bluuebunny/crossref_metadata_2025 huggingface dataset:
Efficient Ohmic contacts and built-in atomic sublayer protection in MoSi2N4 and WSi2N4 monolayers
Authors: Wang Qianqian , Cao Liemao , Liang Shi-Jun , Wu Weikang , Wang Guangzhao , Lee Ching Hua , Ong Wee Liat , Yang Hui Ying , Ang Lay Kee , Yang Shengyuan A. , Ang Yee Sin
Published: August 2021

Metal contacts to two-dimensional (2D) semiconductors are often plagued by the strong Fermi level pinning (FLP) effect which reduces the tunability of the Schottky barrier height (SBH) and degrades the performance of 2D semiconductor devices. Here, we show that MoSi2N4 and WSi2N4 monolayers—an emerging 2D semiconductor family with exceptional physical properties—exhibit strongly suppressed FLP and wide-range tunable SBH. An exceptionally large SBH slope parameter of S ≈ 0.7 is obtained which outperforms the vast majority of other 2D semiconductors. Such intriguing behavior arises from the septuple-layered morphology of MoSi2N4 and WSi2N4 monolayers in which the semiconducting electronic states are protected by the outlying Si–N sublayer. We identify Ti, Sc, and Ni as highly efficient Ohmic contacts to MoSi2N4 and WSi2N4 with zero interface tunneling barrier. Our findings reveal the potential of MoSi2N4 and WSi2N4 as a practical platform for designing high-performance and energy-efficient 2D semiconductor electronic devices.
Electrochemical strategies for the detection of cTnI
Authors: Yuan Zhipeng , Wang Li , Chen Jun , Su Weiguang , Li Anqing , Su Guosheng , Liu Pengbo , Zhou Xiangxiang
Published: August 2021

Here, we organize all the pictures that appear in the text separately.
Cell-free riboswitches
Authors: Tabuchi Takeshi , Yokobayashi Yohei
Published: August 2021

Synthetic riboswitches can be used as chemical gene switches in cell-free protein synthesis systems. We provide a current perspective on the state of cell-free riboswitch technologies and their future directions.
The alloying-induced electrical conductivity of metal–chalcogenolate nanowires
Authors: Ke Feng , Zhou Chuanjun , Zheng Mengke , Li Hao , Bao Junjie , Zhu Chen , Song Yongbo , Xu Wen Wu , Zhu Manzhou
Published: August 2021

The introduction of copper atoms significantly changes the electronic structure of the MOC nanowires and improves their electrical conductivity.
Synthesis of a chiral metallo-capsule composed of concave molecules and chirogenesis upon fullerene binding
Authors: Yamamura Masaki , Saito Tsuyoshi , Hasegawa Toru , Nishibori Eiji , Nabeshima Tatsuya
Published: August 2021

A chiral bowl-shaped and self-assembled host containing four phosphangulene units recognizes fullerenes selectively.
Plasmonic nanorod array for effective photothermal therapy in hyperthermia
Authors: Bui Thanh Lam , Ho Ngoc Thanh , Ho Xuan Vuong Thi Thanh , Ngo Dinh Nghi , Lim Soon Hyuk , Son Sang Jun , Noh Seung Man , Joo Sang-Woo
Published: August 2021

Gold nanorod arrays inside nanopores enhance the longitudinal absorption intensities and the hyperthermia cancer cell killing under photothermal laser exposures.
Plasmonic-redox controlled atom transfer radical polymerization
Authors: Guo Yuyang , Zou Yu , Jiang Jiang
Published: August 2021

Plasmonic-ATRP has been developed in which Cu(i) species are (re)generated via photo-redox reactions both directly by hot electrons and indirectly by hot holes.
Electronic structures and properties of dianionic pentacarbonyls [TM(CO)5]2−(TM = Cr, Mo, W)
Authors: Pei Gerui , Shu Cong-Cong , Li Mengyang , Sun Zhong-Ming , Yang Tao
Published: August 2021

Stabilities, electronic structures, and vibrational and bonding properties of [TM(CO)5]2−(TM = Cr, Mo, W) have been studied and the π backdonations rather than σ donations were found to play a dominant role in stabilizing these dianions.
Pressure-induced reconstructive phase transitions, polarization with metallicity, and enhanced hardness in antiperovskite MgCNi3
Authors: Cui Yingqi , Cheng Hao , Tian Hao , Li Chenggang , Tang Yanan , Mao Ai-Jie , Kuang Xiao-Yu
Published: August 2021

Pressure induces two novel phases in MgCNi3. One is a polar metal phase and the other possesses an enhanced hardness stemming from a robust s–s electrons interaction.
The importance of finite temperature and vibrational sampling in the absorption spectrum of a nitro-functionalized Ru(ii) water oxidation catalyst
Authors: Wernbacher Anna M. , González Leticia
Published: August 2021

The influence of vibrational effects on the absorption spectra of a Ru water oxidation catalyst are shown: comparison of a nuclear ensemble approach (red, Wigner sampling) with spectrum based on a single equilibrium geometry (blue).
Water compatible supramolecular polymers: recent progress
Authors: Han Weiwei , Xiang Wei , Li Qingyun , Zhang Hanwei , Yang Yabi , Shi Jun , Ji Yue , Wang Sichang , Ji Xiaofan , Khashab Niveen M. , Sessler Jonathan L.
Published: August 2021

