Using the system dynamics paradigm in teaching and learning technological university subjets

2nd International Conference on Education and New Learning Technologies

R Gizarte-zientzietarako. Datuen eta eskalen analisia Rcommander-ekin

Datuen analisi kuantitatiboa egin behar duen edonork, gaur egun, aukera zabala du. Programa ugari daude, komertzialak zein doakoak, edozein analisi mota, sinpleena zein konplexuena, egiteko. Programa komertzialen artean, SPSS, SAS, STATISTICA, Systat, Stata edo GenStat aipa daitezke. Programa horiek merkatu osoaz jabetu dira, eta Europako eta Amerikako unibertsitateetan analisi-tresna moduan erabiltzen dira. Programa horiek joan dira, lehenengo bertsioetatik gaurkoetaraino, interfaze grafikoak hobetuz (GUI Graphical User Interfaces) eta analisi-eredu gero eta konplexuagoak erantsiz. Leihoen kudeaketan oinarrituriko testuinguru-menuen eta goitik beherako menuen garapenari esker, programak erabilerrazagoak dira, eta analisi zein eredu formal konplexuenekin lan egiteko aukera izan du erabiltzaileen komunitateak.

Aireztapenen maiztasunaren neurketa bihotz biriketako berpiztean kapnografia erabiliz.

[EN]Hyperventilation, which is common both in-hospital and out-of-hospital cardiac arrest, decreases coronary and cerebral perfusion contributing to poorer survival rates in both animals and humans. Current resucitation guidelines recommend continuous monitoring of exhaled carbon dioxide (CO2) during cardiopulmonary resucitation (CPR) and emphasize good quality of CPR, including ventilations at 8-10 min1. Most of commercial monitors/de- brilators incorporate methods to compute the respiratory rate based on capnography since it shows uctuations caused by ventilations. Chest compressions may induce artifacts in this signal making the calculation of the respiratory rate di cult. Nevertheless, the accuracy of these methods during CPR has not been documented yet. The aim of this project is to analyze whether the capnogram is reliable to compute ventilation rate during CPR. A total of 91 episodes, 63 out-of-hospital cardiac arrest episodes ( rst database) and 28 in-hospital cardiac arrest episodes (second database) were used to develop an algorithm to detect ventilations in the capnogram, and the nal aim is to provide an accurate ventilation rate for feedback purposes during CPR. Two graphic user interfaces were developed to make the analysis easier and another two were adapted to carry out this project. The use of this interfaces facilitates the managment of the databases and the calculation of the algorithm accuracy. In the rst database, as gold standard every ventilation was marked by visual inspection of both the impedance, which shows uctuations with every ventilation, and the capnography signal. In the second database, volume of the respiratory ow signal was used as gold standard to mark ventilation instants since it is not a ected by chest compressions. The capnogram was preprocessed to remove high frequency noise, and the rst di erence was computed to de ne the onset of inspiration and expiration. Then, morphological features were extracted and a decission algorithm built based on the extracted features to detect ventilation instants. Finally, ventilation rate was calculated using the detected instants of ventilation. According to the results obtained in this project, the capnogram can be reliably used to give feedback ventilation rate, and therefore, on hyperventilation in a resucitation scenario.

Kontrapultsazio-baloi uhin-forma errealistak sortzeko tresna.

[EN]In this project has been developed a tool which synthesizes realistic waveforms produced by the intra-aortic balloon pump. In addition the following waveforms have also been synthesized: arterial blood pressure (ABP) waveform, the four variations produced due to timing errors of the balloon and the waveform of the helium gas rapidly shuttling in and out of the balloon chamber. All waveforms are synthesized in synchrony with the balloon's inflation/deflation cycles. A database composed of annotated ECG (Electrocardiogram) normal sinus rhythm records has also been created during the project. In order to facilitate the work, two graphical user interfaces were developed. The first interface allows the selection of the ECG records, which were latter annotated using the second interface. Starting from the newly created annotated database, the different waveforms, mentioned above, were synthesized. In this document, in view of the synthesized waveforms, it can be concluded that the obtained results are satisfactory.

Report on the 1993 IFAC World Congress standards and guidelines session

This brief note reviews five papers which were presented at the 1993 IFAC World Congress, on the theme 'standards and guidelines for computer-aided control engineering (CACE)'. This session was organized as part of the CACE Software Standardization Initiative, a combined effort of the IFAC and IEEE Control System Society committees on standards. The motivation of this report is to note the substantial progress that was made in this initiative, and to provide the basis for further discussion and work. The papers under review were concerned with integrated design environments, the use of the EXPRESS language for defining standard data structures, database management, user interfaces, and the modeling and simulation of hybrid systems.

Evaluation of Setup Procedures on Mobile Devices Based on Users’ Initial Experience

Users’ initial perceptions of their competence are key motivational factors for further use. However, initial tasks on a mobile operating system (OS) require setup procedures, which are currently largely inconsistent, do not provide users with clear, visible and immediate feedback on their actions, and require significant adjustment time for first-time users. This paper reports on a study with ten users, carried out to better understand how both prior experience and initial interaction with two touchscreen mobile interfaces (Apple iOS and Google Android) affected setup task performance and motivation. The results show that the reactions to setup on mobile interfaces appear to be partially dependent on which device was experienced first. Initial experience with lower-complexity devices improves performance on higher-complexity devices, but not vice versa. Based on these results, the paper proposes six guidelines for designers to design more intuitive and motivating user interfaces (UI) for setup procedures. The preliminary results indicate that these guidelines can contribute to the design of more inclusive mobile platforms and further work to validate these findings is proposed.

improving document icon to re-find efficiently what you need

It is common that documents are represented by document icon in graphical user interfaces. The document icon facilitates user to retrieve documents, but it is difficult to distinguish the document from a collection of documents that user have accessed to. Our paper presents a document icon on which the users can add some subjective values and mark. Then we describe a system ex-explorer that users can browser and search the extent document icon. We found that it is easy to re-find the document on which users added some annotation or mark by themselves.

基于混合自动机的Post-WIMP界面的建模

Post- WIMP界面作为继当前的主流界面范式—— WIMP界面后的下一代界面范式 ,它和 WIMP界面有着很大的不同 ,通过使用虚拟现实、语音交互、手势交互等技术 ,它能够提供更加自然高效的交互方式 .然而 ,它却难以构造 .为了有效地构造 Post- WIMP界面 ,在构造之前不考虑实现细节 ,而在一个抽象的层次上描述它是一个较好的方法 .首先 ,分析了 Post- WIMP界面的交互本质 ,交互混合性是 Post- WIMP界面一个最为重要的特点 .从形式化系统的角度分析 Post- WIMP界面 ,通过将 Post- WIMP界面抽象为混合系统能够更为准确和严格地分析Post- WIMP界面的特性 .混合自动机是用于描述混合系统的形式化工具 ,将 Post- WIMP界面建模为一组相互协作的混合自动机 .设计了一基于混合自动机理论的半形式化语言 L EAFF作为 Post- WIMP界面的描述工具 .LEAFF通过结合文本描述和图形描述描述 Post- WIMP界面中的交互行为 ,能够准确地反映交互中的控制关系、时序关系 .给出了对两个典型 Post- WIMP界面——虚拟现实交互和笔式交互的描述实例 ,同时讨论了 Post- WIMP界面中交互并行性的描述、交互实时性的验证和从描述到实际交互系统构造的转换 .