bluuebunny/crossref_metadata_2025 huggingface dataset:
Chemoselective synthesis of m-teraryls through ring transformation of 2H-pyran-2-ones by 2-(1-arylethylidene)-malononitriles
Authors: Panwar Rahul , Shally Shally , Shaw Ranjay , Elagamy Amr , Pratap Ramendra
Published: October 2018

Base mediated chemoselective synthesis of m-teraryls was carried out by the reaction of 2H-pyran-2-ones and 2-(1-arylethylidene)malononitriles.
Influence of halogen substitution on aggregation-induced near infrared emission of borondifluoride complexes of 2′-hydroxychalcones
Authors: D’Aléo Anthony , Saul Andres , Attaccalite Claudio , Fages Frédéric
Published: October 2018

In this study, we investigate the role of halogen atoms on the fluorescence emission properties of borondifluoride complexes of 2′-hydroxychalcones in the solid-state.
A triple-stimuli responsive hormone delivery system equipped with pillararene magnetic nanovalves
Authors: Li Xiangshuai , Han Junyou , Wang Xin , Zhang Yanxin , Jia Chengguo , Qin Jianchun , Wang Chunyu , Wu Jia-Rui , Fang Wenhui , Yang Ying-Wei
Published: October 2018

A stimuli responsive hormone delivery system was designed and constructed from mesoporous silica and pillararene magnetic nanovalves, which can release hormones on command to promote the growth ofArabidopsis thalianaand cabbage.
Inhibition of FAD-dependent lysine-specific demethylases by chiral polyamine analogues
Authors: Umezawa Naoki , Tsuji Kasumi , Sato Shin , Kikuchi Masaki , Watanabe Hisami , Horai Yuhei , Yamaguchi Masashi , Hisamatsu Yosuke , Umehara Takashi , Higuchi Tsunehiko
Published: October 2018

Polyamine-based inhibitors of lysine-specific demethylases 1 and 2 (LSD1 and LSD2) have been developed using solid-phase synthesis.
Post-synthetic modulation of the charge distribution in a metal–organic framework for optimal binding of carbon dioxide and sulfur dioxide
Authors: Li Lei , da Silva Ivan , Kolokolov Daniil I. , Han Xue , Li Jiangnan , Smith Gemma , Cheng Yongqiang , Daemen Luke L. , Morris Christopher G. , Godfrey Harry G. W. , Jacques Nicholas M. , Zhang Xinran , Manuel Pascal , Frogley Mark D. , Murray Claire A. , Ramirez-Cuesta Anibal J. , Cinque Gianfelice , Tang Chiu C. , Stepanov Alexander G. , Yang Sihai , Schroder Martin
Published: October 2018

Modulation of pore environment is an effective strategy to optimize guest binding in porous materials.
Conformer-specific [1,2]H-tunnelling in captodatively-stabilized cyanohydroxycarbene (NC–C̈–OH)
Authors: Eckhardt André K. , Erb Frederik R. , Schreiner Peter R.
Published: October 2018

Trans-Cyanohydroxycarbene undergoes conformer-specific [1,2]H-tunnelling to cyanoformaldehyde through the highest penetrated reaction barrier of 33.3 kcal mol−1reported to date.
Correction: Covalent organic nanosheets for bioimaging
Authors: Das Gobinda , Benyettou Farah , Sharma Sudhir Kumar , Prakasam Thirumurugan , Gándara Felipe , de la Peña-O’Shea Victor A. , Saleh Na’il , Pasricha Renu , Jagannathan Ramesh , Olson Mark A. , Trabolsi Ali
Published: October 2018

Correction for ‘Covalent organic nanosheets for bioimaging’ by Gobinda Das et al., Chem. Sci., 2018, DOI: 10.1039/c8sc02842g.
Template-free amine-bridged silsesquioxane with dangling amino groups and its CO2adsorption performance
Authors: Quang Dang Viet , Dindi Abdallah , Al-Ali Khalid , Abu-Zahra Mohammad R. M.
Published: October 2018

Amine-bridged silsesquioxane with dangling amino groups was prepared by a hydrolysis and condensation process without using any template or structure-directing agent.
Undoped ZnO electrodes for low-cost indoor organic photovoltaics
Authors: Goo Ji Soo , Lee Jung-Hoon , Shin Sang-Chul , Park Jin-Seong , Shim Jae Won
Published: October 2018

OPVs with undoped ZnO electrodes showed excellent indoor performance with an efficiency of 9.5 ± 0.3% under an LED.
Bacterial adaptability of enzyme and pH dual-responsive surface for infection resistance
Authors: Wang Xianghong , Song Lingjie , Zhao Jie , Zhou Rongtao , Luan Shifang , Huang Yubin , Yin Jinghua , Khan AtherFarooq
Published: October 2018

A major challenge in antibacterial surface preparation is the elaborated implement of controlled antibacterial agent delivery on demand. We present a bacterial hyaluronidase (HAase) and pH dual-responsive antimicrobial surface, with excellent biocompatibility under physiological conditions and releasing vancomycin (Van) once bacteria invade.
A NIR fluorescent probe for the detection and visualization of hydrogen sulfide using the aldehyde group assisted thiolysis of dinitrophenyl ether strategy
Authors: Qian Ming , Zhang Liuwei , Pu Zhongji , Xia Jing , Chen Lili , Xia Ying , Cui Hongyan , Wang Jingyun , Peng Xiaojun
Published: October 2018

