Um estudo sobre a aprendizagem de números irracionais no ensino médio

The present study describes theoretical practical relationships between development and application of activities in Mathematics education. It s proposed a methodological approach to Mathematics in the first grade of Ensino Médio, supported by an experiment involving Irrational Numbers education by using constructive activities, applied obeying an educational sequence. Constructivism is used as an important theoretical reference in teaching learning process of Mathematics. The methodological intervention was done with two classes of students of the first grade of Ensino Médio, in two public schools, a state one and a federal one, located on the city of Natal, Rio Grande do Norte. The development, application and testing of the activities used on this experiment led us to think more profoundly about the value of constructivism ideas and understand that the use of activities that obey an educational sequence favors the learning. It s also discussed the research results, commented on a way to contribute to the advances of the proposal and it s more constant use. The participation and testing of the students were analyzed and judged using Skemp s Instrumental Understanding and Relational Understanding concepts. The results of the research were considered good, so we believe this methodological intervention can be used more frequently in the classes of Ensino Médio and also be applied to teachers in courses of initial education and continuous formation

DERSU UZALA Hibridação Homem-Natureza

Esta disertación explora de qué forma las hibridaciones entre ser humano y ambientes naturales no urbanos contribuyen a configurar las estrategias de atención, de construcción de conocimiento y de interacción con el mundo del sujeto y cómo, recursivamente, las actitudes perceptivo-cognitivas y las maneras de acercarse a lo real, de imputar sentido a los fenómenos y de interactuar con el ambiente practicadas por el sujeto condicionan y contribuyen a definir las hibridaciones entre humanos y no humanos. Lo que guía esa exploración es el concepto de híbrido que, inspirándome en Bruno Latour (2008), concibo como una asociación entre elementos sin características inherentes, compenetrados, que se redefinen, recrean e reconfiguran recíprocamente. Utilizo como operadores cognitivos una narrativa literaria y una cinematográfica: el libro autobiográfico Dersu Uzala del escritor y explorador ruso Vladimir Klavdievich Arseniev (1872-1930), publicado por primera vez en 1923, y la película homónima del director japonés Akira Kurosawa (1910-1998), lanzada en 1975. Estas obras reconstruyen tres expediciones realizadas por Arseniev a principios del siglo XX en la región siberiana del Ussuri que tuvieron como guía al cazador nómada de etnia gold Dersu Uzala, con quien el escritor construyó una profunda amistad. La elección de hacer dialogar en el mismo plan a dos modos complementares de conocimiento, arte y ciencia, se fundamenta en la concepción de Edgar Morin (2003b) de la literatura y el cine como escuelas de vida y de complejidad humana y en la visión de Claude Lévi- Strauss (2007) del arte como modelo reducido que favorece una mirada más abarcadora sobre los fenómenos. Inicialmente, pongo en relación mi investigación con los trabajos de Silmara Lídia Marton (2008) y Samir Cristino de Souza (2009), que analizaron las estrategias de construcción de conocimiento y de interacción con el mundo de un habitante de la Laguna de Piató (Municipio de Assú, Estado de Rio Grande do Norte, Brasil), Francisco Lucas da Silva, y muestro algunas analogías entre estas y las de Dersu Uzala, ambas productos de determinadas hibridaciones con el ambiente. A continuación, exploro las implicaciones cognitivas de la amistad de Arseniev con el cazador gold, metáfora/encarnación del diálogo posible entre saberes de matrices diferentes. En un tercer momento, dialogando con pensadores que se interrogaron sobre el trinomio hombre-naturaleza-representaciones y con las narrativas de Arseniev (1997) y Kurosawa (1975), reflexiono sobre las ideas de híbrido, de humano y no humano, de vivo y no vivo, de proximidad y distancia del sujeto con respecto a otros sistemas de lectura del mundo, de relación directa y mediada con lo real, de ambientes naturales urbanos y no urbanos. A seguir, incursiono en el libro de Arseniev y en el largometraje de Kurosawa intentando identificar qué factores más contribuyeron para configurar las estrategias de conocimiento y de interacción con el ambiente manifestadas por el explorador y por el cazador gold y, recursivamente, de qué forma esas estrategias contribuyeron a definir sus hibridaciones con el ambiente siberiano. Por último, a partir de las reflexiones tejidas a lo largo del trabajo, me interrogo sobre lo que ellas pueden decirnos sobre nuestra forma de interactuar con la naturaleza no humana y sobre el diálogo entre distintas formas de percibir, conocer y relacionarse con el mundo