In this review, we summarize the chemistry of water compatible supramolecular polymers (WCSPs) based on the core supramolecular approaches at play, namely hydrogen-bonding arrays, electrostatic interactions, large π-conjugated subunits, host–guest interactions, and peptide-based systems, respectively. We discuss both synthesis and polymer structure, as well as the underlying design expectations and potential applications.
Template-free synthesis of β-NiS ball-in-ball microspheres for a high-performance asymmetrical supercapacitor
Authors: Hu Qin , Zhang Shengtao , Li Wenpo , Hao Jiangyu , Zhang Lulu , Yan Lijin , Zou Xuefeng
Published: August 2021

In this work, single-component β-NiS ball-in-ball microspheres has been easily obtained by the unique use of 2-mercaptopropionic acid (2-MPA) as the sulfur source and ethanol as the solvent.
Mechanochemical synthesis and structural analysis of trivalent lanthanide and uranium diphenylphosphinodiboranates
Authors: Fetrow Taylor V. , Daly Scott R.
Published: August 2021

Here we report how mechanochemistry was used to overcome limited solution reactivity for the synthesis of homoleptic uranium and lanthanide phosphinodiboranate complexes with weakly-coordinating (H3BPPh2BH3)1−.
Facile synthesis of Fe-doped CoP nanosheet arrays wrapped by graphene for overall water splitting
Authors: Tahmasebi Zeinab , Mohammadi Zardkhoshoui Akbar , Hosseiny Davarani Saied Saeed
Published: August 2021

Fe doped CoP nanosheet arrays wrapped by graphene (F0.25CP-G) are constructed for overall water splitting.
Zinc thiotropolone combinations as inhibitors of the SARS-CoV-2 main protease
Authors: DeLaney Christopher , Sheng Yan , Pectol D. Chase , Vantansever Erol , Zhang Hanyuan , Bhuvanesh Nattamai , Salas Isaiah , Liu Wenshe R. , Fierke Carol F. , Darensbourg Marcetta Y.
Published: August 2021

Inorganic synthesis and characterization of zinc thiotropolone complexes, computational docking studies and the influence of ligand/zinc concentrations on protease enzyme inhibition indicate a “Goldilock's” effect for most effective combinations.
Correction: Self-assembled Ti3C2 MXene and N-rich porous carbon hybrids as superior anodes for high-performance potassium-ion batteries
Authors: Zhao Ruizheng , Di Haoxiang , Hui Xiaobin , Zhao Danyang , Wang Rutao , Wang Chengxiang , Yin Longwei
Published: August 2021

Correction for ‘Self-assembled Ti3C2 MXene and N-rich porous carbon hybrids as superior anodes for high-performance potassium-ion batteries’ by Ruizheng Zhao et al., Energy Environ. Sci., 2020, 13, 246–257, DOI: 10.1039/C9EE03250A.
Geochemical controls on CO2 interactions with deep subsurface shales: implications for geologic carbon sequestration
Authors: Sharma Shikha , Agrawal Vikas , McGrath Steven , Hakala J. Alexandra , Lopano Christina , Goodman Angela
Published: August 2021

CO2 sequestration in shales is controlled by the intrinsic properties of shale and external factors shown in grey and green boxes, respectively. The adsorption capacity (orange box) is influenced by both intrinsic properties and external factors.
Chlorpyrifos in environment and food: a critical review of detection methods and degradation pathways
Authors: Nandhini A. R. , Harshiny M. , Gummadi Sathyanarayana N.
Published: August 2021

Chlorpyrifos pesticides residues in various sources and the comparision of the various detection and degradation methods of chlorpyrifos.
Mild selective oxidative cleavage of lignin C–C bonds over a copper catalyst in water
Authors: Hu Yuzhen , Yan Long , Zhao Xuelai , Wang Chenguang , Li Song , Zhang Xinghua , Ma Longlong , Zhang Qi
Published: August 2021

Selective cleavage of lignin C–C bonds to aromatic acids, phenols and aromatic aldehydes.
An anticounterfeiting technology combining an InP nanoparticle ink and a versatile optical device for authentication
Authors: Taşcıoğlu Didem , Sevim Ünlütürk Seçil , Özçelik Serdar
Published: August 2021

Counterfeiting is a growing issue and causes economic losses. Fluorescent inks containing In(Zn)P/ZnS/DDT colloidal nanoparticles are formulated and combined with a convenient optical device for authentication.
Super-ions of sodium cations with hydrated hydroxide anions: inorganic structure-directing agents in zeolite synthesis
Authors: Asselman Karel , Pellens Nick , Radhakrishnan Sambhu , Chandran C. Vinod , Martens Johan A. , Taulelle Francis , Verstraelen Toon , Hellström Matti , Breynaert Eric , Kirschhock Christine E. A.
Published: August 2021

NMR-crystallography, combining advanced NMR, diffraction and molecular modelling reveals a zundel based super-ion to template hydroxysodalite.
Mechanism of morphology variations in colloidal CuGaS2 nanorods
Authors: Keating Logan , Shim Moonsub
Published: August 2021

Morphological variation of CuGaS2 nanorods grown from Cu2−xS seeds is attributed to the growth mechanism, termed Concurrent Seed growth and Cation exchange (CSC).
Manipulating ferroelectric behaviorsviaelectron-beam induced crystalline defects
Authors: Huang Qianwei , Chen Zibin , Cabral Matthew J. , Luo Haosu , Liu Hongwei , Zhang Shujun , Li Yulan , Mai Yiu-Wing , Ringer Simon P. , Liao Xiaozhou
Published: August 2021