A NIR fluorescent probe exploiting the aldehyde group assisted thiolysis of dinitrophenyl ether strategy for H2S imaging in cells, tissues and mice.
Temperature sensitive cross relaxation between Er3+ ions in laminated hosts: a novel mechanism for thermochromic upconversion and high performance thermometry
Authors: Huang Feng , Yang Ting , Wang Shaoxiong , Lin Lin , Hu Tao , Chen Daqin
Published: October 2018

Cross-relaxation of rare earth ions in laminated structured hosts, and their temperature sensing properties.
Negative and positive photodielectric effects in quantum paraelectric BaFe12O19 single crystals
Authors: Yin L. H. , Hu L. , Yang J. , Teng P. , Song W. H. , Dai J. M. , Zhu X. B. , Sun Y. P.
Published: October 2018

Low-temperature negative and high-temperature positive photodielectric effects were observed in quantum paraelectric BaFe12O19 single crystals.
Transient fiber-shaped flexible electronics comprising dissolvable polymer composites toward multicolor lighting
Authors: Sun Tao , Xiu Fei , Zhou Zhe , Ban Chaoyi , Ye Tengyang , Ding Yamei , Liu Juqing , Huang Wei
Published: October 2018

Dissolvable and flexible light emitting fibers toward multicolor lighting are fabricated via an all-solution processing method.
Therapeutic strategies to target microbial protein–glycosaminoglycan interactions
Authors: Almer Johannes , Gesslbauer Bernd , Kungl Andreas J.
Published: October 2018

Glycans are involved in a plethora of human pathologies including infectious diseases. Especially, glycosaminoglycans (GAGs), like heparan sulfate and chondroitin sulfate, have been found to be involved in different crucial stages of microbial invasion. Here, we review various therapeutic approaches, which target the interface of host GAGs and microbial proteins and discuss their limitations and challenges for drug development.
Next-generation flexible formats of VNAR domains expand the drug platform's utility and developability
Authors: Ubah Obinna C. , Buschhaus Magdalena J. , Ferguson Laura , Kovaleva Marina , Steven John , Porter Andrew J. , Barelle Caroline J.
Published: October 2018

Therapeutic mAbs have delivered several blockbuster drugs in oncology and autoimmune inflammatory disease. Revenue for mAbs continues to rise, even in the face of competition from a growing portfolio of biosimilars. Despite this success, there are still limitations associated with the use of mAbs as therapeutic molecules. With a molecular mass of 150 kDa, a two-chain structure and complex glycosylation these challenges include a high cost of goods, limited delivery options, and poor solid tumour penetration. There remains an urgency to create alternatives to antibody scaffolds in a bid to circumvent these limitations, while maintaining or improving the therapeutic success of conventional mAb formats. Smaller, less complex binders, with increased domain valency, multi-specific/paratopic targeting, tuneable serum half-life and low inherent immunogenicity are a few of the characteristics being explored by the next generation of biologic molecules. One novel ‘antibody-like’ binder that has naturally evolved over 450 million years is the variable new antigen receptor (VNAR) identified as a key component of the adaptive immune system of sharks. At only 11 kDa, these single-domain structures are the smallest IgG-like proteins in the animal kingdom and provide an excellent platform for molecular engineering and biologics drug discovery. VNAR attributes include high affinity for target, ease of expression, stability, solubility, multi-specificity, and increased potential for solid tissue penetration. This review article documents the recent drug developmental milestones achieved for therapeutic VNARs and highlights the first reported evidence of the efficacy of these domains in clinically relevant models of disease.
Overview of finger friction and tactile perception
Authors: Zhou Xue , Mo Ji Liang , Jin Zhong Min
Published: October 2018

A tribological phenomenon usually occurs when fingers move against object surfaces. Friction plays an essential role during this process as well as in the corresponding tactile perception. This work focuses on an overview of finger friction and tactile perception, particularly from a synergistic perspective. A wealth of literature was analysed to summarise the current trend in research methods and contents in this area. The corresponding gaps in earlier studies and a trend analysis are provided in this study.
Butterworth transfer function with the equalised group delay response in the maximally flat sense
Authors: Stojanović N. , Krstić I. , Stamenković N. , Perenić G.
Published: October 2018

An effective method for the design of the continuous‐time all‐pass network for the low‐pass filter group delay response equalisation is presented in this Letter. Since the method is derived from the maximally flat conditions at the origin of the group delay response's rational function, the cascade connection of the designed all‐pass network and low‐pass filter exhibits a constant group delay response at the origin in the flat sense. Illustrative examples regarding group delay equalisation of the Butterworth filters are given.
180° rotationally invariant polar code
Authors: Lee Arim , Oh Wangrok
Published: October 2018

Non‐data‐aided (NDA) carrier phase recovery (CPR) is one of simple CPR algorithms which simply rotates received symbols to the nearest constellation point. Unfortunately, when the NDA CPR is used with M‐ary phase shift keying, it suffers inherent M‐fold phase ambiguity and thus the phase ambiguity must be resolved. On the other hand, the generator matrix of polar code can be obtained with the Kronecker product of a lower triangular matrix. Hence, the Hamming weights of all columns of are given by non‐negative integer powers of 2. Based on this observation, an rotationally invariant polar code suitable for digital communication systems employing binary phase shift keying and NDA CPR is proposed. The proposed polar code offers virtually identical performance under both and carrier phase offsets to that of conventional polar code with perfect CPR with identical encoding and decoding complexities.
Miniature dual‐band bandpass filter using modified quarter‐wavelength SIRs with controllable passbands
Authors: Ren Baoping , Ma Zhewang , Liu Haiwen , Guan Xuehui , Wen Pin , Wang Xiaolong , Masataka Ohira
Published: October 2018