Apoio pedagógico, ação coletiva e diálogo: tramas da formação continuada em educação inclusiva

This work detaches the importance of the continued formation of the educators in terms of the inclusive educational process, pointing as basic elements the continued formation of the educational professionals. In this direction, it points and it defends the dialogue in the perspective of David Bohm, with interfaces of the freireanas ideas, as a methodological resource of action that allows the organization of strategies of collective and effective pedagogical support in inclusive schools, in the same time articulates the continued formation of the professionals in education. Characterized as research in a dialogical action with collective participation and collaboration, it counted with the participation of 87 educators, between professors, pedagogical, managing coordinators and specialists of special education in two schools of the state and municipal public system of Natal/RN. The results had pointed with respect to the viability of the dialogue as articulated methodological tool of the continued formation in service, when providing the establishment of personal and professional relationship between the educators, favoring the discursive enjoyment of the lived experiences, allows the organization of strategies of collective and effective pedagogical support in the scholar environment. On the basis of these results, this work also points to some items to reflections as the reorganization of the Secretariats and the schools, in the direction to brighten up the fragmentation and the discontinuity of the pedagogical actions evidenced and to instigate a process of changes that has glimpsed the professional development of the educators through its continued formation in service and the improvement of the school in the way of the concretization of an education directed toward the acceptance, respect and attendance the diversity of its pupils, as detaches the official documents and the studies on the inclusive education

Educar para o lar, educar para a vida :cultura escolar e modernidade educacional na Escola Doméstica de Natal (1914-1945)

La recherche propose un nouveau regard sur l Institution Scolaire École Doméstica de Natal, en essayant de tenir compte de la multiplicité des auteurs et des pratiques développées à l école qui définissaient le mieux et expliquaient les phénomènes de cette réalité éducative et des rapports avec le temps et le lieu où elle s insérait. Pour ce faire, les concepts de mémoire et culture scolaire ont été fondamentaux pour la compréhension de ces pratiques, parce qu ils ont contribué à notre lecture historique-culturelle de l ensemble d aspects institutionnalisés à l école, comme son curriculum, ses finalités, ses façons d enseigner et d apprendre, ses règles de conduite, ses normes, enfin, ce qui caractérisait son organisation et ses pratiques quotidiennes. C était l École Doméstica de Natal l institution pionnière dans le modèle d éducation féminine au Brésil, nous le reconnaissons en priorité et nous visons à le circonscrire à son indélébile contribution à l Histoire de l Éducation de Rio Grande do Norte. Conçue par un modèle d organisation scolaire européen pour l éducation féminine, l École Doméstica de Natal a été inaugurée en 1914, en ayant comme créateur l intelectuel de Rio Grande do Norte Henrique Castriciano de Souza. Sa singularité, s opposant aux écoles féminines existantes au Rio Grande do Norte et au Brésil en ce temps-là, était dû au modèle scolaire adopté, qui appuyait sur la formation d une femme préparée à répondre aux aspirations modernes surgissant avec l avènement de la République. Ce contexte exigeait de l école la formation d un modèle de femme dans les aspects moral, physique, culturel et intelectuel modelés sur les idéaux de l ordre et du progrès. Ce serait une nouvelle méthode d éducation scolaire qui pourrait favoriser la modernisation des anciennes méthodes d enseignement, provoquant le surgissement de modèles qui impliqueraient une nouvelle organisation pédagogique aux écoles de l`État et conduiraient la ville à de nouveaux et hauts paliers de culture et civilité. Avec cela, l école contribuerait à ce que la femme joue un rôle dans la société d une manière plus active, sociale et mieux adaptée. Les mots ordre, nouveau, civilité, moderne et progrès se répandaient et s entrecroisaient avec des valeurs archaïques toujours permanentes et enracinées dans la vision de vie et l idée de monde d alors. Ainsi, on voyait que l École Doméstica était une institution modèle, spécifique dans sa fonction, qui apporterait à la ville et, particulièrement au Rio Grande do Norte, des idées de civilité, ordre et progrès

