Analysis of FreeRTOS Overheads on Periodic Tasks

Real-Time Operating Systems (RTOS) have their own modules that need to be executed to manage system resources and such modules add overhead to task response times. FreeRTOS is used for experimental purposes since its is a widely used open-source RTOS. This work presents the investigation of two important sources of overhead: Function Tick, a FreeRTOS time marker, and the Context Switch between tasks. In this paper we also describe a model for reducing Tick analysis pessimism due to its temporal variation. Experiments measuring the execution time of Tick and Context Switch on ARM-Cortex M4 microprocessor were made to present the Best-Case Execution Time and the Worst-Case Execution time within a periodic task scenario. Measurements are used to validate the analytic models.

Forensic Analysis of Time Markers of Digital Recordings

The article presents the results of summarizing expert practice on the examination of the features of digital video and sound recordings, which make it possible to determine the time of file creation and date of the recorded events. The author introduces the concept of “time marker” and proposes the classification of time markers in the file name, time attributes, and metadata by form and source of origin. The basic principles of time representation by various file systems are stated. The relationships between different time markers for original records and records made in other ways are analyzed. The article provides examples of using time markers to diagnose the method of making a record.Various types of time markers that are part of the recorded signal are considered. It is shown which of the recorded events can act as time markers. The author also analyses the possibility of dating using astronomical events. Differences between absolute and relative dating are considered concerning the study of audio and video files. Conclusions are drawn about the significance of the study of time markers for diagnosing the method of making a signalogram, performing relative or absolute dating of recorded events, or technological processes of making a signalogram.

Perbandingan Adverbia Penanda Waktu Bahasa Korea dan Bahasa Indonesia

This is a comparative study of Korean and Indonesian language. This study aims to describe the form of time markers adverbs in Korean and Indonesian and also to analyze the differences and similarities of the time markers of Korean and Indonesian language. The simple sentences in Korean are translated into Indonesian by following the Indonesian language rules that apply as objects of analysis. It is found that (1) the adverb form of time marker in Korean and Indonesian has very noticeable differences; (2) the time marker in Korean is adverb but it is not applied in Indonesian language. On the other hand, the time marker in Indonesian is adverb but in Korean, it is only suffix particles.

Realisasi Pronomina dalam Bahasa Mooi: Analisis Tipologi Morfologi

This study on relation of pronouns and affixation discusses about pronouns structure and affixes usage in Mooi language. Pronouns structures in Mooi language include personal pronouns, possessive pronouns, interrogative pronouns and demonstrative pronouns. The pronouns forms in Mooi language recognize gender forms and will experience sound changes if they are side by side with the first, second and third personal pronouns. On the other hand, affixations in Mooi language include preffixes, confixes, time marker confixes and personal confixes. The method used in this research is synchronic descriptif method, and the data collecting technique is spoken and listening technique. The data analysis technique is generalisation analysis technique that include several stages of forms and units determination in the corpus to morphology generalisation examination. ABSTRAKKajian tentang relasi pronomina dan afiksasi ini membahas tentang struktur kata ganti dan penggunaan afiks pada bahasa Mooi. Struktur kata ganti pada bahasa Mooi meliputi pronomina persona, pronomina milik, pronomina penanya dan pronomina penujuk. Bentuk pronomina dalam bahasa Mooi mengenal bentuk gender dan akan mengalami perubahan bunyi apabila berdampingan dengan kata ganti orang ke I, II, dan III. Sedangkan afikasasi pada bahasa Mooi meliputi prefiks, konfiks, konfiks penanda waktu dan konfiks persona. Metode yang digunakan dalam peneltian ini adalah metode deskriptif sinkronis, dengan teknik pengumpulan data adalah teknik cakap dan simak. Teknik analisis data yaitu teknik analisis generalisasi yang meliputi beberapa tahapan dari penentuan bentuk dan satuan dalam korpus sampai pada pemeriksaan generalisasi morfologi.