scholarly journals A PROPOSED SIMPLIFIED TECHNIQUE FOR CONFIRMING HIGH PRECISION GNSS ANTENNA OFFSETS

Aviation ◽  
2010 ◽  
Vol 14 (3) ◽  
pp. 83-89
Author(s):  
Vilma Zubinaitė ◽  
George Preiss
Keyword(s):  
High Precision ◽  
Reasonable Agreement ◽  
The Other ◽  
Three Dimensions ◽  
Great Effort ◽  
Antenna Phase ◽  
Simplified Procedure ◽  
Antenna Phase Centre ◽  
Gnss Observations ◽  
Calibration Parameters

The purpose of this research was to independently investigate and determine confirmatory calibration procedures for GNSS antennas. This paper focuses on the aspect of simplified techniques for confirming high precision GNSS antenna offsets. In the other words, the aim is to verify GNSS antenna offset parameters ‐ results, which will be used to find the consequences on ground positions of orbital distortions caused by solar activity. It is well known that the computation of GNSS observations using high precision GNSS antennas requires knowledge of the relevant antenna phase centre offsets. These offsets are the distance in three dimensions from the antenna's physical centre to the point in space at which the antenna ‘measures’ position. The calibration processes used by manufacturers appear to vary, and, where receivers of different models are to be used together, it is essential that the calibration parameters used are all produced using the same methods and by the same authoritative sources. Meanwhile, with the growth in the use of high precision GNSS systems, the likelihood of antennas being accidentally mishandled is possibly higher than previously. Finally, it is noted that it has long been the practise for surveyors to check their instruments to ensure that they are properly calibrated. In the modern electronic age, however, it seems that this practise has been allowed to lapse as far as GNSS instrumentation is concerned. With the above in mind, it has been decided to attempt to create a simplified procedure for calibrating high precision GNSS antennas. The aim is that it will be possible for the average surveyor to check his antenna without great effort or trouble. The objective can also be described as finding a simplified field procedure to determine whether a specific antenna's offset parameters are within reasonable agreement with published figures. Santrauka Straipsnyje analizuojamas supaprastintas metodas, kuriuo galima aprobuoti aukšto tikslumo globalines navigacines palydovines sistemos (GNPS) antenos nukrypimus. Siekiama patinkrinti GNPS antenos nukrypimo parametrus ‐ rezultatus, kurie bus naudojami nustatant GNPS palydovo orbitos iškraipymu padarinius. Nagrinejama procedūra, kai siekiama nustatyti, ar konkrečios GNPS antenos kalibravimo parametrai yra pagristi, palyginti su publikuotais duomenimis. Analizuojama problema yra aktuali, kai GNPS matavimams naudojamos aukšto tikslumo GNPS antenos ir reikalingos žinios, susijusios su antenos fazes centro nukrypimais.

scholarly journals BATCH PROCESSING OF TREE-RING SAMPLES FOR RADIOCARBON ANALYSIS

Radiocarbon ◽  
2020 ◽  
pp. 1-13
Author(s):  
Alexandra Fogtmann-Schulz ◽  
Sabrina G K Kudsk ◽  
Florian Adolphi ◽  
Christoffer Karoff ◽  
Mads F Knudsen ◽  
...  
Keyword(s):  
High Precision ◽  
Tree Rings ◽  
Precision Measurement ◽  
Radiocarbon Dating ◽  
The Other ◽  
High Precision Measurement ◽  
Machine Performance ◽  
High Throughput Method ◽  
Ca 50 ◽  
Low Activity

ABSTRACT We here present a comparison of methods for the pretreatment of a batch of tree rings for high-precision measurement of radiocarbon at the Aarhus AMS Centre (AARAMS), Aarhus University, Denmark. The aim was to develop an efficient and high-throughput method able to pretreat ca. 50 samples at a time. We tested two methods for extracting α-cellulose from wood to find the most optimal for our use. One method used acetic acid, the other used HCl acid for the delignification. The testing was conducted on background 14C samples, in order to assess the effect of the different pretreatment methods on low-activity samples. Furthermore, the extracted wood and cellulose fractions were analyzed using Fourier transform infrared (FTIR) spectroscopy, which showed a successful extraction of α-cellulose from the samples. Cellulose samples were pretreated at AARAMS, and the graphitization and radiocarbon analysis of these samples were done at both AARAMS and the radiocarbon dating laboratory at Lund University to compare the graphitization and AMS machine performance. No significant offset was found between the two sets of measurements. Based on these tests, the pretreatment of tree rings for high-precision radiocarbon analysis at AARAMS will henceforth use HCI for the delignification.

