text large_stringlengths 8 763k | nome_professor large_stringclasses 19
values |
|---|---|
#include"PILHAD.h"
//void texto(FILE *);
int main(){
imprimeInicio();
//Inicializando a Pilha!!
topo = inicializar();
imprimepilha_din();
//Operação de Push
push('O');
imprimepush('O');
imprimepilha_din();
//Operação de Push
push('C');
imprimepush('C');
imprimepilha_din();
//Operação de Push
push('I');
imprimepush('I')... | ANDRE CASTELO BRANCO SOARES |
// main.c
// listaCircularSimples
// Created by Andre Soares on 02/10/2018.
// Copyright © 2018 Andre Soares. All rights reserved.
#include
#include
#include
#include "circularOrdenada.h"
void preenchimento (listaOrdem* a){
REGISTRO livro;
livro.chave=10; // inserção lista vazia
strcpy( livro.nomeLivro, "Estrutura de d... | ANDRE CASTELO BRANCO SOARES |
#include "PILHA.h"
int main(){
principal();
return 0; | ANDRE CASTELO BRANCO SOARES |
// main.c
// listaCircularOrdemSimples
// Created by Andre Soares on 03/10/2018.
// Copyright © 2018 Andre Soares. All rights reserved.
#include
#include "listaCircularSimplesInsFinal.h"
void preenchimento (lista* a){
REGISTRO livro;
livro.chave=10; // inserção lista vazia
strcpy( livro.nomeLivro, "Estrutura de dados 1... | ANDRE CASTELO BRANCO SOARES |
// main.c
// lista
// Created by Andre Soares on 19/09/2018.
// Copyright © 2018 Andre Soares. All rights reserved.
#include
#include
#define MAX 50
typedef struct{
int chave;
char nomeLivro[30];
char idioma[10];
int paginas;
} REGISTRO;
typedef struct{
REGISTRO v[MAX];
int numerElementos;
} lista;
void inserirElemFina... | ANDRE CASTELO BRANCO SOARES |
// main.c
// lista
// Created by Andre Soares on 19/09/2018.
// Copyright © 2018 Andre Soares. All rights reserved.
#include
#include
#include
typedef struct{
int chave;
char nomeLivro[30];
char idioma[10];
int paginas;
} REGISTRO;
typedef struct aux{
REGISTRO reg;
struct aux* prox;
} itemLivro;
typedef struct{
itemLiv... | ANDRE CASTELO BRANCO SOARES |
Estruturas
de Dados I
DC/CCN/UFPIErico Leão e André Soares
Pilhas Dinâmicas
Estruturas
de Dados I
DC/CCN/UFPIErico Leão e André Soares21
Pilhas DinâmicasØEntretanto, existe uma classe de aplicações onde o tamanho máximo de elementos não é conhecido a priori.oNesse caso, devemos implementar Pilhas usando uma estrutura d... | ANDRE CASTELO BRANCO SOARES |
Enabling Direct Messaging from LoRa to ZigBee in the 2.4 GHz Band for Industrial Wireless Networks Junyang Shi, Xingjian Chen, Mo Sha Department of Computer Science State University of New Y ork at Binghamton {jshi28, xchen218, msha }@binghamton.edu Abstract—IEEE 802.15.4-based wireless sensor-actuator networks (WSANs)... | ANDRE CASTELO BRANCO SOARES |
and difficult to reconfigure to accommodate new production requirements. Wireless sensor-actuator network (WSAN) technology is appealing for use in industrial applications because it does not require wired infrastructure. Battery-powered wireless modules easily and inexpensively retrofit existing sensors and actuators ... | ANDRE CASTELO BRANCO SOARES |
in the 2.4 GHz band from a CTC's point of view and provides a set of new observations. • This paper introduces a novel LoRa to ZigBee CTC approach. By elaborately tuning the LoRa's packet payload, a ZigBee device is capable of decoding the information carried by the LoRa packet by purely sampling the RSS. • Our propose... | ANDRE CASTELO BRANCO SOARES |
a packet to access points, Device A may transmit the packet to Device B by using the main routing path or Device C through the backup route. From those devices, the packet may take several alternate routes to reach the access points. Graph routing is designed to enhance the network reliability through route diversity a... | ANDRE CASTELO BRANCO SOARES |
change from fmax to fmin) of data chirps represents different encoded data bits. The key LoRa physical-layer parameters, which are configurable by the user, include the frequency bandwidth ( BW ), central carrier frequency ( fc), spreading factor ( SF ), and coding rate ( CR). Table I lists the possible values for each... | ANDRE CASTELO BRANCO SOARES |
