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Automobile Component Manufacturers In Green Zone To Restart Operations Soon: Awaiting Approval

The Indian auto industry is slowly working its way to restart operations in India, after being shut down for over 40 days. Automobile companies are currently preparing to resume production in accordance with the government's guidelines for ensuring all safety and social distancing norms are followed.




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JK Tyre Resumes Operations Under Rules Set By The Government

Due to the COVID-19 pandemic, India is currently facing a nationwide lockdown and because of that, businesses across the nation have been affected badly. To resume business, the Government has come up with some guidelines which the companies have to follow strictly.




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Hero MotoCorp Restarts Operations Amidst Lockdown Relaxations: To Commence Production Phase-Wise

Hero MotoCorp, the world's largest two-wheeler manufacturer has announced it will soon be restarting operations in India. The decision to commence production comes as part of the relaxations put in place on the lockdown regulations by the central government.




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Royal Enfield To Restart Its Operations As Per Rules Set By The Government

Due to the COVID-19 pandemic, many businesses across the globe have been suspended or shut down. Due to the crisis, India is currently facing a nationwide lockdown till May 17. The automobile industry is going through a rough phase as plants




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Honda Two-Wheeler Dealerships Across India To Restart Operations: Safety Protocols In Place

Honda Motorcycles & Scooters India (HMSI) has announced that with the relaxation in lockdown regulations by the government, the company will be restarting dealer operations across India. The reopening of Honda dealerships across the country will begin in a phase-wise manner.




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Major U.S. airlines endorse temperature checks for passengers

A major U.S. airline trade group on Saturday said it backed the U.S. Transportation Security Administration (TSA) checking the temperatures of passengers and customer-facing employees during the coronavirus pandemic.




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Lecture on galvanic batteries and electrical machines, as used in torpedo operations: arranged in three parts / John P. Merrell

Archives, Room Use Only - QC573.M47 1874




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Description of the American electro magnetic telegraph: now in operation between the cities of Washington and Baltimore: illustrated by fourteen wood engravings / by Alfred Vail

Archives, Room Use Only - TK5123.V35 1845




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L'opera di Alessandro Volta: scelta di scritti originali / raccolti ed illustrati dal prof. Francesco Massardi ; pubblicati a cura della Associazione elettrotecnica italiana nel 1°. centenario della morte

Archives, Room Use Only - QC517.V92 1927




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Modern practice of the electric telegraph: a handbook for electricians and operators / by Frank L. Pope

Archives, Room Use Only - TK5263.P67 1881




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American telegraphy: systems, apparatus, operation / by William Maver, Jr

Archives, Room Use Only - TK5261.M58 1899




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The radio-telegraphist's guide and log-book: a manual of wireless telegraphy for the use of operators / by W.H. Marchant

Archives, Room Use Only - TK5743.M37 1912




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Wireless explained: the book for officers of the mercantile marine / by Frederick Cross, Lieut. R.N.R., headmaster and operator on the training ship "Mersey"

Archives, Room Use Only - VM480.5.G7 C76 1918




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Telephone construction, installation, wiring, operation and maintenance: a treatise describing and illustrating up-to-date methods of telephone practice, including the principles of construction and operation of telephone instruments ... / by W.H. Radclif

Archives, Room Use Only - TK6162.R33 1917




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Operation of trains and station work and telegraphy / compiled and edited by Frederick J. Prior

Archives, Room Use Only - TF550.P75 1919




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Sam Johnson: the experience and observations of a railroad telegraph operator / by Samson

Archives, Room Use Only - TK5265.C55 1878




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A handbook of the electric telegraph: designed for the use of students and operators / by I.W. Mattison

Archives, Room Use Only - TK5263.M38 1873




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Modern practice of the electric telegraph: a handbook for electricians and operators / by Frank L. Pope

Archives, Room Use Only - TK5263.P67 1873




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A testing laboratory in practical operation / by Clayton H. Sharp, Ph.D

Archives, Room Use Only - TK411.S53 1905




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Description of the American electro magnetic telegraph: now in operation between the cities of Washington and Baltimore: illustrated by fourteen wood engravings / by Alfred Vail

Archives, Room Use Only - TK5123.V35 1847




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The A.B.C. of wireless telegraphy: a plain treatise on Hertzian wave signaling, embracing theory, methods of operation, and how to build various pieces of the apparatus employed / by Edward Trevert [pseud.]

