Why is publishing so expensive?
The simple answer is that quality peer review costs money. As has been regularly pointed out, the reviewers and editors are largely free. In this peer review Utopia, the system would more or less run itself. In the real world, running an efficient review process takes a lot of time and money*.
How many columns is too many SQL?
There is a hard limit of 4096 columns per table, but the effective maximum may be less for a given table. The exact limit depends on several interacting factors. Every table (regardless of storage engine) has a maximum row size of 65,535 bytes.
How much does it cost to publish an article?
Analysts estimate profit margins at 20–30% for the industry, so the average cost to the publisher of producing an article is likely to be around $3,500–4,000. Most open-access publishers charge fees that are much lower than the industry’s average revenue, although there is a wide scatter between journals.
How long does it take to publish a paper in Journal?
If you receive a revise and resubmit it may take another 2–4 months to hear back on the revised article. If your article is accepted, it could take anywhere from a few months to three years for the journal to publish your piece.
How much does it cost to publish a research paper in India?
The publication fee for online monthly journal is Rs 1750 for single author, Rs 2150 for multiple authors.
Why many indexes are not good for performance?
The reason that having to many indexes is a bad thing is that it dramatically increases the amount of writing that needs to be done to the table. This happens in a couple of different places. When a write happens the data first is logged to the transaction log.
How can an undergraduate student publish a research paper?
Attend a Research Commons publishing workshop, such as the Publishing Symposium (while the Research Commons workshops are primarily offered to graduate students, undergraduate students interested in publishing are welcome to attend).
Does indexing improve query performance?
Introduction. Indexes in Oracle and other databases are objects that store references to data in other tables. They are used to improve the query performance, most often the SELECT statement. They aren’t a “silver bullet” – they don’t always solve performance problems with SELECT statements.
Does number of columns affect performance in SQL?
6 Answers. Yes, marginally, with no indexes at all, both queries (Table A and Table B) will do table scans. the performance of the query will be dominated by the indexing on column f , rather than the number of columns in the underlying tables.
Can an index slow down a query?
As shown, indexes can speed up some queries and slow down others. In this article, we provided some basic guidelines for clustered and nonclustered indexes, as well as which columns are preferred to build indexes on, and which should be avoided.
How many columns is too many in database?
9 Answers. The design of the table depends on the entity it needs to store. If all the data belongs together, then 50 columns (or even 100) might be the correct thing to do. So long as the table is normalized, there is no rule of thumb regarding size, apart from database capabilities and the need to optimize.
Do indexes help joins?
Indexes can help improve the performance of a nested-loop join in several ways. The biggest benefit often comes when you have a clustered index on the joining column in one of the tables. The presence of a clustered index on a join column frequently determines which table SQL Server chooses as the inner table.
How can I publish my paper in Elsevier?
- Find a journal. Find out the journals that could be best suited for publishing your research.
- Prepare your paper for submission. Download our get published quick guide, which outlines the essential steps in preparing a paper.
- Submit and revise.
- Track your research.
- Share and promote.
Is indexing good or bad?
Adding indices *generally can only make a read query faster, very very rarely (almost never) slower. Adding an index never forces the query optimizer to use it. It will only use it if it thinks it can benefit from it, and it is generally very smart about those decisions.
What is the maximum number of columns in a table?
Is Scopus index good?
Because Scopus is currently the leading indexing database preferred by a good number of universities, there is a belief that only Scopus indexed journals are reputable. This is not the case.
Can undergraduate students get published?
Most undergraduates do not publish, but it’s quite normal for undergraduates who get involved in research to end up publishing. They get connected to a research project, but their work isn’t publishable.
Which is better Scopus or Esci?
Often more stable indexing compared to Scopus indexing. SCI=Is the ‘original’ database that according to the Clarivate website is “Created as SCI in 1964”. As said by others ESCI indexing provides no impact factor while Scopus does (at least their own impact factor and CiteScore).
Which is better Scopus or SCI?
The citation rates (CPP) of each of the articles identified were found to be higher for all years in the SCI database than in SCOPUS. The articles in the analysis on the same topic had a citation rate of 12 citations per article in SCI, and only 8 citations per article in SCOPUS.
How does indexing improve performance?
It must improve the performance of data matching by reducing the time taken to match the query value. When an index is used to fetch a row, the index is walked until it finds the row(s) of interest, and the base table is then looked up to fetch the actual row data.