We show a new way to tune ferroelectric behaviors in ferroelectric nanoplates by electron beam irradiation.
Computational screening of MBene monolayers with high electrocatalytic activity for the nitrogen reduction reaction
Authors: Li Yameng , Li Lei , Huang Rao , Wen Yuhua
Published: August 2021

We explored the electrocatalytic mechanisms of N2 conversion into ammonia on six MB (M = Sc, Ti, V, Cr, Mo, and W) monolayers and screened out three MB monolayers (VB, CrB, and MoB monolayers) with high electrocatalytic activity for the NRR.
Modern methods for the synthesis of perfluoroalkylated aromatics
Authors: Castillo-Pazos Durbis J. , Lasso Juan D. , Li Chao-Jun
Published: August 2021

This review summarizes the most recent organometallic, photochemical and electrochemical methods for the synthesis of perfluoroalkylated aromatic scaffolds, a family of compounds that is omnipresent in modern commercial and research applications.
Regioselective benzoyloxylative dearomatization of naphthols by benzoyl peroxide under catalyst-free conditions
Authors: Chen Hong-Wei , Song Qin-Hua
Published: August 2021

We present herein a direct regioselective benzoyloxylative dearomatization of both α- and β-naphthols by aryl peroxide to construct α-ketol derivatives under air atmosphere, and radical inhibitor- and catalyst-free conditions at room temperature.
A reference scale of cucurbit[7]uril binding affinities
Authors: Alnajjar Mohammad A. , Nau Werner M. , Hennig Andreas
Published: August 2021

The binding of the macrocyclic host cucurbit[7]uril with selected guest molecules has been re-investigated to cover a large range in affinities (millimolar to femtomolar) and to set up a reference scale for future binding constant determinations.
The formation of benzoxacin-3-ones via intramolecular Nicholas reactions and synthesis of 8-membered heliannuols
Authors: St. Onge Brent , Green James R.
Published: August 2021

Intramolecular Nicholas reactions have been shown to give dehydrobenzoxacin-3-one-Co2(CO)6 complexes. This allows the synthesis of (±)-heliannuol K methyl ether and the formal syntheses of (±)-heliannuol K, (±)-heliannuol A, and (−)-heliannuol L.
An NH2-modified {EuIII2}–organic framework for the efficient chemical fixation of CO2 and highly selective sensing of 2,4,6-trinitrophenol
Authors: Chen Hongtai , Zhang Zhengguo , Hu Tuoping , Zhang Xiutang
Published: August 2021

An amino-functionalized microporous material of {(Me2NH2)4[Eu4(DDAC)3(HCO2)(OH2)2]·8DMF·9H2O}n with hierarchical pore voids displays efficient chemical fixation of CO2 and highly selective sensing of 2,4,6-trinitrophenol.
Olivine-type cadmium germanate: a new sensing semiconductor for the detection of formaldehyde at the ppb level
Authors: Li Jiayu , Liang Qihua , Zhang Bo , Chen Hui , Tian Xinhua , Fan Meihong , Guo Yunjia , Bai Ni , Zou Xiaoxin , Li Guo-Dong
Published: August 2021

In this study, for the first time, olivine-structured Cd2GeO4 was identified as an excellent formaldehyde sensing material, with a low detection limit of 60 ppb.
Effect of surface engineering on ethylamine-mediated plasmonic gold nanoparticle assembly
Authors: Zhou Chunyu , Sun Tao , Gong Mingfu , Xu Zhongsheng , Zhang Liang , Li Qiaoqiao , Du Mengmeng , Kang Xun , Liu Yun
Published: August 2021

This article describes a novel strategy for assembling gold nanoparticles (AuNPs) into chainlike structures and modulating their assembly by surface engineering.
Unlocking the catalytic potency of a magnetic responsive CoFe2O4/Ni-BTC MOF composite for the sustainable synthesis of tri- and tetra-substituted imidazoles
Authors: Yadav Sneha , Dixit Ranjana , Sharma Shivani , Dutta Sriparna , Arora Bhavya , Rana Pooja , Kaushik Bhawna , Rana Pooja , Adholeya Alok , Gawande Manoj B. , Sharma Rakesh K.
Published: August 2021

A CoFe2O4/Ni-BTC hybrid composite has been synthesized for the one-pot multicomponent synthesis of 2,4,5-trisubstituted and 1,2,4,5-tetrasubstituted imidazoles.
Linker depletion for missing cluster defects in non-UiO metal–organic frameworks
Authors: Lázaro Isabel Abánades , Almora-Barrios Neyvis , Tatay Sergio , Popescu Catalin , Martí-Gastaldo Carlos
Published: August 2021

Synthesis of MUV-10 in sub-stoichiometric linker conditions favours the formation of missing cluster vacancies for direct impact in their porosity.
Conversion of bile salts from inferior emulsifier to efficient smart emulsifier assisted by negatively charged nanoparticles at low concentrations
Authors: Zhang Haojie , Lv Miao , Jiang Jianzhong , Cui Zhenggang , Xia Wenshui , Binks Bernard P.
Published: August 2021

Bile salts can be converted to efficient emulsifiers assisted by a trace amount of similarly charged nanoparticles and the emulsions formed are CO2/N2 switchable at room temperature.
Mesoionic N-heterocyclic olefin catalysed reductive functionalization of CO2 for consecutive N-methylation of amines
Authors: Maji Subir , Das Arpan , Mandal Swadhin K.
Published: August 2021