A modified quarter‐wavelength (λ/4) stepped‐impedance resonator (SIR) is proposed to design a miniature dual‐band bandpass filter (BPF). The proposed λ/4 SIR has two individually controllable resonances for constructing dual passbands. Moreover, two independent geometrical parameters are adopted to realise individual adjustment of the coupling strengths between two adjacent λ/4 SIRs at the dual passbands. As a result, both the centre frequencies and bandwidths of the two passbands of the filter can be individually designed. Furthermore, multiple transmission zeros are created by the introduced source‐load coupling, which improves highly the selectivity of both passbands. The dual‐band BPF is designed at 2.35 and 5.8 GHz, and its simulated and measured responses are presented and show good agreement.
Irregular LDPC‐polar concatenation scheme with designed scaling factors
Authors: Zhang Xueting , Chen Shaoping , Liu Yingzhuang
Published: October 2018

In this Letter, a product concatenation scheme of systematic polar codes with irregular low‐density parity check (LDPC) codes is proposed. The proposed scheme may take advantage of the good error‐correction capability of irregular LDPC codes and superior error floor performance of polar codes. The joint belief propagation algorithm is employed, where scaling factors are introduced to manipulate the belief messages exchanged between constituent decoders, such that a fast convergence and a low BER performance may be achieved. Simulations are presented to validate its effectiveness.
Robust global consensus tracking of linear multi‐agent systems with input saturation via scheduled low‐and‐high gain feedback
Authors: Chu Hongjun , Chen Jianliang , Wei Qinglai , Zhang Weidong
Published: October 2018

This study deals with the protocol design for achieving robust global consensus tracking of multi‐agent systems. Agent dynamics are described as general linear systems with actuator saturation and input additive uncertainties and disturbances. Via developing a scheduled low‐and‐high gain design technique, the state feedback protocol is proposed, under which global consensus tracking and disturbance rejection for such systems can be achieved under the mild assumptions on agent dynamics and network topology. This result is further extended to the case of the reduced‐order observer‐based protocol design, with the help of the special coordinate basis approach. Finally, the advantages of the proposed protocols are illustrated by a numerical simulation.
Pavement network reliability: a dual‐network based on fuzzy set methodology
Authors: Wang Xingju , Gou Yang , Han Zhe , Zhang Zhanmin
Published: October 2018

Pavement Management System (PMS) is used to conduct efficient pavement management. Since the pavement network is generally large and complex in scale, the reliability of the pavement network cannot be easily determined by applying conventional serial or parallel reliability models, or even a combination of the two. The objective of this paper is to propose a novel model by employing fuzzy set theory and dual‐network method to calculate the relative importance of each pavement route and estimate the reliability of a pavement network. A fuzzy condition model is developed to describe the condition state of pavement management segments, pavement links, pavement routes, and eventually the whole network. The spatial weight of each pavement route is represented by the node degree of the corresponding dual‐network. A case study is conducted by using the pavement network of Travis County, Texas, to illustrate the applicability of the proposed methodology. The results show that the model is able to calculate the relative importance of each route and determine the reliability of the given pavement network. This paper could help transportation agencies obtain more insight information on relative importance of each roadway and make more effective decisions on pavement network maintenance with a limited budget.
CB‐MAC: a novel cluster‐based MAC protocol for VANETs
Authors: Shahen Shah A.F.M. , Ilhan Haci , Tureli Ufuk
Published: October 2018

Due to relative mobility, topology changes rapidly with frequent link breakage in vehicular ad hoc networks (VANETs). Clustering VANETs into small groups limits channel contention and controls the network topology efficiently. In this study, a novel cluster‐based medium access control (CB‐MAC) protocol is proposed for VANETs. The cluster formation process is defined. Moreover, cluster head election and cluster merging processes are described for efficient communication in the cluster as well as out of the cluster. The mechanism defined in IEEE 802.11 standard is specially designed for only direct communications and is not suitable for cluster‐based communications. Therefore, new control packets are introduced and the existing control packet format is modified to support cluster‐based communications. For effective MAC protocol design, the request to send (RTS)/clear to send (CTS) mechanism is not used for safety messages which are of broadcast nature. On the other hand, the RTS/CTS mechanism is used for non‐safety data delivery to eliminate hidden node problem. Markov chain model‐based analytical model is presented to explore the performance of the proposed CB‐MAC protocol. The proposed protocol is validated by numerical studies. The numerical results exhibit that the proposed CB‐MAC protocol improves system performance and satisfies the delay constraint of 100 ms for safety messages.
Design of wide‐area POD with resiliency using modified DEA for power systems with high penetration of renewable energy
Authors: Setiadi Herlambang , Mithulananthan Nadarajah , Shah Rakibuzzaman
Published: October 2018

