respond to traditional surgical resections. In this review article, we describe the gross and functional anatomy of the insula, clinical and electrophysiological manifestations of insular epilepsy, and surgical evaluation and treatment approaches.
Improving Shoulder Dystocia Management and Outcomes with a Targeted Quality Assurance Program
Authors: Will Susan , Allen Robert , Satin Andrew , Gurewitsch Allen Edith
Published: June 2017

Background Several investigators have achieved remarkable success in transferring shoulder dystocia management skills mastered with simulation training to clinical practice. However, other investigators have not demonstrated similar benefits, raising questions about the comparative effectiveness of specific simulation schemes, instructional content, and additional quality assurance measures between successful and unsuccessful interventions. After our initial review revealed gaps in following shoulder dystocia management algorithms, documentation and timely follow-up of injured neonates, we developed and implemented five interventions, three educational and two systems-level, aimed at improving shoulder dystocia management.

Objective To describe the clinical impact of a systematic program of quality improvement on outcomes of vaginal births complicated by shoulder dystocia.

Setting An urban tertiary academic medical center that trains 36 obstetrics/gynecology residents (9 per year) and provides comprehensive obstetrical services for approximately 2,000 deliveries annually.

Study Design We use SQUIRE 2.0 (Standards for Quality Improvement Reporting Excellence) to (1) describe our core instructional content and simulation-based practice, emphasizing specific proscriptive and prescriptive recommendations and their evidence basis, and (2) to report an interrupted time series assessment of the clinical impact of our systematic quality improvement program targeting shoulder dystocia-associated brachial plexus injury.

Results Compared with baseline (June 1993 to December 2004), the incidence of shoulder dystocia among vaginally delivered infants with birth weight ≥ 2,500 g at Johns Hopkins Hospital (January 2014 to December 2015) increased from 2.6 to 4.6% (X
2 = 29.8; df = 1; p < 0.0001); in addition, documentation improved, direct fetal manipulation increased, while use of episiotomy for the management of shoulder dystocia decreased. While preintervention only 65% of brachial plexus injury were associated with shoulder dystocia, 100% of neonatal brachial plexus injuries were associated with shoulder dystocia postintervention (80/122 [65%] vs. 7/7 [100%], X
2 = 3.66; df = 1; p = 0.055), a trend reflecting simultaneous increased recognition of impacted shoulders and improved overall management of shoulder dystocia. Most importantly, the incidence of brachial plexus injury among shoulder-dystocia-complicated vaginal deliveries has decreased from a baseline of 31.6 to 6.3% (X
2 = 27.9; df = 1; p < 0.0001), and the absolute brachial plexus injury rate declined from 8.2 to 2.9 per 1,000 vaginal births ≥ 2,500 g, a reduction of 64.5% (X
2 = 7.3; df = 1; p = 0.007).

Conclusion A systematic program of quality assurance with specific proscriptive and prescriptive instructional content and management recommendations is associated with improved recognition, management, and clinical outcomes of shoulder dystocia.
Placental Teratoma, Omphalomesenteric Duct Remnant, or Intestinal Organoid (Enteroid) Differentiation: A Diagnostic Dilemma
Authors: Jazaerly Tarek , Kostadinov Stefan , Khedr Salwa
Published: June 2017

We report an unusual case of fully developed fetal intestinal segment(s) within a nodule on the chorionic plate of the placenta of a 27-year-old female patient at 37 weeks gestation with spontaneous vaginal delivery. Gross examination of the placenta revealed a chorionic plate nodule near the insertion of the umbilical cord, which, upon microscopic evaluation, raised the differential diagnostic possibilities of placental teratoma, vitelline/omphalomesenteric duct anomaly, and intestinal organoid differentiation. We discuss the distinguishing features, morphogenesis, and clinical significance of the aforementioned entities and review the pertinent medical literature.
Monochorionic-Triamniotic Triplet Pregnancy Complicated by Twin Reversed Arterial Perfusion Sequence: Case Report and Literature Review
Authors: Pan Pingshan , Luo Guoyang , Tang Lu , Rolle Jeanne , Qin Yuqin , Zeng Quan , Wei Jiangting , Chen Yuanfang , Wei Hongwei
Published: June 2017

Background Monochorionic-triamniotic pregnancies are rare and fraught with complications.