A relação entre a família e a instituição de educação infantil: descrição reflexiva sobre uma experiência

The present paper is a doctorate thesis, in the area of Education, that has as a goal to describe and to reflect on the construction/systematization of a relation between family and institution of Childhood Education, in favor of sharing the care and education actions of children, in the context of creation of a County Center of Childhood Education, located in the city of Natal-RN. Our intension with this paper is to share some of the ideas and actions collectively constructed by this experience, with the intention of bringing a contribution for the thematic debates concerning Childhood Education - as modality of education, in a general way; and the relations between families and Institutions of Childhood Education, in a more specific way. The paper presented here is endorsed by the postulates of the qualitative research with characteristics of a research-action, having as main instruments of the data construction the open or half-structuralized interviews, the personal notebook of registers, the participant s index cards characterizing the children and comments. Authors as Aries (1981); Bassedas, Huguet and Solé (1999); Bhering and Blatchford (1999); Brasil (1998); Bujes (2001); Didonet (2002 - 2003); Formosinho (2007); Gómez (2000); Heywood (2004); Kramer (2005); Marchesi and Martín (2003); Marschal and Zohar (2006); Thiollent (2004); Tiriba (2006), amongst others, had theoretically based this paper. The experience described here points to the possibilities of sharing the care and education actions between family and Institution of Childhood Education, emphasizing the relevance of participative praxis in the interior of the institution, so that its job can propitiate this sharing with the families, throughout activities as meetings, lectures, workshops, participation in didactic projects, open expositions to the community, commemorative parties and valuation of the local culture, amongst other chances of dialogue and interaction between the educative institution and the families

Uma viagem aos saberes das formadoras de professores da Educação Infantil

This study aims to contribute with the professional development of the Trainers of childhood education teachers of the City Department of Education of Natal/RN, through a formation in context, trying to understand the teaching knowledge required in the practice of these professionals. The focus of the research is in teaching knowledge understood as the ideas, beliefs, conceptions, reasons, arguments, speeches that the trainers builds during his life (ALTET, 2001; PIMENTA, 2002; TARDIF, 2001; 2002). The study inserts itself in the qualitative approach of the educational research and the chosen methodology has characteristics of an inquiryaction. In the process, the following instruments had been used: questionnaires, press conferences, personal documents. The relevance of the present research is in achieving reflections concerning the role of the trainers of teachers, who needs to be seen as a mediator in the formation of teachers, in view of the fact that he interferes and is determinative in such a way in the formative process as in its results. The findings demonstrate that: a) the identity of the trainer is in a development process, what it is resembled to the effective situation of that, symbolically, the trainer exists, however, his attributions still are not enough clear; b) the teaching knowledge of the formation in the childhood education are related, among others points, primordially, to the function / role of the childhood education, child and teacher s point of view of this stage of the basic education; c) the Trainers teaching knowledge, concerning the teaching performance, ratifies the multiplicity of knowledge that the trainer must has, beyond the necessary complementarities and conciliation between the administrative and pedagogical aspects in the exercise of the function; d) the Trainers have knowledge that are according to the speech, consisting as declarative knowledge; e) there is a conflict between the teaching knowledge of the Trainers and the actions that are part of real life, generating contradictions between the formative saying and making