The wireless network has up to 4 hops when the testbed devices transmit at 0dBm. A Raspberry Pi Model B [11] integrated with a WiMOD iM282A LoRa (a) Boxplot of RSS measurements. (b) Example RSS signatures measured by two ZigBee devices located at different places when the LoRa device transmits a packet. Fig. 7. Detecta... | ANDRE CASTELO BRANCO SOARES |
the threshold ( LH ) can be used to encode information. B. Creation of RSS Signatures with Different LH As discussed in Section II-B, using different physical-layer parameters (i.e., SF , BW , CR, and PL ) can create the RSS signatures with different LH . Our goal is to maximize the number of distinguishable RSS signat... | ANDRE CASTELO BRANCO SOARES |
3.705 10, 11, 12 2 9 1.305 3100 4.405 13, 14, 15, 16 3 17 1.605 3400 5.005 17, 18, 19 4 23 1.805 3700 5.505 20, 21, 22 5 32 2.205 4000 6.205 23, 24, 25, 26 6 39 2.505 4300 6.805 27, 28, 29 7 47 2.805 4600 7.405 30, 31, 32 8 54 3.105 4900 8.005 33, 34, 35, 36 9 62 3.405 5200 8.605 37, 38, 39 10 69 3.705 5500 9.205 40, 4... | ANDRE CASTELO BRANCO SOARES |
shows, each RSS signature Fk =( k, P Lk,T ok ,T rk ,T tk ,L Hk ) {1 k 15} is denoted by an index k, a payload size PL k, a packet on-air time Tok , a software delay Trk , a total time Ttk , and a set of LHk . We can put multiple distinguishable RSS signatures in a single time slot to get a set of distinguishable RSS pa... | ANDRE CASTELO BRANCO SOARES |
count denotes the total number of distinguishable RSS patterns. By running Algorithm 1, we get 15, 81, 80, and 1 for count1, count2, count3, and count4, respectively. The total number of distinguishable RSS patterns ( count) is 15+81+80+1 = 177 . Algorithm 1: Algorithm to compute the number of distinguishable RSS patte... | ANDRE CASTELO BRANCO SOARES |
duplication at the same level. For instance, if there exist two distinguishable RSS patterns {F1,F 2,F 1} and {F2,F 1,F 1} in level 3 and we substitute F1 and F2 with the empty signatures. Then {F1X ,F 2X ,F 1} and {F2X ,F 1X ,F 1} are same. We use FkX to denote the empty signature, which locates at the kth TABLE III 3... | ANDRE CASTELO BRANCO SOARES |
= 454 . To maximize the throughput, the LoRa device can convert its binary data i(2) to 454-nary data i(454), while the ZigBee device can reverse the process to get the original binary data. V. E VA L U AT I O N In evaluation, we first run microbenchmark experiments to examine whether the ZigBee device can correctly ca... | ANDRE CASTELO BRANCO SOARES |
embedded device to reduce its power consumption by using a low-power ZigBee radio to detect nearby WiFi APs [13]. Hao et al. and Y u et al. used WiFi signals to achieve time synchronization among ZigBee devices [14], [15]. Gawlowicz et al. leveraged CTC to coordinate the coexistence between LTE-U and WiFi devices in th... | ANDRE CASTELO BRANCO SOARES |
been adopted by the leading industrial WSAN standards (WirelessHART and ISA100). The current approach to implementing industrial WSANs relies on a multi-hop mesh network to deliver sensing data and control commands. However, a large and complex mesh network is hard to manage and inelastic to change once the network is ... | ANDRE CASTELO BRANCO SOARES |
[14] T. Hao, R. Zhou, G. Xing, M. W. Mutka, and J. Chen, "WizSync: Exploiting Wi-Fi Infrastructure for Clock Synchronization in Wireless Sensor Networks," IEEE Transactions on Mobile Computing , vol. 13, no. 6, pp. 1379–1392, June 2014. [15] Z. Y u, C. Jiang, Y . He, X. Zheng, and X. Guo, "Crocs: Cross-Technology Clock... | ANDRE CASTELO BRANCO SOARES |
Q. Li, and O. Gnawali, "Interconnecting WiFi Devices with IEEE 802.15.4 Devices without Using a Gateway," in International Conference on Distributed Computing in Sensor Systems (DCOSS) , 2015. [31] Z. Chi, Y . Li, H. Sun, Y . Y ao, Z. Lu, and T. Zhu, "B2W2: N-Way Concurrent Communication for IoT Devices," in ACM Confer... | ANDRE CASTELO BRANCO SOARES |
Profs. André
Soares
Erico
LeãoUniversidadeFederal do PiauíCentro de Ciênciasda NaturezaDepartamentode Computaçãoandre.soare@ufpi.edu.br
Departamento deComputação
UniversidadeFederal do Piauí
Estruturade Dados ILista linear Encadeada
.: UNIVERSIDADE FEDERAL DO PIAUÍ :.