Archives, Room Use Only - TK5741.T74 1902




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Telegraphy and telephony with railroad applications / by Charles Stanley Rhoads ; a description of the fundamentals of telegraphy and telephony and of the organization, outside and inside plant, apparatus, circuits and methods of operation, engineering a

Archives, Room Use Only - TK5262.R46 1924




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Handbook for wireless telegraph operators working installations licensed by His Majesty's Postmaster-General: revised in accordance with the Radiotelegraph Convention of London, 1912.

Archives, Room Use Only - TK5743.G74 1915




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K'taka govt awaits consent of 6 states to operate trains for stranded people




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3,500 fly back in 3 days, PMO monitors Vande Bharat operations

Around 3,500 Indians stranded abroad had been flown into India until the wee hours on Sunday as India’s Vande Bharat Mission motored ahead under what official sources described as regular high-level oversight. While eight flights landed across India on Saturday — Day 3 — an equal number was expected on Sunday. Around 2K will be arriving from the Maldives.




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PHOTOS: IAF's Chinook begins operations in Siachen

The chopper was inducted into service in March last year.




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Andhra govt reduces liquor shops operating in state by further 13pc




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Gas leak fallout: CPCB asks industrial units across India to go for safety and hazard audit before resuming operations

Gas leak fallout: CPCB asks industrial units across India to go for safety and hazard audit before resuming operations




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Around 75% pharma units operational in Gujarat: FDCA

Around 75% pharma units operational in Gujarat: FDCA




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Vande Bharat operations: 3,500 fly back in 3 days

Vande Bharat operations: 3,500 fly back in 3 days




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Punjab Cabinet approves rules for facilitating Co-operative Societies




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Will cooperate with steps taken by PM, CM in this hour of shared challenge: SAD




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Punjab CM asks industrial units, brick kilns to commence operations with migrant workers




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COVID-19: Operations of food preparation establishments stopped in Ludhiana




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Military doctors in Punjab perform lifesaving operation




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Chandigarh Police's trapper for uncooperative corona patients




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Allow small industry to operate from non-containment zones: Punjab CM




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COVID-19: Punjab issues advisory for safe operation of govt offices




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Cochin Port Trust helps during ‘Operation Samudra Sethu’ for Maldives expatriates

This is the Indian Navy’s first massive evacuation exercise during the Covid-19 lockdown




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Mumbai: Several trapped after building collapses in Kandivali West; rescue operation underway

Further details are awaited.





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AP-XPS beamline, a platform for operando science at Pohang Accelerator Laboratory

Beamline 8A (BL 8A) is an undulator-based soft X-ray beamline at Pohang Accelerator Laboratory. This beamline is aimed at high-resolution ambient-pressure X-ray photoelectron spectroscopy (AP-XPS), soft X-ray absorption spectroscopy (soft-XAS) and scanning photoemission microscopy (SPEM) experiments. BL 8A has two branches, 8A1 SPEM and 8A2 AP-XPS, that share a plane undulator, the first mirror (M1) and the monochromator. The photon beam is switched between the two branches by changing the refocusing mirrors after the monochromator. The acceptance angle of M1 is kept glancing at 1.2°, and Pt is coated onto the mirrors to achieve high reflectance, which ensures a wide photon energy range (100–2000 eV) with high resolution at a photon flux of ∼1013 photons s−1. In this article, the main properties and performance of the beamline are reported, together with selected experiments performed on the new beamline and experimental system.




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A lathe system for micrometre-sized cylindrical sample preparation at room and cryogenic temperatures

A simple two-spindle based lathe system for the preparation of cylindrical samples intended for X-ray tomography is presented. The setup can operate at room temperature as well as under cryogenic conditions, allowing the preparation of samples down to 20 and 50 µm in diameter, respectively, within minutes. Case studies are presented involving the preparation of a brittle biomineral brachiopod shell and cryogenically fixed soft brain tissue, and their examination by means of ptychographic X-ray computed tomography reveals the preparation method to be mainly free from causing artefacts. Since this lathe system easily yields near-cylindrical samples ideal for tomography, a usage for a wide variety of otherwise challenging specimens is anticipated, in addition to potential use as a time- and cost-saving tool prior to focused ion-beam milling. Fast sample preparation becomes especially important in relation to shorter measurement times expected in next-generation synchrotron sources.




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1,4-Bis(2-nitro­benz­yl)piperazine

The title compound, C18H20N4O4, was synthesized via the base-assisted reaction of piperazine and 2-nitro­benyl bromide in toluene: the complete mol­ecule is generated by a crystallographic inversion centre in the solid state.




