1,758,250 research outputs found
Letter from Patricia Baek to Bob Schieffer
No full textLetter to Bob Schieffer from Patricia Baek thanking him for speaking at his school, April 28, 1966.https://mavmatrix.uta.edu/specialcollections_schieffervietnamwar/1655/thumbnail.jp
Hoki Baek
No full text학위논문(박사)--아주대학교 일반대학원 :컴퓨터공학과,2014. 2DoctoralIn wireless networks with a large propagation delay, multiple access schemes should consider the effect of the propagation delay, as it is not negligible and affects network performance significantly. In terrestrial networks, a guard time length is very small owing to negligible propagation delay. On the other hand, in airborne networks and underwater networks, a guard time length is large to prevent collisions owing to large propagation delay. However, the guard time becomes large waste and degrades network performance such as link utilization, throughput, and packet delay. Therefore, reducing the guard time is very challenging in wireless networks with a large propagation delay.
Before reducing the guard time, network topology should be considered because the performance of multiple access scheme is significantly affected by the network topology. In this dissertation, two types of networks are considered according to requirements derived from practical wireless networks with a large propagation delay. Firstly, a single-hop centralized network, in which all nodes are connected to one coordinator and transmit their packet to the coordinator through a randomly accessed channel, is considered. Secondly, a single-hop decentralized network, in which there is no central node and each node broadcasts a packet to all of the other nodes, is considered.
For single-hop centralized networks, a random access scheme based on Slotted ALOHA (S-ALOHA) was studied. General S-ALOHA requires large guard time which causes lower normalized throughput. To reduce the large guard time, an existing scheme uses a time alignment mechanism based on the propagation delay. However, it assumed that propagation delay is known and did not consider acknowledgment. If the immediate acknowledgment is used, the effect of the propagation delay becomes twice. The efficient acknowledgment scheme is also required. Unlike the existing scheme, the proposed scheme does not require the assumption related to propagation delay. Instead, it has a framed structure starting with a beacon signal for supporting periodic propagation delay estimation. When all nodes randomly access a channel and transmit packet to coordinator, the guard time can be reduced based on the estimated propagation delay. Moreover, the beacon signal can also be used for acknowledgment. Numerical results from analytical model constructed show that the proposed scheme provides higher normalized throughput than the existing schemes.
For single-hop decentralized networks, a distributed TDMA scheme was studied. In general, a large guard time is required to ensure broadcasting in TDMA networks with large propagation delay. This degrades link utilization. Thus, adaptive guard time control scheme and its MAC protocol are proposed to increase link utilization while ensuring broadcasting. For this, a time slot owner estimates propagation delay to its next time slot owner by exchanging timing information and adaptively adjusts its guard time based on that propagation delay. Moreover, the proposed schemes provide a distributed mechanism for propagation delay estimation and adaptive guard time control because there is no coordinator in decentralized networks. Numerical results and simulation results from analytical model and simulation model show that the proposed schemes provide higher link utilization than the existing scheme
Keratin 8 Attenuates Necrotic Cell Death by Facilitating Mitochondrial Fission-mediated Mitophagy. Baek et al.
No full textHere you can find raw data to generate figures of the paper: "CKeratin 8 Attenuates Necrotic Cell Death by Facilitating Mitochondrial Fission-mediated Mitophagy"
Keratin 8 Attenuates Necrotic Cell Death by Facilitating Mitochondrial Fission-mediated Mitophagy. Baek et al.
No full textHere you can find raw data to generate figures of the paper: "CKeratin 8 Attenuates Necrotic Cell Death by Facilitating Mitochondrial Fission-mediated Mitophagy"
Keratin 8 Attenuates Necrotic Cell Death by Facilitating Mitochondrial Fission-mediated Mitophagy. Baek et al.
No full textHere you can find raw data to generate figures of the paper: "Keratin 8 Attenuates Necrotic Cell Death by Facilitating Mitochondrial Fission-mediated Mitophagy"
Keratin 8 Attenuates Necrotic Cell Death by Facilitating Mitochondrial Fission-mediated Mitophagy. Baek et al.
