Results 41 to 50 of about 38,610 (131)
European Journal of Inorganic Chemistry, Volume 28, Issue 25, September 11, 2025.The two novel Zn‐ and Co‐based coordination polymers with the redox‐active (H)PZDB−/2− linker exhibit oxidative color changes due to radical cation formation of the linker as confirmed by spectroelectrochemical analysis. The novel coordination polymers [Zn(PZDB)(DEF)2]n (Zn‐PZDB) and [Co(HPZDB)2(DEF)2]n (Co‐HPZDB) (H2PZDB = 4,4′‐(phenazine‐5,10‐diyl ...
Dietrich Püschel +10 more
wiley +1 more source
Creating an Interactive Web Interface for Networks Stored in Knowledge Graph Databases
Current Protocols, Volume 5, Issue 9, September 2025.Abstract Knowledge graphs (KG) are an emerging approach to organize biomedical research data by abstracting knowledge into networks that connect genes, diseases, pathogens, drugs, metabolites, cell types, pathways, patients, researchers, and other related concepts.
John Erol Evangelista +6 more
wiley +1 more source
Layer Sliding‐Induced Fluorescence Changes in a Flexible Hydrogen‐Bonded Organic Framework
Chemistry – A European Journal, Volume 31, Issue 46, August 18, 2025.A fluorescence color change from blue to green of pyrene‐based HOFs was achieved by the sliding of the H‐bonded 2D network layers. Single‐crystal XRD analysis revealed that the 2D‐layer sliding forms a pyrene dimer, which results in the green color of the HOF emission including the excimer contribution.
Taito Hashimoto +5 more
wiley +1 more source
A Formalization of SQL with Nulls [PDF]
, 2020 Wilmer Ricciotti, James Cheney
openalex +1 more source
Queries with Guarded Negation (full version) [PDF]
, 2012 A well-established and fundamental insight in database theory is that negation (also known as complementation) tends to make queries difficult to process and difficult to reason about.
Barany, Vince +2 more
core
SISTEM INFORMASI EVALUASI NILAI HASIL BELAJAR SISWA MENGGUNAKAN VISUAL BASIC 6.0 DAN MICROSOFT ACCESS DI SMA NEGERI 1 GAMPING [PDF]
, 2012 Evaluasi terhadap nilai hasil belajar siswa sebagian besar masih menggunakan sistem manual rentan terhadap kesalahan dan tidak efisien. Penelitian ini bertujuan untuk menghasilkan perangkat lunak sistem informasi evaluasi nilai hasil belajar siswa ...
Muhammad Dwiky, Khalifardhi
core
On the Codd Semantics of SQL Nulls
, 2017 Theoretical models used in database research often have subtle differences with those occurring in practice. One particular mismatch that is usually neglected concerns the use of marked nulls to represent missing values in theoretical models of incompleteness, while in an SQL database these are all denoted by the same syntactic NULL object.
Guagliardo, Paolo, Libkin, Leonid
openaire +1 more source
Transforming N-ary relationships to database schemas: an old and forgotten problem [PDF]
, 2002 The N-ary relationships, have been traditionally a source of confusion and still are. One important source of confusion is that the term cardinality in a relationship has several interpretations, two of them being very popular.
Camps Pare, Rafael
core +1 more source
Design, implementation and experiment of a YeSQL Web Crawler
, 2012 We describe a novel, "focusable", scalable, distributed web crawler based on GNU/Linux and PostgreSQL that we designed to be easily extendible and which we have released under a GNU public licence.
Deveaud, Romain +4 more
core +1 more source
Compiling ER Specifications into Declarative Programs
, 2007 This paper proposes an environment to support high-level database programming in a declarative programming language. In order to ensure safe database updates, all access and update operations related to the database are generated from high-level ...
Braßel, Bernd +2 more
core +1 more source