Abstrakt Jag har gjort en fallstudie där jag har sammanställt och analyserat fyra olika texter som är skrivna av en nordsamisk arvspråksskribent som har nordsamiska som ett av sina andraspråk och svenska som modersmål. I studien har jag tittat på språkliga svårigheter i skrivandet, utmaningar kopplade till specifik texttyp och på vilket sätt de språkliga utmaningarna har hanterats av skribenten efter att läraren har lämnat kommentarer på texten. Studien visar att skribenten haft vissa grammatiska svårigheter och att vissa morfologiska delar har varit speciellt problematiska. Man ser också att problem på sats- och meningsnivå ökar i och med att textens komplexitet ökar. Studien visar att hjälp och vägledning från läraren hjälper skribenten att implementera strategier för att kunna rätta till de fel som finns i texten. Dock blir även denna korrigering svårare att utföra i takt med att meningarnas struktur och komplexitet ökar. / Abstrákta Mun lean dahkan dáhpáhusdutkamuša mas lean buohtastahttán ja gielalaččat guorahallan njeallje teavstta maid lea čállán okta árbegielatčálli. Čálli leat davvisámegiella nubbegielas ja ruoŧagiella eatnigielas. Teavsttain mun lean guorahallan čállimii gullevaš gielalaš hástalusaid, čállinhástalusaid teakstatiippaid ektui ja dan mo čálli lea čoavdán daid hástalusaid mat teavsttaid álgoveršuvnnain leat ja dan mielde makkár bagadusa čálli lea ožžon oahpaheaddjis. Dutkamuš lea čájehan ahte čállis leat moadde giellaoahpalaš čuolmmat ja ahte moadde morfologalaš oasit leat leamaš erenoamážit čuolbmái. Go kompleksiteahtta teavsttain lasiha ja gihput ja cealkagat šaddet guhkit ja viiddit de maiddái dagahit eanet hástalusaid čállái. Veahki ja bagadus oahpaheaddjis sáhttá veahkit čálli implementeret strategiijaid ja njulget čuolmma teavsttas. Maiddái dát njulget šaddá eanet váttis čállis go cealkagat struktuvrra ja kompleksitehta lasiha.

Mun lean dahkan dáhpáhusdutkamuša mas lean buohtastahttán ja gielalaččat guorahallan njeallje teavstta maid lea čállán okta árbegielatčálli. Teavsttaid čállis lea davvisámegiella nubbingiellan ja ruoŧagiella eatnigiellan. Teavsttain mun lean guorahallan čállimii gullevaš gielalaš hástalusaid, čállinhástalusaid teakstatiippaid ektui ja dan mo čálli lea čoavdán daid hástalusaid mat teavsttaid álgoveršuvnnain leat ja dan mielde makkár bagadusa čálli lea ožžon oahpaheaddjis. Dutkamuš lea čájehan ahte čállis leat moadde giellaoahpalaš čuolmma ja ahte muhtin morfologalaš oasit leat leamaš erenoamážit hástaleaddjit. Go kompleksiteahtta teavsttain lassána ja gihput ja cealkagat šaddet guhkibun ja viiddibun de dat maiddái dagahit eanet hástalusaid čállái. Veahkki ja bagadus oahpaheaddjis sáhttá láidet čálli implementeret strategiijaid ja njulget čuolmma teavsttas. Maiddái cealkagiid divvun ja njulgen šaddá váddáset go cealkagiid struktuvra ja kompleksiteahtta lassána. / Jag har gjort en fallstudie där jag har sammanställt och analyserat fyra olika texter som är skrivna av en nordsamisk arvspråksskribent som har nordsamiska som ett av sina andraspråk och svenska som modersmål. I studien har jag tittat på språkliga svårigheter i skrivandet, utmaningar kopplade till specifika texttyper och på vilket sätt de språkliga utmaningarna har hanterats av skribenten efter att läraren har lämnat kommentarer på texten. Studien visar att skribenten har haft vissa grammatiska svårigheter och att vissa morfologiska egenskaper och strukturer har varit speciellt problematiska. Man ser också att problem på sats- och meningsnivå ökar i och med att textens komplexitet ökar. Studien visar att hjälp och vägledning från läraren hjälper skribenten att implementera strategier för att kunna rätta till de fel som finns i texten. Dock blir även denna korrigering svårare att utföra i takt med att meningarnas struktur och komplexitet ökar.