Case A case of monochorionic-triamniotic triplet pregnancy complicated by twin reversed arterial perfusion (TRAP) sequence is presented. The patient declined termination or selective fetal reduction. Triplet C was acardiac. At 24 weeks, triplet B developed polyhydramnios. At 30 weeks, polyhydramnios was seen in all three amniotic sacs, but without signs of fetal hydrops and with normal Doppler velocimetry measurements in the umbilical artery, middle cerebral artery, and ductus arteriosus of triplets A and B. At 322/7 weeks, the patient presented with preterm premature rupture of membranes and preterm labor. Two live male infants were delivered by cesarean delivery weighing 1,350 and 1,390 g, respectively; the acardiac fetus weighed 1,460 g. Pathology examination revealed a single placenta weighing1,250 g, with evidence of direct vascular connections between triplets A and C as well as between triplets A and B.

Conclusion Monochorionic-triamniotic triplet pregnancy with TRAP sequence is rare. Although the risk of complications is high, such pregnancies can be managed conservatively in select cases.
„Up-date 3D Planungssysteme“ – digitale Arbeitsprozesse bringen multiplen Nutzen
Authors: Stachulla Gerhard
Published: June 2017

Wenn wir heute über den digitalen Workflow in der Zahnheilkunde lesen oder hören, so sind es in erster Linie die Techniken der intraoralen Abformung in Verbindung mit CAD/CAM Prozessen im Labor. Oft werden diese Abläufe auch im Rahmen der Implantatprothetik übernommen und in den täglichen Workflow integriert.
Die Vollnarkose in der Zahnmedizin
Authors: Mathers Frank , Jakobs Wolfgang
Published: June 2017

Die Zahnmedizin ist geschichtlich eng mit der Anästhesiologie verbunden denn der amerikanische Zahnarzt Dr. Horrace Wells gilt als Begründer der modernen Anästhesiologie. Diese gemeinsame Tradition wird heute in Ländern wie Amerika und Japan fortgesetzt mit dem Zahnärztlichen Facharzt für Anästhesiologie, der gleichwertig neben seinem Kollegen aus der Humanmedizin praktiziert.
Projekt SAMBA
Authors: Peters S. , Wäsche H. ,   Projektteam SAMBA
Published: June 2017

Bewegungsmangel ist ein verbreiteter Risikofaktor für chronische Erkrankungen und körperliche Aktivität
und körperliches Training stellen effektive therapeutische Maßnahmen bei einer Vielzahl von bestehenden
Erkrankungen dar. Dennoch besteht ein hohes Maß an körperlicher Inaktivität in der deutschen Bevölkerung.
Bewegungsförderung wird benötigt und ist in verschiedenen Formaten effektiv (individuumsbezogene sowie
umwelt- und politikbasierte Ansätze). Seit September 2016 gibt es in Deutschland Nationale Empfehlungen
für Bewegung und Bewegungsförderung (NEBB), die Aussagen dazu treffen, in welchem Ausmaß sich Menschen
verschiedener Bevölkerungsgruppen (z. B. Kinder & Jugendliche, Erwachsene) bewegen sollten und welche
Maßnahmen der Bewegungsförderung gemäß wissenschaftlicher Evidenz ratsam sind. Für die zukünftige
Dissemination der NEBB erscheint die Kenntnis relevanter Akteure notwendig, welche in Deutschland einen
direkten oder indirekten Beitrag zur Bewegungsförderung leisten. Für einen systematischen Überblick wurde
das hier vorgestellte Projekt SAMBA initiiert. In der Studie wird ein mehrstufiges Verfahren eingesetzt.
Einerseits werden qualitative Experteninterviews, eine anschließende Netzwerkvisualisierung und eine
Analyse zur Netzwerkentwicklung durchgeführt, andererseits erfolgt eine Fragebogenbefragung relevanter
und potenzieller Akteure der Bewegungsförderung.
Correlation between drive amplitude and resonance frequency in electrochemical strain microscopy: Influence of electrostatic forces
Authors: Lushta Valon , Bradler Stephan , Roling Bernhard , Schirmeisen André
Published: June 2017