Mesoionic N-heterocyclic olefin (mNHO) catalysed consecutive N-methylation of primary and secondary amines was accomplished under 1 atm CO2 pressure in the presence of 9-BBN as a reducing agent nearly at room temperature.
Solid oxide proton conductors beyond perovskites
Authors: Fop Sacha
Published: August 2021

Solid oxide proton conductors have application in hydrogen-based energy technologies. This perspective presents an overview of the structural and mechanistic aspects of proton conduction in oxide systems outside conventional perovskite conductors.
A fibrous thiazolothiazole-bridged viologen polymer for high-performance lithium-ion batteries
Authors: Chen Ling , Zhu Xiaolin , Zhang Youzhi , Gao Guangyuan , Xue Wenhao , Zhang Sen , Wang Xiujuan , Zhang Qichun , He Xiaoming
Published: August 2021

A fibrous, conjugated porous polymer P1 was synthesized with reversible one-step two-electron redox process. P1 shows a high capacity of 358.8 mA h g−1 and excellent cycling stability, which is far priority to the state-of-the-art viologen materials.
Three-dimensional ordered macroporous materials for photocatalysis: design and applications
Authors: Wen Fushan , Liu Wenliang
Published: August 2021

This review provides the recent design and application of 3DOM materials in the field of photocatalysis, inspiring new concepts for fabricating 3DOM photocatalysts for more sustainable applications.
Constructing the CoO/Co4N heterostructure with an optimized electronic structure to boost alkaline hydrogen evolution electrocatalysis
Authors: Yao Na , Fan Zhengyin , Xia Zijie , Wu Fei , Zhao Pingping , Cheng Gongzhen , Luo Wei
Published: August 2021

A CoO/Co4N heterostructure electrocatalyst has been successfully constructed and shown remarkable hydrogen evolution reaction (HER) performance and long-term stability in alkaline electrolytes.
Preventing lithium plating under extremes: an untold tale of two electrodes
Authors: Bohinsky Amy , Rangarajan Sobana P. , Barsukov Yevgen , Mukherjee Partha
Published: August 2021

Fast charging of lithium-ion cells is key to alleviate range anxiety and improve the commercial viability of electric vehicles, which is, however, limited by the propensity of lithium plating.
Correction: Novel Au inlaid Zn2SnO4/SnO2 hollow rounded cubes for dye-sensitized solar cells with enhanced photoelectric conversion performance
Authors: Li Bo , Guo Enyan , Wang Chengxiang , Yin Longwei
Published: August 2021

Correction for ‘Novel Au inlaid Zn2SnO4/SnO2 hollow rounded cubes for dye-sensitized solar cells with enhanced photoelectric conversion performance’ by Bo Li et al., J. Mater. Chem. A, 2016, 4, 466–477, DOI: 10.1039/C5TA06889D.
Correction: Recent advancements in solid electrolytes integrated into all-solid-state 2D and 3D lithium-ion microbatteries
Authors: Jetybayeva Albina , Uzakbaiuly Berik , Mukanova Aliya , Myung Seung-Taek , Bakenov Zhumabay
Published: August 2021

Correction for ‘Recent advancements in solid electrolytes integrated into all-solid-state 2D and 3D lithium-ion microbatteries’ by Albina Jetybayeva et al., J. Mater. Chem. A, 2021, 9, 15140–15178, DOI: 10.1039/D1TA02652F.
A review on diatom biosilicification and their adaptive ability to uptake other metals into their frustules for potential application in bone repair
Authors: Reid A. , Buchanan F. , Julius M. , Walsh P. J.
Published: August 2021

Diatoms are unicellular eukaryotic algae that have a distinctive siliceous cell wall (frustule) with unique architectures. These frustules are a naturally derived biomaterial, which can be chemically modified and may have potential in bone tissue engineering applications.
Reversible redox reactions in metal-supported porphyrin: the role of spin and oxidation state
Authors: Cojocariu Iulia , Carlotto Silvia , Zamborlini Giovanni , Jugovac Matteo , Schio Luca , Floreano Luca , Casarin Maurizio , Feyer Vitaliy , Schneider Claus Michael
Published: August 2021

The reduced Co(i) metal ion in the molecular array facilitates the formation of the cobalt–ligand chemical bond already at RT. We demonstrate that molecular reactivity goes beyond the sole presence of unpaired electrons in the valence shell.
A nanoscale continuous transition from the monoclinic to ferroelectric orthorhombic phase inside HfO2 nanocrystals stabilized by HfO2 capping and self-controlled Ge doping
Authors: Palade Catalin , Lepadatu Ana-Maria , Slav Adrian , Cojocaru Ovidiu , Iuga Alin , Maraloiu Valentin Adrian , Moldovan Antoniu , Dinescu Maria , Teodorescu Valentin Serban , Stoica Toma , Ciurea Magdalena Lidia
Published: August 2021

A transition from the monoclinic to ferroelectric orthorhombic phase, takes place within a region of few atomic layers of single HfO2 crystals. Atomic calculations show high stability of the ferroelectric orthorhombic phase.
Driving distraction detection based on gaze activity
Authors: Zhang Yingji , Yang Xiaohui , Feng Zhiquan
Published: August 2021

