The use of Internet of Things systems has increased to meet the need for smart systems in various fields, such as smart homes, intelligent industries, medical systems, agriculture, and the military. IoT networks are expanding daily to include hundreds and thousands of IoT devices, which transmit information through other linked devices to reach the network sink or gateway. The information follows different routes to the network sink. Finding an ideal routing solution is a big challenge due to several factors, such as power, computation, storage, and memory limitation for IoT devices. In 2011, A new standardized routing protocol for low-power and lossy networks was released by the Internet Engineering task force (IETF). The IETF adopted a distance vector routing algorithm for the RPL protocol. RPL protocol utilizes the objective functions (OFs) to select the path depending on diffident metrics.These OFs with different metrics must be evaluated and tested to develop the best routing solution.This project aims to test the performance of standardized RPL objective functions in a simulation environment. Afterwards, a new objective function with a new metric will be implemented and tested in the same environmental conditions. The performance results of the standard objective functions and the newly implemented objective function will be analyzed and compared to evaluate whether the standard objective functions or the new objective function is better as a routing solution for the IoT devices network.

The forest industry is a fundamental cornerstone of the Swedish economy employing over 70 000 workers on a national scale. In recent years, the industry has seen increased efforts to digitalize operations and management of forestry to reap economical rewards, improve efficiency and gain competitive advantages. Due to living nature of trees, forest-management is a critical activity within the industry; trees and forests maintained properly will reward the owner with not only greater quality and greater quantity of wood, but also a shorter realization of cash flow. Fully realized, data from UPM Skog suggests that proper forest management has the potential to increase forest returns with up to 50 percent. This thesis studies forest management in the context of digitalization with the aim of making forest monitoring more digital and intelligent. In particular, it studies unsupervised monitoring in detail, a subset of remote sensing. Applications and effects of unsupervised monitoring include but are not limited to; enable real-time management of forest inventory, improved planning, time logging to market-fluctuations and enhanced biodiversity. There are a multitude of technologies that could be utilized and applied to achieve unsupervised monitoring and the startingpoint for discussion are the technologies Internet of Things and Enterprise Blockchain. The research is carried out as a case-study utilizing qualitative semi-structured interviews as primary data collection tool combined with a rigorous literature study in the relevant technological areas. The findings of this thesis portray a trade-off between infrastructure, maintainability, precision and latency on the choice of communication technology. Further, it discusses various ways to work around the different drawbacks of specific technology choices and in what contexts they be more or less suitable. Blockchain technology can act as an enabler for multiple novel industrial applications due to is properties of immutability, transparency and trust; however, not critical for unsupervised monitoring applications in the short run. This research serves as a first step in exploring the area of Internet of Things and Blockchain applied to unsupervised monitoring of forestry. In doing so, the thesis addresses infrastructural considerations, economic feasibility as well as key implications in terms of change management. / Skogsindustrin är en hörnsten för svensk ekonomi och sysselsätter fler än 70 000 arbetare på en nationell skala. De senaste åren har industrin sett ökade satsningar mot att digitalisera förvaltning och operation av skog med syftet att nå ekonomisk avkastning, ökad effektivitet och förbättrad konkurrenskraft. Till följd av trädens levandenatur är skogsförvaltning en kritisk aktivitet inom industrin; trä och skog som underhålls på rätt sätt belönar ägaren med både höjd kvalitet på virke och högre kvantitet av virke samt snabbare realisering av kassaflöden. Data från UPM Skog uppskattar att god skogsförvaltning har potential att medföra upp till 50 procent högre avkastning från skogen. Denna uppsats studerar skogsförvaltning inom kontextet av digitalisering med syftet att göra förvaltningen mer digital och mer intelligent. Mer specifikt studeras tillsynslös övervakning (TÖ) i detalj, ett område som kan tolkas som ett subområde till fjärranalys. Tillämpningar och effekter av TÖ inkluderar men är inte begränsat till: möjliggöra real-tids förvaltning av skogsinnehav, förbättrad planering, optimerad avverkning efter marknadens fluktuationer samt också ökad biodiversitet. Det finns flertalet teknologier som kan användas och appliceras för att åstadkomma TÖ och startpunkten i denna uppsats är teknologierna Internet of Things och Enterprise Blockchain. Forskningen är utförd som en fallstudie och nyttjar kvalitativa semistrukturerade intervjuer som primärdata samt en rigorös litteraturanalys inom relevanta teknologiområden. Undersökningsresultaten av denna fallstudie påvisar en avvägning mellan infrastruktur, underhållbarhet, precision och latens på den valda kommunikationsteknologin. Vidare undersöks olika sätt att arbeta runt olika nackdelar med de specifika teknologivalen samt utreder i vilka kontext som teknologierna är mer eller mindre lämpliga. Blockchain kan möjliggöra flertal nya industriella applikationer med hjälp av sina egenskaper som oföränderlighet, transparens och tillförlitlighet; men kan inte bedömas vara kritisk för TÖ utifrån ett kort tidsperspektiv. Denna forskning är ett första steg i att utforska området Internet of Things och Blockchain applicerat mot TÖ i skog. I detta adresseras allt från infrastrukturella frågeställningar, ekonomisk genomförbarhet samt implikationer inom förändringsledning.