The recent emergence and rapid advancement of Cloud Computing (CC) infrastructure and services have made outsourcing Information Technology (IT) and digital services to Cloud Providers (CPs) attractive. Cloud offerings enable reduction in IT resources (hardware, software, services, support, and staffing), and provide flexibility and agility in resource allocation, data and resource delivery, fault-tolerance, and scalability. However, the current standards and guidelines adopted by many CPs are tailored to address functionality (such as availability, speed, and utilization) and design requirements (such as integration), rather than protection against cyber-attacks and associated security issues. In order to achieve sustainable trust for cloud services with minimal risks and impact on cloud customers, appropriate cloud information security models are required. The research described in this dissertation details the processes adopted for the development and implementation of an integrated information security cloud based approach to cloud service models. This involves detailed investigation into the inherent information security deficiencies identified in the existing cloud service models, service agreements, and compliance issues. The research conducted was a multidisciplinary in nature, with detailed investigations on factors such as people, technology, security, privacy, and compliance involved in cloud risk assessment to ensure all aspects are addressed in holistic and well-structured models. The primary research objectives for this dissertation are investigated through a series of scientific papers centered on these key research disciplines. The assessment of information security, privacy, and compliance implementations in a cloud environment is described in Chapters two, three, four, and five. Paper 1 (CCIPS: A Cooperative Intrusion Detection and Prevention Framework for Cloud Services) outlines a framework for detecting and preventing known and zero-day threats targeting cloud computing networks. This framework forms the basis for implementing enhanced threat detection and prevention via behavioral and anomaly data analysis. Paper 2 (A Trusted CCIPS Framework) extends the work of cooperative intrusion detection and prevention to enable trusted delivery of cloud services. The trusted CCIPS model details and justifies the multi-layer approach to enhance the performance and efficiency of detecting and preventing cloud threats. Paper 3 (SOCaaS: Security Operations Center as a Service for Cloud Computing Environments) describes the need for a trusted third party to perform real-time monitoring of cloud services to ensure compliance with security requirements by suggesting a security operations center system architecture. Paper 4 (SecSLA: A Proactive and Secure Service Level Agreement Framework for Cloud Services) identifies the necessary cloud security and privacy controls that need to be addressed in the contractual agreements, i.e. service level agreements (SLAs), between CPs and their customers. Papers five, six, seven, and eight (Chapters 6 – 9) focus on addressing and reducing the risk issues resulting from poor assessment to the adoption of cloud services and the factors that influence such as migration. The investigation of cloud-specific information security risk management and migration readiness frameworks, detailed in Paper 5 (An Effective Risk Management Framework for Cloud Computing Services) and Paper 6 (Information Security, Privacy, and Compliance Readiness Model) was achieved through extensive consideration of all possible factors obtained from different studies. An analysis of the results indicates that several key factors, including risk tolerance, can significantly influence the migration decision to cloud technology. An additional issue found during this research in assessing the readiness of an organization to move to the cloud is the necessity to ensure that the cloud service provider is actually with information security, privacy, and compliance (ISPC) requirements. This investigation is extended in Paper 7 (A Practical Life Cycle Approach for Cloud based Information Security) to include the six phases of creating proactive cloud information security systems beginning with initial design, through the development, implementation, operations and maintenance. The inherent difficulty in identifying ISPC compliant cloud technology is resolved by employing a tracking method, namely the eligibility and verification system presented in Paper 8 (Cloud Services Information Security and Privacy Eligibility and Verification System). Finally, Paper 9 (A Case Study of Migration to a Compliant Cloud