Electrochemical strain microscopy (ESM) is based on the detection of the surface deformation of electrochemical materials induced by local electrical excitation via an AFM tip. Here, we compare the two common excitation methods, dual ac resonance tracking and band excitation, for resonance–amplified electrochemical strain microscopy. By means of these methods, we characterize two different materials, a mixed electronic-ionic conductor and a pure solid state ion conductor. We find a significant correlation between the resonance frequency and ESM drive amplitude. We performed numerical simulations taking into account the complex interplay of sample-tip interactions, contact mechanics, and cantilever dynamics. These simulations predict a positive amplitude-frequency correlation for pure Vegard strain and negative correlations for local tip/sample and non-local cantilever/sample electrostatic forces. These results are important for the quantitative interpretation of ESM-based images.
Theoretical investigation of rotationally inelastic collisions of CH(X2Π) with hydrogen atoms
Authors: Dagdigian Paul J.
Published: June 2017

We report calculations of state-to-state cross sections for collision-induced rotational transitions of CH(X2Π) with atomic hydrogen. These calculations employed the four adiabatic potential energy surfaces correlating CH(X2Π) + H(2S), computed in this work through the multi-reference configuration interaction method [MRCISD + Q(Davidson)]. Because of the presence of deep wells on three of the potential energy surfaces, the scattering calculations were carried out using the quantum statistical method of Manolopoulos and co-workers [Chem. Phys. Lett. 343, 356 (2001)]. The computed cross sections included contributions from only direct scattering since the CH2 collision complex is expected to decay predominantly to C + H2. Rotationally energy transfer rate constants were computed for this system since these are required for astrophysical modeling.
Gyrokinetic electron and fully kinetic ion simulations of fast magnetosonic waves in the magnetosphere
Authors: Gao Xiaotian , Liu Kaijun , Wang Xueyi , Min Kyungguk , Lin Yu , Wang Xiaogang
Published: June 2017

Two-dimensional simulations using a gyrokinetic electron and fully kinetic ion (GeFi) scheme are preformed to study the excitation of fast magnetosonic waves in the terrestrial magnetosphere, which arise from the ion Bernstein instability driven by proton velocity distributions with a positive slope with respect to the perpendicular velocity. Since both ion and electron kinetics are relevant, particle-in-cell (PIC) simulations have often been employed to study the wave excitation. However, the full particle-in-cell scheme is computationally expensive for simulating waves in the ion scale because the electron scale must be fully resolved. Therefore, such simulations are limited to reduced proton-to-electron mass ratio (mp/me) and light-to-Alfvén speed ratio (c/vA). The present study exploits the GeFi scheme that can break through these limitations to some extent, so larger mp/me and c/vA can be used. In the simulations presented, the ion Bernstein instability is driven by a proton velocity distribution composed of 10% energetic protons with a shell distribution and 90% relatively cool, background protons with a Maxwellian distribution. The capability of the GeFi code in simulating the ion Bernstein instability is first demonstrated by comparing a GeFi simulation using reduced mass ratio (mp/me=100) and speed ratio (c/vA=15) to a corresponding PIC simulation as well as linear dispersion analysis. A realistic speed ratio (c/vA=400) and a larger mass ratio (mp/me=400) are then adopted in the GeFi code to explore how the results vary. It is shown that, as the increased mp/me and c/vA lead to a larger lower hybrid frequency, ion Bernstein waves are excited at more ion cyclotron harmonics, consistent with the general prediction of linear dispersion theory. On the other hand, the GeFi simulations also revealed some interesting features after the instability saturation, which are likely related to nonlinear wave-wave interactions.
A high-resolution programmable Vernier delay generator based on carry chains in FPGA
Authors: Cui Ke , Li Xiangyu , Zhu Rihong
Published: June 2017

