Rotational Characteristics of the Green Solar Corona: 1947-1991

1994 ◽  
Vol 144 ◽  
pp. 139-141 ◽  
Author(s):  
J. Rybák ◽  
V. Rušin ◽  
M. Rybanský
Keyword(s):  
Solar Corona ◽  
World Wide ◽  
Rotation Period ◽  
Original Data ◽  
Coronal Emission ◽  
Time Intervals ◽  
Data Set ◽  
The World ◽  
Coronal Emission Line ◽  
Homogeneous Data

AbstractFe XIV 530.3 nm coronal emission line observations have been used for the estimation of the green solar corona rotation. A homogeneous data set, created from measurements of the world-wide coronagraphic network, has been examined with a help of correlation analysis to reveal the averaged synodic rotation period as a function of latitude and time over the epoch from 1947 to 1991.The values of the synodic rotation period obtained for this epoch for the whole range of latitudes and a latitude band ±30° are 27.52±0.12 days and 26.95±0.21 days, resp. A differential rotation of green solar corona, with local period maxima around ±60° and minimum of the rotation period at the equator, was confirmed. No clear cyclic variation of the rotation has been found for examinated epoch but some monotonic trends for some time intervals are presented.A detailed investigation of the original data and their correlation functions has shown that an existence of sufficiently reliable tracers is not evident for the whole set of examinated data. This should be taken into account in future more precise estimations of the green corona rotation period.

scholarly journals The Core of the Global Corporate Network

2021 ◽  
Author(s):  
Ricardo Giglio ◽  
Thomas Lux
Keyword(s):  
Network Topology ◽  
World Wide ◽  
Data Set ◽  
The Core ◽  
Comprehensive Data ◽  
The World ◽  
Corporate Network ◽  
Board Membership ◽  
National Networks ◽  
Wide Population

AbstractWe investigate the network topology of a comprehensive data set of the world-wide population of corporate entities. In particular, we have extracted information on the boards of all companies listed in Bloomberg’s archive of company profiles in October, 2015, a total of almost 100,000 firms. We provide information on board membership overlaps at various levels, and, in particular, show that there exists a core of directors who accumulate a large number of seats and are highly connected among themselves both at the level of national networks and at the worldwide aggregated level.

Beyond the Fiction of Federalism: Macroeconomic Management in Multitiered Systems

2002 ◽  
Vol 54 (4) ◽  
pp. 494-531 ◽  
Author(s):  
Jonathan Rodden ◽  
Erik Wibbels
Keyword(s):  
Empirical Research ◽  
Fiscal Decentralization ◽  
Original Data ◽  
The Political ◽  
Budget Balance ◽  
Data Set ◽  
Federal States ◽  
The World ◽  
Macroeconomic Management ◽  
Economic Experiences

Recent research on federalism is extremely divided. While some tout the benefits of “market-preserving” federalism, others point to the fragmentation and incoherence of policy in federal states. This research bridges the divide by analyzing the political andfiscalstructures that are likely to account for the highly divergent economic experiences of federal systems around die world. To test these propositions, the authors use an original data set to conduct analyses of budget balance and inflation infifteenfederationsaround the world from 1978 through 1996. The empirical research suggests that the level of fiscal decentralization, the nature of intergovernmental finance, and vertical partisan relations all influence macroeconomic outcomes. The find- ings have broad implications for the widespread move toward greater decentralization and for the theoretical literatures on federalism and macroeconomics.

Diameter Prediction for Correcting Continuous Forest Inventory Data

1991 ◽  
Vol 8 (2) ◽  
pp. 76-82
Author(s):  
Douglas Eberhardt ◽  
Edwin J. Green
Keyword(s):  
Basal Area ◽  
Original Data ◽  
Ordinary Least Squares ◽  
Inventory Data ◽  
Time Intervals ◽  
Data Set ◽  
Advantages And Disadvantages ◽  
Continuous Forest ◽  
Time Period ◽  
Regular Time

Abstract Permanent plot data are used in many studies. Trees are measured for diameter, height, and other characteristics at regular time intervals. Occasionally, errors in the diameter measurements result in a larger diameter reported at the time of the first measurement rather than the second, thus making some of the data apparently unusable. Currently there are at least two basic methods in use to compensate and estimate the growth on trees exhibiting illogical consecutive diameters. This study examines these two techniques in addition to a few others, and evaluates the advantages and disadvantages of each method. A 5% random sample was drawn from a data set void of obviously incorrect diameter measurements. For each tree in the sample, one of the two diameter measurements was assumed to be incorrect and was replaced by a predicted estimate from one of the candidate methods. The sample was then put back into the original data set and the estimated basal area plot growth was calculated for that time period. This was then compared to the true plot growth, and the resulting differences were examined. Based upon these differences, it was concluded that ordinary least squares or the introduced standard deviation technique will provide the best results if applied on a plot by plot basis. North. J. Appl. For. 8(2):76-82.

