Search results for "fer"
showing 10 items of 33109 documents
Ultrafast Interface Charge Separation in Carbon Nanodot-Nanotube Hybrids
2021
Carbon dots are an emerging family of zero-dimensional nanocarbons behaving as tunable light harvesters and photoactivated charge donors. Coupling them to carbon nanotubes, which are well-known electron acceptors with excellent charge transport capabilities, is very promising for several applications. Here, we first devised a route to achieve the stable electrostatic binding of carbon dots to multi- or single-walled carbon nanotubes, as confirmed by several experimental observations. The photoluminescence of carbon dots is strongly quenched when they contact either semiconductive or conductive nanotubes, indicating a strong electronic coupling to both. Theoretical simulations predict a favo…
Il punteruolo delle palme
2010
Augstie purvi kā medus bites Apis mellifera ganības
2018
Bakalaura darba „Augstie purvi kā medus bites Apis mellifera ganības” mērķis bija novērtēt medus bitēm pieejamo ziedputekšņu daudzveidību teritorijā ar augstu sūnu purvu īpatsvaru, izmantojot bišu putekšņu nastiņu analīzi. Putekšņu nastiņas ievāktas 2015. gadā reizi trīs nedēļās no 3 bišu saimēm, kuru pastāvīgā novietne atrodas Teiču purva tuvumā. Izmantotas divas putekšņu analīzes metodes, lai pārliecinātos par datu precizitāti. Veikta biotopu un veģetācijas kartēšana 4 km bišu lidojuma zonā ap dravu. Izmantojot putekšņu analīzes rezultātus, aprēķināti Šenona un Simpsona daudzveidības indeksi. Putekšņu daudzveidība salīdzināta ar 4 dravām, kuru apkārtnē ir dažāds zemes lietojumveids, izman…
Pyły przemysłowe jako źródło ferrimagnetyków na terenach wiejskich województwa opolskiego
2010
Enhancing identification of causal effects by pruning
2018
Causal models communicate our assumptions about causes and effects in real-world phe- nomena. Often the interest lies in the identification of the effect of an action which means deriving an expression from the observed probability distribution for the interventional distribution resulting from the action. In many cases an identifiability algorithm may return a complicated expression that contains variables that are in fact unnecessary. In practice this can lead to additional computational burden and increased bias or inefficiency of estimates when dealing with measurement error or missing data. We present graphical criteria to detect variables which are redundant in identifying causal effe…
Causality-Aware Convolutional Neural Networks for Advanced Image Classification and Generation
2023
Smart manufacturing uses emerging deep learning models, and particularly Convolutional Neural Networks (CNNs) and Generative Adversarial Networks (GANs), for different industrial diagnostics tasks, e.g., classification, detection, recognition, prediction, synthetic data generation, security, etc., on the basis of image data. In spite of being efficient for these objectives, the majority of current deep learning models lack interpretability and explainability. They can discover features hidden within input data together with their mutual co-occurrence. However, they are weak at discovering and making explicit hidden causalities between the features, which could be the reason behind the parti…
Explainable Fuzzy AI Challenge 2022 : Winner’s Approach to a Computationally Efficient and Explainable Solution
2022
An explainable artificial intelligence (XAI) agent is an autonomous agent that uses a fundamental XAI model at its core to perceive its environment and suggests actions to be performed. One of the significant challenges for these XAI agents is performing their operation efficiently, which is governed by the underlying inference and optimization system. Along similar lines, an Explainable Fuzzy AI Challenge (XFC 2022) competition was launched, whose principal objective was to develop a fully autonomous and optimized XAI algorithm that could play the Python arcade game “Asteroid Smasher”. This research first investigates inference models to implement an efficient (XAI) agent using rule-based …
Alteraciones en el proceso de biogénesis de la subunidad 60S ribosómica como terapia contra el cáncer
2023
Los ribosomas son las estructuras subcelulares encargadas de llevar a cabo la síntesis proteica. La biogénesis ribosómica es un proceso muy complejo que comienza con la transcripción del ARN ribosómico por la ARN polimerasa I en el nucléolo. Este tránscrito inicial sufre un largo procesamiento que implica su plegamiento y asociación con las distintas proteínas ribosómicas. Además, el proceso de biogénesis requiere de la participación de un grupo heterogéneo de proteínas denominadas factores de ensamblaje ribosómicos. Se trata de proteínas que ejercen un papel esencial en el proceso de biogénesis ribosómica pero no forman parte del ribosoma maduro. Muchas de estas proteínas establecen intera…
Saproksilo bezmugurkaulnieku daudzveidība lapkoku praulgrauža Osmoderma barnabita (Coleoptera, Scarabaeidae) dzīvotnēs Rundāles novadā
2018
Lapkoku praulgrauzis īpaši aizsargājama suga un indikators lielai saproksilo bezmugurkaulnieku daudzveidībai, saproksilie bezmugurkaulnieki ir paaugstinātā riska grupā saistībā ar to biotopu skaita samazināšanos. Rundāles novadā ir vairākas teritorijas, kuras ir piemērotas lapkoku praulgrauzim kā dzīvotnes. Nav zināms kopējais lapkoku praulgrauža dzīvotņu skaits Rundāles novadā un nav informācijas par to saproksiliem bezmugurkaulniekiem tajās. Izmantojot feromonu lamatas, lai noteiktu lapkoku praulgrauža klātbūtni biotopa līmenī, un parbaudi uz ekskrementiem kokos, lai noteiktu apdzīvotos dobumainos kokus. Izmantojot sijāšanas metodi, ievākt dobumaino koku praulu paraugus un tad laboratorij…
Resolvent estimates for elliptic quadratic differential operators
2011
Sharp resolvent bounds for non-selfadjoint semiclassical elliptic quadratic differential operators are established, in the interior of the range of the associated quadratic symbol.