scholarly journals Spontaneous deformation of protocatechuic acid crystals

1949 ◽  
Vol 197 (1050) ◽  
pp. 283-294 ◽  
Keyword(s):  
Protocatechuic Acid ◽  
Motion Pictures ◽  
Extensive Study ◽  
The Other ◽  
Three Dimensions ◽  
Stable Configuration ◽  
Unique Case ◽  
The Past ◽  
Spontaneous Deformation ◽  
Lattice Planes

In this paper an extensive study is reported of the very remarkable, and thus far apparently unique, case of the deformation in three dimensions of protocatechuic acid, to which attention was drawn many years ago by Otto Lehmann. The deformations are spontaneous, and are probably due to progressive gliding of the lattice planes, which exist in two configurations, one stable and the other unstable, the latter being the condition of the long prismatic rods when they first form. Such a prism presently deforms into a zigzag crystal, with stable and unstable sections in alternation which, with continuation of the deformation, becomes again straight, but now in the stable configuration. The bending is progressive, like that of an umbrella case, pendant from the end of an oblique cane pointed down, when the latter is pushed into it. The movements are so rapid that motion pictures, made with a microscope, were necessary for the observation of certain stages of the deformation. The deformations have been shown to many chemists and physicists during the past decade or more, none of whom had ever seen or heard of this remarkable type of crystal movement. The deformations are usually observed as the warm saturated solution cools, but they also occur after the crystal has been dried for many hours.

High-precision abundances of elements in stars with asteroseismic ages

2017 ◽  
Vol 13 (S334) ◽  
pp. 166-169
Author(s):  
P. E. Nissen ◽  
V. Silva Aguirre ◽  
J. Christensen-Dalsgaard ◽  
R. Collet ◽  
F. Grundahl ◽  
...  
Keyword(s):  
High Precision ◽  
Main Sequence ◽  
Potential Problem ◽  
Galactic Evolution ◽  
The Other ◽  
Main Sequence Stars ◽  
Refractory Elements ◽  
Other Hand ◽  
New Information ◽  
Oscillation Frequencies

AbstractHigh-precision abundances of elements have been derived from HARPS-N spectra of F and G main-sequence stars having ages determined from oscillation frequencies delivered by the Kepler mission. The tight relations between abundance ratios of refractory elements, e.g., [Mg/Fe] and [Y/Mg], and stellar age previously found for solar twin stars are confirmed. These relations provide new information on nucleosynthesis and Galactic evolution. Abundance ratios between volatile and refractory elements, e.g., [C/Fe] and [O/Fe], show on the other hand a significant scatter at a given age, which may be related to planet-star interactions. This is a potential problem for chemical tagging studies.

scholarly journals DESIGN OF THE USABILITY MEASUREMENT TOOL FOR MULTIMODAL MOBILE APPLICATIONS

2015 ◽  
Vol 77 (29) ◽  
Author(s):  
Ahmed Sheikh Abdullah Al-Aidaroos ◽  
Ariffin Abdul Mutalib
Keyword(s):  
User Interface ◽  
Mobile Phones ◽  
Mobile Applications ◽  
Daily Life ◽  
The Other ◽  
Three Dimensions ◽  
Measurement Tool ◽  
Evaluation Instrument ◽  
Voice Call ◽  
Goal Question Metric