Atos, cenas e ações: encenações teatrais do multicampiartes no Pará

A pesquisa analisa o fazer teatral no âmbito do Programa Multicampiartes da Universidade Federal do Pará, principalmente com relação ao processo metodológico desenvolvido nas oficinas de teatro, nas cidades de Castanhal, Abaetetuba e Altamira. A análise tem como base os desdobramentos do fazer teatral como prática educativa e a articulação dos saberes dos artistas locais com os saberes dos professores do Programa. Acreditamos que essa articulação mediada pelo fazer teatral, contribui para a tomada de consciência de desejos, valores, inspirações permitindo a ampliação da sensibilidade e do juízo crítico do cidadão, tornando-o mais participativo e preparado para as escolhas no caminho da cidadania e da hominização. Fundamentamo-nos, especialmente, nas idéias de Paulo Freire (1987, 1981, 1996) e Augusto Boal (1991, 2003) por evidenciarmos e defendermos um fazer teatral implicado com as questões vivenciadas pelos homens no seu lócus de ação. Essa fundamentação pressupõe que a linguagem teatral é comprometida com a realidade sóciocultural, podendo atuar sobre ela e transformá-la. Metodologicamente, optamos pela análise das impressões e avaliação dos participantes através de depoimentos sobre a metodologia desenvolvida nas oficinas teatrais e suas implicações sócio-educativas nas comunidades. Os resultados apontam para uma diversidade de caminhos, dos quais destacamos: (a) a importância da presença da Universidade nas cidades como forma de reconhecimento do potencial artístico dos artistas locais; (b) as implicações na metodologia de trabalho organizada pelos professores do programa, cuja característica principal foi a flexibilidade e a disponibilidade para o inesperado que permitia maior vinculação com a comunidade local e maior envolvimento na formação no âmbito do Programa Multicampiartes. Apontamos, finalmente, a necessidade de organização de programas e ações que avancem no sentido da formação do cidadão, fora os muros da universidade e no cumprimento do seu papel, responsabilidade e compromisso social

A dimensão social do desenho: um estudo sobre as interações no processo de (re) construção imagética da criança no Ensino Fundamental

In the historical-cultural perspective, the drawing is processed by means of a shared and complex way, under diverse relations with the other and with the immersed signs of the culture. That is, something constituted by the social interactions and that can modify the structure of the psychological functions, therefore as socialized sign, propitiates the incorporation of the functions socially. In this way, the figuration carrier sensitive and established meanings historically disclosing the shared experiences and the ways of the subject to think and perceive the world. Such reflections gave shape to the main problem of this research: how to think over about the drawing at the school to incide in the reconstruction of the childs imaginative language? Under such perspective, this work deals with the interactions in the production process of the drawing of the children in a context of teach-Iearning of the elementary school having as goal to analyze the interactions established in the cIassroom in the process of production of the drawings; to propose situations of learnings that favor the advance graphical expression of the students; and to identify in the interactive games some relations between body expression and drawing. For its accomplishment, it was opted for the construction process based in the collaborative investigation by the fact to propitiate negotiations, sharing and confrontation of ideas, becoming possible a joint construction of the knowledge. For this research, the researcher and the collaborating teacher, as well as the involved children, become themselves into co-authors of the context studied. As locus of the research, it was chosen a first cycle class, with 30 students, from Municipal School Profª. Emília Ramos (Natal/RN - Brazil), whose election took in account the fact of this school to constitute in a promotional space of reflections and professional development of teachers in service and, at the same time, for presentinglimitations theoretic- methodological in the field of teaching for Arts. In the process of the research, it was perceived that the children with the support of the verbal language formulates meanings on the seen and imagined object, printing lines and forms that if overlap to the physiological aspects of the visual perception. That is, the drawing discloses a reality appraised, enriched for the picked up vision of the image, but the meanings established for the author, or observer who becomes it perceivable and identified. In the systemizing situations, it was observed that the teaching-Iearning process of the drawing, implies a co-construction between teachers and learners. And, moreover, the necessity to interlace emotion and cognition by means of plastic-corporal interactions that foment drawing experiences, whose process concurs for the imagenative reconstruct of the apprentices