This paper presents an architecture of a high-resolution delay generator implemented in a single field programmable gate array chip by exploiting the method of utilizing dedicated carry chains. It serves as the core component in various physical instruments. The proposed delay generator contains the coarse delay step and the fine delay step to guarantee both large dynamic range and high resolution. The carry chains are organized in the Vernier delay loop style to fulfill the fine delay step with high precision and high linearity. The delay generator was implemented in the EP3SE110F1152I3 Stratix III device from Altera on a self-designed test board. Test results show that the obtained resolution is 38.6 ps, and the differential nonlinearity/integral nonlinearity is in the range of [−0.18 least significant bit (LSB), 0.24 LSB]/(−0.02 LSB, 0.01 LSB) under the nominal supply voltage of 1100 mV and environmental temperature of 20 °C. The delay generator is rather efficient concerning resource cost, which uses only 668 look-up tables and 146 registers in total.
Fabrication of concave micromirrors for single cell imaging via controlled over-exposure of organically modified ceramics in single step lithography
Authors: Bonabi A. , Cito S. , Tammela P. , Jokinen V. , Sikanen T.
Published: June 2017

This work describes the fabrication of concave micromirrors to improve the sensitivity of fluorescence imaging, for instance, in single cell analysis. A new approach to fabrication of tunable round (concave) cross-sectional shaped microchannels out of the inorganic-organic hybrid polymer, Ormocomp®, via single step optical lithography was developed and validated. The concave micromirrors were implemented by depositing and patterning thin films of aluminum on top of the concave microchannels. The round cross-sectional shape was due to residual layer formation, which is inherent to Ormocomp® upon UV exposure in the proximity mode. We show that it is possible to control the residual layer thickness and thus the curved shape of the microchannel cross-sectional profile and eventually the focal length of the micromirror, by simply adjusting the UV exposure dose and the distance of the proximity gap (to the photomask). In general, an increase in the exposure dose or in the distance of the proximity gap results in a thicker residual layer and thus an increase in the radius of the microchannel curvature. Under constant exposure conditions, the radius of curvature is almost linearly dependent on the microchannel aspect ratio, i.e., the width (here, 20–200 μm) and the depth (here, 15–45 μm). Depending on the focal length, up to 8-fold signal enhancement over uncoated, round Ormocomp® microchannels was achieved in single cell imaging with the help of the converging micromirrors in an epifluorescence microscopy configuration.
Petroleum systems analysis of the northern Houtman Sub-basin
Authors: Hall Lisa , Grosjean Emmanuelle , Borissova Irina , Southby Chris , Owens Ryan , Bernardel George , Mitchell Cameron
Published: June 2017

Interpretation of newly acquired seismic data in the northern Houtman Sub-basin (Perth Basin) suggests the region contains potential source rocks similar to those in the producing Abrolhos Sub-basin. The regionally extensive late Permian–Early Triassic Kockatea Shale has the potential to contain the oil-prone Hovea Member source interval. Large Permian syn-rift half-graben, up to 10 km thick, are likely to contain a range of gas-prone source rocks. Further potential source rocks may be found in the Jurassic–Early Cretaceous succession, including the Cattamarra Coal Measures, Cadda shales and mixed sources within the Yarragadee Formation. This study investigated the possible maturity and charge history of these different source rocks. A regional pseudo-3D petroleum systems model was constructed using new seismic interpretations. Heat flow was modelled using crustal structure and possible basement composition determined from potential field modelling, and subsidence analysis was used to investigate lithospheric extension through time. The model was calibrated using temperature and maturity data from nine wells in the Houtman and Abrolhos sub-basins. Source rock properties are assigned based on an extensive review of total organic carbon, Rock Eval and kinetic data for the offshore northern Perth Basin. Petroleum systems analysis results show that Permian, Triassic and Early Jurassic source rocks may have generated large cumulative volumes of hydrocarbons across the northern Houtman Sub-basin, whereas the Middle Jurassic–Cretaceous sources remain largely immature. However, the timing of hydrocarbon generation and expulsion with respect to trap formation and structural reactivation is critical for the successful development and preservation of hydrocarbon accumulations.
Integrated 3D basin and petroleum systems modelling of the Great Australian Bight
Authors: Frery E. , Ducros M. , Langhi L. , Strand J. , Ross A.
Published: June 2017