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Syntheses and structures of piperazin-1-ium ABr2 (A = Cs or Rb): hybrid solids containing `curtain wall' layers of face- and edge-sharing ABr6 trigonal prisms

The isostructural title compounds, poly[piperazin-1-ium [di-μ-bromido-caesium]], {(C4H11N2)[CsBr2]}n, and poly[piperazin-1-ium [di-μ-bromido-rubidium]], {(C4H11N2)[RbBr2]}n, contain singly-protonated piperazin-1-ium cations and unusual ABr6 (A = Cs or Rb) trigonal prisms. The prisms are linked into a distinctive `curtain wall' arrangement propagating in the (010) plane by face and edge sharing. In each case, a network of N—H⋯N, N—H⋯Br and N—H⋯(Br,Br) hydrogen bonds consolidates the structure.




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Six 1-aroyl-4-(4-meth­oxy­phen­yl)piperazines: similar mol­ecular structures but different patterns of supra­molecular assembly

Six new 1-aroyl-4-(4-meth­oxy­phen­yl)piperazines have been prepared, using coupling reactions between benzoic acids and N-(4-meth­oxy­phen­yl)piperazine. There are no significant hydrogen bonds in the structure of 1-benzoyl-4-(4-meth­oxy­phen­yl)piperazine, C18H20N2O2, (I). The mol­ecules of 1-(2-fluoro­benzo­yl)-4-(4-meth­oxy­phen­yl)piperazine, C18H19FN2O2, (II), are linked by two C—H⋯O hydrogen bonds to form chains of rings, which are linked into sheets by an aromatic π–π stacking inter­action. 1-(2-Chloro­benzo­yl)-4-(4-meth­oxy­phen­yl)piperazine, C18H19ClN2O2, (III), 1-(2-bromo­benzo­yl)-4-(4-meth­oxy­phen­yl)piperazine, C18H19BrN2O2, (IV), and 1-(2-iodo­benzo­yl)-4-(4-meth­oxyphen­yl)piperazine, C18H19IN2O2, (V), are isomorphous, but in (III) the aroyl ring is disordered over two sets of atomic sites having occupancies of 0.942 (2) and 0.058 (2). In each of (III)–(V), a combination of two C—H⋯π(arene) hydrogen bonds links the mol­ecules into sheets. A single O—H⋯O hydrogen bond links the mol­ecules of 1-(2-hy­droxy­benzo­yl)-4-(4-meth­oxy­phen­yl)piperazine, C18H20N2O3, (VI), into simple chains. Comparisons are made with the structures of some related compounds.




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Twelve 4-(4-meth­oxy­phen­yl)piperazin-1-ium salts containing organic anions: supra­molecular assembly in one, two and three dimensions

Twelve 4-(4-meth­oxy­phen­yl)piperazin-1-ium salts containing organic anions have been prepared and structurally characterized. The monohydrated benzoate, 4-fluoro­benzoate, 4-chloro­benzoate and 4-bromo­benzoate salts, C11H17N2O+·C7H5O2−·H2O (I), C11H17N2O+·C7H4FO2−·H2O (II), C11H17N2O+·C7H4ClO2−·H2O (III), and C11H17N2O+·C7H4BrO2−·H2O (IV), respectively, are isomorphous and all exhibit disorder in the 4-meth­oxy­phenyl unit: the components are linked by N—H⋯O and O—H⋯O hydrogen bond to form chains of rings. The unsolvated 2-hy­droxy­benzoate, pyridine-3-carboxyl­ate and 2-hy­droxy-3,5-di­nitro­benzoate salts, C11H17N2O+·C7H5O3− (V), C11H17N2O+·C6H4NO2− (VI) and C11H17N2O+·C7H3N2O7− (VII), respectively, are all fully ordered: the components of (V) are linked by multiple N—H⋯O hydrogen bonds to form a chain of rings; those of (VI) are linked into a three-dimensional framework by a combination of N—H⋯O, C—H⋯O and C—H⋯N hydrogen bonds and those of (VII), where the anion has a structure reminiscent of the picrate anion, are linked into a three-dimensional array by N—H⋯O and C—H⋯O hydrogen bonds. The hydrogensuccinate and hydrogenfumarate salts, C11H17N2O+·C4H5O4− (VIII) and C11H17N2O+·C4H3O3− (IX), respectively, are isomorphous, and both exhibit disorder in the anionic component: N—H⋯O and O—H⋯O hydrogen bonds link the ions into sheets, which are further linked by C—H⋯π(arene) inter­actions. The anion of the hydrogenmaleate salt, C11H17N2O+·C4H3O3− (X), contains a very short and nearly symmetrical O⋯H⋯O hydrogen bond, and N—H⋯O hydrogen bonds link the anions into chains of rings. The ions in the tri­chloro­acetate salt, C11H17N2O+·C2Cl3O2− (XI), are linked into simple chains by N—H⋯O hydrogen bonds. In the hydrated chloranilate salt, 2C11H17N2O+·C6Cl2O42−·2H2O (XII), which crystallizes as a non-merohedral twin, the anion lies across a centre of inversion in space group P21/n, and a combination of N—H⋯O and O—H⋯O hydrogen bonds generates complex sheets. Comparisons are made with the structures of some related compounds.