Recently, the electromechanical oscillations are becoming the primary concerns in power grids due to the integration of renewable energy generations (REGs). The inherent characteristics of REGs, e.g. low or no inertia, stochastic generation, could lead to the lower damping margin in power systems. A supplemental control such as power system stabiliser or power oscillation damping (POD) controller is widely applied to augment the damping margin in power systems. However, the PSS or POD using local signal is not adequate to damp the oscillation contributed from different sources. Hence, a wide‐area damping controller can be employed in this context. Nonetheless, the wide‐area controller suffers from communication failure. Therefore, the wide‐area controller with resilient to communication failures is inevitable. This study proposed a wide‐area POD design method considering resiliency. A modified differential evolution algorithm is employed to synthesise the wide‐area damping control. The two‐area and Java‐Indonesian (three‐area) power systems are used to evaluate the performance of the proposed controller for oscillation damping. From the results, it is evident that the critical mode(s) of the system successfully damped by employing the proposed controller. It is also found that the proposed controller is robust against communication failures.
IGDT‐based economic dispatch considering the uncertainty of wind and demand response
Authors: Dai Xuemei , Wang Ying , Yang Shengchun , Zhang Kaifeng
Published: October 2018

Integration of wind generation and demand response (DR) poses challenges for the power system operation due to their uncertain characteristics. In this study, an economic dispatching method considering the uncertainties of wind and DR is proposed. The method based on the information gap decision theory (IGDT) can be used to evaluate risks associated with uncertainties from risk averse (RA) and risk‐seeking (RS) perspectives. The RA IGDT‐based model can provide maximum tolerable robustness region for the required cost target. The RS IGDT‐based model can help achieve the lowest operation costs with desired uncertainties. The proposed model is bi‐level. The upper level subproblem aims to maximise (minimise) the allowable uncertainty level to satisfy the pre‐determined cost target, while the lower level subproblem is to maximise (minimise) possible cost considering the uncertainties. The bi‐level model is then transformed into a single level mixed integer linear programming problem that can be solved through commercial solves. Finally, the authors evaluate the performance of the IGDT‐based approach by simulations on the modified 6‐bus and IEEE 118‐bus systems. The results show that the proposed approach can provide suggestions for system operators to make appropriate scheduling plan based on the expected cost targets and risk preferences.
Design and development of a novel centrifuge ablative pyrolysis approach for biomass conversion to bio-oil and bio-char
Authors: Gupta Murlidhar , McFarlan Andrew , Nguyen Leslie , Preto Fernando
Published: October 2018

Pyrolysis has evolved as a key pre-treatment step to produce renewable fuels and chemicals from agricultural and forestry residues. In the past few years, there have been different directions in the development of pyrolysis reactors. For example, in vortex and cyclone approaches, biomass particles are suspended in a flow of high supersonic velocities to ensure enough centrifugal forces for pressing the particles against the heated reactor surface. Although simple in design, the requirement of large volumes of carrier gases necessitates cumbersome downstream gas separation, resulting in thermodynamic penalties and higher capital equipment costs. In ablative systems, with little or no carrier gases, the key challenge relates to using an appropriate mechanism to continuously apply forces on biomass particles during pyrolysis. In a recent alternative approach, thermo-mechanical rotors at very high rpm have been used to create the required centrifugal forces for pressing the biomass particles against the heated walls of a concentric shell. In the current approach, a modular centrifuge pyrolysis system has been designed using Biot and Thiele numbers as key constraints for characterizing ablative regimes. Unlike other centrifuge pyrolysis reactors, the novel rotor mechanism incorporated in this reactor system facilitates constant centrifugal force as well continuous propagation of biomass feeds. The 10 kg/hr thermo-mechanical pyrolysis system has been successfully commissioned using hardwood sawdust. Properties of bio-oil and bio-char produced in this new reactor have been compared to products from fluid bed pyrolysis system. In addition to its compact and modular design suitable for mobile pyrolysis units, it can be operated in variable regimes of pyrolysis, e.g., slow to fast modes, allowing adjustable product distribution.
Partial deoxygenation of biomass derived pyrolysis liquids
Authors: Gupta Murlidhar , Monnier Jacques , Turriff Eric , Boyd Mark
Published: October 2018

Biomass pyrolysis liquids (also known as bio-oil), are derived from renewable lignocellulosic biomass residues by fast pyrolysis process. These second-generation oxygenated hydrocarbon resources have the potential to partially substitute for petroleum-derived feedstocks and thus enhance the economic and environmental sustainability of our natural resources. However, in contrast to petroleum fuels, biomass-derived pyrolysis liquids contain a large amount of oxygen, usually 40-50% wt% (wet basis). This undesirable high oxygen content in pyrolysis liquids is considered as the primary reason for its high polarity, high acidity, lower stability, lower energy density and very low miscibility with conventional crude refining feedstocks. There are two major pathways for upgrading the pyrolysis liquids. While hydrodeoxygenation route is one of the most explored options, it requires production and supply of large amounts of expensive hydrogen at high pressures, mandating large and centralized upgrading plants, and thus large capital investment. In this paper, we discuss an alternative method of pyrolysis liquid upgrading, using cheap and affordable hydrogen donor additives and catalysts to promote partial deoxygenation at near atmospheric pressure. This approach is preferably to be used as a pre-treatment and stabilizing method for pyrolysis liquids in the close vicinity of remote biomass pyrolysis plants. The pre-treated oil, then can be shipped for further hydrocracking process in a centralized co-processing facility. Preliminary results from the initial proof of concept experiments involving a 200 g/h gas-phase continuous fast catalytic cracking system with continuous coke removal to enhance deoxygenation performance are presented. These results indicate positive impact of catalyst bed on quality and yield of the upgraded bio-oil product in terms of pH, viscosity, degree of deoxygenation, oil yield and concentration of hydrogen in the off gases.
Baikal-GVD: status and prospects
Authors: Avrorin A.D. , Avrorin A.V. , Aynutdinov V.M. , Bannash R. , Belolaptikov I.A. , Brudanin V.B. , Budnev N.M. , Doroshenko A.A. , Domogatsky G.V. , Dvornický R. , Dyachok A.N. , Dzhilkibaev Zh.-A.M. , Fajt L. , Fialkovsky S.V. , Gafarov A.R. , Golubkov K.V. , Gres T.I. , Honz Z. , Kebkal K.G. , Kebkal O.G. , Khramov E.V. , Kolbin M.M. , Konischev K.V. , Korobchenko A.P. , Koshechkin A.P. , Kozhin V.A. , Kulepov V.F. , Kuleshov D.A. , Milenin M.B. , Mirgazov R.A. , Osipova E.R. , Panfilov A.I. , Pan’kov L.V. , Petukhov D.P. , Pliskovsky E.N. , Rozanov M.I. , Rjabov E.V. , Rushay V.D. , Safronov G.B. , Simkovic F. , Shoibonov B.A. , Solovjev A.G. , Sorokovikov M.N. , Shelepov M.D. , Suvorova O.V. , Shtekl I. , Tabolenko V.A. , Tarashansky B.A. , Yakovlev S.A. , Zagorodnikov A.V. , Zurbanov V.L.
Published: October 2018