Technology) describes the actual implementation of the proposed frameworks and models to help the decision making process faced by the Saudi financial agency in migrating their IT services to the cloud. Together these models and frameworks suggest that the threats and risks associated with cloud services are continuously changing and more importantly, increasing in complexity and sophistication. They contribute to making stronger cloud based information security, privacy, and compliance technological frameworks. The outcomes obtained significantly contribute to best practices in ensuring information security controls are addressed, monitoring, enforced, and compliant with relevant regulations. / Graduate / 0984 / 0790 / fahd333@gmail.com

As more second-language acquisition research is published about the optimal age to begin foreign language instruction, and the best methods for teaching foreign languages, many colleges and universities are seeking to create intensive immersion programs which would prepare prospective students for the rigors of their language programs and serve as a productive language-learning environment. One such program, the Middlebury-Monterey Language Academy, is based on the highly successful summer language schools model. This research isolates the components which would help create successful, intensive Arabic immersion programs. Specifically, this thesis asks: How can an institution create a successful Arabic immersion learning environment for high school students? To answer this question, this thesis reviews current literature in the field of Second Language Acquisition (SLA), includes personal observations about the program and analyzes responses to surveys administered to two groups of stakeholders, namely students, and teachers/resident assistants. After the descriptive section, the thesis proposes a curricular framework which encompasses the main components of the curriculum (including goals, teacher and learner training, instructional materials, and native versus target language use). This framework is presented as a model to help teachers and other administrators as they try to set up new Arabic programs for high school students. / text

The research initiatives addressed in this thesis are geared towards improving the performance of passive optical networks (PONs) through the development of advanced dynamic bandwidth allocation (DBA) protocols. In particular, the aim of the research undertaken is to enhance the quality of service (QoS) offered by standard PONs by means of providing subscribers with service level agreement (SLA) to fulfil applications and associated bandwidth requirements on demand. To accomplish the research objectives, a novel service and bandwidth focused DBA protocol is developed for standard time division multiplexing (TDM), gigabit-capable PONs (GPONs) by flexibly assigning a guaranteed minimum bandwidth to each optical network unit (ONU),terminated at subscribers premises. Modelling and simulation of the developed algorithms have displayed a tenfold enhancement in network performance, showing a superior performance to other published DBA protocols, in terms of mean packet delay. To accomplish protocol optimisation, the ONU upstream transmission properties of TDM-PONs have been further analysed and subsequently the ONU data transfer order in each communication cycle has been dynamically configured to increase the network upstream throughput by overlapping the upstream transmission period with parts of the bandwidth request-allocation process between OLT and ONUs. In addition, with the objective of extending the application of the developed protocol to long-reach PONs by means of reducing the augmented propagation delays due to the network’s extensive reach, the concept of virtual communication cycles has been incorporated into the optimised DBA algorithm. This approach demonstrates comparable transmission efficiency in the context of subscriber throughput and packet delay as in a standard PON but at much longer distances from the network exchange. To overcome the inevitably limited communication capacity of single wavelength TDM protocols and with the transportation of the ever increasing, time-sensitive, multi-media services in mind, a novel multi-wavelength DBA protocol is then developed to be applied to a wavelength division multiplexing–PON. With this protocol, both the downstream and upstream network capacity is dynamically adjusted according to subscribers’ service level and bandwidth demand in each polling cycle as opposed to a fixed upstream network capacity in TDM-PONs. It therefore also demonstrates improved upstream transmission efficiency.