3D stratigraphic, structural, thermal and migration modelling has become an essential part of petroleum systems analysis for passive margins, especially if complex 3D facies patterns and extensive volcanic activity are observed. A better understanding of such underexplored offshore areas requires a refined 3D basin modelling approach, with the implementation of realistically sized volcanic intrusions, source rocks and reservoir intervals. In this study, an integrated modelling workflow based on a Great Australian Bight case study has been applied. The 244800-km2 3D model integrates well data, marine surveys, 3D stratigraphic forward modelling and 3D basin modelling to better predict the effects of 3D facies variations and heat flow anomalies on the determination of the source rock-enriched intervals, the source rock maturity history and the hydrocarbon migration pathways. Plausible sedimentary sequences have been estimated using a stratigraphic forward model constrained by the limited available well data, seismic interpretation and published tectonic basin history. We also took into account other datasets to produce a thermal history model, such as the location of known volcanic intrusion, volcanic seamounts, bottom hole temperature and surface heat flow measurements. Such basin modelling integrates multiple datatypes acquired in the same basin and provides an ideal platform for testing hypotheses on source rock richness or kinetics, as well as on hydrocarbon migration timing and pathways evolution. The model is flexible, can be easily refined around specific zones of interest and can be updated as new datasets, such as new seismic interpretations and data from new sampling campaigns and wells, are acquired.
Project overruns: why are we still getting it wrong?
Authors: Lee Gareth D. , Whitaker Simon P. , Wilkes Martin
Published: June 2017

The issue of poor project performance in the oil and gas industry is not new. It has been discussed since the 1980s and, over the past 30 years, there has been considerable effort put into improving project outcomes. As an industry, we have invested heavily in project management and estimating processes to ensure that reliable data are available for investment decisions.
However, recent experience in Australia and elsewhere in the world suggests that little real improvement has been made.
This presentation critically examines aspects of project performance and decision making by analysing: the commercial impact that recent cost and schedule outcomes have had on Australian projects; common problems associated with setting and managing cost and schedule expectations throughout the project development process; real (anonymous) examples from projects to indicate how biases affect behaviours, decisions and outcomes; and simple ways to build a more realistic assessment of risk and uncertainty into cost and schedule estimates.
We conclude by discussing why this is still important for future Australian projects given the days of complex greenfield megaprojects are likely behind us.
Turn your workover costs into an investment: a case study in an east coast CSG project
Authors: Boto Elizeu , Heyes Nicholas , Merritt Don , Saremi Nima
Published: June 2017

Over the next decades, up to 25% of the operating budget of east coast CSG to LNG companies will be spent on interventions required to maintain or remediate productivity of the thousands of wells already drilled in Queensland. The cost of each intervention can range between 30% and 50% of the drilling cost of an individual well. Identifying which interventions, also known as workovers, do not contribute to the overall project value can help save the operators millions of dollars over the life of the field.
Production of unconventional wells increases initially after workovers and stimulations, but, ultimately, this production declines, often at a rapid rate. Wells are then abandoned after reaching an economical limit. This limit is influenced by multiple factors, some of which can be technical, such as characteristics of the reservoir, or commercial, such as in the price of gas or related to the availability of installed capacity required to process the product.
On the basis of a real case study with a CSG to LNG company in Queensland, the present paper will elaborate how one of the operators is making confident decisions around which wells should be included as part of their workover program. Early findings of the study showed that significant value can be created by applying technology in the identification of which areas of the field are most likely to yield a better return and cases where the production decline can be mitigated only by drilling new wells.
The gas hub in Asia
Authors: Farrell Bradley , Sandilya Ajit
Published: June 2017