Vivências de familiares do paciente internado em unidade de terapia intensiva: estudo fenomenológico

This study originated from my concerns as critical care nurse, regarding the lived experience of the family member of the patient that is hospitalized in the intensive care unit - ICU. The purpose of the study was to comprehend the experience of the family members while having a loved one interned in an ICU, and to identify the common elements of the phenomenon, based on the descriptions of their experiences. Considering that the object of study involves subjective and social questions, the study was conducted using some fundamental ideas of descriptive phenomenology as a referential and the situated phenomenon as suggested by Martins and Bicudo (1989). Ten (10) family members of patients that were interned in the ICU of private hospital in Natal, RN were interviewed using the following leading question: What is it like to have a member of your family interned in the ICU? Five thematic structural categories emerged from the comprehensive analysis of the interviews: Fear of the family member s death; Lack of humanization; Social isolation; Confidence in the ICU; and Overload to the personal life. The description of the phenomenon enabled a new look at how the care team relates to the family members of the patients interned in the ICU, providing some guidance on how to construct a humanized care that involves the family and that is based on affective human relations. This involves a rethinking of the care provided by team to the family and stimulates the reformulation of personal and social attitudes, and of hospital organizational norms

O processo de cuidar do enfermeiro em unidade de terapia intensiva: uma análise dos conhecimentos utilizados

Care has always been present in the history of humanity and in contemporary nursing it is considered to be a fundamental characteristic. In the Intensive Care Unit (ICU), care occurs within an environment that is known for its stressful factors, technological equipment, social isolation and discomfort. Whilst the reality of nursing practice in ICU demonstrates the lack of planned and systematized care, there is an indication that the professionals working in this setting utilize some type of knowledge. Based on that premise, in this study we aim to identify the knowledge that the nurses use in providing care in the ICU. We believe that the identification and characterization of this knowledge, and how it presents itself in practice, requires a reflective analysis process. Therefore, we utilized a qualitative perspective and Kim´s (1999) investigative methodology of reflective inquiry that is based on the precepts of Action Science proposed by Argyris et al. (1985). The study was conducted with 8 intensive care nurses of a public hospital. Data were collected by means of non-participative observation of the nursing care actions and a semi-structured interview conducted within the reflective mode that focused on the nurses practice in the ICU. The results enabled us no only to detect that the nurses utilized knowledge and patterns of knowledge acquired or constructed, but to identify them as: scientific, philosophic, religious, empirical, personal, ethical, and esthetic knowledge. The predominance of the scientific knowledge in the care process suggests that these nurses hold an acquired scientific substance that they utilize to provide specialized care directed toward critical treatment. The conception of this reality surpasses the theoretical limits, the techniques, and the known facts, and denotes the need for a reflective process in action to aide in the comprehension of the knowledge involved in the construction of excellent care

Conhecimento dos adolescentes sobre métodos contraceptivos: pesquisa-ação em uma unidade do programa saúde da família de Natal