Baikal-GVD is a next generation, kilometer-scale neutrino telescope under construction in Lake Baikal. It is designed to detect astrophysical neutrino fluxes at energies from a few TeV up to 100 PeV. GVD is formed by multi-megaton subarrays (clusters). The array construction started in 2015 by deployment of a reduced-size demonstration cluster named "Dubna" . The first cluster in it’s baseline configuration was deployed in 2016, the second in 2017 and the third in 2018. The full-scale GVD will be an array of ~10.000 light sensors with an instrumented volume about of 2 cubic km. The first phase (GVD-1) is planned to be completed by 2020-2021. It will comprise 8 clusters with 2304 light sensors in total. We describe the design of Baikal-GVD and present selected results obtained in 2015 - 2017.
TAIGA - a hybrid array for high energy gamma astronomy and cosmic ray physics
Authors: Budnev N. , Astapov I. , Bezyazeekov P. , Boreyko V. , Borodin A. , Brueckner M. , Chiavassa A. , Dyachok A. , Fedorov O. , Gafarov A. , Garmash A. , Gorbunov N. , Grebenyuk V. , Gress O. , Gress T. , Grishin O. , Grinyuk A. , Haungs A. , Hiller R. , Horns D. , Huege T. , Kalmykov N. , Kazarina Y. , Kindin V. , Kiryuhin S. , Kirilenko P. , Kleifges M. , Kokoulin R. , Kompaniets K. , Korosteleva E. , Kostunin D. , Kozhin V. , Kravchenko E. , Kuzmichev L. , Lemeshev Yu. , Lenok V. , Lubsandorzhiev B. , Lubsandorzhiev N. , Mirgazov R. , Mirzoyan R. , Monkhoev R. , Osipova E. , Pakhorukov A. , Panasyuk M. , Pankov L. , Petrukhin A. , Poleschuk V. , Popescu M. , Popova E. , Porelli A. , Postnikov E. , Prosin V. , Ptuskin V. , Rjabov E. , Rubtsov G. , Pushnin A. , Sagan Y. , Sabirov B. , Samoliga V. , Schröder F. , Semeney Yu. , Silaev A. , Silaev A. , Sidorenkov A. , Skurikhin A. , Slunecka V. , Sokolov A. , Spiering C. , Sveshnikova L. , Tabolenko V. , Tarashansky B. , Tkachenko A. , Tkachev L. , Tluczykont M. , Wischnewski R. , Zagorodnikov A. , Zhurov D. , Zurbanov V. , Yashin I.
Published: October 2018

The physics motivations and advantages of the new TAIGA (Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy) detector are presented. TAIGA aims at gamma-ray astronomy at energies from a few TeV to several PeV, as well as cosmic ray physics from 100 TeV to several EeV. For the energy range 30 – 200 TeV the sensitivity of 10 km2 area TAIGA array for the detection of local sources is expected to be 5 × 10-14 erg cm-2 sec-1 for 300 h of observations. Reconstruction of the given EAS energy, incoming direction and its core position, based on the timing TAIGA-HiSCORE data, allows one to increase a distance between the IACTs up to 600-1000 m. The low investments together with the high sensitivity for energies ≥ 30-50 TeV make this pioneering technique very attractive for exploring the galactic PeVatrons and cosmic rays. At present the TAIGA first stage has been constructed in Tunka valley, 50 km West from the Lake Baikal. The first experimental results of the TAIGA first stage are presented.
Critical temperatures in extensions of Higgs sector
Authors: Allahverdieva Aytadzh E.k. , Dolgopolov Mikhail V. , Gurskaya Albina V. , Rykova Elza N.
Published: October 2018

In this paper the control parameters of the Higgs potential are considered in the framework of supersymmetric models MSSM and Next-to-MSSM. The determination of these parameters is an important part related to the explanation of the CP violation evidence and electroweak phase transition evolution from the energy of the supersymmetry scale to the standard model energy scale. There is a discussion here on the problem of violation of CP invariance and its effect on the Higgs potential control parameters determination and the dark matter experimental constraints. Also the problem of determining the Potential ↔ Free Energy parameters from the points of temperature field theory and critical temperatures view is considered.
The recipe to search for anomalous Wtb couplings in tWb associated production process.
Authors: Boos Eduard , Bunichev Viacheslav , Vorotnikov Georgi , Dudko Lev , Myagkov Igor , Perfilov Maxim
Published: October 2018

