Crystal structures of N ′-Aminopyridine-2-carboximidamide and N ′-{[1-(pyridin-2-yl)ethylidene]amino}pyridine-2-carboximidamide

© Eya'ane Meva et al. 2017. The crystal structures of N,-Aminopyridine-2-carboximidamide (C 6 H 8 N 4 ), 1, and N,-{[1-(pyridin-2-yl)ethylidene]amino}pyridine-2-carboximidamide (C 13 H 13 N 5 ), 2, are described. The non-H atoms in compound 1 are nearly planar (r.m.s. deviation from planarity = 0.0108 Å ), while 2 is twisted about the central N-N bond by 17.8 (2)-. Both molecules are linked by intermolecular N-H·N hydrogen-bonding interactions; 1 forms a two-dimensional hydrogen-bonding network and for 2 the network is a one-dimensional chain. The bond lengths of these molecules are similar to those in other literature reports of azine and diimine systems

An Address on "Pride"

Prepared for the Centennial of The Ohio State University

LEICESTERSHIRE (Reino Unido) (Inglaterra). Mapas generales. 1787 (1775-1777). 1:134000

Escala gráfica de 6 millas [= 7,2 cm]. Coordenadas referidas a un meridiano que no se especifica (O 0°07'05''--O 0°02'25''/N 52°58'30''--N 52°22'00''). Recuadro geográfico de 5' en 5'. Orientado con lis en rosa de ocho vientosDestaca especialmente la división intermunicipal y señala los límites con los condados adyacenteTabla de signos convencionales para indicar las principales ciudades, pueblos, aldeas y granjas del condad

A low-cost vision-based unmanned aerial system for extremely low-light GPS-denied navigation and thermal imaging

This paper presents the design and implementation details of a complete unmanned aerial system (UAS) based on commercial-off-the-shelf (COTS) components, focusing on safety, security, search and rescue scenarios in GPS-denied environments. In particular, The aerial platform is capable of semi-autonomously navigating through extremely low-light, GPS-denied indoor environments based on onboard sensors only, including a downward-facing optical flow camera. Besides, an additional low-cost payload camera system is developed to stream both infra-red video and visible light video to a ground station in real-time, for the purpose of detecting sign of life and hidden humans. The total cost of the complete system is estimated to be $1150, and the effectiveness of the system has been tested and validated in practical scenarios

Charging a quantum battery with linear feedback control

Energy storage is a basic physical process with many applications. When considering this task at the quantum scale, it becomes important to optimise the non-equilibrium dynamics of energy transfer to the storage device or battery. Here, we tackle this problem using the methods of quantum feedback control. Specifically, we study the deposition of energy into a quantum battery via an auxiliary charger. The latter is a driven-dissipative two-level system subjected to a homodyne measurement whose output signal is fed back linearly into the driving field amplitude. We explore two different control strategies, aiming to stabilise either populations or quantum coherences in the state of the charger. In both cases, linear feedback is shown to counteract the randomising influence of environmental noise and allow for stable and effective battery charging. We analyse the effect of realistic control imprecisions, demonstrating that this good performance survives inefficient measurements and small feedback delays. Our results highlight the potential of continuous feedback for the control of energetic quantities in the quantum regime.Comment: v1: 10 pages, 8 figures. Comments welcome! v2: Final versio

Crystal structures and Hirshfeld surface analysis of transition-metal complexes of 1,3-azolecarboxylic acids