Asia remains the last net importing region without a gas hub or a representative gas price. However, increased market liquidity and more transparent pricing presage the development of hub-based trading in the region. This paper assesses three potential locations for an Asia Pacific gas hub, considering for each location the critical enabling factors of infrastructure, markets and regulation. We suggest that an Asian gas hub will evolve, but as a tripod, with: (1) an active contract trading hub in Singapore; (2) a secondary physical hub for volume storage and transfer in Tokyo harbour; and (3) a tertiary balancing point as the ultimate price arbiter in Shanghai. We do not expect this Asian hub to mature fully until the mid-2020s. However, we do see many of the crucial elements already emerging.
Ready to collaborate? Operator and supply chain under the spotlight
Authors: Lynn Mike , Samuel Alan
Published: June 2017

In the last 12 months or so, particularly with the drop in oil price, there’s been a lot of speculation about the future of the Australian oil and gas industry. Strenuous efforts are being made to bring down costs, reduce complexity and expedite the completion of major capital projects.
Yet with the commodity price looking likely to be subdued for some time, serious questions persist. How can we sustain activity in Australia, secure the investment needed to continue exploration and appraisal drilling, for the next wave of projects?
In looking for answers to these challenges, collaboration is a theme that comes up time and time again. But what does it actually mean? What does it look like in practice? Who does it well and how? And which companies are reaping the rewards of great collaboration?
To fill this knowledge gap we are launching a survey which will look at many aspects of collaboration in the Australia and compare this with the results of similar surveys conducted in the UK. We will be looking to survey both operators and service companies working in the Australia and find out:

What does collaboration mean?
What constitutes effective collaboration?
How do companies view themselves and each other as collaborators?
How does collaboration in Australia compare with companies in the North Sea?

We hope a better understanding of collaboration could help companies in Australia continue to improve productivity and efficiency, adopt new ways of working, and truly make the most of Australia’s abundant resources.
Process safety management at Woodside – creating a sustainable global approach
Authors: Doyle Rachelle A.
Published: June 2017

Woodside’s Process Safety Management (PSM) Initiative introduced a framework for a holistic, effective and sustainable PSM system. We adapted an international industry standard to develop our own company-specific PSM procedure. Embedding PSM requirements into the existing Woodside Management System and workforce behaviours enables the business to execute consistent, proactive PSM throughout the exploration and production lifecycle – across assets and countries.
Change was facilitated through creating a shared vision for process safety, ‘We all own, understand and act to control process safety risks’. We set clear expectations for ourselves and those we work with (our contractors) through defined roles and responsibilities. Fundamentally we moved our mindset to being ‘Line-Led, Risk-Based’, placing high value on visible leadership and operational discipline. Behavioural change was supported with a comprehensive training curriculum aligned to competencies and a coaching program.
To facilitate consistent application of PSM across our global operations, we implemented a system using a whole of company approach. A key focus was applying a deep understanding of the hazards and risks in the business to establish a framework for quality multi-discipline risk assessments and risk-based decision making. Implementation included a suite of supporting technical and management system changes to grow a high value process safety culture – where we actively seek out the challenging issues and see the red indicators as opportunity for improvement.
Our PSM Initiative empowers sustainable process safety performance through a risk aware workforce where everyone knows their top process safety risks and is required to take action to manage those risks.
Determining the impacts of coal seam gas extraction on water resources and water-dependent assets
Authors: Post D. A. , Baker P. A.
Published: June 2017