Les gènes TDP-43 (TAR DNA Binding Protein 43) et FUS/TLS (Fused in Sarcoma/Translocated in Liposarcoma) sont actuellement à l’étude quant à leurs rôles biologiques dans le développement de diverses neuropathies telles que la Sclérose Latérale Amyotrophique (SLA). Étant donné que TDP-43 et FUS sont conservés au cours de l’évolution, nous avons utilisé l’organisme modèle C. elegans afin d’étudier leurs fonctions biologiques. Dans ce mémoire, nous démontrons que TDP-1 fonctionne dans la voie de signalisation Insuline/IGF pour réguler la longévité et la réponse au stress oxydatif. Nous avons développé des lignées C. elegans transgéniques mutantes TDP-43 et FUS qui présentent certains aspects de la SLA tels que la dégénérescence des motoneurones et la paralysie adulte. La protéotoxicité causée par ces mutations de TDP- 43 et FUS associées à la SLA, induit l’expression de TDP-1. À l’inverse, la délétion de tdp-1 endogène protège contre la protéotoxicité des mutants TDP-43 et FUS chez C. elegans. Ces résultats suggèrent qu’une induction chronique de TDP-1/TDP-43 sauvage propagerait la protéotoxicité liée à la protéine mutante. Nous avons aussi entrepris un criblage moléculaire pilote afin d’isoler des suppresseurs de toxicité neuronale des modèles transgéniques mutants TDP-43 et FUS. Nous avons ainsi identifié le bleu de méthylène et le salubrinal comme suppresseurs potentiels de toxicité liée à TDP-43 et FUS via réduction de la réponse au stress du réticulum endoplasmique (RE). Nos résultats indiquent que l’homéostasie de repliement des protéines dans le RE représente une cible pour le développement de thérapies pour les maladies neurodégénératives. / Two recently discovered causative genes for ALS, TDP-43 (TAR DNA Binding Protein 43) and FUS/TLS (Fused in Sarcoma/Translocated in Liposarcoma) are under further investigation regarding their biological roles in neuropathies such as Amyotrophic Lateral Sclerosis (ALS). Since TDP-43 and FUS are evolutionarily conserved we turned to the model organism C. elegans to learn more about their biological functions. Here we report that TDP-1 functions in the Insulin/IGF pathway to regulate longevity and the oxidative stress response. We have generated mutant TDP-43 and FUS transgenic lines in C. elegans that recapitulate certain aspects of ALS including motor neuron degeneration and adult-onset paralysis. Proteotoxicity caused by ALS- associated mutations in TDP-43 or FUS also induce TDP-1 expression and consistently, deletion of endogenous tdp-1 rescues mutant TDP-43 and FUS proteotoxicity in C. elegans. These results suggest that chronic induction of wild type TDP-1/TDP-43 by proteotoxicity may actively promote neurodegeneration. We also screened for small- molecule suppressors of mutant TDP-43 and FUS neuronal toxicity in transgenic C. elegans and identified methylene blue and salubrinal as potent suppressors of TDP-43 and FUS toxicity in our models through induction of the endoplasmic reticulum (ER) stress response. Our results indicate that protein folding homeostasis in the ER may be an important target for therapeutic development in neurodegenerative diseases.