DEPARTAMENTO DE COMPUTAÇÃO
Estrutura
de Dados I
DC/... | ANDRE CASTELO BRANCO SOARES |
1 Prof. Erico Meneses LeãoUniversidadeFederal do PiauíCentro de Ciênciasda NaturezaDepartamentode Computaçãoericoleao@ufpi.edu.br Departamento deComputação UniversidadeFederal do Piauí Redesde ComputadoresCamadade Transporte .: UNIVERSIDADE FEDERAL DO PIAUÍ :. DEPARTAMENTO DE COMPUTAÇÃO 1 Redes de Computadores 2014 by ... | ANDRE CASTELO BRANCO SOARES |
fundamental do UDP e do TCP é ampliar o serviço de entrega IP entre dois sistemas finais para um serviço de entrega entre dois processos que rodam nos sistemas finais. ØA ampliação da entrega hospedeiro a hospedeiro para entrega processo a processo é denominada multiplexação/demultiplexaçãode camada de transporte.ØO UD... | ANDRE CASTELO BRANCO SOARES |
6428 SP: 6428DP: 5775SP: 5775DP: 6428 SP (source port) fornece "endereço de retorno" 64289157 5775 2020 11 Redes de Computadores 2014 by Pearson EducationErico Meneses Leão ØSocketTCP identificado pela quádrupla: oendereço IP origemonúmero da porta origemoendereço IP destinoonúmero da porta destinoØreceptor usa todos o... | ANDRE CASTELO BRANCO SOARES |
nenhum erro detectado. ØCaso contrário foi detectado um erro 29 Redes de Computadores 2014 by Pearson EducationErico Meneses Leão Soma de verificação UDP – na origem1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 01 1 0 1 0 1 0 1 0 1 0 1 0 1 0 111 0 1 1 1 0 1 1 1 0 1 1 1 0 1 1 1 0 1 1 1 0 1 1 1 0 1 1 1 0 1 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0... | ANDRE CASTELO BRANCO SOARES |
DadosØConstruindo um protocolo de transferência confiável de dados (rdt–ReliableData Transfer):odesenvolver incrementalmenteos lados transmissor e receptor de um protocolo confiável de transferência de dados (rdt);oconsiderar apenas fluxo unidirecional de dados;§mas informação de controle flui em ambos os sentidos!oUsa... | ANDRE CASTELO BRANCO SOARES |
o protocolo deve se recuperar de erros de ACK/NAK?oRemetente usa ACKs/NAKsp/ ACK/NAK do receptor. E se perder ACK/NAK do remetente?oNúmeros suficientes de bits de verificação para permitir detectar e se recuperar de erros. E se perder pacotes??oRetransmitir pacote ao receber ACK/NAK truncados. Entretanto, pode causar r... | ANDRE CASTELO BRANCO SOARES |
26 Redes de Computadores 2014 by Pearson EducationErico Meneses Leão rdt3.0: Canal com erros e perdasØrdt3.0 Transmissor: 5151 Redes de Computadores 2014 by Pearson EducationErico Meneses Leão rdt3.0: Canal com erros e perdasØOperação do rdt3.0: protocolo do bit alternante 52 52 27 Redes de Computadores 2014 by Pearson... | ANDRE CASTELO BRANCO SOARES |
retransmitir apenas os pacotes suspeitos de terem sido recebidos com erro no destinatário. ØEssa retransmissão individual, só quando necessária, exige que o destinatário reconheça individualmente os pacotes recebidos de modo correto.6464 33 Redes de Computadores 2014 by Pearson EducationErico Meneses Leão Repetição Sel... | ANDRE CASTELO BRANCO SOARES |
de Flag (6 bits): PSH e URG sãopoucousados!! PSH: dest. passardadospara aplicaçãoimediat. 73 Redes de Computadores 2014 by Pearson EducationErico Meneses Leão A Estrutura do Segmento TCPØPorta da fonte e do destino (16 bits cada)oMultiplexação/demultiplexaçãoØNum. de sequência (32 bits)oIdentificar segmentos duplicados... | ANDRE CASTELO BRANCO SOARES |
da conexão antiga.7979 Redes de Computadores 2014 by Pearson EducationErico Meneses Leão Leitura recomendadaØExemplo do Telnet:oNúmeros de sequências e números de reconhecimento. ØEstimativa do Tempo de viagem ida e volta (RTT) e o esgotamento de temporização:oJacobson, V. "CongestionAvoidanceandControl". Proceedingsof... | ANDRE CASTELO BRANCO SOARES |
88 Evento no Receptorchegada de segmento em ordemsem lacunas,anteriores já reconhecidoschegada de segmento em ordemsem lacunas,um ACK retardado pendentechegada de segmento fora de ordem, com n°de seq. maiorque esperado (lacuna)chegada de segmento que preenche a lacuna parcial oucompletamente Ação do Receptor TCPACK ret... | ANDRE CASTELO BRANCO SOARES |
um dos lados podeencerrar uma conexão.oOs recursos são liberados.oUtiliza um segmento especial com obit FIN ajustado para 1. 9595 Redes de Computadores 2014 by Pearson EducationErico Meneses Leão Gerenciamento da conexão TCPØEstados do TCP no lado cliente: 96 Aplicação cliente iniciauma Conexão TCPEnvia SYN Envia FINAp... | ANDRE CASTELO BRANCO SOARES |