Driving distraction detection can effectively prevent the occurrence of traffic accidents. Thus, monitoring a driver's state is very important for road safety. At present, most driving distraction detection methods focus on singular aspects, such as gaze distraction or hand distraction, and rarely focus on cognitive distraction as it is difficult to detect. This study proposed a driving distraction detection method based on gaze activity. A multi‐channel convolutional neural network was used to classify the driver's gaze area and calculate the gaze activity. In cognitive distraction, the driver's gaze activity is significantly lower than that in the normal driving state. The activity thresholds via experiments have been obtained and used to determine whether drivers were in a cognitively distracted state. Through experiments, the accuracy of this method reached 92.36%. To identify driving distractions more comprehensively, a gaze distraction algorithm based on the two‐second rule has been added to the method. The experiment demonstrated that our method in combination with this algorithm improved all of the indicators (when compared to only the gaze activity algorithm), and the accuracy rate increased to 95%.
Theoretical and experimental investigation of a novel point‐focus Fresnel collector system with a novel receiver
Authors: El‐Leathy Abdelrahman , Al‐Ansary Hany , Ba‐abbad Mazen , Danish Syed Noman , AlShehri Yazid , Rizvi Arslan Abbas
Published: August 2021

Here, experimental results for testing a novel solar concentrating system are presented. The novel receiver is tested on a technology that combines the two proven concepts of solar concentrating technologies (linear Fresnel reflector (LFR) and central receiver technologies) into a new concept called focal point Fresnel collector (PFFC) with a polar sun‐tracking system. The PFFC system works by concentrating direct solar irradiation using several flat mirrors positioned over a square‐rotating surface that follows the sun. Considering the solar elevation, the reflection is achieved using the Fresnel reflection concept. Rectangular mirrors of LFR technology are discretised into small square mirrors to achieve point focusing. A concentration ratio of 600 has been achieved, which is like that of parabolic dish (PD) systems. Mathematical modelling of the system is presented along with the experimental results. Furthermore, the PFFC system with the novel receiver provides similar thermal efficiency with comparatively higher manufacturing ease than the PD system. Besides, a maximum thermal efficiency of 87% has been achieved.
Self‐healing digital‐to‐analogue converter architecture for communication equipment with ordered element‐matching technology
Authors: Chiou Jin‐Chern , Yang Tzu‐Sen
Published: August 2021

An attempt was made to establish self‐healing architecture using ordered element‐matching (OEM) technology for ageing or partially damaged components of digital‐to‐analogue converter (DAC) components used in communication equipment. Using OEM technology, damaged DAC components, such as memory cells, current cells and current cell control switches, can be healed. The performance before and after healing is compared in this work. The simulation results prove the feasibility of using the proposed technology to heal the DAC almost to achieve the original performance.
Warm terrestrial planet with half the mass of Venus transiting a nearby star
Authors: Demangeon O. D. S. , Zapatero Osorio M. R. , Alibert Y. , Barros S. C. C. , Adibekyan V. , Tabernero H. M. , Antoniadis-Karnavas A. , Camacho J. D. , Suárez Mascareño A. , Oshagh M. , Micela G. , Sousa S. G. , Lovis C. , Pepe F. A. , Rebolo R. , Cristiani S. , Santos N. C. , Allart R. , Allende Prieto C. , Bossini D. , Bouchy F. , Cabral A. , Damasso M. , Di Marcantonio P. , D’Odorico V. , Ehrenreich D. , Faria J. , Figueira P. , Génova Santos R. , Haldemann J. , Hara N. , González Hernández J. I. , Lavie B. , Lillo-Box J. , Lo Curto G. , Martins C. J. A. P. , Mégevand D. , Mehner A. , Molaro P. , Nunes N. J. , Pallé E. , Pasquini L. , Poretti E. , Sozzetti A. , Udry S.
Published: August 2021

In recent years, the advent of a new generation of radial velocity instruments has allowed us to detect planets with increasingly lower mass and to break the one Earth-mass barrier. Here we report a new milestone in this context by announcing the detection of the lowest-mass planet measured so far using radial velocities: L 98-59 b, a rocky planet with half the mass of Venus. It is part of a system composed of three known transiting terrestrial planets (planets b–d). We announce the discovery of a fourth nontransiting planet with a minimum mass of 3.06−0.37+0.33 M⊕and an orbital period of 12.796−0.019+0.020days and report indications for the presence of a fifth nontransiting terrestrial planet. With a minimum mass of 2.46−0.82+0.66 M⊕and an orbital period 23.15−0.17+0.60days, this planet, if confirmed, would sit in the middle of the habitable zone of the L 98-59 system. L 98-59 is a bright M dwarf located 10.6ṗc away. Positioned at the border of the continuous viewing zone of theJames WebbSpace Telescope, this system is destined to become a corner stone for comparative exoplanetology of terrestrial planets. The three transiting planets have transmission spectrum metrics ranging from 49 to 255, which undoubtedly makes them prime targets for an atmospheric characterization with theJames WebbSpace Telescope, theHubbleSpace Telescope, Ariel, or ground-based facilities such as NIRPS or ESPRESSO. With an equilibrium temperature ranging from 416 to 627 K, they offer a unique opportunity to study the diversity of warm terrestrial planets without the unknowns associated with different host stars. L 98-59 b and c have densities of 3.6−1.5+1.4and 4.57−0.85+0.77g cm−3, respectively, and have very similar bulk compositions with a small iron core that represents only 12 to 14% of the total mass, and a small amount of water. However, with a density of 2.95−0.51+0.79g cm−3and despite a similar core mass fraction, up to 30% of the mass of L 98-59 d might be water.
Nutritional status differentially affect yield and must composition of hybrids andV. viniferavarieties established under cold climate conditions
Authors: Diez-Zamudio Francisco , Laytte Rodrigo , Grallert Cecilia , Gutiérrez-Gamboa Gastón
Published: August 2021