Thesis (PhD)-- Stellenbosch University, 2013. / ENGLISH ABSTRACT: Superconducting electronics can make the Square Kilometre Array (SKA) a better instrument. The largest radio telescope in the world will consist of several arrays, the largest of which, consisting of more than 3000 dishes, will be situated primarily in South Africa. The ambitions of the SKA are grand and their realisation requires technology that does not exist today. Current plans see signals in the band of interest ampli ed, channelised, mixed down and then digitised. An all-digital frontend could simplify receiver structure and improve its performance. Semiconductor (analog-to-digital converters) ADCs continue to make great progress and will likely nd applications in the SKA, but superconductor ADCs bene t from higher clock speeds and quantum accurate quantisation. We propose a superconducting softwarede ned radio frontend. The key component of such a frontend is a superconducting ash ADC. We show that employing such an ADC, even a small- to moderately-sized one, will signi cantly improve the instantaneous bandwidth observable by the SKA, yet retain adequate signal-to-noise ratio so as to achieve a net improvement in sensitivity. This improvement could approach factor 2 when compared to conventional technologies (at least for continuum observations). We analyse key components of such an ADC analytically, numerically and experimentally and conclude that fabrication of such an ADC for SKA purposes is certainly possible and useful. Simultaneously, we address the power requirements of high-performance computing (HPC). HPC on a hitherto unprecedented scale is a necessity for processing the vast raw data output of the SKA. Utilising the ultra-low-energy switching events of superconducting switches (certain Josephson junctions), we develop rst demonstrators of the promising eSFQ logic family, achieving experimentally veri ed shift-registers and deserialisers with sub-aJ/bit energy requirements. We also propose and show by simulation how to expand the applicability of the eSFQ design concept to arbitrary (unclocked) gates. / AFRIKAANSE OPSOMMING: Supergeleier-elektronika kan 'n beter instrument maak van die \Square Kilometre Array" (SKA). Die wêreld se grootse radioteleskoop sal bestaan uit etlike skikkings, waarvan die grootste - met meer as 3 000 skottels - hoofsaaklik in Suid-Afrika gesetel sal wees. Die SKA is ambisieus en vereis tegnologie wat nog nie vandag bestaan nie. Volgens huidige planne sal seine in die band van belang versterk, gekanalisieer, afgemeng en dan versyfer word. 'n Heel-digitale kopstuk sal die ontvangerstruktuur kan vereenvoudig en sy prestasie kan verbeter. Halfgeleier analoog-na-digital omsetters (ADOs) verbeter voortdurend en sal waarskynlik toepassings in die SKA vind, maar supergeleier ADOs trek voordeel uit hoër klok spoed en kwantumakkurate kwantisering. Ons stel 'n supergeleier sagteware-gede nieerde radio kopstuk voor. Die sleutelkomponent van so 'n kopstuk is 'n supergeleier \ ash" ADO. Ons toon hoe die gebruik van so 'n ADO, selfs een van klein tot matige bisgrootte, die oombliklike bandwydte waarneembaar deur die SKA aansienlik sal verbeter en 'n voldoende sein-tot-ruis verhouding sal behou, en gevolglik 'n netto verbetering in sensitiwiteit sal bereik. Hierdie verbetering kan, vergeleke met konvensionele tegnologie, 'n faktor van 2 nader (ten minste vir kontinuum waarnemings). Ons analiseer belangrike komponente van so 'n ADO analities, numeries and eksperimenteel en lei af dat die vervaardiging van so 'n ADO vir SKA doeleindes beide moontlik en nuttig is. Terselfdertyd spreek ons die drywingsverkwisting van Hoë-verrigting rekenaars aan. Sulke rekenaars van 'n tot dusver ongekende skaal is 'n noodsaaklikheid vir die verwerking van die enorme rou data uitset van die SKA. Deur die gebruik van die ultra-lae-energie skakels van supergeleier skakelaars (sekere Josephson-vlakke), ontwikkel ons die eerste demonstratiewe hekke van die veelbelowende eSFQ logiese familie, en toon eksperimenteel bevestigte skuifregisters en deserieëliseerders met sub-aJ/bis energievereistes. Ons stel verder voor en wys met simulasies hoe om die toepaslikheid van die eSFQ ontwerpkonsep na arbitr^ere (ongeklokte) hekke uit te brei.