mesma taxa de envio.oMúltiplos Roteadores com capacidade Rbytes/s.oO que acontece à medida queline l'increscem?? 104 104 53 Redes de Computadores 2014 by Pearson EducationErico Meneses Leão Mecanismos de Controle de CongestionamentoDuas abordagens gerais para controle de congestionamento:ØControle de congestionamento f... | ANDRE CASTELO BRANCO SOARES |
de Computadores 2014 by Pearson EducationErico Meneses Leão Controle de Congestionamento do TCPØQual algoritmo utilizar para modificar sua taxade envio como função do congestionamento percebido?oAlgoritmo de controle de congestionamento do TCP [RFC 5681]: oO algoritmo possui três componentes principais:§Partida Lenta (... | ANDRE CASTELO BRANCO SOARES |
Computadores 2014 by Pearson EducationErico Meneses Leão Controle de Congestionamento no TCP : retrospectivaØO Controle de congestionamento no TCP é quase sempre denominado aumento aditivo, diminuiçãomultiplicativa(AIMD —Additive-Increase, Multiplicative-Decrease):oDesconsiderando o período inicial, que começa com part... | ANDRE CASTELO BRANCO SOARES |
//Pilhas Dinâmicas
//Prof. Erico Leão
#include
#include
#include
// Sem necessidade de definir um tamanho máximo
//#define MAX 6
//Construção da Pilha Dinâmica
typedef struct PilhaD{
// A minha informação pode ser qualquer tipo
char info;
struct PilhaD *prox;
}PilhaD;
//Ponteiro para controlar o topo!!
PilhaD *topo;
Pi... | ANDRE CASTELO BRANCO SOARES |
História da Internet e Redes sob ameaça Professor: Erico Meneses Leão Disciplina: Redes de computadores Integrantes ● Aline Craviee Fonseca ● Francisco Caio Feitosa Silva ● João Victor Santos Andrade ● Matheus Vinicius Linhares Lemos De Oliveira ● Pedro Gonçalves Neto No começo de tudo... ● DARPA (Defense Advanced Rese... | ANDRE CASTELO BRANCO SOARES |
popularidade tenha caído muitos anos antes do seu encerramento. ● Um ano antes o ICQ foi criado, e em 1997 atingiu 1 milhão de usuários, se tornando o principal rival do AOL. ● Em 2001, o serviço já acumulava 100 milhões de usuários, e, em 2003, o ICQ se tornava uma das empresas mais bem-sucedidas da internet. ● Em 199... | ANDRE CASTELO BRANCO SOARES |
● R sendo muito grande, uma só fonte de ataque pode não ser capaz de gerar tráfego suficiente para prejudicar o servidor. ● Ataque DoS distribuído (DDoS - Distributed DoS) - Multiplas fontes que sobrecarregam o alvo. ● DDoS potencializam botnets. Algumas formas de se proteger dos DDoS ● Limpeza de rede ● Configuração d... | ANDRE CASTELO BRANCO SOARES |
Estruturas
de Dados I
DC/CCN/UFPIErico Leão e André Soares
Filas Dinâmicas
Estruturas
de Dados I
DC/CCN/UFPIErico Leão e André Soares32
Filas DinâmicasØAs filas também podem ser implementadas a partir de estruturas dinâmicas:oRepresentada por lista encadeada;oCada nó da Fila guarda uma referência para o próximo nó.oPre... | ANDRE CASTELO BRANCO SOARES |
1 Profs. Erico Leão e André SoaresUniversidadeFederal do PiauíCentro de Ciênciasda NaturezaDepartamentode Computaçãoericoleao@ufpi.edu.br Departamento deComputação UniversidadeFederal do Piauí Estruturasde Dados IRevisão de Ponteiros .: UNIVERSIDADE FEDERAL DO PIAUÍ :. DEPARTAMENTO DE COMPUTAÇÃO Estruturas de Dados I D... | ANDRE CASTELO BRANCO SOARES |
endereço do índice 0 do vetor;§*(ponteiro+indice1) = valor a ser gravado no índice 1;§...§*(ponteiro+indiceN) = valor a ser gravado no índice N.oVamos analisar prog5.c e prog6.c10 Estruturas de Dados I DC/CCN/UFPIErico Leão e André Soares11 Passagem de parâmetros para funçõesØVantagem da utilização de ponteiros:oOferec... | ANDRE CASTELO BRANCO SOARES |
// --- Bibliotecas
#include "DHT.h" //biblioteca do sensor de umidade e temperatura
#include //lib para conectar o wifi do ESP201
#include //lib para as funções addAP e run
#include //protocolo síncrono de dados serial
// --- Mapeamento de Hardware
#define pin_sct A0 //sensor de corrente
#define dht_pin 5 //pino d... | ANDRE CASTELO BRANCO SOARES |
1 Profs. Erico Leão e André SoaresUniversidadeFederal do PiauíCentro de Ciênciasda NaturezaDepartamentode Computaçãoericoleao@ufpi.edu.br Departamento deComputação UniversidadeFederal do Piauí Estruturasde Dados IIntrodução às Filas .: UNIVERSIDADE FEDERAL DO PIAUÍ :. DEPARTAMENTO DE COMPUTAÇÃO Estruturas de Dados I DC... | ANDRE CASTELO BRANCO SOARES |
representar uma Fila.oDinâmicas: Caracterizada por utilizar uma estrutura de dados dinâmica (lista) para representar uma Fila. ØImportante:oAs Filas têm as eliminações feitas no início e inserções feitas no final, o qual torna a implementação dinâmica mais simples com uma referência para o início e outra para o final. ... | ANDRE CASTELO BRANCO SOARES |
