Solar Powered Robotic Vehicle for Optimal Battery Charging Using PIC Microcontroller

2019 ◽  
pp. 130-136
Author(s):  
Ganesh Prabhu S ◽  
Karthik S ◽  
Satheesh Kumar ◽  
Thirrunavukkarasu RR ◽  
Logeshkumar S
Keyword(s):  
The Other ◽  
Solar Panels ◽  
Charging System ◽  
Robotic Exploration ◽  
Solar Tracking ◽  
Li Po ◽  
Robotic Vehicle ◽  
Solar Powered ◽  
The One ◽  
Power System Performance

This paper focuses on the design and construction of an optimization charging system for Li–Po batteries by means of tracked solar panels. Thus, the implementation of a complete energy management system applied to a robotic exploration vehicle is put forward. The proposed system was tested on the VANTER robotic platform — an autonomous unmanned exploration vehicle specialized in recognition. The interest of this robotic system lies in the design concept, based on a smart host microcontroller. On this basis, our proposal makes a twofold significant contribution. On the one hand, it presents the construction of a solar tracking mechanism aimed at increasing the rover’s power regardless of its mobility. On the other hand, it proposes an alternative design of power system performance based on a pack of two batteries. The aim is completing the process of charging a battery independently while the other battery provides all the energy consumed by the robotic vehicle.

scholarly journals Development of a Solar-Powered Unmanned Aerial Vehicle for Extended Flight Endurance

Drones ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 44
Author(s):  
Yau Hei Chu ◽  
Chun Leung Ho ◽  
Yoon Jo Lee ◽  
Boyang Li
Keyword(s):  
Power System ◽  
Unmanned Aerial Vehicle ◽  
Flight Control ◽  
Solar Power ◽  
Weather Conditions ◽  
Solar Panels ◽  
Experimental Conditions ◽  
Aerial Vehicle ◽  
Solar Powered ◽  
Power System Performance

Having an exciting array of applications, the scope of unmanned aerial vehicle (UAV) application could be far wider one if its flight endurance can be prolonged. Solar-powered UAV, promising notable prolongation in flight endurance, is drawing increasing attention in the industries’ recent research and development. This work arose from a Bachelor’s degree capstone project at Hong Kong Polytechnic University. The project aims to modify a 2-metre wingspan remote-controlled (RC) UAV available in the consumer market to be powered by a combination of solar and battery-stored power. The major objective is to greatly increase the flight endurance of the UAV by the power generated from the solar panels. The power system is first designed by selecting the suitable system architecture and then by selecting suitable components related to solar power. The flight control system is configured to conduct flight tests and validate the power system performance. Under fair experimental conditions with desirable weather conditions, the solar power system on the aircraft results in 22.5% savings in the use of battery-stored capacity. The decrease rate of battery voltage during the stable level flight of the solar-powered UAV built is also much slower than the same configuration without a solar-power system.

scholarly journals Construction and Automation of a Microcontrolled Solar Tracker

Processes ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 1309
Author(s):  
Juliano da Rocha Queiroz ◽  
Anacreone da Silva Souza ◽  
Maurício Klein Gussoli ◽  
Júlio César Dainezi de Oliveira ◽  
Cid Marcos Gonçalves Andrade
Keyword(s):  
Control Systems ◽  
The Other ◽  
Automation System ◽  
Solar Panels ◽  
Dc Motors ◽  
Solar Tracking ◽  
Solar Tracker ◽  
And Control ◽  
Cross Structure ◽  
Solar Rays

A solar tracker can be defined as an electromechanical system capable of following the apparent path of the Sun, in order to orient an array of solar panels and/or collectors directly to the solar rays, maximizing the collected energy. Accordingly, the present work describes the process of building and automating a micro-controlled solar tracker. Two mobile structures were built, one equipped with high-precision step motors and four luminosity sensors separated in quadrants by a cross structure, and the other equipped with DC motors and the 275 Wp solar panel, allowing the design and evaluation of the behavior of each structure separately. The control and automation system is centralized in an Arduino MEGA2560 microcontroller, which runs the tracking and positioning algorithms. The built prototype allows us to carry out studies of solar tracking strategies based on sensor and control systems applied to DC motors.

scholarly journals Numerical Evaluation of the Solar Collectors Selfshading Related to their Building Integration

2017 ◽  
Vol 13 (4) ◽  
pp. 12-26
Author(s):  
Andrei Damian ◽  
Marian Alexandru ◽  
Tiberiu Catalina
Keyword(s):  
Numerical Evaluation ◽  
Vertical Surface ◽  
The Other ◽  
The Sun ◽  
Solar Panels ◽  
Climatic Zones ◽  
Solar Systems ◽  
One Year ◽  
The One ◽  
Different Levels

AbstractIn view of the recent preoccupation at worldwide level, for the integration of the solar systems components within the building skin, we made a numerical investigation in order to assess the opportunity to implement a long string of solar panels along a horizontal or vertical building surface.The study analyses deals with the phenomenon of self-shading, which appears in the case of medium and large solar systems that use solar panels placed one behind the other, along the same row (individual string), but also under the shape of parallel rows (parallel strings). The study creates a mathematical instrument for the evaluation of the shaded surface depending on the location of the panels and the relative position of the Sun. The shading-caused energy loss is analysed along the one-year period, for each of the 12 months, while the panels are considered either placed on a horizontal surface such as a building terrace, or on a vertical surface, such as a building facade. The simulations are made for six Romanian cities located in different climatic zones, characterized by different levels of solar radiation.