L'impédance d'entrée d'une antenne miniature est fortement affectée par des facteurs environnementaux à l'origine de pertes de puissance réduisant l'efficacité énergétique des têtes radiofréquences dans les applications RF, en particulier dans la télémétrie des implants cardiaques. Le but de mes études est de développer une unité de calibration d'impédance d'antenne très faible consommation capable d'adapter toute variation de l'impédance d'entrée de l'antenne à l'impédance de la source radiofréquence. La première partie de mon étude est axée sur la conception au niveau système d'une approche nouvelle de calibration automatique du système. Un réseau d'adaptation automatique d'impédance sans coupleur et fonctionnant de façon directe est étudié et permet d'optimiser la taille du dispositif, la vitesse de l'adaptation, la consommation d'énergie et les performances globales. Deuxièmement, une nouvelle méthode de synthèse du réseau d'adaptation variable est proposée pour réduire fortement la complexité globale de l'algorithme d'adaptation. La troisième partie de mon étude est axée sur la fabrication d'un démonstrateur hybride fonctionnant dans la bande médicale MICS afin de valider le concept auto adaptatif d'impédance. Un banc expérimental qui comprend une antenne immergée dans son milieu connectée au démonstrateur piloté par un microcontrôleur a été mis en place et a permis d'atteindre un coefficient de réflexion jusqu'à -30dB avec un temps de calibration inférieur à 1ms. La dernière partie de mon travail consiste à concevoir le circuit d'adaptation automatique d'impédance d'antenne très faible consommation fonctionnant dans la bande ISM 2.4GHz en utilisant la technologie CMOS 0.13um. Antenna input impedance is highly affected by environmental factors increasing the losses or reducing the power efficiency of the radiofrequency transceiver in many RF applications such as in implantable pacemaker device telemetry. The purpose of my study is to develop a low power fully integrated antenna-impedance tuning unit to match any variation of the antenna impedance to the source. The first part of my study is focused on the system-level design of a new approach to automatically match the system. A couplerless single step automatic matching network is investigated to optimize the die size, the speed, the power consumption and the overall performance. Second, a new method for synthesizing an automatic matching network is developed reducing strongly the overall complexity of the matching algorithm. The third part of my study is focused on the fabrication of a hybrid demonstrator operating at the Medical Implantable Communication Service (MICS) frequency band to validate the concept. An experimental set-up including the antenna tuning unit, a microcontroller and a pacemaker antenna connected to the demonstrator was done achieving a reflection coefficient up to -30dB, an overall tuning time less than 1ms. The last part of my work is to design the entire automatic matching network circuit in 0.13um CMOS technology including a front-end transceiver designed under ultra low power constraints and operating at 2.4GHz ISM frequency band. The additional items overall power consumption is less than 1.5mW under 1.2V supply voltage.