Nova Scotia is characterized by cold climate and acidic soils and high organic matter for viticultural development. There is little scientific information available about the nutritional management of grapevine varieties cultivated under cold climate conditions even in Nova Scotia. This study carried out in three seasons aimed to find correlations between tissue nutrients with yield and must composition in order to provide better nutritional management for a given variety. The yield of “L’Acadie” variety was correlated with B, K and Mg. In this variety, Ca to Mg ratio could be an interesting indicator of yield. The yield of “New York Muscat” variety was correlated with Zn, while N, P and K was related to bunch weight and weight of berries. Interspecific hybrids presented lower accumulation of B in their tissues than V. vinifera varieties. Zn and Fe were found as determinant micronutrients in “Chardonnay” variety. “Riesling” variety accumulated high levels of K in their tissues even over the optimal values recommended for grapevines. K to Ca ratio could be an important indicator of yield in “Pinot Noir” variety. A strong correlation between the petiole and blade analysis was found in macro and micro-nutrients. These results may contribute to improve the nutritional management of grapevines grown under cold climate conditions, mostly in Nova Scotia.
FEA Modelling of the Combined Hard TurningRolling Process Used at Bearing Rings
Authors: Dogan Gures , Mehmet Ilhan , Chitariu Dragoş Florin , Dumitraş Cătălin Gabriel , Crîşmaru Vasile Ionuţ
Published: August 2021

In general, the production of bearings is a very large series production, which is why in production the technological lines are designed to process a single size of bearings. Changing the production line for different types of bearings is expensive and time consuming, especially where grinding and honing processes are required. An alternative to these abrasive processes is hard turning. The literature indicates that due to highprecision machines, the accuracy of hard-turned parts is comparable to grinding processes. It is also indicated that the integrity of the surface and the topography of the surface together with the residual induced stresses are parameters of interest and that influence the performance of the bearings. So one method of increasing the durability of the bearings is to ensure a low roughness of the elements and high residual induced stresses. Deep rolling is considered as an alternative to honing and rectification processes. Rolling can induce higher surface stresses in the material compared to honing and grinding. The present paper proposes a combined cutting tool made of a hard turning head and a rolling cutting tool for machining bearing rings. A simulation of this combined process is performed with the help of the finite element and thus the internal stress field, the temperature fieldand the topography of the processed surface aredetermined.
Study regarding the influence of material type on economic objectives in MEX fabrication
Authors: Ulmeanu Mihaela-Elena , Doicin Cristian-Vasile , Roşca Liviu , Rennie Allan Ew , Abram Tom , Nuţă Andrei-Bogdan
Published: August 2021

Material Extrusion has been used extensively as an additive manufacturing technology for a variety of applications like visual models, functional prototypes, tooling components, patterns for castings, and final parts. The current research paper proposes a study on the material type influence on economic objectives in material extrusion fabrication of complex assemblies. Three economic objectives have been analysed, namely, estimated fabrication time, material usage and material cost, whilst two commercial additive manufacturing machines have been considered for the simulation. Cura and ZSuite slicing software were used for the generation of Gcode and project files. Five filaments were selected from the same manufacturer and all components of the selected assembly were included in the analysis. Throughout the study, the additive manufacturing parameters were kept constant, as well as the component layout on the build platform of the two machines. Study results were analysed in correspondence with the manufacturing requirements and the optimum fabrication scenario was selected. Further research includes the analysis of multiple material manufacturers, in order to evaluate the influence of chemical composition on economic outputs.
Research on the machining process modeling of a rotational mold using CAM applications
Authors: Ţîţu Aurel Mihail , Pop Alina Bianca
Published: August 2021

Rotational molding is a unique process, with a high growth rate, which allows the use of geometries and materials adapted to particular needs. It is superior to other manufacturing methods in terms of low cost, break-even point and size of parts that can be manufactured. Rotational molding products are often a substitute, with a lower mass, for traditionally used materials. In this scientific paper it is analyzed the recent literature related to the field of rotational molding processes. It also addresses the issue of processing a rotational mold, with the main purpose of optimizing the cutting regime. In this context, it is highlighted the way of processing the surface of the outer mold based on deductions of direct observation criteria. The factors considered in this regard are the route, the type and diameter of the tool, the speed and depth of cutting - given that the goal is to achieve a minimum quality of the required surface obtained by technology and a minimum base time. At the end of the paper, the contribution of this research is highlighted along with the arguments presented in support of the statement that this rotational molding process is of particular interest because it has a great potential to meet many surface quality requirements, while reducing cycle times.
CAD modelling of the human femur taking into account the structure of the bone
Authors: Brănescu Andrei Horia , Lebădă Ioana-Codruţa , Mihuţ Vlăduţ , Marjanovic Nenad , Rackov Milan
Published: August 2021

The use of 3D models of the human bone system has great utility in the biomechanical study, due to the fact that these structures cannot be analyzed or tested in vivo. Within this paper, taking into consideration its real bone structure, the human femur CAD modelling is established. Firstly, a preliminary anatomical study is done, in order to highlight the fact that the thigh bone is a heterogeneous structure, consisting of several entities with different mechanical characteristics. The modelling starts from a homogenous 3D model of the femur, from which, every single separate entity is designed and finally they are assembled within a single product assembly. Therefore, the final result ensures a complex CAD structure, able to get assigned different material properties, specific for each entity this modelling furtherly allows the characteristic pathological structures studies of the referred entity or to simulate specific surgical interventions.
Simulating traditional textile heritage motifs by applying CAD-CAM-CAE tool for furniture decoration
Authors: Lungu Antonela , Androne Antonius , Gurău Lidia , Coşereanu Camelia
Published: August 2021