Wireless sensor networks: a survey I.F. Akyildiz, W. Su *, Y. Sankarasubramaniam, E. Cayirci Broadband and Wireless Networking Laboratory, School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA Received 12 December 2001; accepted 20 December 2001 Abstract This paper descr... | ANDRE CASTELO BRANCO SOARES |
cooperative effort of sensor nodes. Sensor nodes are fitted with an on-board processor. Instead of sending the raw data to the nodes responsible for the fusion, sensor nodes use their processing abilities to locally carry out simple computations and transmit only the required and partially processed data. The above des... | ANDRE CASTELO BRANCO SOARES |
inbuilt trade-off mechanisms that give the end user the option of prolonging network lifetime at the cost of lower throughput or higher transmission delay. Many researchers are currently engaged in developing schemes that fulfill these requirements. In this paper, we present a survey of protocols and algorithms propose... | ANDRE CASTELO BRANCO SOARES |
forces, equipment and ammunition: Leaders and commanders can constantly monitor the status of friendly troops, the condition and the availability of the equipment and the ammunition in a battlefield by the use of sensor networks. Every troop, vehicle, equipment and critical ammunition can be attached with small sensors... | ANDRE CASTELO BRANCO SOARES |
as solar cells, because the sensors may be left unattended for months and even years. The sensor nodes will collaborate with each other to perform distributed sensing and overcome obstacles, such as trees and rocks, that block wired sensors' line of sight. Biocomplexity mapping of the environment [11]: A biocomplexity ... | ANDRE CASTELO BRANCO SOARES |
a 396 I.F. Akyildiz et al. / Computer Networks 38 (2002) 393–422 greater freedom of movement and allow doctors to identify pre-defined symptoms earlier [56]. Also, they facilitate a higher quality of life for the subjects compared to the treatment centers [5]. A ''Health Smart Home'' is designed in the Faculty of Medic... | ANDRE CASTELO BRANCO SOARES |
robot control and guidance in automatic manufacturing environments; interactive toys; interactive museums; factory process control and automation; monitoring disaster area; smart structures with sensor nodes embedded inside; machine diagnosis; transportation; factory instrumentation; local control of actuators; detecti... | ANDRE CASTELO BRANCO SOARES |
Factors influencing sensor network design A sensor network design is influenced by many factors, which include fault tolerance ; scalability; production costs ; operating environment ; sensor network topology ; hardware constraints ; transmission media ; and power consumption . These factors are addressed by many resea... | ANDRE CASTELO BRANCO SOARES |
sensor nodes to few hundred sensor nodes in a region, which can be less than 10 m in diameter [14]. The density can be calculated according to [8] as lðRÞ¼ð N pR2Þ=A ð2Þ where N is the number of scattered sensor nodes in region A; and R, the radio transmission range. Basically, lðRÞ gives the number of nodes within the... | ANDRE CASTELO BRANCO SOARES |
3.4. Hardware constraints A sensor node is made up of four basic components as shown in Fig. 1: a sensing unit ,a processing unit ,a transceiver unit and a power unit . They may also have application dependent additional components such as a location finding system,a power generator and a mobilizer. Sensing units are u... | ANDRE CASTELO BRANCO SOARES |
for the techniques used for energy scavenging. The transceiver unit of sensor nodes may be a passive or active optical device as in smart dust motes [69] or a radio frequency (RF) device. RF communications require modulation, band pass, filtering, demodulation and multiplexing circuitry, which make them more complex an... | ANDRE CASTELO BRANCO SOARES |
393–422 make topology maintenance a challenging task. Hundreds to several thousands of nodes are deployed throughout the sensor field. They are deployed within tens of feet of each other [39]. The node densities may be as high as 20 nodes/m 3 [77]. Deploying high number of nodes densely requires careful handling of top... | ANDRE CASTELO BRANCO SOARES |
warehouse, • attached to animals, • attached to fast moving vehicles, and • in a drain or river moving with current. This list gives us an idea about under which conditions sensor nodes are expected to work. They work under high pressure in the bottom of an ocean, in harsh environments such as a debris or a battlefield... | ANDRE CASTELO BRANCO SOARES |