Silicon-on-Insulator (SOI) CMOS technology constitutes a good candidate for mixed signal RF CMOS applications. Due to its low junction capacitance and reduced leakage current, SOI provides reduced static and dynamic power consumption of the digital logic combined with increased cut-off frequencies. Moreover, in terms of passive device integration the major benefit of SOI when compared to the conventional bulk is the possibility to use a high resistivity substrate which allows a drastic reduction of substrate losses allowing a high quality factor of the passive devices. Another issue is the harsh environment applications. Electronics capable of operating at high temperatures are required in several industrial applications, including the automobile industry, the aerospace industry, the electrical and nuclear power industries, and the well-logging industry. The capability of SOI circuits to expand the operating temperature range of integrated circuits up to 300°C has been demonstrated. SOI devices and circuits present advantages in this field over bulk counterparts such as the absence of thermally-activated latch up and reduced leakage current. In this context, various topologies of integrated transmission lines and spiral inductors implemented on standard and high substrate resistivities have been analyzed over a large temperature range. The temperature behavior of the SOI transistors is presented. The main figures-of-merit of the SOI MOSFETs are analyzed and the extraction of the extrinsic and intrinsic parameters of the small signal equivalent circuit is performed. Also, an example of RF circuit applications of the SOI technology, based on a fully integrated Low-Noise Amplifier for low-power and narrow-band applications, is investigated and characterized at high temperature. The main figures-of-merit of the designed circuit are extracted and discussed. The good results show that the SOI technology is now emerging as a good candidate for the realization of analog integrated circuits for low-power and high-temperature applications.

Since their emergence, Wireless Sensor Networks (WSN) have been growing continually becoming a key player in many applications such as military tracking, remote monitoring, bio-sensing and home automation. These networks are based on IEEE 802.15.4 standard which is dedicated to low rate wireless personal area networks (LR-WPANs) in the unlicensed radio band (868MHz/915MHz/2.4GHz). Low power consumption, low cost of implementation and high level of integration are the main challenges of these systems. As radio frequency transceiver is one of the most power hungry block in wireless sensor node, power consumption of radio frequency front-end (RFFE) must be reduced. To deal with, several approaches are possible, either at circuit level by investigating operating modes of transistors and merging functionalities or at system level by searching novel demodulation architecture. This thesis explores the specific requirements and challenges for the design of ultra-low power radio frequency integrated circuits (RFICs), leading to the design of a compact demodulator implemented in 65 nm CMOS technology and compatible with all modulation schemes.

Nanomagnetic logic, incorporating logic bits in the magnetization orientations of single-domain nanomagnets, has garnered attention as an alternative to transistor-based logic due to its non-volatility and unprecedented energy-efficiency. The energy efficiency of this scheme is determined by the method used to flip the magnetization orientations of the nanomagnets in response to one or more inputs and produce the desired output. Unfortunately, the large dissipative losses that occur when nanomagnets are switched with a magnetic field or spin-transfer-torque inhibit the promised energy-efficiency. Another technique offering superior energy efficiency, “straintronics”, involves the application of a voltage to a piezoelectric layer to generate a strain which is transferred to an elastically coupled magnetrostrictive layer, causing magnetization rotation. The functionality of this scheme can be enhanced further by introducing magnetocrystalline anisotropy in the magnetostrictive layer, thereby generating four stable magnetization states (instead of the two stable directions produced by shape anisotropy in ellipsoidal nanomagnets). Numerical simulations were performed to implement a low-power universal logic gate (NOR) using such 4-state magnetostrictive/piezoelectric nanomagnets (Ni/PZT) by clocking the piezoelectric layer with a small electrostatic potential (~0.2 V) to switch the magnetization of the magnetic layer. Unidirectional and reliable logic propagation in this system was also demonstrated theoretically. Besides doubling the logic density (4-state versus 2-state) for logic applications, these four-state nanomagnets can be exploited for higher order applications such as image reconstruction and recognition in the presence of noise, associative memory and neuromorphic computing. Experimental work in strain-based switching has been limited to magnets that are multi-domain or magnets where strain moves domain walls. In this work, we also demonstrate strain-based switching in 2-state single-domain ellipsoidal magnetostrictive nanomagnets of lateral dimensions ~200 nm fabricated on a piezoelectric substrate (PMN-PT) and studied using Magnetic Force Microscopy (MFM). A nanomagnetic Boolean NOT gate and unidirectional bit information propagation through a finite chain of dipole-coupled nanomagnets are also shown through strain-based "clocking". This is the first experimental demonstration of strain-based switching in nanomagnets and clocking of nanomagnetic logic (Boolean NOT gate), as well as logic propagation in an array of nanomagnets.