Les sélénoprotéines sont des protéines auxquelles des sélénocystéines, soit le 21e acide aminé, sont incorporées durant leur traduction. Plus précisément, la sélénocystéine (Sec) est un dérivé métabolique de la sérine, mais structurellement équivalent à une cystéine dont on a remplacé l'atome de soufre par du sélénium. Elle se distingue des autres acides aminés puisqu’elle possède sa propre synthétase qui sert à convertir la sérine en Sec alors que le résidu est déjà fixé à l’ARNt. La position d’une Sec sur l’ARNm est indiquée par le codon UGA étant habituellement un signal STOP introduisant le concept de recoding. Grâce à une machinerie métabolique spécifique à l'ARNtSec et à la présence d’un SecIS (Selenocystein Insertion Sequence) sur l’ARNm, ce codon permet la présence d'une Sec dans la protéine. Il est connu que la synthèse débute avec l’acétylation de l’ARNt[Ser]Sec par la seryl-ARNt synthétase (SerRS) afin de donner la seryl-ARNt[Ser]Sec. Cette dernière est subséquemment phosphorylée par l’O-phosphoséryl-ARNt[Ser]Sec kinase (PSTK) qui donnera l’O-phosphoséryl-ARNt[Ser]Sec. Par la suite, un complexe de plusieurs protéines et cofacteurs, agissant comme machinerie pour l’incorporation des Sec durant la traduction, s’associe avec l’ARNt[Ser]Sec puis l’ARNm et, finalement, les composantes du ribosome. Parmi ces protéines, SepSecS catalyse l’étape finale de la synthèse des Sec en convertissant le O-phosphoseryl-ARNt[Ser]Sec en selenocysteinyl-ARNt[Ser]Sec utilisant le sélénophosphate comme source de sélénium. Des études récentes montrent que l’association avec SECp43 serait nécessaire pour que SepSecS joue son rôle et soit ségrégée au noyau pour s’associer à la machinerie de biosynthèse des sélénoprotéines, soit le complexe moléculaire qui reconnaît le codon UGA. Parmi les protéines de la machinerie de biosynthèse des sélénoprotéines que nous avons analysées, il y a eEFSec, RPL30, SPS2, SPS1, SBP2 et NSEP1. Nos résultats d’analyse de la dynamique de l’interaction entre les constituants de la machinerie de biosynthèse et d’incorporation des Sec, confirment plusieurs données de la littérature, mais remettent en question le modèle jusqu’à maintenant établi. Une meilleure compréhension de la dynamique des interactions entre ses constituants et la régulation de cette dynamique permet d’émettre des hypothèses quant au rôle de la machinerie de biosynthèse des sélénoprotéines et de l’importance de sa complexité. Nous avons analysé les interactions in vivo dans des cellules HEK293T au moyen de la technique de Protein-Fragment Complementation Assay (PCA) en couplant, par un clonage moléculaire, les gènes de chacune des protéines d’intérêt avec des fragments des gènes de la protéine luciférase (hRluc). Nous avons ainsi réalisé une fusion en N-terminal et en C-terminal des fragments de luciférase pour chacune des protéines d’intérêt. Puis, nous avons analysé la dynamique des interactions avec les composantes de la machinerie de biosynthèse des Sec. D’autres travaux seront essentiels afin de bâtir sur les résultats présentés dans cette recherche. / Selenoproteins are proteins that incorporate selenocysteines, which is called the 21st amino acid, during their translation. Specifically, selenocysteine (Sec) is a metabolic derivate of serine, which is structurally equivalent to Cys except for replacement of sulfur with an atom of selenium in the δ-position. It differs from other amino acids since a unique synthetase converts the serine into Sec while the residue is already attached to the tRNA. The codon for Sec on the mRNA is a UGA codon that is usually a STOP signal, introducing the concept of "recoding". Through a specific metabolic machinery for the tRNASec and the presence of a SecIS (Selenocysteine Insertion Sequence) on the mRNA, this codon allows the incorporation of the Sec into the protein. However, the mechanism of biosynthesis of this amino acid and its incorporation into proteins is not well understood. It is known that the synthesis starts with the acetylation of tRNA[Ser]Sec by seryl-tRNA synthetase (SerRS) to give the seryl-tRNA[Ser]Sec. The latter is subsequently phosphorylated by the O-phosphoseryl-tRNA[Ser]Sec kinase (PSTK) which will generate the O-phosphoseryl-tRNA[Ser]Sec. Subsequently, a large complex of several proteins and cofactors acting as machinery for incorporation of Sec during translation, associates with tRNA[Ser]Sec and the mRNA and finally, the components of the ribosome. Among these proteins, SepSecS catalyzes the final step in the biosynthesis of Sec converting O-phosphoseryl-tRNA[Ser]Sec into selenocysteinyl-tRNA[Ser]Sec using monoselenophosphate as a source of selenium. Recent studies showed that the association with SECp43 would be required for SepSecS to play its role to segregate into the nucleus to be associated with the machinery that recognizes the UGA codon. Among the proteins of the biosynthesis machinery of selenoproteins that we analyzed, there are eEFSec, RPL30, SPS2, SPS1, SBP2 and NSEP1. Results of analysis of the dynamics of the interaction between the components of the Sec biosynthetic machinery confirm some data from the literature, but conflict with the model so far established. A better understanding of the dynamics of interactions between its constituents and the reaction of this process would allow us to make assumptions about the role of the biosynthetic machinery of selenoproteins and the importance of its complexity. We analyzed the dynamics of interaction in vivo in HEK293T cells using a Protein-Fragment Complementation Assay (PCA) based on a humanized Renilla luciferase (hRLuc) by coupling, by molecular cloning, genes encoding each protein of interest with gene encoding fragments of the luciferase protein (hRluc). We have thus achieved an expression of fusion of N-terminal and C-terminal fragments for each luciferase protein of interest. Then, we analyzed the dynamics of the interaction with the components of the Sec biosynthetic machinery. Further work will be essential to build on the results presented in this research.