easier to build. Many of today's laptops, PDAs and mobile phones offer an infrared data association interface. The main drawback though, is the requirement of a line of sight between sender and receiver. This makes infrared a reluctant choice for transmission medium in the sensor network scenario. An interesting develo... | ANDRE CASTELO BRANCO SOARES |
the primary consideration, simply because power resources can be replaced by the user. The emphasis is more on QoS provisioning than the power efficiency. In sensor networks though, power efficiency is an important performance metric, directly influencing the network lifetime. Application specific protocols can be desi... | ANDRE CASTELO BRANCO SOARES |
PR values around 20 dbm and Pout close to 0 dbm [59]. Note that PicoRadio aims at a Pc value of /C020 dbm. I.F. Akyildiz et al. / Computer Networks 38 (2002) 393–422 403 The design of a small-sized, low-cost, ultralow power transceiver is discussed in [68]. A directconversion architecture is proposed for the transceive... | ANDRE CASTELO BRANCO SOARES |
performance requirements results in high subthreshold leakage currents. Coupled with the low duty cycle operation of the micro-processor in a sensor node, the associated power loss becomes significant [77]. It is to be noted that there may be some additional circuitry for data encoding and decoding. Application specifi... | ANDRE CASTELO BRANCO SOARES |
reserved for sensing. The mobility management plane detects and registers the movement of sensor nodes, so a route back to the user is always maintained, and the sensor nodes can keep track of who are their neighbor sensor nodes. By knowing who are the neighbor sensor nodes, the sensor nodes can balance their power and... | ANDRE CASTELO BRANCO SOARES |
and sensing. These motes may contain solar cells to collect energy during the day, and they require a line of sight to communicate optically with the base station transceiver or other motes. Comparing the smart dust communication architecture with the one in Fig. 2, the smart dust mote, i.e., the sensor node, typically... | ANDRE CASTELO BRANCO SOARES |
sensor networks by using SMP. Unlike many other networks, sensor networks consist of nodes that do not have global IDs, and they are usually infrastructureless. Therefore, SMP needs to access the nodes by using attribute-based naming and location-based addressing, which are explained in detail in Section 4.3. SMP is a ... | ANDRE CASTELO BRANCO SOARES |
of SQDDPs may be unique to each application. 4.1.4. Open research issues Although SQTL is proposed, there are still other application layer protocols need to be developed to provide a greater level of services. As mentioned before, the SMP allows software to perform administrative tasks such as moving sensor nodes and ... | ANDRE CASTELO BRANCO SOARES |
are scattered densely in a field either close to or inside the phenomenon as shown in Fig. 2. As discussed in Section 1, special multihop wireless routing protocols between the sensor nodes and the sink node are needed. The ad hoc routing techniques already proposed in the literature [65] do not usually fit the require... | ANDRE CASTELO BRANCO SOARES |
Note that the ME scheme selects the same route as the MH when the same amount of energy, i.e., all a are the same, is used on every link. Therefore, when nodes broadcast with same power level without any power control, MH is then equivalent to ME. • Maximum minimum PA node route : The route along which the minimum PA i... | ANDRE CASTELO BRANCO SOARES |
may be needed by certain applications. One other important function of the network layer is to provide internetworking with external networks such as other sensor networks, command and control systems and the Internet. In one scenario, the sink nodes can be used as a gateway to other networks. While another scenario is... | ANDRE CASTELO BRANCO SOARES |
r is k. The total power consumption between node u0 and uk is CðrÞ¼ Xk/C01 i¼0 ðpðui; uiþ1Þþ cÞð 5Þ where pðui; uiþ1Þ is the power required to transmit data between node ui, and uiþ1; and c, the power required to receive data. A path r is a ME path from u0 to uk if CðrÞ 6 Cðr0Þ for all paths r0 between node u0 and uk i... | ANDRE CASTELO BRANCO SOARES |
in their energy resources. SPIN has three types of messages, i.e., ADV, REQ, and DATA. Before sending a DATA 410 I.F. Akyildiz et al. / Computer Networks 38 (2002) 393–422 message, the sensor broadcasts an ADV message containing a descriptor, i.e., meta-data, of the DATA as shown in Step 1 of Fig. 6. If a neighbor is i... | ANDRE CASTELO BRANCO SOARES |