Le marché des objets connectés sécurisés est en plein essor et nécessite des plateformes de développement faible consommation pour des applications sans contact dans des facteurs de forme réduits. La réduction du facteur de forme impacte l’antenne et entraîne une baisse de l’énergie disponible dans la puce, qui, pour travailler à performances égales, doit voir sa consommation diminuer drastiquement. Un des principaux contributeurs à la consommation est la mémoire non-volatile embarquée (eNVM) utilisée pour le stockage et l’exécution du code. Il faut donc, pour une technologie donnée, être capable de concevoir des blocs périphériques du plan mémoire de manière à réduire la consommation au maximum. L’objectif de la thèse est donc de sélectionner une technologie eNVM très faible consommation compatible avec le procédé technologie CMOS classique, d’identifier les blocs critiques lors des opérations de la mémoire, et enfin de proposer des solutions de minimisation de la consommation pour chaque bloc critique. Pour ce faire, une étude de toutes les mémoires non volatiles embarquées disponibles sur le marché est réalisée. Il en ressort que la technologie Flash, en particulier la Flash NOR embarquée de type SuperFlash® ESF3, est la mieux adaptée pour les systèmes télé-alimentés. L’étude de la macro Flash NOR montre que durant l’écriture et l’effacement, la consommation du système est en partie liée à la génération de la haute tension par les pompes de charge. Par contre, durant la lecture, les performances globales du système sont déterminées par l’amplificateur de lecture. Ainsi, un travail de conception de chaque bloc individuel est mis en oeuvre pour réduire la consommation. / The market of secure connected devices is booming and requires low power development platforms for contactless applications in reduced form factors. The reduction in the form factor impacts the antenna size and thus leads to a decrease of the energy available in the chip, which should reduce drastically its consumption while keeping performances. One of the main contributors to the chip consumption is the embedded non-volatile memory (eNVM) used for storage and code execution. Therefore, for a given technology, it is necessary to design peripheral blocks of the memory array under strong consumption constraints. The aim of the thesis is to select a very low-power embedded nonvolatile memory technology compatible with the classical CMOS process, to identify the critical blocks during the operations of the memory, and finally to propose solutions to minimize the power consumption of each critical block.In order to do this, a study of all the embedded non-volatile memories available on the market is carried out. It emerges that the Flash technology, in particular the SuperFlash® ESF3 based NOR Flash technology, is best suited for remote-powered systems. The study of the NOR Flash macrocell shows that during write and erase operations, the system consumption is mainly related to the high voltage generation by charge pumps. However, during a read operation, overall performances of the system is determined by the sense amplifier. A design work for each individual block is then implemented to reduce consumption.