This thesis deals with the possibilities of using television series `Friends' in teaching English on B2 level to further linguistic and communicative competences of the students. The purpose of this thesis was to find out, whether a systematic use of the series, as a motivation to the students, for sparking a discussion or conversation among them or as means of immersion in the language and acquisition of the language, would be possible in a high school English teaching environment for a prolonged period of time. The thesis also debates the advantages and disadvantages of using series, compared to the advantages and disadvantages of using different multimedia. The thesis contains a list of activities that have been used during the testing of the series and several ideas on their modification.

Apesar de o Brasil ser o país com a maior comunidade japonesa fora do Japão, ainda há poucos estudos sobre a aquisição e aprendizagem do português por falantes japoneses. Partindo da descrição do sistema silábico da língua portuguesa (CÂMARA JR., 1970; FERREIRA NETTO, 2001; CRISTÓFARO SILVA, 2009; CAGLIARI, 2007; CAVALIERE, 2005) e da língua japonesa (SHIBATANI, 1987; ITÔ, 1986; McCAWLEY, 1968; HINDS, 1986), pretende-se observar por meio da Análise de Erros (CORDER, 1967) quais as estratégias utilizadas por falantes japoneses em processo de aprendizagem da língua portuguesa para pronunciar duas estruturas silábicas que não existem em sua língua materna: sílabas CVC terminadas em /r/ ou /s/, e sílabas com mais de uma consoante pré-vocálica do tipo CCV, com /r/ ou /l/ ocupando a segunda posição de ataque. A partir dessa observação, busca-se determinar quais dessas estruturas representam maior dificuldade para o aprendiz japonês. Para a composição do corpus, foram criados dezenove nomes fictícios com as estruturas silábicas em questão e sete informantes foram gravados. Ainda que não tenha sido uma pesquisa quantitativa, por meio da comparação dos resultados foi possível verificar a maior facilidade de produzir sílabas CVC em relação às CCV e, para a maioria, o número de acertos foi maior com a consoante /s/ em posição de coda e /r/ na segunda posição de ataque complexo. Quanto à estratégia utilizada, o uso de inserção vocálica foi maior que o de apagamento, exceto quando /r/ ocupa a posição de coda. A pesquisa mostrou que a dificuldade maior ou menor do aprendiz pode ser entendida a partir de processos fonológicos que acontecem na L1, no caso a língua japonesa. / Although Brazil is the country with the largest Japanese community outside Japan, there are few studies about Portuguese acquisition and learning by Japanese speakers. Based on the description of the syllabic system of the Portuguese language (CÂMARA JR., 1970; FERREIRA NETTO, 2001; CRISTÓFARO SILVA, 2009; CAGLIARI, 2007; CAVALIERE, 2005) and of the Japanese language (SHIBATANI, 1987; ITÔ, 1986; McCAWLEY, 1968; HINDS, 1986), we intend to observe through Error Analysis (CORDER, 1967) the strategies used by Japanese learners of Portuguese to pronounce two syllable structures that do not exist in their native language: CVC syllables closed by /r/ or /s/ and CCV syllables with /r/ or /l/ in the second onset position. From this observation, we seek to determine which of these structures represents more difficulty for Japanese learners. To compose the corpus, nineteen fictitious names with the syllabic structure in question were created and seven informants were recorded. Although it has not been a quantitative research, by comparing the results we could verify that it was easier to produce CVC syllables than CCV ones. In addition, for most of the informants, the number of correct production was higher with the consonant /s/ in coda position and /r/ in the second onset position. For the strategy used, the use of vowel insertion was higher than deletion, except when /r/ occupies the coda position. Research has shown that the greater or lesser difficulty of the learner can be understood from phonological processes that occur in L1, in this case the Japanese language.