The impact of anomalous Wtb couplings on tWb process of the single top quark production has been probed in different schemes of tWb modeling. A special attention devotes to influence of the particular schemes to the anomalous couplings sensitivity. The distributions of representative variables demonstrate different behaviour in different simulation schemes, therefore the correct probe for anomalous Wtb couplings require specific approach to simulate BSM contribution. Special approach to search for BSM contribution in the off-shell tWb process is proposed in this paper. The approach is based on the kinematic separation of the double and single resonant contributions by means of neural network. The specific BSM properties are considered separately for the double and single resonant events. Such approach allows to add information on the anomalous Wtb coupling from simultaneous consideration of the tt¯ (double resonant) and tWb (off-shell, single resonant) contribution of tWb processes and therefore can improve the sensitivity to the anomalous Wtb couplings.
Top FCNC searches at HL-LHC with the CMS experiment
Authors: Mandrik Petr ,   on behalf of the CMS Collaboration
Published: October 2018

The Large Hadron Collider is the world’s largest and highest centerof- mass energy particle accelerator. During the Phase I operation it is expected that the LHC operated at a centre-of-mass energy of 13 TeV will deliver to the CMS experiment total integrated luminosity of ~300 fb-1 till 2023. The High Luminosity LHC upgrade is expected to run at a centre-of-mass energy of 14 TeV and will allow ATLAS and CMS to collect integrated luminosities of the order of 300 fb-1 per year, and up to 3000 fb-1 during the HL-LHC projected lifetime of ten years. The large expected integrated luminosity enables the exploration of the multi-TeV scale by searches for particles with high masses as well as by investigation of processes with very low cross sections such as Flavor-Change Neutral Current interactions in top quark sector. In this report we present a proposal for the top quark FCNC searches at HL-LHC based on Monte-Carlo simulation of the upgraded CMS detector.
Differential distributions in rare four-leptonic B-decays.
Authors: Danilina Anna , Nikitin Nikolay
Published: October 2018

The branching ratios and differential distributions for the fourleptonic decays B- → μ+μ- νe e-, B- → e+e- νμ μ- and B- → μ+ νμ μ-μ- are calculated within the Standard Model. The contributions of the virtual photon emission from the b- and u- quarks and the bremsstrahlung contribution were taken into account. The resonances contributions were calculated using the vector dominance model. In this paper we present the differential distributions for the B- → μ+μ- νe e- decay obtained by two methods. Testing the lepton universality in rare multileptonic decays of charged and neutral B mesons are discussed.
Equivalent photons at the LHC: pp(γγ) → ppl+l-, Pb Pb (γγ) → Pb Pb l+l-
Authors: Vysotsky Mikhail , Zhemchugov Evgenii
Published: October 2018

The Large Hadron Collider is considered as a photon-photon collider with the photons produced in ultraperipheral collisions of protons or heavy ions. The equivalent photon approximation is applied to derive analytical formulae for the fiducial cross sections of reactions pp(γγ) → pp μ+μ- and Pb Pb (γγ) → Pb Pb μ+μ-. The results are compared to the measurements reported by the ATLAS collaboration.
Photon splitting bound on Lorentz Violation in QED from multi-TeV photon observation.
Authors: Astapov Konstantin , Satunin Petr , Kirpichnikov Dmitry
Published: October 2018

We calculate the width of photon splitting to three photons in a special model of quantum electrodynamics with broken Lorentz invariance. This process may lead to a sharp cut-off in a photon spectrum of a given astrophysical source. Analysing experimental data, we set a constraint on Lorentz-violating mass scale from the absence of such cut-off in the Crab Nebula spectrum.
Possible explanation of the neutrino signal from SN1987A detected with the LSD
Authors: Agafonova Natalia , Fulgione Walter , Malgin Alexey , Manukovskiy Konstantin , Ryazhskaya Olga , Yen Stanley , Yudin Andrey
Published: October 2018

On February 23 1987 in 2:52 UT the neutrino telescope LSD under Mont Blanc detected neutrino signal, which could not be explained within the framework of the standard collapse model. We show that the LSD signal could be a consequence of the detection of gamma-quanta emitted from neutron-capture reactions on by iron nuclei contained in the composition of the experimental setup. Neutrons are produced in neutrino-nuclei reactions in the surrounding granite rock and steel structures of the detector.
On the relation between pole and running heavy quark masses beyond the four-loop approximation
Authors: Kataev A. L. , Molokoedov V. S.
Published: October 2018

The effective charges motivated method is applied to the relation between pole and M̅S̅-scheme heavy quark masses to study high order perturbative QCD corrections in the observable quantities proportional to the running quark masses. The non-calculated five- and six-loop perturbative QCD coefficients are estimated. This approach predicts for these terms the sign-alternating expansion in powers of number of lighter flavors nl, while the analyzed recently infrared renormalon asymptotic expressions do not reproduce the same behavior. We emphasize that coefficients of the quark mass relation contain proportional to π2 effects, which result from analytical continuation from the Euclidean region, where the scales of the running masses and QCD coupling constant are initially fixed, to the Minkowskian region, where the pole masses and the running QCD parameters are determined. For the t-quark the asymptotic nature of the non-resummed PT mass relation does not manifest itself at six-loops, while for the b-quark the minimal PT term appears at the probed by direct calculations four-loop level. The recent infrared renormalon based studies support these conclusions.
From LO to NLO in the parton Reggeization approach
Authors: Nefedov Maxim , Saleev Vladimir
Published: October 2018