Li Bai and Du Fu

2014 ◽  
Author(s):  
Paula Varsano
Keyword(s):  
Literary History ◽  
The Other ◽  
Historical Imagination ◽  
Du Fu ◽  
Bai Juyi ◽  
Li Po ◽  
Li Bai ◽  
The One ◽  
Li Bo

The tradition of pairing poets—long a staple in the Chinese literary historical imagination—is something that has come and, for the most part, gone. Until recently, most people educated in the tradition would have no trouble reeling off a number of such pairs, some of them involving social connections, but all of them constructed to highlight either complementary or reinforcing sets of poetic aesthetics. Of all the poetic pairs that populate Chinese literary history, it is perhaps Li Bai 李白 (b. 701–d. 762, whose name is also transliterated as Li Po, Li Bo, and occasionally Li Taibai 李太白) and Du Fu 杜甫 (b. 712–d. 770) who form the most compelling one, not least because, from the beginning, theirs was uniquely conceived in evaluative terms; in the literary imagination they were, and remain, the Two Greatest Poets of the Tang—or even of China. Yet, as is inevitable when discussions turn to qualitative rankings, the pair as such became an object of contention. Inevitably, one or the other of the two poets would be construed as being “greater” than the other. From the earliest moment of their pairing, which we can date to the Middle Tang writings of Han Yu and Bai Juyi, there developed what we can rightly call the “Li-Du debate,” the terms of which became so deeply ingrained in the critical discourse surrounding these two poets that almost any characterization of the one implicitly critiqued the other. Remarkably, no argument attempting to reverse the terms or discredit this practice has quite succeeded in dissolving the cultural ties that bind Li Bai and Du Fu. The bibliography presented here is organized in three parts: the section devoted to Li Bai, the elder of the two, is first; Du Fu is next; and the Li Bai and Du Fu section is last. This organization encourages researchers to think of the poets separately before attempting to understand them as a pair. Still, notwithstanding this precaution, scholars will most certainly notice the chicken-and-egg genesis of much of the relevant critical terminology. Thus, it is advisable to consult the reception histories and surveys-of-the-field pertaining to both poets to have a fuller understanding of the scholarship pertaining to each.

Note on Selection of Coordinate Systems for Geodynamics

1975 ◽  
Vol 26 ◽  
pp. 395-407
Author(s):  
S. Henriksen
Keyword(s):  
Sea Level ◽  
The Other ◽  
Coordinate Systems ◽  
Mean Sea Level ◽  
The Earth ◽  
The One ◽  
Static Systems ◽  
Selection Of

The first question to be answered, in seeking coordinate systems for geodynamics, is: what is geodynamics? The answer is, of course, that geodynamics is that part of geophysics which is concerned with movements of the Earth, as opposed to geostatics which is the physics of the stationary Earth. But as far as we know, there is no stationary Earth – epur sic monere. So geodynamics is actually coextensive with geophysics, and coordinate systems suitable for the one should be suitable for the other. At the present time, there are not many coordinate systems, if any, that can be identified with a static Earth. Certainly the only coordinate of aeronomic (atmospheric) interest is the height, and this is usually either as geodynamic height or as pressure. In oceanology, the most important coordinate is depth, and this, like heights in the atmosphere, is expressed as metric depth from mean sea level, as geodynamic depth, or as pressure. Only for the earth do we find “static” systems in use, ana even here there is real question as to whether the systems are dynamic or static. So it would seem that our answer to the question, of what kind, of coordinate systems are we seeking, must be that we are looking for the same systems as are used in geophysics, and these systems are dynamic in nature already – that is, their definition involvestime.