The crystal structures of five new transition-metal complexes synthesized using thia­zole-2-carb­oxy­lic acid (2-Htza), imidazole-2-carb­oxy­lic acid (2-H2ima) or 1,3-oxazole-4-carb­oxy­lic acid (4-Hoxa), namely di­aqua­bis­(thia­zole-2-carboxyl­ato-κ2N,O)cobalt(II), [Co(C4H2NO2S)2(H2O)2], 1, di­aqua­bis­(thia­zole-2-car­box­yl­ato-κ2N,O)nickel(II), [Ni(C4H2NO2S)2(H2O)2], 2, di­aqua­bis­(thia­zole-2-car­boxyl­ato-κ2N,O)cadmium(II), [Cd(C4H2NO2S)2(H2O)2], 3, di­aqua­bis­(1H-imidazole-2-carboxyl­ato-κ2N3,O)cobalt(II), [Co(C4H2N2O2)2(H2O)2], 4, and di­aqua­bis­(1,3-oxazole-4-carboxyl­ato-κ2N,O4)cobalt(II), [Co(C4H2NO3)2(H2O)2], 5, are reported. The influence of the nature of the heteroatom and the position of the carboxyl group in relation to the heteroatom on the self-assembly process are discussed based upon Hirshfeld surface analysis and used to explain the observed differences in the single-crystal structures and the supra­molecular frameworks and topologies of complexes 1–5

Farm Management - Bugger the roots, where is the future?

The Farm Management discipline has long been closely aligned with agricultural economics. The question we raise is not where either discipline came from but where is Farm Management going. The impact of globalisation, the rising tide of deregulation and chain reversal mean that farm management professionals who have traditionally focused on optimisation of activities at a farm level are now commonly expected to use sociology and management science to explain economic organisation and performance on farms. They also are required to look at relationships in the value chain(s) in which the farm sits. This paper will analyse the implications of such change for Farm Management professionals.Farm Management, value chains, Farm Management,

A review and evaluation of secondary school accountability in England:Statistical strengths, weaknesses, and challenges for 'Progress 8'

School performance measures are published annually in England to hold schools to account and to support parental school choice. This article reviews and evaluates the Progress 8 secondary school accountability system for state-funded schools. We assess the statistical strengths and weaknesses of Progress 8 relating to: choice of pupil outcome attainment measures; potential adjustments for pupil input attainment and background characteristics; decisions around which schools and pupils are excluded from the measure; presentation of Progress 8 to users, choice of statistical model, and calculation of statistical uncertainty; and issues related to the volatility of school performance over time, including scope for reporting multi-year averages. We then discuss challenges for Progress 8 raised by the COVID-19 pandemic. Six simple recommendations follow to improve Progress 8 and school accountability in England.Comment: 67 pages, 8 figure

Implementing Information System Innovations to Manage Biosecurity Issues in Australian Food NetChains

Tracking and tracing systems are being demanded by customers such as the major Australian supermarket chains, superior food service chains and globally in export markets such as the European Union and Asia. This includes the ability to track products as they move to downstream customers and to traceback where products have been sourced for feedback and to resolve problems. To continue to access these global premium priced markets Australian food organisations need to ensure they meet changing customer requirements. Traditionally information communication technologies to provide tracking and tracing systems have been set up for larger business and industry sectors that warrant the costs of development. Small business cannot always afford to invest in the infrastructure to establish through chain and industry wide netchain based systems. This problem is compounded where businesses are fragmented and spread over large geoographical areas even if they have similar requirements. An action learning approach was taken to identify what is needed in setting up tracking and tracing systems to address biosecurity issues in three small business based netchains (livestock 'A' and fruits 'B' and 'C'). In the livestock 'A' sector fears of a global pandemic has heightened the need for tracking and traceablity processes, combined with preventative actions and rigorous bio-security protocols (e.g. traceability of traffic properties). For fruit 'B' and 'C' movements of produce across state and national borders requires phytosanitary certification to provide assurance to minimize or eradicate the spread of diseases and pests. Concerns or delays in tracking and tracing can result in perishable produce becoming unsalable. A system was identified to suit small businesses and those in niche market industries. The system was based on deployment through the internet. The system had to link in with existing business information systems and business methods, be reliable, able to be tailored to address biosecurity issues and effective in meeting customer requirements. Results presented compare the use of the tracking and tracing system across the three different sectors (animal and horticultural products) and states of Australia. Findings are presented on what was learnt in the process including: identifying business in chains and networks to work collaboratively with; catalysts needed to get commitment to change; and support systems needed for successful implementation across multiple small businesses linked in netchains