Au cours des dernières années, différents travaux de recherche ont été consacrés à l’étude et au développement des solutions de type réseau de capteurs sans fil. Ces travaux sont une réponse à l’augmentation du nombre d’objets connectés dans le monde avec le développement de l’internet des objets. La consommation d’énergie dans les réseaux de capteurs représente un des domaines les plus étudiés. Les communications dans les réseaux de capteurs représentent une part importante de leur consommation. Afin de réduire la consommation des communications dans les réseaux de capteurs, différents niveaux d’optimisation sont possibles. Dans ce contexte, différents travaux de recherches visant à réduire la consommation des émetteurs-récepteurs, grâce à des architectures innovantes, ont été menés à l’IM2NP. Beaucoup de ces travaux ont été consacrés aux radios impulsionnelles Ultra-Large Bande (ULB). En outre, les protocoles d’accès aux canaux de communications dans les réseaux de capteurs sont également importants quant à l’optimisation de leurs consommations. Les travaux de recherches proposés dans ce manuscrit, basés sur les travaux sur les radios impulsionnelles ULB réalisés au sein de l’IM2NP, proposent une optimisation de la consommation des réseaux de capteurs sur deux niveaux. Tout d’abord, un protocole asynchrone à base de radio de réveil d’accès au canal de communication adapté aux communications ULB est proposé ainsi que son étude énergétique. Suite à l'étude du protocole asynchrone proposé, la conception d’un récepteur de réveil semi-passif et d’un générateur d’impulsion ULB sous-GHz est abordée, et leurs performances en termes d’efficacité énergétique discutées. / In recent years, research has been devoted to the study and development of Wireless Sensor Network (WSN). These research are a response to the increase of the connected objet number in the world with development of smartphones and Internet of things (IoT). Energy consumption in sensor networks is one of the most studied areas. In fact, the optimization of the consumption of the elements making up the sensor networks allows a reduction in the costs associated with their installation, operation and maintenance. Communications in sensor networks represent an important part of their power consumption. In order to reduce the consumption of communications in sensor networks, different levels of optimization are possible. In this context, various IM2NP research projects aimed at reducing transceiver consumption through innovative design were carried out. Much of this work has been devoted to Impulsionnal Radio Ultra-Wide Band (IR-UWB). Moreover, MAC protocols used to manage the communication channel access in wireless sensor networks are also important in optimizing their consumption. The research work proposed in this manuscript, based on the work on impulse radios UWB carried out within the IM2NP, propose an optimization of the consumption of sensor networks on two levels. Firstly, an asynchronous MAC protocol based on radio wake-up radio suitable for UWB communications is proposed as well as its energy study. Following the study of the proposed asynchronous protocol, the design of a low power semi-passive wake-up receiver (WuRx) and a UWB sub-GHz impulse generator is presented and their performance in terms of energy efficiency discussed.

Introdução: A cicatrização e a manutenção da integridade tissular da úlcera venosa (UVe) consiste em uma cascata de eventos celulares e moleculares que interagem entre si para que ocorra a regeneração tecidual. O seu tratamento depende da associação de diferentes mecanismos por meio da aplicação de produtos tópicos e do uso de terapia compressiva. Apesar dos avanços tecnológicos relativos à oferta e ao desenvolvimento de coberturas tecnológicas ainda não há impacto efetivo na incidência dessas lesões, o que repercute em elevados custos financeiros e em prejuízo aos pacientes. Atualmente, a Terapia a Laser de Baixa Potência (TLBP) vem sendo utilizada para acelerar o processo cicatricial em diferentes lesões graças à sua ação bioestimulatória e anti-inflamatória, o que possibilita o seu uso em UVe. Para direcionar a escolha do tratamento mais adequado, entretanto, é fundamental uma avaliação acurada da lesão. Diante disso, a Nursing Outcomes Classification (NOC) possui os resultados de enfermagem, que permitem avaliar o efeito do tratamento por meio de indicadores clínicos. Objetivo: Comparar o efeito do