As an interaction of multiple domains including design, the furniture industry may valorise in furniture ornamentation the traditional motifs, and could encourage the creativity of designers to develop original products with a modern design, based on the digitalized technology. The article presents an example of applying CAD-CAM-CAE tools for analysing the possibility of transposing traditional motifs from the textile heritage to the furniture decoration, and to select the appropriate CNC routing method and tool in order to obtain an ornament as close as possible to the original one. Traditional motifs (rose, tulip, bird, North Star) selected from the textile heritage of Ţara Bârsei - a historical and ethnographic region of Transylvania - were drawn in a digital format, using CorelDraw and AutoCAD programs, and then imported for a simulation of CNC routing process on wooden materials, using the software vCarvePro 9.519 developed by Vectric, with two types of tools and two processing methods, namely engraving (Engrave) and carving (VCarve). Following the simulation and the analysis of the obtained images, both visually and by ImageJ software, it was assessed which method is suitable for each ornament, considering also the processing times indicated by the simulation process of the models.
Quality Cost and Economic Analysis. A Synthesis in the Manufacturing Systems
Authors: Ocakci Elif , Niemann Jörg , Luminosu Caius , Artene Alin
Published: August 2021

The paper performs a literature review on existing models and methodologies to analyse and identify the cost of quality in manufacturing systems. The review shows that existing accounting models are insufficient to identify quality cost in detail in production processes. Existing models also do not cover the entire production activities and therefore need to be extended over the entire product life cycle. The authors therefore develop a new approach by refining and extending the method of activity-based costing to make it applicable for quality cost identification. The proposed methodology can serve as a building block for a later integration into superior supply chain management systems which allow to trigger continuous quality improvements of entire production networks.
Modern technologies used in health crisis management during the Covid-19 pandemic
Authors: Rotaru Nicu-Pantelimon , Taşcă Nicolae
Published: August 2021

During the last two years, the public health crisis caused by the SARS-CoV-2 pandemic has put constant pressure on social life, the functioning of institutions in general, and health services in particular. The rules of social distance or population mobility imposed by each state, determined by the level of spread of the virus, have shown how important various modern technologies are in facilitating relations between people or between them and state institutions or companies in which they work. Health services have directly benefited from the use of modern technology in health crisis management, but are also exposed to data security risks and the management of a large number of medical devices and consumables with limited use. In the context of the current crisis, the authors try to identify modern technologies and how they can facilitate the effective control of the spread of the pandemic, the exercise of a medical approach aimed at losing as few lives as possible, the discovery in record time of Covid-19 vaccines, the functioning of the economy and, very importantly, the maintenance of social relations in conditions of isolation. The authors’ approach methodology was based on the analysis and interpretation of information presented by prestigious websites in the field of healthcare, scientific research or Information Technology.
Fundamental elements regarding the approach of risk management within the international projects with teams in the virtual environment
Authors: Dumitraşcu-Băldău Iulia , Căpăţînă Alexandru , Dumitraşcu Dănuţ Dumitru
Published: August 2021

International projects with teams in the virtual environment (IPTVE) are known as complex and high risk projects, these features being considered as significant obstacles to project success. Applying the appropriate risk management methodology could increase their success rate, becoming a fundamental tool for decision making. Research on IPTVE management risks is scarce, focused on specific sectors as software development or construction, without taking into account the differences between traditional and international projects. Thereby, risk management within IPTVE becomes a necessary approach for the performance in managing international projects. This article aims to improve the risk management process within IPTVE, by proposing a flexible theoretical model of the process.
Preliminary criteria for the energy sector: environmental and economic efficiency of investment projects
Authors: Karaeva Anzhelika , Magaril Elena , Torretta Vincenzo , Rada Elena Cristina
Published: August 2021

Ecological and economic assessment is a key stage in the selection process of investment projects as it defines their efficiency and allows to forecast their likely impact on the environment and the socio-economic situation of the territory. Approaches to the efficiency assessment of investment projects include only basic criteria and do not sufficiently consider industryspecific. The energy sector is a significant primary sector in the global economy that directly affects the standard of living, energy resources availability for population and for the productive sector of economy and has a considerable impact on the environment. Therefore, the efficiency assessment process of investment project in the energy industry should comprise criteria which will respond to the branch specificity and provide accurate data about potential environmental and socio-economic consequences of project’s implementation in both the short and the long-term run. The paper aims to propose a list of environmental criteria for improving the process of the ecological and economic efficiency assessment of energy investment projects, considering also the Circular Economy concepts. The list is based on the results of the expert survey carried out by the authors and might be used for multiple-criteria decision analysis of the investment projects.
Managing a brand with a vision to marketing 5.0
Authors: Sima Elena
Published: August 2021

