scholarly journals Modelling and reconstructing tree ring growth index with climate variables through artificial intelligence and statistical methods

2022 ◽  
Vol 134 ◽  
pp. 108496
Author(s):  
Nasrin Salehnia ◽  
Jinho Ahn
2022 ◽  
Author(s):  
Thomas C. Fallak

Even after various decisions of the German Federal Court of Justice on the concept of illiquidity under insolvency law, the methodology of the test remains unclear. This also applies to the justiciability of business forecasts. The thesis examines whether and within what limits testing for illiquidity can be performed by digital analysis of accounting data. It also describes the extent to which short- and medium-term liquidity planning can be supported by quantitative forecasts. Statistical methods as well as approaches from the field of artificial intelligence are described.


2015 ◽  
Vol 166 (6) ◽  
pp. 389-398 ◽  
Author(s):  
Brigitte Rohner ◽  
Esther Thürig

Development of climate-dependent growth functions for the scenario model “Massimo” Tree growth is substantially influenced by climatic factors. In the face of climate change, climate effects should therefore be included in estimations of Switzerland's future forest productivity. In order to include climate effects in the growth functions of the “Massimo” model, which is typically applied to project forest resources in Switzerland, we statistically modelled climate effects on tree growth representatively for Switzerland by simultaneously considering further growth-influencing factors. First, we used tree ring data to evaluate how climate variables should be defined. This analyses showed that for modelling multi-year tree growth we should use averages of whole-year variables. Second, we fitted nonlinear mixed-effects models separately for the main tree species to individual-tree growth data from the Swiss National Forest Inventory. In these models, we combined climate variables defined according to the results of the tree ring study with various further variables that characterize sites, stands and individual trees. The quantified effects were generally plausible and explained convincingly the physiological differences between the species. The statistical growth models for the main tree species will now be included in the forest scenario model “Massimo”. This will allow for founded analyses of scenarios which assume changing climatic conditions.


Author(s):  
Ephraim Nissan

This article is a concise overview of a field which until the late 1990s did not exist in its own right: computer and computational methods for modeling reasoning on legal evidence and crime analysis and detection. Yet, for various kinds of forensic tests, computer techniques were sometimes used, and statistical methods have had some currency in the evaluation of legal evidence. Until recently it would not have been possible to provide an overarching review such as the present one.


2020 ◽  
Vol 6 (2) ◽  
Author(s):  
Sarah Myers West

Computer scientists, and artificial intelligence researchers in particular, have a predisposition for adopting precise, fixed definitions to serve as classifiers (Agre, 1997; Broussard, 2018). But classification is an enactment of power; it orders human interaction in ways that produce advantage or suffering (Bowker & Star, 1999). In so doing, it obscures the messiness of human life, masking the work of the people involved in training machine learning systems, and hiding the uneven distribution of its impacts on communities (Taylor, 2018; Gray, 2019; Roberts, 2019). Feminist scholars, and particularly feminist scholars of color, have made powerful critiques of the ways in which artificial intelligence systems formalize, classify, and amplify historical forms of discrimination and act to reify and amplify existing forms of social inequality (Eubanks, 2017; Benjamin, 2019; Noble, 2018). In response, the machine learning community has begun to address claims of algorithmic bias under the rubric of fairness, accountability, and transparency. But in doing so, it has largely dealt with these issues in familiar terms, using statistical methods aimed at achieving parity and deploying fairness ‘toolkits’. Yet actually existing inequality is reflected and amplified in algorithmic systems in ways that exceed the capacity of statistical methods alone. This article outlines a feminist critique of extant methods of dealing with algorithmic discrimination. I outline the ways in which gender discrimination and erasure are built into the field of AI at a foundational level; the product of a community that largely represents a small, privileged, and male segment of the global population (Author, 2019). In so doing, I illustrate how a situated mode of inquiry enables us to more closely examine a feedback loop between discriminatory workplaces and discriminatory systems.


Children ◽  
2021 ◽  
Vol 8 (12) ◽  
pp. 1156
Author(s):  
Milica Gajic ◽  
Jovan Vojinovic ◽  
Katarina Kalevski ◽  
Maja Pavlovic ◽  
Veljko Kolak ◽  
...  

The aim of this study was to determine the impact of oral health on adolescent quality of life and to compare the results obtained using standard statistical methods and artificial intelligence algorithms. In order to measure the impact of oral health on adolescent quality of life, a validated Serbian version of the Oral Impacts on Daily Performance (OIDP) scale was used. The total sample comprised 374 respondents. The obtained results were processed using standard statistical methods and machine learning, i.e., artificial intelligence algorithms—singular value decomposition. OIDP score was dichotomized into two categories depending on whether the respondents had or did not have oral or teeth problems affecting their life quality. Human intuition and machine algorithms came to the same conclusion on how the respondents should be divided. As such, method quality and the need to perform analyses of this type in dentistry studies were demonstrated. Using artificial intelligence algorithms, the respondents can be clustered into characteristic groups that allow the discovery of details not possible with the intuitive division of respondents by gender.


2018 ◽  
Vol 8 (16) ◽  
pp. 11-21
Author(s):  
Mohammad mehdi Zarei ◽  
Mohammad taghi Dastorani ◽  
Mansour Mesdaghi ◽  
Masoud Eshghizadeh ◽  
◽  
...  

Sign in / Sign up

Export Citation Format

Share Document