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Crystal structures of the recreational drug N-(4-meth­oxy­phen­yl)piperazine (MeOPP) and three of its salts

Crystal structures are reported for N-(4-meth­oxy­phen­yl)piperazine (MeOPP), (I), and for its 3,5-di­nitro­benzoate, 2,4,6-tri­nitro­phenolate (picrate) and 4-amino­benzoate salts, (II)–(IV), the last of which crystallizes as a monohydrate. In MeOPP, C11H16N2O, (I), the 4-meth­oxy­phenyl group is nearly planar and it occupies an equatorial site on the piperazine ring: the mol­ecules are linked into simple C(10) chains by N—H⋯O hydrogen bonds. In each of the salts, i.e., C11H17N2O+·C7H3N2O6−, (II), C11H17N2O+·C6H2N3O7−, (III), and C11H17N2O+·C7H6NO2−·H2O, (IV), the effectively planar 4-meth­oxy­phenyl substituent again occupies an equatorial site on the piperazine ring. In (II), two of the nitro groups are disordered over two sets of atomic sites and the bond distances in the anion indicate considerable delocalization of the negative charge over the C atoms of the ring. The ions in (II) are linked by two N—H⋯O hydrogen bonds to form a cyclic, centrosymmetric four-ion aggregate; those in (III) are linked by a combination of N—H⋯O and C—H⋯π(arene) hydrogen bonds to form sheets; and the components of (IV) are linked by N—H⋯O, O—H⋯O and C—H⋯π(arene) hydrogen bonds to form a three-dimensional framework structure. Comparisons are made with the structures of some related compounds.




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Optimization of crystallization of biological macromolecules using dialysis combined with temperature control

A rational way to find the appropriate conditions to grow crystal samples for bio-crystallography is to determine the crystallization phase diagram, which allows precise control of the parameters affecting the crystal growth process. First, the nucleation is induced at supersaturated conditions close to the solubility boundary between the nucleation and metastable regions. Then, crystal growth is further achieved in the metastable zone – which is the optimal location for slow and ordered crystal expansion – by modulation of specific physical parameters. Recently, a prototype of an integrated apparatus for the rational optimization of crystal growth by mapping and manipulating temperature–precipitant–concentration phase diagrams has been constructed. Here, it is demonstrated that a thorough knowledge of the phase diagram is vital in any crystallization experiment. The relevance of the selection of the starting position and the kinetic pathway undertaken in controlling most of the final properties of the synthesized crystals is shown. The rational crystallization optimization strategies developed and presented here allow tailoring of crystal size and diffraction quality, significantly reducing the time, effort and amount of expensive protein material required for structure determination.




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A thermal-gradient approach to variable-temperature measurements resolved in space

Temperature is a ubiquitous environmental variable used to explore materials structure, properties and reactivity. This article reports a new paradigm for variable-temperature measurements that varies the temperature continuously across a sample such that temperature is measured as a function of sample position and not time. The gradient approach offers advantages over conventional variable-temperature studies, in which temperature is scanned during a series measurement, in that it improves the efficiency with which a series of temperatures can be probed and it allows the sample evolution at multiple temperatures to be measured in parallel to resolve kinetic and thermodynamic effects. Applied to treat samples at a continuum of temperatures prior to measurements at ambient temperature, the gradient approach enables parametric studies of recovered systems, eliminating temperature-dependent structural and chemical variations to simplify interpretation of the data. The implementation of spatially resolved variable-temperature measurements presented here is based on a gradient-heater design that uses a 3D-printed ceramic template to guide the variable pitch of the wire in a resistively heated wire-wound heater element. The configuration of the gradient heater was refined on the basis of thermal modelling. Applications of the gradient heater to quantify thermal-expansion behaviour, to map metastable polymorphs recovered to ambient temperature, and to monitor the time- and temperature-dependent phase evolution in a complex solid-state reaction are demonstrated.