tratamento adjuvante de Terapia a Laser de Baixa Potência (TLBP) com o tratamento convencional na reparação tecidual de úlcera venosa em pacientes ambulatoriais. Método: Ensaio clínico randomizado realizado em um hospital universitário brasileiro. A amostra consistiu de 40 pacientes com UVe, randomizados em número igual para o Grupo Controle (GC) e Grupo Intervenção (GI), acompanhados no segmento de dezesseis semanas ou até a cicatrização da lesão. O GC recebeu tratamento convencional com curativos tópicos e terapia compressiva, enquanto que ao GI foi adicionado a TLBP como adjuvante. Foi utilizada uma dose de energia de 1 a 3 J/cm2 com um laser AsGalaser, com comprimento de onda de 660 nm. A aplicação ocorreu de forma pontual nas bordas e método de varredura no leito da lesão. O processo de cicatrização foi avaliado, em ambos os grupos, por oito indicadores clínicos do resultado Cicatrização de feridas: segunda intenção (1103): Tamanho da ferida diminuído, Formação de cicatriz, Granulação, Exsudato, Odor desagradável da ferida, Pele macerada, Eritema na pele ao redor da lesão e Edema perilesão. A avaliação também ocorreu a partir de seis indicadores do resultado Integridade tissular: pele e mucosas (1101): Espessura, Hidratação/Descamação, Pigmentação anormal, Prurido, Dor e Necrose. A análise levou em consideração a escala Likert de 5 pontos, em que 1 corresponde ao pior escore e 5 ao mais desejável, utilizando o Generalized Estimating Equation. O estudo foi aprovado em Comitê de Ética (15-0634). Resultados: A média de idade foi de 64,55±11,69 anos para o GC e 63±12,25 para o GI. No GC, 17(85%) pacientes eram do sexo masculino, enquanto que no GI prevaleceu o sexo feminino com 11(55%) pacientes, gerando a única diferença estatística significativa (p=0,019) entre os grupos. A cor branca (16-80%) e a escolaridade no nível de analfabeto funcional (15-75% no GC e 12- 63,2% no GI) prevaleceram nos grupos. Em relação ao tempo de ferida, 40% dos pacientes de ambos os grupos a possuem de um a cinco anos. Foram avaliadas 82 feridas, sendo 39 do GC e 43 do GI, resultando em 1066 consultas, das quais 551 ocorreram no GC e 515 no GI. Quanto ao resultado Cicatrização de feridas: segunda intenção (1103), o GC iniciou com um escore médio de 2,87±0,35 e, ao final do estudo, apresentou 4,21±0,60, enquanto que o GI iniciou com 2,67±0,46 e alcançou 4,46±0,47 (p=0,025). Houve diferença estatisticamente significativa na comparação entre os grupos em quatro dos oito indicadores: Granulação 9 (p=0,010), Tamanho reduzido (p=0,010), Formação de cicatriz (p=0,034) e Exsudato (p=0,011). Em relação ao Resultado Integridade tissular: pele e mucosas (1101) o GC iniciou com um escore médio de 3,74±0,38 e atingiu 4,27±0,46 na última consulta, enquanto que o GI iniciou com 3,43±0,42 e alcançou 4,29±0,44. Na análise dos seis indicadores do resultado NOC observou-se diferença estatisticamente significativa em três deles: Pigmentação anormal (p=0,008), Espessura (p=0,010) e Hidratação/Descamação (p=0,015) na comparação entre os grupos. Quanto ao tratamento convencional, agrupados em classe de ação, no GC prevaleceu o desbridamento enzimático (17,8%), curativos para o controle da infecção (52,8%) e agentes tópicos para manutenção do meio úmido (52,7%). Já no GI despontaram os curativos para o controle do exsudato (9,0%), agentes tópicos para proteção dos bordos (31,3%) e para pele perilesional (104,2%). Na TLBP foi utilizado o laser vermelho, com o modo de irradiação varredura predominantemente no leito da úlcera (97,7%), com um tempo médio de um minuto, na potência de 30mW. O modo de irradiação pontual foi usado nos bordos da lesão, com maior predomínio (61,8%) de 10 pontos, a uma distância de um cm cada, com energia de 1J/cm2. Esse modo também foi usado na área perilesional, porém, com uma energia de 21J/cm2. Conclusão: A TLBP é um tratamento adjuvante eficaz para a regeneração tecidual de UVe, confirmado pelos indicadores clínicos dos resultados da NOC. / Introduction: The healing and maintenance of tissue integrity of the venous ulcer (VU) consists of a cascade of cellular and molecular events that interact with each other for tissue regeneration to occur. Its treatment depends on the association of different mechanisms through the application of topical products and the use of compressive therapy. Despite technological advances related to the supply and development of technological coverage, there is still no effective impact on