Nowadays, mobile phones provide not just voice call and messaging services, but plethora of other services. Those computational capabilities allow mobile phones to serve people in various areas including education, banking, commerce, travelling, and other daily life aspects. Meanwhile, the number of mobile phone users has increased dramatically in the last decade. On the other hand, the usability of an application can usually be verified through the user interface. Therefore, this paper aims to design a measurement tool to evaluate the usability of mobile applications based on the usability attributes and dimensions that must be considered in the interface. To obtain the appropriate attributes, a Systematic Literature Review (SLR) has been conducted and the Goal Question Metric (GQM) has been used to design the tool. From 261 related works only 18 most relevant ones were selected, through four SLR. 25 dimensions were found through the SLR, but some of these dimensions are synonymous or a part of other dimensions. Consequently, three dimensions must be included in any usability evaluation instrument, which is broken down into ten sub dimensions.

scholarly journals Exploring the behavioral drivers of review valence

2018 ◽  
Vol 30 (10) ◽  
pp. 3083-3099 ◽  
Author(s):  
Panagiotis Stamolampros ◽  
Nikolaos Korfiatis
Keyword(s):  
Information Content ◽  
Service Providers ◽  
Online Reviews ◽  
The Other ◽  
Three Dimensions ◽  
Spatial Distance ◽  
Bag Of Words ◽  
Content Type ◽  
Online Ratings ◽  
Positive Direct

Purpose Although the literature has established the effect of online reviews on customer purchase intentions, the influence of psychological factors on online ratings is overlooked. This paper aims to examine these factors under the perspective of construal level theory (CLT). Design/methodology/approach Using review data from TripAdvisor and Booking.com, the authors study three dimensions of psychological distances (temporal, spatial and social) and their direct and interaction effects on review valence, using regression analysis. The authors examine the effect of these distances on the information content of online reviews using a novel bag-of-words model to assess its concreteness. Findings Temporal distance and spatial distance have positive direct effects on review valence. Social distance, on the other hand, has a negative direct effect. However, its interaction with the other two distances has a positive effect, suggesting that consumers tend to “zoom-out” to less concrete things in their ratings. Practical implications The findings provide implications for the interpretation of review ratings by the service providers and their information content. Originality/value This study extends the CLT and electronic word-of-mouth literature by jointly exploring the effect of all three psychological distances that are applicable in post-purchase evaluations. Methodologically, it provides a novel application of the bag-of-words model in evaluating the concreteness of online reviews.

scholarly journals Management of accounting information resources security in Polish entities – study results

2018 ◽  
Vol 2018 (97 (153)) ◽  
pp. 115-139
Author(s):  
Elżbieta Szczepankiewicz
Keyword(s):  
Empirical Research ◽  
Accounting Information ◽  
Information Resources ◽  
The Other ◽  
Three Dimensions ◽  
Accounting System ◽  
External Threats ◽  
Study Results ◽  
Cyber Space ◽  
Business Entities

The presence of contemporary entities in the cyber-space shows that IT offers unlimited possibilities of running a business and developing an organisation. On the other hand, it involves a greater number of internal and external threats in the area of accounting information resources security. The objective of the paper is to diagnose the current level of accounting information resources security (AIRS) assurance in Polish business entities. The paper analyses two research hypotheses. In accordance with the first one, the AIRS assurance level in various entity groups may be different, even though all entities should have implemented the same requirements of the Accounting Act in the analyzed area. The identified differences may result from the effect of additional, industry-specific regulations. The other hypothesis claims that in the private business area, accounting and auditing companies adhere to AIRS regulations more strictly than other small and medium enterprises. The paper defines the fundamental factors affecting the functioning of corporate accounting systems in the three dimensions of the cyber-space. Subsequently, the author presents the results of empirical research on how corporate information security is ensured in the context of internal accounting control systems and the requirements of the Polish Accounting Act. The results of the empirical research show how the management of the analysed entities crafts the basic elements of their internal environment as well as internal communication and control processes connected with ensuring information resources security. The results also show the management’s approach to various aspects of risk management of accounting information resources security, as well as to adherence to organisational and administrative procedures, and to hardware and software safeguards in the IT environment of the accounting system. The issues analysed in the present paper open a scholarly discussion that should lead to the development of theoretical models, recommendation of efficient methods and tools, as well as indication of adequate legislative initiatives. Research methods used by the author include analysis of literature and legislation, analysis of survey results, deduction and inference.

scholarly journals Optimization of justice: administrative offense cases in Russia