We present recent developments of the parton Reggeization approach (PRA), which is based on high-energy factorization of hard processes in the multi-Regge kinematics and Lipatov’s effective theory of Reggeized gluons and Reggeized quarks. The scheme of calculations in the leading order (LO) of the PRA is discussed. We present important examples of LO PRA applications for cross section calculations of multi-scale hard processes, such as pair production ofBB¯-mesons, pair production of photons, and pair production of jets. Also the problem of matching of NLO calculations in PRA with NLO results in the Collinear Parton Model is discussed.
Recent LHC/TOTEM data challenging the standard Regge pole theory
Authors: Bence Norbert , Jenkovszky László , Szanyi István
Published: October 2018

We analyse the recently discovered phenomena in elastic protonproton scattering at the LHC: the low-|t| “break” (departure from the exponential behaviour of the diffraction cone), the accelerating rise with energy of the forward slope B(s), the absence of secondary dips and bumps on the cone and the role of the odderon in the forward phase of the amplitude, ρ(13 TeV) = 0:09 ± 0:01, especially its contribution at the dip region, measured recently by TOTEM. The dip at 13 TeV seems to become more shallow with respect to lower energies, and we attribute this important new phenomena to the odderon contribution. These findings call for a revision of the standeard Regge-pole theory.
Short- and long-range rapidity correlations in the model with a lattice in transverse plane
Authors: Vechernin Vladimir
Published: October 2018

In the framework of the quark-gluon string model we consider the various fluctuation and correlation observables used in the analysis of the multiparticle production in hadronic interactions at high energy. We express these observables through the fundamental string characteristics and analyze their resulting properties: the dependence on the width of observation window(s), the range of the correlation in rapidity, the intensive or strongly intensive behavior. To take into account the influence of a string fusion processes on the string characteristics and on the behavior of the observables. we use the version of string model with a lattice (grid) in the impact parameter plane. In particular we show that the observable between multiplicities in two acceptance windows separated in rapidity, which is a strongly intensive in the case with independent identical strings, loses this property, when we take into account the string fusion and the formation of strings of a few different types takes place in a collision.
Anomalous transport phenomena and momentum space topology
Authors: Zubkov Mikhail , Khaidukov Zakhar
Published: October 2018

Using the derivative expansion applied to the Wigner transform of the two - point Green function this is possible to derive the response of various nondissipative currents to the external gauge fields. The corresponding currents are proportional to the momentum space topological invariants. This allows to analyse systematically various anomalous transport phenomena including the anomalous quantum Hall effect and the chiral separation effect. We discuss the application of this methodology both to the solid state physics and to the high energy physics.
Electric current induced by an external magnetic field in the presence of electroweak matter
Authors: Dvornikov Maxim
Published: October 2018

We study the generation of an electric current, along the external magnetic field, of fermions, interacting by parity violating electroweak forces with background matter. First, we discuss the situation of massive particles with nonzero anomalous magnetic moments. We show that the induced current is vanishing for such particles in the state of equilibrium. Then, the case of massless fermions is studied. We demonstrate that the contribution of the electroweak interaction is washed out from the expression for the current, which turns out to coincide with the prediction of the chiral magnetic effect. Our results are compared with findings of other authors.
Dense quark matter with chiral and isospin imbalance: NJL-model consideration
Authors: Khunjua Tamaz , Klimenko Konstantin , Zhokhov Roman
Published: October 2018

Isospin asymmetry is the well-known property of dense quark matter, which exists in the compact stars and is produced in heavy ion collisions. On the other hand, the chiral imbalance between left- and right- handed quarks is another highly anticipated phenomenon that could occur in the dense quark matter. To investigate quark matter under these conditions, we take into account baryon –μB, isospin –μIand chiral isospin –μI5chemical potentials and study QCD phase portrait using NJL4model generalized to two massive quarks that could condense into the pion condensation. We have shown that the chiral isospin chemical potentialμI5generates pion condensation in isospin asymmetric quark matter. Also, we have investigated discrete symmetry (duality) between chiral and pion condensates in the case of massless quarks, which stay relatively instructive even if the quarks have bare mass. To describe hot dense quark matter, in addition to the above-mentioned chemical potentials, we introduce non-zero temperatures into consideration.
Asymptotic symmetries and charges at null infinity: from low to high spins
Authors: Campoleoni Andrea , Francia Dario , Heissenberg Carlo
Published: October 2018

Weinberg’s celebrated factorisation theorem holds for soft quanta of arbitrary integer spin. The same result, for spin one and two, has been rederived assuming that the infinite-dimensional asymptotic symmetry group of Maxwell’s equations and of asymptotically flat spaces leave the S-matrix invariant. For higher spins, on the other hand, no such infinite-dimensional asymptotic symmetries were known and, correspondingly, no a priori derivation of Weinberg’s theorem could be conjectured. In this contribution we review the identification of higher-spin supertranslations and superrotations in D = 4 as well as their connection to Weinberg’s result. While the procedure we follow can be shown to be consistent in any D, no infinite-dimensional enhancement of the asymptotic symmetry group emerges from it in D > 4, thus leaving a number of questions unanswered.
On Conformally Coupled General Relativity
Authors: Arbuzov Andrej , Latosh Boris
Published: October 2018