the incidence of these injuries, which has high financial costs and damages to patients. Currently, Low-level Laser Therapy (LLLT) has been used to accelerate the cicatricial process in different lesions thanks to its biostimulatory and anti-inflammatory action, which allows its use in VU. In order to guide the choice of the most appropriate treatment, however, an accurate evaluation of the lesion is essential. Nursing Outcomes Classification (NOC) has the results which allow the evaluation of the effect of treatment through clinical indicators. Objective: To compare the effect of adjunctive treatment of LLLT with the conventional treatment in tissue repair of venous ulcer in patients at the Outpatient Nursing clinic. Method: Randomized clinical trial performed at a Brazilian university hospital. The sample consisted of 40 patients with VU, equally randomized to the Control Group (CG) and Intervention Group (GI). Patients were followed up at a weekly nursing visit for 16 weeks or until the lesion was healed. GC received conventional treatment with topical dressings and compressive therapy, while GI was added to TLBP as an adjuvant. An energy dose of 1 to 3 J / cm 2 was used with an AsGalaser laser, with a wavelength of 660 nm. The application occurred punctually at the edges and scanning method in the lesion bed. The wound healing process was evaluated in both groups by eight clinical indicators of Wound healing: second intention (1103): Decreased wound size, Scar formation, granulation, Exudate, Fow wound odor, Macerated skin, Surrounding skin erythema and Periwound edema. The evaluation also occurred from six outcome indicators Tissue integrity: skin and mucous membranes (1101): Thickness, Hydration / Skin flaking, Abnormal Pigmentation, Pruritus, Pain and Necrosis. The analysis took into account the 5-point Likert scale, in which 1 corresponds to the worst score and 5 to the most desirable, using the Generalized Estimating Equation. The study was approved by the Ethics Committee (15-0634). Results: The mean age was 64.55 ± 11.69 years for GC and 63 ± 12.25 for GI. In the CG, 17 (85%) patients were male, whereas in GI female patients prevailed with 11 (55%) patients, generating the only statistically significant difference (p = 0.019) between the groups. The white color (16-80%) and schooling at the level of functional illiterate (15-75% in CG and 12- 63,2% in IG) prevailed in the groups. Regarding wound time, 40% of patients in both groups have one to five years. Eighty-two wounds were evaluated, 39 of GC and 43 of GI, resulting in 1066 consultations, of which 551 occurred in GC and 515 in GI. Regarding wound healing: second intention (1103), GC started with a mean score of 2.87 ± 0.35 and, at the end of the study, presented 4.21 ± 0.60, while GI started with 2.67 ± 0.46 and reached 4.46 ± 0.47 (p = 0.025). There was a statistically significant difference in the comparison between the groups in four of the eight indicators: Granulation (p = 0.010), Decreased wound size (p = 0.010), Scar formation (p = 0.034) and Exudate (p = 0.011). Regarding the Outcome Tissue integrity: skin and mucous membranes (1101), GC started with a mean score of 3.74 ± 0.38 and reached 4.27 ± 0.46 in the last visit, while the GI started with 3.43 ± 0.42 and reached 4.29 ± 0.44. In 11 the analysis of the six indicators of the NOC result, a statistically significant difference was observed in three of them: Abnormal pigmentation (p = 0.008), Thickness (p = 0.010) and Hydration / Skin flaking (p = 0.015) in the comparison between groups. Regarding the conventional treatment, grouped in action class, the CG prevailed enzymatic debridement (17.8%), dressings for infection control (52.8%) and topical agents for maintenance of the humid environment (52.7%). In the GI, dressings for exudate control (9.0%), topical agents for edge protection (31.3%) and perlesional skin (104.2%) emerged. In LLLT the red laser was used, with the mode of irradiation sweeping predominantly in the ulcer bed (97.7%), with an average time of one minute, in the power of 30mW. The mode of point irradiation was used at the edges of the lesion, with a predominance (61.8%) of 10 points, at a distance of one cm each, with energy of 1J/cm2. This mode was also used in the perilesional area, however, with an energy of 21J / cm2. Conclusion: LLLT is an effective adjuvant treatment for tissue regeneration of VU and confirms the clinical indicators of NOC outcome.