As recently as two years ago, there were numerous proposals to develop coal seam gas projects across eastern Australia. Today the picture is very different. While significant coal seam gas development has occurred in the Surat Basin, Metgasco has surrendered their licences and AGL have indicated that they will not proceed in Gloucester. The only coal seam gas development that is still proceeding in NSW is Santos’s proposal in the Liverpool Plains (Namoi). However, recent developments in Australian Government policy to increase gas supply on the eastern seaboard means that the results of these assessments will inform future decisions.
Research carried out as part of the Bioregional Assessment Programme (BAP) has shown some surprising results in the Richmond River (Clarence-Moreton bioregion) regarding the potential impacts of coal seam gas development on the water resources and water-dependent assets of that region.
This study will show how we developed a groundwater and surface water cumulative impact model in the Clarence-Moreton bioregion, and present the key findings from that modelling. Similar cumulative impact assessments are currently underway in the Maranoa-Balonne-Condamine, Gloucester, Hunter, Galilee, and Namoi regions and we expect these to be published by late 2017.
As part of a core tenet of transparency in the BAP, the data collected and models developed as part of these assessments will be freely available for Industry proponents, State regulators and other interested parties to access and utilise.
The Surat cumulative management area in south-eastern Queensland has provided a structure for developing coal seam gas resources while protecting water resources via a cumulative approach to management. We propose that the models we have developed would provide the basis of a similar structure to assess and manage cumulative impacts in regions across Australia that may see coal seam gas or other forms of unconventional gas development.
Postcard from Pennsylvania: lessons learned during successful fight over Marcellus Shale operations that may have applicability to Australian discussion
Authors: Tucker Chris
Published: June 2017

This article explores the recent history and significance of unconventional natural gas development in the Marcellus region of Pennsylvania, including a look at the state’s historical background on hydrocarbon production, the effect of political and social media campaigns against development activities and the outlook for the future. In consultation with industry and environmental groups, Pennsylvania’s state government has crafted rules and regulations allowing responsible development to proceed, helping industry secure and retain its licence to operate in the process. This success was further made possible by an early and robust public engagement strategy that refuted misinformation and provided proper context for both the benefits and challenges inherent in resource development. However, in neighbouring states like New York and Maryland, similar public strategies and campaigns in support of development were not as quickly assembled and mobilised. The contrasting histories (and final results) help provide a template of lessons learned for other areas considering shale development, including an opportunity to avoid the kinds of mistakes that have led to moratoria, bans or other restrictions on specific well stimulation technologies, such as hydraulic fracturing.
Sexual risk behaviours associated with unlicensed driving among young adults in Miami’s electronic dance music nightclub scene
Authors: Buttram Mance E. , Kurtz Steven P. , Paul Roddia J.
Published: June 2017

Literature indicates that unlicensed driving (UD) offenders report substance use risk behaviours, yet data related to sexual risk behaviours is unknown. This study examined sexual and other risk behaviours among young adults in Miami, Florida, comparing UD and non-UD offenders (n = 498). Compared with others, UD offenders were more likely to report group sex history, being high for sex half the time or more, purchasing sex and sexually transmissible infection history. Results suggest that locating sexual risk reduction interventions inside of the justice system would benefit UD offenders.
Integration in Flanders (Belgium) – Citizenship as achievement
Authors: Pulinx Reinhilde , Van Avermaet Piet
Published: June 2017

In this article we will show, with Flanders (Belgium) as a concrete case, how intertwined integration and citizenship discourses and policies have become in contemporary super-diverse societies. Flanders is a clear example of how integration is gradually being replaced by virtual or moral citizenship. The fact that (moral) citizenship has replaced integration, has as a consequence that the concept of citizenship has shifted, in a subtle way, from a dynamic and contextualized process, which shapes itself in daily practice through social networks, into ‘citizenship as achievement’. This is an achievement that is the sole responsibility of certain groups in society. It is also an impossible achievement, because some are exempt from it and others will always be perceived as not yet belonging to the category of ‘true citizens’.