Apesar de o Brasil ser o país com a maior comunidade japonesa fora do Japão, ainda há poucos estudos sobre a aquisição e aprendizagem do português por falantes japoneses. Partindo da descrição do sistema silábico da língua portuguesa (CÂMARA JR., 1970; FERREIRA NETTO, 2001; CRISTÓFARO SILVA, 2009; CAGLIARI, 2007; CAVALIERE, 2005) e da língua japonesa (SHIBATANI, 1987; ITÔ, 1986; McCAWLEY, 1968; HINDS, 1986), pretende-se observar por meio da Análise de Erros (CORDER, 1967) quais as estratégias utilizadas por falantes japoneses em processo de aprendizagem da língua portuguesa para pronunciar duas estruturas silábicas que não existem em sua língua materna: sílabas CVC terminadas em /r/ ou /s/, e sílabas com mais de uma consoante pré-vocálica do tipo CCV, com /r/ ou /l/ ocupando a segunda posição de ataque. A partir dessa observação, busca-se determinar quais dessas estruturas representam maior dificuldade para o aprendiz japonês. Para a composição do corpus, foram criados dezenove nomes fictícios com as estruturas silábicas em questão e sete informantes foram gravados. Ainda que não tenha sido uma pesquisa quantitativa, por meio da comparação dos resultados foi possível verificar a maior facilidade de produzir sílabas CVC em relação às CCV e, para a maioria, o número de acertos foi maior com a consoante /s/ em posição de coda e /r/ na segunda posição de ataque complexo. Quanto à estratégia utilizada, o uso de inserção vocálica foi maior que o de apagamento, exceto quando /r/ ocupa a posição de coda. A pesquisa mostrou que a dificuldade maior ou menor do aprendiz pode ser entendida a partir de processos fonológicos que acontecem na L1, no caso a língua japonesa. / Although Brazil is the country with the largest Japanese community outside Japan, there are few studies about Portuguese acquisition and learning by Japanese speakers. Based on the description of the syllabic system of the Portuguese language (CÂMARA JR., 1970; FERREIRA NETTO, 2001; CRISTÓFARO SILVA, 2009; CAGLIARI, 2007; CAVALIERE, 2005) and of the Japanese language (SHIBATANI, 1987; ITÔ, 1986; McCAWLEY, 1968; HINDS, 1986), we intend to observe through Error Analysis (CORDER, 1967) the strategies used by Japanese learners of Portuguese to pronounce two syllable structures that do not exist in their native language: CVC syllables closed by /r/ or /s/ and CCV syllables with /r/ or /l/ in the second onset position. From this observation, we seek to determine which of these structures represents more difficulty for Japanese learners. To compose the corpus, nineteen fictitious names with the syllabic structure in question were created and seven informants were recorded. Although it has not been a quantitative research, by comparing the results we could verify that it was easier to produce CVC syllables than CCV ones. In addition, for most of the informants, the number of correct production was higher with the consonant /s/ in coda position and /r/ in the second onset position. For the strategy used, the use of vowel insertion was higher than deletion, except when /r/ occupies the coda position. Research has shown that the greater or lesser difficulty of the learner can be understood from phonological processes that occur in L1, in this case the Japanese language.