In this paper we address the energy consumption of the Constraint Application Protocol (CoAP) and the Message Queue Telemetry Transport (MQTT) protocol and compare their overhead. We also pay attention to the use case of security in IoT and analyze the energy consumption when using TLS/DTLS for the two protocols. In our experiments we use ESP32 with libcoap, MQTT, and mbed TLS libraries and conduc

ObjectivesMindfulness, positive self-related attitudes and secure attachment have been shown to protect against psychopathology during adolescence, but it is unknown how these factors are related to each other and which are most strongly linked to psychopathology symptoms.MethodsA cross-sectional research design was used with a large sample of adolescents (aged 14 to 18 years; n = 1660) that compl

As a solution to solving energy consumption and environment problems, photovoltaics has become one type of the promising devices to convert solar energy into electricity directly. In some special areas like in space, a kind of photovoltaics with lightweight and reliable properties is needed to supply power. Therefore, photovoltaics based on the group III-V semiconductor nanowires has been emerged

Den flerspråkiga texten bör studeras och förstås som en situerad händelse. Det är utgångspunkten i denna artikel, som med Caroline Bergvall och hennes ensembles framförande av Drift i norra Italien i september 2018 – och hennes bok med samma namn från 2014 – som exempel undersöker hur och ifall Roman Jakobsons kommunikationsmodell från 1958 kan bidra till en djupare förståelse av verket. Genom att

We define a ray, show how to use ray intervals, and demonstrate how to specify a ray using DirectX Raytracing (DXR).

Recension av Johan Lundbergs När postmodernismen kom till Sverige

Recension av Hilary Mantels Spegeln och ljuset.

The traditional quadratic formula is often presented as the way to compute the intersection of a ray with a sphere. While mathematically correct, this factorization can be numerically unstable when using floating-point arithmetic. We give two little-known reformulations and show how each can improve precision.

Recension av antologin Tranströmer och det politiska, red Gustav Borsgård.

Recension av nyöversättningen av Harper Lees To kill a mockingbird.Title in web version: Harper Lees ”Att döda en härmtrast” är plågsamt aktuellReviewed work: Att döda en härmtrast / Harper Lee, ISBN 9789100168186.

Unlike rasterization, where one can rely on pixel quad partial derivatives, an alternative approach must be taken for filtered texturing during ray tracing. We describe two methods for computing texture level of detail for ray tracing. The first approach uses ray differentials, which is a general solution that gives high-quality results. It is rather expensive in terms of computations and ray stor

We describe simple methods for how to filter environment maps using ray cones and ray differentials in a ray tracing engine.

Background. Chaos Engineering is proposed as a practice to verify a system’s resilience under real, operational conditions. It employs fault injection, is originally developed at Netflix, and supported by several tools from there and other sources. Aims. We aim to intro- duce Chaos Engineering at ICA Gruppen AB, a group of companies whose core business is grocery retail, to improve their systems’

Presupposition is surely one of the most debated notions in the linguistic and philosophical literature. Historically, there are two main theoretical approaches to presuppositions. According to the first one, the semantic view, presuppositions are semantic implications, that is, truth-conditional relations between propositions and statements. In this sense, presuppositions are considered propertie