scholarly journals Scientific Contents of the Hipparcos input Catalogue

1995 ◽  
Vol 166 ◽  
pp. 77-82 ◽  
Author(s):  
C. Turon ◽  
A.E. Gomez ◽  
D. Morin
Keyword(s):  
World Wide ◽  
Minor Planets ◽  
The World ◽  
Input Catalogue ◽  
Homogeneous Data

The Hipparcos Input Catalogue -hereafter called HIC– (Turonet al.1992a, Turonet al.1994) contains the observing programme of the Hipparcos mission: 118 000 preselected stars, 48 minor planets and three satellites of major planets. These objects were selected on the grounds of more than 200 scientific programmes proposed by the world-wide astronomical community, and dealing with a large variety of astronomical and astrophysical topics. It contains the most up-to-date, comprehensive and homogeneous data and information related to these programme stars, collected during the years 1981-1990 by the INCA Consortium (Hipparcos INput CAtalogue consortium).

The World Wide Web as Complex Data Set: Expanding the Digital Humanities into the Twentieth Century and Beyond through Internet Research

2016 ◽  
Vol 10 (1) ◽  
pp. 95-109 ◽  
Author(s):  
Michael L. Black
Keyword(s):  
Nineteenth Century ◽  
World Wide Web ◽  
Digital Humanities ◽  
World Wide ◽  
Data Retrieval ◽  
The Internet ◽  
Complex Data ◽  
Data Set ◽  
Web Scraping ◽  
The World

While intellectual property protections effectively frame digital humanities text mining as a field primarily for the study of the nineteenth century, the Internet offers an intriguing object of study for humanists working in later periods. As a complex data source, the World Wide Web presents its own methodological challenges for digital humanists, but lessons learned from projects studying large nineteenth century corpora offer helpful starting points. Complicating matters further, legal and ethical questions surrounding web scraping, or the practice of large scale data retrieval over the Internet, will require humanists to frame their research to distinguish it from commercial and malicious activities. This essay reviews relevant research in the digital humanities and new media studies in order to show how web scraping might contribute to humanities research questions. In addition to recommendations for addressing the complex concerns surrounding web scraping this essay also provides a basic overview of the process and some recommendations for resources.

Choosing to Target: What Types of Countries Get Different Types of World Bank Projects

2010 ◽  
Vol 62 (3) ◽  
pp. 422-458 ◽  
Author(s):  
Matthew S. Winters
Keyword(s):  
International Development ◽  
World Bank ◽  
Good Governance ◽  
Original Data ◽  
Data Set ◽  
Investment Projects ◽  
The World Bank ◽  
The World ◽  
Different Types ◽  
Aid Programs

Well-governed countries are more likely to make use of foreign aid for the purposes of economic development and poverty alleviation. Therefore, if aid agencies are providing funds for the sake of development, these countries should receive more aid and categorically different types of aid as compared with poorly governed countries. In poorly governed countries aid should be given in forms that allow for less discretion. Using an original data set of all World Bank projects from 1996 to 2002, the author distinguishes programmatic projects from investment projects and national from subnational investment projects. If the World Bank allows more discretion in well-governed countries, then it will choose to provide programmatic and national aid for these recipients. The author presents evidence that the World Bank provides a larger proportion of national investment lending in better-governed countries. With regard to programmatic lending, he finds mixed evidence. Among counties eligible for International Development Association (IDA) aid, good governance surprisingly is associated with a lower proportion of programmatic aid, whereas for International Bank for Reconstruction and Development (IBRD) borrowers, good governance is associated with a higher proportion. The author subjects these results to a number of robustness checks. Although he confirms the existing result in the literature that the World Bank provides larger overall amounts of aid to better-governed countries, his examination of the disaggregated data leads to questioning whether both lending wings of the World Bank are designing aid programs in the most prodevelopment way possible.

Extra- and within-system electoral volatility

2016 ◽  
Vol 23 (6) ◽  
pp. 623-635 ◽  
Author(s):  
Scott Mainwaring ◽  
Carlos Gervasoni ◽  
Annabella España-Najera
Keyword(s):  
Original Data ◽  
Data Set ◽  
New Parties ◽  
Electoral Success ◽  
Electoral Volatility ◽  
Descriptive Information ◽  
Time Period ◽  
The World ◽  
And Shifts

We analyze the remarkable differences in the electoral success of new parties and compare the determinants of electoral volatility attributable to new versus established parties. We base our findings on an original data set of total volatility, extra-system volatility, and within-system volatility for 67 democratic countries across all regions of the world since 1945. The article makes three contributions. First, we show that it is important to distinguish between electoral volatility that represents vote shifts among established parties (within-system volatility) and shifts to new parties (extra-system volatility). Second, we provide descriptive information about total, within-system, and extra-system volatility for 67 countries. Third, we analyze the determinants of volatility. Our results show that the causes of within- and extra-system volatility differ markedly. In contrast to Powell and Tucker, for our broader range of countries and longer time period, there are several statistically robust positive findings.

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