Stories and the Self

2020 ◽  
Vol 32 (2) ◽  
pp. 47-58 ◽  
Author(s):  
Stefan Krause ◽  
Markus Appel
Keyword(s):  
Meta Analysis ◽  
The Self ◽  
The Other ◽  
Lower Degree ◽  
Contrast Effects ◽  
Self Perception ◽  
Self Perceptions ◽  
Other Hand ◽  
The One ◽  
Implicit And Explicit

Abstract. Two experiments examined the influence of stories on recipients’ self-perceptions. Extending prior theory and research, our focus was on assimilation effects (i.e., changes in self-perception in line with a protagonist’s traits) as well as on contrast effects (i.e., changes in self-perception in contrast to a protagonist’s traits). In Experiment 1 ( N = 113), implicit and explicit conscientiousness were assessed after participants read a story about either a diligent or a negligent student. Moderation analyses showed that highly transported participants and participants with lower counterarguing scores assimilate the depicted traits of a story protagonist, as indicated by explicit, self-reported conscientiousness ratings. Participants, who were more critical toward a story (i.e., higher counterarguing) and with a lower degree of transportation, showed contrast effects. In Experiment 2 ( N = 103), we manipulated transportation and counterarguing, but we could not identify an effect on participants’ self-ascribed level of conscientiousness. A mini meta-analysis across both experiments revealed significant positive overall associations between transportation and counterarguing on the one hand and story-consistent self-reported conscientiousness on the other hand.

Radioimmunotherapy for treatment of acute myeloid leukaemia and myelodysplastic syndrome

2005 ◽  
Vol 44 (03) ◽  
pp. 107-117
Author(s):  
R. G. Meyer ◽  
W. Herr ◽  
A. Helisch ◽  
P. Bartenstein ◽  
I. Buchmann
Keyword(s):  
Acute Myeloid Leukaemia ◽  
Myeloid Leukaemia ◽  
Primary Tumour ◽  
The Other ◽  
Haematopoietic Stem Cell ◽  
Other Hand ◽  
Primary Reduction ◽  
The One ◽  
Acute Myeloid

SummaryThe prognosis of patients with acute myeloid leukaemia (AML) has improved considerably by introduction of aggressive consolidation chemotherapy and haematopoietic stem cell transplantation (SCT). Nevertheless, only 20-30% of patients with AML achieve long-term diseasefree survival after SCT. The most common cause of treatment failure is relapse. Additionally, mortality rates are significantly increased by therapy-related causes such as toxicity of chemotherapy and complications of SCT. Including radioimmunotherapies in the treatment of AML and myelodyplastic syndrome (MDS) allows for the achievement of a pronounced antileukaemic effect for the reduction of relapse rates on the one hand. On the other hand, no increase of acute toxicity and later complications should be induced. These effects are important for the primary reduction of tumour cells as well as for the myeloablative conditioning before SCT.This paper provides a systematic and critical review of the currently used radionuclides and immunoconjugates for the treatment of AML and MDS and summarizes the literature on primary tumour cell reductive radioimmunotherapies on the one hand and conditioning radioimmunotherapies before SCT on the other hand.

Das Ende der Postdemokratie, den Pessimismus überwinden.

2017 ◽  
Vol 47 (188) ◽  
pp. 487-494
Author(s):  
Daniel Mullis
Keyword(s):  
Political Thought ◽  
Social Dynamics ◽  
Social Conditions ◽  
The Other ◽  
Economic Decline ◽  
Far Right ◽  
Windows Of Opportunity ◽  
Political Events ◽  
Political Struggles ◽  
The One

In recent years, political and social conditions have changed dramatically. Many analyses help to capture these dynamics. However, they produce political pessimism: on the one hand there is the image of regression and on the other, a direct link is made between socio-economic decline and the rise of the far-right. To counter these aspects, this article argues that current political events are to be understood less as ‘regression’ but rather as a moment of movement and the return of deep political struggles. Referring to Jacques Ranciere’s political thought, the current conditions can be captured as the ‘end of post-democracy’. This approach changes the perspective on current social dynamics in a productive way. It allows for an emphasis on movement and the recognition of the windows of opportunity for emancipatory struggles.

Tolerance is theoretical and practical principles

1996 ◽  
pp. 13-23
Author(s):  
Mykhailo Babiy
Keyword(s):  
Religious Diversity ◽  
The Other ◽  
Nodal Points ◽  
Characteristic Features ◽  
The One ◽  
Ukrainian Society

Political ideological pluralism, religious diversity are characteristic features of modern Ukrainian society. On the one hand, multiculturalism, socio-political, religious differentiation of the latter appear as important characteristics of its democracy, as a practical expression of freedom, on the other - as a factor that led to the deconsocialization of society, gave rise to "nodal points" of tension, confrontational processes, in particular, in political and religious spheres.

The Salvage of Ideas: Schumpeter and the Core Problems Still Confronting Economics

2003 ◽  
pp. 15-26
Author(s):  
P. Wynarczyk
Keyword(s):  
The Other ◽  
The Core ◽  
Other Hand ◽  
The One

Two aspects of Schumpeter' legacy are analyzed in the article. On the one hand, he can be viewed as the custodian of the neoclassical harvest supplementing to its stock of inherited knowledge. On the other hand, the innovative character of his works is emphasized that allows to consider him a proponent of hetherodoxy. It is stressed that Schumpeter's revolutionary challenge can lead to radical changes in modern economics.

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