It is a descriptive study with a qualitative approach, and an action-research type, which aimed to analyze the changes of knowledge about contraceptive methods invested to a teenager group attended in Igapó Family Healthcare Unit, in the city of Natal/RN, after consent and institutional assent of Ethics Committee of Rio Grande do Norte Federal University (Protocol No. 131/07). It were researched 16 teenagers of both sexes, with age ranging from 11 to 16 years. We used two structured questionnaires, one in the initial diagnosis and another during the seven meetings of the focus group, in addition to the field notes and the meetings discussions transcriptions. The data-collection was performed in the period of two months by a team composed by a nurse the research coordinator, a dentist, a nursing assistant, a community-based healthcare worker and a nursing academic. The quantitative and qualitative data were organized, tagged and categorized into spreadsheet in Microsoft Excel, being held a thematic analysis of speeches performed by the study participants. The results were presented as tables, graphics, photos, drawings and word clippings. The educational strategy developed in focus group allowed adolescents to discuss, exchange ideas and opinions on several contraceptive methods, providing expansion in knowledge of all contraceptives discussed, especially those natural and surgical, which were less mentioned at the beginning of the study. Among the advantages of the contraceptive methods listed by teenagers, was highlighted avoiding pregnancy and STDs in use of the barrier method of condom. As for the disadvantages more frequently noted by the survey with the misuse of barrier methods, was highlighted get pregnant, acquire STD's and do not prevent STD's in hormonal, natural and surgical methods. Adolescents showed consistency between the advantages and disadvantages and types of contraceptive methods, showing a widening in knowledge among them. It may be said that, in general, those surveyed had a good understanding about the use of the various contraceptive methods. Thus, the study participants had positively evaluated all the criteria used to qualify the meetings in the focus group. The action strategy of the focus group should be encouraged by professionals who work with teenagers, since they prefer to live in groups, one characteristic of adolescence.

A aprendizagem na convivência:o estágio curricular em enfermagem

This is an analytic research of a qualitative nature whose purpose is to examine the learning process involving students of the Nursing Program of the Universidade Federal do Rio Grande do Norte UFRN who are attending the Supervised Clerkship in Nursing (SCN) in Family Health Strategy (FHS), based on learning through daily living. In order to do this, a historical overview of this academic activity in the teaching of nursing was presented, and the importance of FHS as the scene where professional health education takes place was discussed. For the empirical investigation, ten eighth-semester students involved in clerkship activities at family health units in the Western Sanitary District of Natal, Rio Grande do Norte, were interviewed. The theoretical approach relied, as epistemological presupposition, on the ideas of educator Humberto Maturana who showed that learning, both in nature and among human beings, takes place within dialogic living relationships wherein acceptance of the other, affectivity (love) and dialoguing are essential stimuli to learning. Students discourses gradually became part of the analytic categories that had been established beforehand. There has been verified that the students went through meaningful learning encouraged by all who shared the living environment, that is: nurse/instructor, teacher/supervisor, family health staff, and the community. Several feelings were involved in the process, such as joy, satisfaction, self-reliance, affectivity and, in the opposite direction, sadness, indignation, a feeling of impotence, and fear. The learning of interpersonal relationship was describe as the most relevant of the academic experiences and, therefore, thus emphasizing the relevance of affectivity to the learning process as Maturana points out. It is suggested that the teaching of nursing keep on giving priority to family health units as the Basic Care educational scene, with attention to the importance of placing the students in welcoming environments, in such a way as to encourage learning

Gestão ambiental na indústria do petróleo :um estudo sobre as práticas de gestão na perspectiva da aprendizagem organizacional

This work discusses the environmental management thematic, on the basis of ISO 14001 standard and learning organization. This study is carried through an exploratory survey in a company of fuel transport, located in Natal/RN. The objective of this research was to investigate the practices of environmental management, carried through in the context of an implemented ISO 14001 environmental management system, in the researched organization, from the perspective of the learning organization. The methodology used in this work is supported in the quantitative method, combining the exploratory and descriptive types, and uses the technique of questionnaires, having as scope of the research, the managers, employee controlling, coordinators, supervisors and - proper and contracted - of the company. To carry through the analysis of the data of this research, it was used software Excel and Statistical version 6.0. The analysis of the data is divided in two parts: descriptive analysis and analysis of groupings (clusters). The results point, on the basis of the studied theory, as well as in the results of the research, that the implemented ISO 14001 environmental system in the searched organization presents elements that promote learning organization. From the results, it can be concluded that the company uses external information in the decision taking on environmental problems; that the employees are mobilized to generate ideas and to collect n environmental information and that the company has carried through partnerships in the activities of the environmental area with other companies. All these item cited can contribute for the generation of knowledge of the organization. It can also be concluded that the company has evaluated environmental errors occurrences in the past, as well as carried through environmental benchmarking. These practical can be considered as good ways of the company to acquire knowledge. The results also show that the employees have not found difficulties in the accomplishment of the tasks when the manager of its sector is not present. This result can demonstrate that the company has a good diffusion of knowledge