A gravity model based on the conformal symmetry is presented. To specify the structure of the general coordinate transformations the Ogievetsky theorem is applied. The nonlinear symmetry realization approach is used. Canonical quantization is performed with the use of reparameterizationinvariant time and the Arnowitt-Deser-Misner foliation. Renormalizability of the constructed quantum gravity model is discussed.
Manifestations of Horndeski theory in binary systems with pulsars.
Authors: Avdeev Nikita , Dyadina Polina , Alexeyev Stanislav
Published: October 2018

Subclass of Horndeski gravity without Vainstein screening mechanism is tested in strong field regime of binary pulsars. Two specific cases of the Horndeski gravity are considered: the hybrid metric-Palatini f(R)-gravity and massive Brans-Dicke theory. The observational data of PSR J1738+0333, PSR J0737-3039, PSR J1012+5307 is used for obtaining constraints.
Evolution of a domain wall in expanding universe: inflation and after it
Authors: Dolgov A.D. , Godunov S.I. , Rudenko A.S.
Published: October 2018

We study the evolution of thick domain walls in the expanding universe. We have found that the domain wall evolution crucially depends on the time-dependent parameter C(t) = 1/(H(t)δ0)2, where H(t) is the Hubble parameter and δ0 is the width of the wall in flat space-time. For C(t) > 2 the physical width of the wall, a(t)δ(t), tends with time to constant value δ0, which is microscopically small. Otherwise, when C(t) ≤ 2, the wall steadily expands and can grow up to a cosmologically large size.
Intergalactic electromagnetic cascades in the magnetized Universe as a tool of astroparticle physics
Authors: Dzhatdoev Timur , Khalikov Emil , Kircheva Anna , Podlesnyi Egor , Telegina Anastasia
Published: October 2018

We review the physics of intergalactic electromagnetic cascades in the presence of the extragalactic magnetic field (EGMF). Various regimes of intergalactic electromagnetic cascades are considered depending on the number of cascade generations, the value of the cascade electron deflection angle, and the relations between the EGMF coherence length, typical cascadeγ-ray mean free path, and electron energy loss length. We also review contemporary constraints on the EGMF parameters and explore the sensitivity of variousγ-ray instruments to the EGMF parameters.
Cathodic protection of steel in concrete – experience and overview of 30 years application
Authors: Polder Rob , Peelen Willy
Published: October 2018

This paper presents an overview of 30 years' experience with cathodic protection of steel in concrete in The Netherlands. Principles and practical aspects of CP and its design and installation are presented. Three phases have passed from the late 1980s until present: pioneering, development and maturity. In the first period CP was mainly applied to precast elements corroding due to mixedin chlorides. The parties involved worked together to draw up a Technical Guideline. In the second period, application to bridges came up, including post-tensioned structures, which was then innovative. Furthermore, galvanic anode systems were introduced. In the third period, CP became a fully accepted method of securing durability and safety. Renewed collaboration led to a database that allowed analysis of various aspects of CP system working life, including shortcomings in early systems. Major successes and lessons learned will be presented. Technical and non-technical developments are highlighted and some recent innovative CP components and systems are discussed.
Fiber Reinforced Concrete for repairing and strengthening RC structures: some recent advancements
Authors: Plizzari Giovanni A.
Published: October 2018

Enhancement of seismic behaviour of existing structures, both masonry or reinforced concrete, is a key issue for future technical activities in many Western Countries, since construction of new buildings has decreased in favour of an increased attention to the structural rehabilitation and re-use of existing buildings. The development of innovative repairing, strengthening, and retrofitting techniques is, therefore, a crucial topic to improve the structural safety of existent constructions. Fibre Reinforced Concrete (FRC) may now be particularly efficient in these cases, due to the high toughness provided by fibres that may reduce or avoid the use of conventional reinforcement.This paper presents the results of two experimental research studies carried out at the University of Brescia, concerning the use of FRC as the principal reinforcing material. The first study aims at assessing the structural response, under cyclic horizontal loads, of a full scale (1:1) Unreinforced Masonry (URM) building retrofitted with Steel Fibre Reinforced Mortar (SFRM) as external plaster. The second study concerns the seismic retrofitting of a scaled (1:4) reinforced concrete bridge pier by means of a High Performance Fibre Reinforced Concrete (HPFRC) jacketing. In both cases, repair material is applied in thin layers, due to the high mechanical properties compared to those of the respective substrates, with the addition of a limited amount of traditional reinforcement, placed only on the most stressed sections.
Evaluation of the resistance of CAC and BFSC mortars to biodegradation: laboratory test approach
Authors: Aboulela Amr , Peyre-Lavigne Matthieu , Patapy Cédric , Bertron Alexandra
Published: October 2018

Biodeterioration of cementitious materials in sewer networks is a major concern for health and economic reasons. Essentially, it is due to the biological oxidation of H2S into H2SO4 leading to a local progressive dissolution of the cementitious matrix and the precipitation of expansive products likely to provoke cracks. However, it is widely known that CAC has a better performance in such environments but the mechanisms are not very well understood. Nevertheless, previous studies focused mainly on measuring the mass loss of the specimens accompanied with little information on the chemical alteration of the cementitious matrix. This study aims to compare the performance of CAC and BFSC mortars in sewer conditions using laboratory test (BAC-test). Leaching kinetics were evaluated by concentrations measurements of cementitious cations in the leached solutions and of sulphate production by the microorganisms. Moreover, SEM observations coupled with EDS analyses allowed the identification of the chemical alteration of the cementitious matrix.