clustering-based protocol that minimizes energy dissipation in sensor networks [34]. The purpose of LEACH is to randomly select sensor nodes as cluster-heads, so the highenergy dissipation in communicating with the base station is spread to all sensor nodes in the sensor network. The operation of LEACH is separated int... | ANDRE CASTELO BRANCO SOARES |
in Fig. 7(c). The interest and data propagation and aggregation are determined locally. Also, the sink must refresh and reinforce the interest when it starts to receive data from the source. Note that the directed diffusion is based on data-centric routing where the sink broadcasts the interest. 4.3.1. Open research is... | ANDRE CASTELO BRANCO SOARES |
medium access is invariably inclined toward a dedicated resource assignment strategy. Such an access scheme is impractical for sensor networks as there is no central controlling agent like the base station. This makes network-wide synchronization a difficult proposition. Moreover, power efficiency directly influences n... | ANDRE CASTELO BRANCO SOARES |
/C240 dBm) and radio range of a sensor node is much less than those of the Bluetooth or the MANET. Topology changes are more frequent in a sensor network and can be attributed both to node mobility and failure. The mobility rate can also be expected to be much lower than in the MANET. In essence, the primary importance... | ANDRE CASTELO BRANCO SOARES |
can be expected to be much higher than the maximum data rate for sensor nodes. Such a scheme avoids the necessity for network-wide synchronization, although communicating neighbors in a subnet need to be time synchronized. Power conservation is achieved by using a random wake-up schedule during the connection phase and... | ANDRE CASTELO BRANCO SOARES |
failure penalty. Since dropping route-thru traffic is costlier, the associated penalty is lesser than that for originating data transmission failure. This ensures that route-thru traffic is preferred over the originating traffic. The computational nature of this scheme makes it more energy efficient than handshaking an... | ANDRE CASTELO BRANCO SOARES |
network specifics aims to illustrate the novel and important features in each of these schemes that enable their application in the sensor network domain. They present the deviations and differences from traditional MAC schemes, which by themselves would not be applicable. We also outline how each of these schemes achi... | ANDRE CASTELO BRANCO SOARES |
of the channel characteristics and implementation techniques. In the following subsection, we briefly review the motivation and basic design considerations for FEC, which in turn will help us understand the requirements for sensor networks. FEC: Link reliability is an important parameter in the design of any wireless n... | ANDRE CASTELO BRANCO SOARES |
sum of the encoding and decoding processing powers is less than the transmission power savings. It is to be noted that all these computations and comparisons must be carried out for a given, in most cases application specific, BER. Though adaptive FEC has received some attention in other wireless networks, it remains l... | ANDRE CASTELO BRANCO SOARES |
of our paper. In the following, we focus on signal propagation effects, power efficiency and modulation schemes for sensor networks. It is well known that long-distance wireless communication can be expensive, both in terms I.F. Akyildiz et al. / Computer Networks 38 (2002) 393–422 417 of energy and implementation comp... | ANDRE CASTELO BRANCO SOARES |
range from power efficient transceiver design to modulation schemes. A few of these are given below • Modulation schemes : Simple and low-power modulation schemes need to be developed for sensor networks. The modulation scheme can be either baseband, as in UWB, or passband. • Strategies to overcome signal propagation e... | ANDRE CASTELO BRANCO SOARES |
and Applications (ISCTA 2001), Ambleside, UK, July 2001. [9] B.G. Celler et al., An instrumentation system for the remote monitoring of changes in functional health status of the elderly, International Conference IEEE-EMBS, New York, 1994, pp. 908–909. Table 5 Current research projects Project name Research area HTTP l... | ANDRE CASTELO BRANCO SOARES |