Segurança da informação no correio eletrônico com base na ISO/IEC 17799 :um estudo de caso em uma instituição superior com foco no treinamento

The electronic mail service is one of the most Internet services that grow in the corporate environment. This evolution is bringing several problems for the organizations, especially to information that circulates inside of the corporate net. The lack of correct orientation to the people, about the usage and the security importance of these resources, is leaving breaches and causing misusage and overuse of service, for example. In recent literature, it starts to coming out several ideas, which has helped to rganizations how to plain and how to implement the information security system to the electronic mail in computer environment. However, these ideas are still not placed in practice in many companies, public or private. This dissertation tries to demonstrate the results of a research that has like goal, identify the importance that user training has over the information security policy, through a case study inside of private superior education institute in this state. Besides, this work had by basic orientation the ISO/IEC 17799, which talk about People Security. This study was developed over a proposed model to this research, which looked for offer conditions to guide the institution studied, how to plan better a information security policy to the electronic mail. Also, this research has an exploratory and descreptive nature and your type, qualitative. Firstly, it was applied na questionary to the information technology manager, as better way to get some general data and to deepen the contact which still then, it was being kept through e-mail. Thereupon this first contact, eleven interviews were done with the same manager, beside one interview with twenty-four users, among employees e students. After that to collect and transcript the interviews, were review with the manager all informations given, to correct any mistakes and to update that informations, to then, start the data analyze. The research suggests that the institution has a pro attitude about the information security policy and the electronic mail usage. However, it was clear that answers have their perception about information security under a very inexperient way, derived of a planning lack in relation to training program capable to solve the problem

Uma fundamentação para sinais e sistemas intervalares

In this work we use Interval Mathematics to establish interval counterparts for the main tools used in digital signal processing. More specifically, the approach developed here is oriented to signals, systems, sampling, quantization, coding and Fourier transforms. A detailed study for some interval arithmetics which handle with complex numbers is provided; they are: complex interval arithmetic (or rectangular), circular complex arithmetic, and interval arithmetic for polar sectors. This lead us to investigate some properties that are relevant for the development of a theory of interval digital signal processing. It is shown that the sets IR and R(C) endowed with any correct arithmetic is not an algebraic field, meaning that those sets do not behave like real and complex numbers. An alternative to the notion of interval complex width is also provided and the Kulisch- Miranker order is used in order to write complex numbers in the interval form enabling operations on endpoints. The use of interval signals and systems is possible thanks to the representation of complex values into floating point systems. That is, if a number x 2 R is not representable in a floating point system F then it is mapped to an interval [x;x], such that x is the largest number in F which is smaller than x and x is the smallest one in F which is greater than x. This interval representation is the starting point for definitions like interval signals and systems which take real or complex values. It provides the extension for notions like: causality, stability, time invariance, homogeneity, additivity and linearity to interval systems. The process of quantization is extended to its interval counterpart. Thereafter the interval versions for: quantization levels, quantization error and encoded signal are provided. It is shown that the interval levels of quantization represent complex quantization levels and the classical quantization error ranges over the interval quantization error. An estimation for the interval quantization error and an interval version for Z-transform (and hence Fourier transform) is provided. Finally, the results of an Matlab implementation is given