No full textHere you can find raw data to generate figures of the paper: "CKeratin 8 Attenuates Necrotic Cell Death by Facilitating Mitochondrial Fission-mediated Mitophagy"
Southern Minnesota Rural Transit Origin, Destination, and Reservation Data (The ODR Data)
No full textThe project team requested transit agencies to conduct a manual data collection to retrieve each ride's origin, destination, and reservation-related information. The transit agencies were given two different standardized worksheets for two groups of transit service types (1: demand-responsive transit (DRT), route deviations, and some ADA paratransit; 2: fixed route buses). Agencies were asked to collect as many features as possible, considering their operational constraints, and not to compromise the safety and quality of their services. Data collection activity for each feature varied on the existing systems of each agency. In some cases, reservation call receptionists or vehicle drivers manually collected certain features, while in others, data administrators pulled data from their agency’s automated storage systems. For the fixed route bus data collection (conducted only for the pre-deployment phase), bus drivers surveyed the alighting locations of every boarding passenger at each stop. The timestamps of boarding and alighting activities of the fixed routes are attached later using the vehicle trip identifier and predefined timetables. The pre-deployment phase was 2023-01-23 to 2023-02-12, and the post-deployment phase was 2023-10-16 to 2023-10-21.The ODR data provides detailed observations of six Southern Minnesota Transit Agencies' trip reservations and actual trips over two one-week periods, spanning both pre- and post-MaaS deployment phases. The collected features for the reservation-based services — demand-responsive transits, some ADA paratransits, and route deviations — included the following: date and time of phone call (ride requests) received or reservation reception time (RRT or call-in time), the request’s intended trip date, preferred departure time (PDT), scheduled departure time (SDT), actual pick-up time (APT), actual drop-off time (ADT), origin & destination (OD), fare type (cash, token, etc.), service type (paratransit, student, etc.), and some information on trip cancellations. On the other hand, the collected features for the fixed route buses include the number of boarding and alighting activities for each bus stop and the inferred timestamps. Some measures were taken to mask sensitive information.Federal Transit Administration - Accelerating Innovative Mobility (AIM) Challenge GrantKhani, Alireza; Baek, Kwangho. (2024). Southern Minnesota Rural Transit Origin, Destination, and Reservation Data (The ODR Data). Retrieved from the Data Repository for the University of Minnesota (DRUM), https://doi.org/10.13020/yhg3-qh31
Implementasi manajemen pembelajaran PAI di SMP Negeri 1 Ranto Baek Kecamatan Ranto Baek Kabupaten Mandailing Natal
Get PDFImplementasi manajemen pembelajaran guru Pendidikan Agama Islam di SMP Negeri 1 Ranto Baek dalam mengimplementasikan perencaan, pelaksanaan dan evaluasi pembelajaran belum dapat dikatan baik dalam pelaksanaannya seperti dalam proses manajemen pembelajaran serta guru yang memiliki kendala dalam mengatasi pelaksanaan manajemen pembelajaran seperti kesulitan dalam mengelola kelas dan kesulitan dalam mengatasi siswa yang memiliki tingkah laku yang berbeda-beda.
Rumusan masalah dalam penelitian ini yaitu Bagaimana implementasi perencanaan, pelaksanaan, serta evaluasi pembelajaran di SMP Negeri 1 Ranto Baek Kecamatan Ranto Baek Kabupaten Mandailing Natal, serta apa saja kendala yang dihadapi guru PAI dalam pelaksanaan manajemen pembelajaran di SMP Negeri 1 Ranto Baek Kecamatan Ranto Baek Kabupaten Mandailing Natal.
Metode Penelitian ini menggunakan metode kualitatif dekskriftif, teknik pengumpulan data melalui observasi, wawancara, dan dokumentasi. Sumber data penelitian ini diperoleh dari data primer dan sekunder. Data primernya adalah kepala sekolah, guru PAI dan peserta didik, data sekundernya yaitu buku-buku, jurnal, dan penelitian yang relevan. Teknik pengolahan dan analisis data penelitian ini menggunakan pendekatan kualitatif yaitu penelitian yang dilakukan dengan mengamati fenomena disekitarnya. Untuk menjamin keabsahan data penelitian ini digunakan teknik triangulasi.
Hasil penelitian menunjukkan bahwa, implementasi manajemen pembelajaran guru Pendidikan Agama Islam di SMP Negeri 1 Ranto Baek Kecamatan Ranto Baek Kabupaten Mandailing Natal, dalam hal perencanaaan menyiapkan perangkat pembelajaran seperti RPP dan silabus sebagai pedoman pembelajaran, kemudian dalam hal pelaksanaan dimulai dengan kegiatan pendahuluan, kegiatan inti, dan di akhiri dengan kegiatan penutup, pada tahap penilaian/evaluasi pembelajaran ditemukan bahwa guru Pendidikan Agama Islam masih lebih menekankan aspek pengetahuannya (kognitif) daripada sikap (afektif), sehingga penilaiannya belum dilakukan secara berimbang antara aspek pengetahuan, keterampilan dan sikap. Serta Kendala yang dihadapi guru Pendidikan Agama Islam dalam melaksanaam manajemen pembelajaran seperti dalam mengelola kelas dengan baik yaitu guru mengalami kesulitan dalam mengelola kelas dikarenakan jumlah siswa yang yang terlalu banyak sehingga kelas susah untuk di kuasai, serta guru yang memiliki kendala dalam mengatasi siswa tingkah laku siswa yang berbeda-beda, seperti siswa yang memiliki latar belakang yang berbeda beda seperti siswa yang malas belajar, ribut di kelas dan lain-lain
Flora of Mt. Baek-am-san
No full textMt. Baek-am is located near east Sea of Ul-Jin gun of Kyong-sang-buk-do. The winter mean temperature 5℃ was higher than that of the same latitude inland areas. Major vegetation was Pinus densiflora-Quercus mongolica community. It was thought that the forest of Mt. Baek-am was disturbed by anthropogenic activity such as the visitation of hot spring and forest fire. Total vascular plants were recorded as 58 families, 125 genera and 164 species, and these numbers were lower than those of Mt. Jum-bong and Mt. Doo-ta located at the Tae-baek Mountains of Kangwon-do province. Two taxa, Lilium cerrum Korn. and Vaccinium koreanum Nakai as endemic taxa to Korea were recorded here. Especially the rare and endagered plants registered to the Ministry of Environment in Korea government were Lilium cernum Kom. and Wisteria floribunda (Willd.) DC. from this area
Baek followed his dream to Swinburne
No full textSouth Korean, Baek is pursuing his childhood dream of working in the aviation industry by studying at Swinburne
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