On the analysis of UWB communication channels, IEEE MILCOM'99, 1999, pp. 1191–1195. [19] DSN Team, Multilateration Poster, SensIT Workshop, St. Petersburg, FL, April 2001. [20] J. Elson, D. Estrin, Random, ephemeral transaction identifiers in dynamic sensor networks, Proceedings 21st International Conference on Distrib... | ANDRE CASTELO BRANCO SOARES |
International Workshop on Data Engineering for Wireless and Mobile Access MobiDE 1999, Seattle, Washington, 1999, pp. 44–51. [39] C. Intanagonwiwat, R. Govindan, D. Estrin, Directed diffusion: a scalable and robust communication paradigm for sensor networks, Proceedings of the ACM MobiCom'00, Boston, MA, 2000, pp. 56–6... | ANDRE CASTELO BRANCO SOARES |
Iyengar, A new architecture for distributed sensor integration, Proceedings of IEEE Southeastcon'93, Charlotte, NC, April 1993. [56] Y.H. Nam et al., Development of remote diagnosis system integrating digital telemetry for medicine, International Conference IEEE-EMBS, Hong Kong, 1998, pp. 1170– 1173. [57] T. Nandagopal... | ANDRE CASTELO BRANCO SOARES |
Rodoplu, T.H. Meng, Minimum energy mobile wireless networks, IEEE Journal of Selected Areas in Communications 17 (8) (1999) 1333–1344. [74] A. Savvides, C. Han, M. Srivastava, Dynamic fine-grained localization in ad-hoc networks of sensors, Proceedings of ACM MobiCom'01, Rome, Italy, July 2001, pp. 166–179. [75] C. She... | ANDRE CASTELO BRANCO SOARES |
for media access in sensor networks, Proceedings of ACM MobiCom'01, Rome, Italy, July 2001, pp. 221–235. [94] S. Wu, C. Lin, Y. Tseng, J. Sheu, A new multi channel MAC protocol with on-demand channel assignment for multihop mobile ad hoc networks, International Symposium on Parallel Architectures, Algorithms, and Netwo... | ANDRE CASTELO BRANCO SOARES |
//aritmetica de ponteiros
#include
#include
int main(){
int *p;
int n;
printf("Digite o tamanho do valor de espaco: ");
scanf("%d", &n);
p = (int *) malloc (n*sizeof(int));
if (p == NULL) {
printf ("Socorro! malloc devolveu NULL!\n");
getchar();
exit(1);
p = 5;
(p+1) = 3;
//p[1] = 4;
printf("\nPonteiros: %p e %p", p, p... | ANDRE CASTELO BRANCO SOARES |
// programa 3 - ponteiros
#include
#include
int main(){
//Vamos analisar o uso de ponteiros para vetores sem o uso dos operadores
int v[2];
int *p; //ponteiro
p = v;
p[0]= 123;
p[1]= 456;
printf("v[0]: %d\n", v[0]);
printf("v[1]: %d", v[1]);
printf("\n\n");
return 0; | ANDRE CASTELO BRANCO SOARES |
Aplicações da Internet das Coisas Professor: Erico Meneses LeãoDisciplina: Redes de computadores Integrantes ● Antonio Lisbôa de Melo Neto ● Gabriel Dantas dos Santos ● Rafael Nogueira Leal Rebelo ● Samuel Santos Araujo Borges ● Anderson Araújo Guimarães O que é Internet das Coisas? O que caracteriza um objeto intelige... | ANDRE CASTELO BRANCO SOARES |
existentes atualmente; ● Prós: simplicidade, facilidade de adaptação, manutenção e custo; ● Contras: sem mobilidade. Wi-Fi ● Foi oficializado em 1997 pelo IEEE; ● Foi desenvolvido como uma alternativa ao padrão Ethernet; ● Prós: alcance de conexão e vazão; ● Contras: consumo de energia. ZigBee ● Principais característi... | ANDRE CASTELO BRANCO SOARES |
Estruturas
de Dados I
DC/CCN/UFPIErico Leão e André Soares
Aplicações de Pilhas
Estruturas
de Dados I
DC/CCN/UFPIErico Leão e André Soares
Verificação de ParêntesesØVerificar se uma expressão está ajustada:
Estruturas
de Dados I
DC/CCN/UFPIErico Leão e André Soares
Verificação de Parênteses
Estruturas
de Dados I
DC/CCN... | ANDRE CASTELO BRANCO SOARES |
| ESTE PROGRAMA MOSTRA AS OPERACOES BASICAS |
| SOBRE PILHA ESTATICA: |
| [INSERIR]: "PUSH" |
| [REMOVER]: "POP" |
Pressione ENTER para continuar...
| [PILHA INICIALIZADA] |
| [INSERIR "PUSH"] |
| | O elemento 'O' e inserido na pilha | |
Pressione ENTER para continuar...
| [INSERIR "PUSH"] |
| | O element... | ANDRE CASTELO BRANCO SOARES |
RELATORIO PARCIAL ESTÁGIO SUPERVISIONADO Estágio de setembro/2016 a janeiro/2017 Núcleo de Tecnologia da Informação UFPI Projeto: DataMining CGE Coordenador de estágio: Armando Soares Sousa Estagiário: Irvayne Matheus de Sousa Ibiapina 1. INTRODUÇÃO O estágio supervisionado é uma disciplina onde o aluno de Ciência da C... | ANDRE CASTELO BRANCO SOARES |
1 Profs. Erico Leão e André SoaresUniversidadeFederal do PiauíCentro de Ciênciasda NaturezaDepartamentode Computaçãoericoleao@ufpi.edu.br Departamento deComputação UniversidadeFederal do Piauí Estruturasde Dados ITipos Abstratos de Dados .: UNIVERSIDADE FEDERAL DO PIAUÍ :. DEPARTAMENTO DE COMPUTAÇÃO Estruturas de Dados... | ANDRE CASTELO BRANCO SOARES |
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