Marketing strives to add value to the company by aiming to attract customers, convincing them to develop a buying intention and eventually become consumers. The importance of marketing also lies in the famous quote from Steve Jobs: “Customers do not know what they want until we offer them.” Over time, marketing has gone through several stages and produced the step with the evolution of technological innovation that is essential for the future of any successful business. The rapid development of technology and the fact that it is now increasingly accessible in terms of learning and costs have led to its popularization among marketers and consumers. The complete paper proposes to present a foray into the evolution of marketing and to present a successful Romanian company and how it manages the brand in the 5.0 marketing vision. The paper aims to highlight how following the marketing trends a successful company manages to grow even in the adverse conditions of the pandemic. Various methods are used to carry out the works, such as SWOT analysis and questionnaire-based survey. The paper is richly illustrated by suggestive, interpreted graphics that underlie the conclusions drawn from the study.
Wireless communication based on Raspberry pi and Codesys for mobile robots using IoT technology
Authors: Maroşan Iosif-Adrian , Constantin George
Published: August 2021

The industrial environment is going through exponential changes, due to the diversity of technological solutions that appear more and more frequently and the increase of productivity at increasing capacities. Due to this fact in the industrial area the number of devices, processing systems, collaborative robots, mobile robots and industrial equipment is increasing more and more. Consequently, there is a need for communication and connectivity of entities, common physical or virtual functioning and decision making, all of which are fundamental to the transition to the new concept of Industry 4.0. This study presents how wireless communication can be achieved in a mobile robotic platform that serves an industrial sector with other equipment in the production area, such as industrial equipment, collaborative industrial robots or other mobile robots. Also in this paper is presented how to create an HMI interface for the mobile platform that can be accessed from a touchscreen display mounted on the robot or from any mobile device connected to the internet.
Possibilities of using automatic systems for correcting the position of working units of tools including soil cultivation
Authors: Zawada Michał , Legutko Stanisław , Szczepaniak Jan , Rogacki Roman , Wojciechowski Jacek , Szymczyk Sebastian
Published: August 2021

The progressive technical development of agriculture and the desire to increase the efficiency and quality of agrotechnical processes related to soil cultivation forces the use of more and more complex automation and robotisation processes in agricultural technology. The article introduces the reader to modern control systems for automatic hoeing tools and presents a modern control system for a baler-wrapper, the project of which (POIR.04.01.04-00-0067/18) is implemented by the authors in the Łukasiewicz Research Network Industrial Institute of Agricultural Engineering consortium with the Metal-Fach company. One of the reasons for the automatisation of agricultural machinery is the departure from chemical methods of cultivating crops, due to the growing awareness of consumers who want ecological and thus healthier products. The influence of automation on organic farming was characterized and its general principles were presented. The automatic cultivators were divided based on the kinematics of the tool movements they operate on the basis of machine vision. The results of the baler-wrapper tests were presented, confirming the validity of the designed control system. The authors summarized the main advantages and disadvantages of the systems for correcting the position of working tools of machines, considering the profitability of this type of investment on the example of weeder and a baler-wrapper. The article adopts the hypothesis that the development of agricultural automation has a positive effect on the development and popularity of organic farming.
Preventive maintenance features specific to offset printing machines
Authors: Bălan Emilia , Berculescu Liviu , Răcheru Răzvan-George , Piţigoi Dorin Vasile , Adăscăliţa Lucia
Published: August 2021

In the printing industry, where production never stops, it is very important to continuously maintain machine performance. If a machine breaks down, the production will stop and it will disturb the production process. Therefore, the maintenance system must be managed efficiently to solve those problems. The paper presents the study results on continuous quality improvement of offset printing using preventive maintenance features. Offset printing is a process that involves a multitude of variables, independent and interdependent factors. The offset printing process was analyzed and the factors that have a significant influence on the quality of the process and the products made were identified. The defects that may occur during the printing process and the causes thereof have also been identified and the types of non-conformities of the end products were estabilished. The experimental method was used. The case study was conducted on Manroland 508. For the planning of preventive maintenance activities, the duration of the maintenance works necessary to ensure the proper functioning of the offset printing machines was established. Finally, maintenance activities that would guarantee and continuously improve the quality of the printing processes and the printed products were issued.
Contributions to the development of search and rescue mobile robots
Authors: Gyarmati Marton , Tătar Mihai Olimpiu , Kadar Francisc
Published: August 2021

In this paper the authors present contributions to the development of search and rescue mobile robots. The first part of the paper describes the characteristics of search and rescue field. In the second part the authors presented the development and construction of an experimental prototype focusing on the locomotion systems for the search and rescue field and the results of the physical experiments done and the design and development of a proposed search and rescue mobile robot based on the lessons learned from the experiments. The third part contains the operation and control of the robot. The fourth section presents the simulation of the hybrid locomotion system of the proposed search and rescue mobile robot. The last part of the paper contains the development directions and conclusions.
Study of the possibilities to achieve an energy mix in areas affected by restructuring of lignite exploitation
Authors: Grecea Danut , Nan Marin Silviu , Aron Cristian , Vitan Cosmin , Tomus Bogdan
Published: August 2021

The general topic of this paper is to study the possibilities of using renewable energy sources to supply urban consumers electricity, consumers located in areas affected by industrial restructuring. This carries out a comprehensive study on the possibilities of using renewable energy sources in the Motru Basin area. Moreover, creation a mix capable of producing the electricity needed by the inhabitants, in household consumption and not only, is being studied. The entry of free energy market has brought about the alignment with competitive conditions and observance of pollution regulations in force, and energy production has determined retrofitting or restriction of the activity of some thermal power plants due to non-competitive costs for primary energy resources. Our country has a diversified and balanced energy mix (hydropower, nuclear energy, coal and natural gas) but it must be complemented by renewable sources (wind, solar, biomass) to provide stability and energy safety prospects.