2021 ◽  
pp. 145-154
Author(s):  
O. V. Pankova
Keyword(s):  
Legal Regulation ◽  
Judicial System ◽  
The Other ◽  
Social Significance ◽  
The Social ◽  
Administrative Punishment ◽  
The Russian Federation ◽  
Simplified Procedure ◽  
Special Rights ◽  
Administrative Penalty

The article is devoted to the study of the problems of legal regulation of jurisdiction and jurisdiction of cases of administrative offenses in the light of the forthcoming reform of administrative tort legislation. The author shows how the issues of optimizing jurisdiction and jurisdiction in such cases are related to solving the problem of ineffectiveness in the administration of justice in the sphere of administrative-tort relations and restoring the systemic character of legislative regulation of administrative responsibility, establishing clear criteria for the distribution of cases of administrative offenses between judicial and non-judicial bodies, with one hand, and within individual links of the judicial system — on the other. Particular attention is paid to substantiating the need to establish a predominantly out-of-court procedure for considering cases of administrative offenses. At the same time, it is emphasized that the optimization of the administrative and jurisdictional activities of the courts should be associated with such factors as the social significance and direction of the unlawful act, as well as the severity of administrative punishment. In this regard, the appointment of administrative punishments in the form of a warning, deprivation of special rights and administrative expulsion in the form of an independent departure from the Russian Federation is proposed to be attributed to the exclusive competence of the executive authorities.With regard to an administrative fine, the author concludes that only in cases where the size of the fine is comparable to a more severe administrative penalty or the amount of increased fines established for crimes in similar areas of activity, its imposition should be attributed to the exclusive competence of the court.In certain cases, it is also proposed to introduce a simplified procedure for considering cases in the courts on the imposition of an administrative fine.

scholarly journals Antecedents of organizational commitment of insurance agents: Job satisfaction, ethical behavior, and ethical climate

2020 ◽  
Vol 5 (2) ◽  
pp. 134-149
Author(s):  
Weihui Fu ◽  
Feng He ◽  
Na Zhang
Keyword(s):  
Job Satisfaction ◽  
Organizational Commitment ◽  
Ethical Behavior ◽  
Ethical Climate ◽  
Positive Impact ◽  
The Other ◽  
Three Dimensions ◽  
Insurance Agents ◽  
Ethical Climates ◽  
The Impact

This research explored the impact of job satisfaction, the ethical behavior of coworkers, successful managers, and employees themselves. Also explored were six types of ethical climate on organizational commitment and its three dimensions, including affective, continuance, and normative commitment through an investigation on 476 Chinese insurance agents. The empirical results showed that ethical behavior of coworkers and a caring climate had a significantly positive impact on both organizational commitment and its three dimensions, while independence climate had no significant influence on overall organizational commitment or its three dimensions. Job satisfaction, ethical behavior of successful managers and employees themselves, and the other five types of ethical climates only had a significant impact on organizational commitment or some of its dimensions.

scholarly journals Do Frugal and Reverse Innovation Foster Sustainability? Introduction of a Conceptual Framework

2013 ◽  
Vol 4 (2) ◽  
pp. 31-50 ◽  
Author(s):  
Alexander Brem ◽  
Björn Ivens
Keyword(s):  
Conceptual Framework ◽  
Value Creation ◽  
The Other ◽  
Three Dimensions ◽  
Reverse Innovation ◽  
Sustainability Management ◽  
Sustainability Performance ◽  
And Performance ◽  
The One ◽  
The Relationship

The fields of frugal and reverse innovation as well as sustainability and its management have received tremendous interest in recent times. However, there is little literature on how both fields are related to each other. Hence, this paper gives an overview of research in both areas and provides a view of the relationship between frugal and reverse innovation, sustainability management and performance constructs. The link between frugal and reverse innovation on the one hand and sustainability performance on the other hand is established through a differentiated perspective on dimensions representing different fields of sustainability management, i.e. the sustainability of resources used in value creation, the sustainability of the actual value creation processes, and the sustainability of the outcomes of value creation processes. Moreover, we also argue for a positive link between the three dimensions of sustainability management and a company’s market performance.

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