Threshold Verification Technique for Network Intrusion Detection System

Internet has played a vital role in this modern world, the possibilities and opportunities offered are limitless. Despite all the hype, Internet services are liable to intrusion attack that could tamper the confidentiality and integrity of important information. An attack started with gathering the information of the attack target, this gathering of information activity can be done as either fast or slow attack. The defensive measure network administrator can take to overcome this liability is by introducing Intrusion Detection Systems (IDSs) in their network. IDS have the capabilities to analyze the network traffic and recognize incoming and on-going intrusion. Unfortunately the combination of both modules in real time network traffic slowed down the detection process. In real time network, early detection of fast attack can prevent any further attack and reduce the unauthorized access on the targeted machine. The suitable set of feature selection and the correct threshold value, add an extra advantage for IDS to detect anomalies in the network. Therefore this paper discusses a new technique for selecting static threshold value from a minimum standard features in detecting fast attack from the victim perspective. In order to increase the confidence of the threshold value the result is verified using Statistical Process Control (SPC). The implementation of this approach shows that the threshold selected is suitable for identifying the fast attack in real time.Comment: 8 Pages, International Journal of Computer Science and Information Securit

High-precision calculations of In I and Sn II atomic properties

We use all-order relativistic many-body perturbation theory to study 5s^2 nl configurations of In I and Sn II. Energies, E1-amplitudes, and hyperfine constants are calculated using all-order method, which accounts for single and double excitations of the Dirac-Fock wave functions.Comment: 10 pages, accepted to PRA; v2: Introduction changed, references adde

PEMBELAJARAN MATERI BANGUN RUANG SISI DATAR MENGGUNAKAN SOFTWARE CABRI 3D DI KELAS VIII SMPN 3 LANGSA

Mathematics learning outcomes are one indicator of the effectiveness of mathematics learning. High mathematics learning outcomes indicate that the mathematics learning process is effective. The aim of this research is to find out that the learning outcomes of students taught using Cabri 3D software are better than the learning outcomes of students taught without using Cabri 3D software in class VIII_SMPN3 Langsa. This study uses a quantitative approach. The type of research used is true experimental design with Posttest Only Control Design. The population in this research is all students in class VIII of SMPN_3 Langsa for the 2023/2024 academic year, consisting of 11 classes with a total of 367 students. The sampling technique uses simple random sampling. So,the samples obtained in this research were class VIII-1 students with a total of 30 students and class VIII-2 students with a total of 30 students.The test used in this research is the description test. Based on the research results,the researcher tested the hypothesis in 2 ways,namely the manual method and using SPSS.The results obtained manually were the t_count value=6.688 and the t_table value=1.672 so that the t_count>t_tabel value=6.688>1.672. Then the data obtained from the Independent Sample_T-Test showed that the significant value(2-tailed sig)was 0.000. This value is smaller than 0.05(sig 0.000<0.05),so H0 is rejected and Ha is accepted. So,it can be concluded that the learning outcomes of students taught using Cabri 3D software are better than the learning outcomes of students taught without using Cabri 3D software in class VIII SMPN_3 Langsa.Hasil Belajar matematika merupakan salah satu indikator keefektifan pembelajaran matematika. Hasil Belajar matematika yang tinggi menunjukkan bahwa proses belajar matematika tersebut efektif. . Tujuan Penelitian ini adalah untuk mengetahui hasil belajar siswa yang diajarkan menggunakan software cabri 3D lebih baik dibandingkan hasil belajar siswa yang diajarkan tanpa menggunakan software cabri 3D di kelas VIII SMPN 3 Langsa. Penelitian ini menggunakan pendekatan kuantitatif. Jenis penelitian yang digunakan adalah true experimental design pada Posttest Only Control Design. Populasi dalam penelitian ini yakni seluruh peserta didik kelas VIII SMP Negeri 3 Langsa tahun ajaran 2023/2024 yang terdiri dari 11 kelas dengan jumlah keseluruhan peserta didik 367 peserta didik. Teknik pengambilan sampel dengan menggunakan simple random sampling. Sehingga didapat sampel dalam penelitian ini yakni peserta didik kelas VIII 1 dengan jumlah 30 peserta didik dan peserta didik kelas VIII 2 yang berjumlah 30 peserta didik. Tes yang digunakan dalam penelitian ini adalah tes uraian. Berdasarkan hasil penelitian, peneliti menguji pengujian hipotesis dengan 2 cara, yaitu cara manual dan dengan menggunakan SPSS, hasil yang diperoleh dengan cara manual yaitu didapatkan nilai  dan nilai  sehingga nilai  = 6,688 > 1,672. Kemudian diperoleh data hasil uji Independent Sample T-Test yang didapatkan bahwa nilai signifikan (sig 2-tailed) adalah 0,000. Nilai tersebut lebih kecil dari 0,05 ( sig 0,000 < 0,05), sehingga H0 ditolak dan Ha diterima. Jadi dapat disimpulkan bahwa hasil belajar siswa yang diajarkan menggunakan software cabri 3D lebih baik dibandingkan hasil belajar siswa yang diajarkan tanpa menggunakan software cabri 3D di kelas VIII SMPN 3 Langsa

Influence of built form in urban ventilation assessment of tropical cities with weak wind conditions

Urban ventilation is recognized as effective countermeasure on air pollution and urban heat island, yet most tropical urban areas receive low annual mean wind velocity thus lessening potential for urban ventilation. Effect of built form on resulting mean wind velocity at pedestrian-level was analyzed through computational fluid dynamics (CFD) to assess effectiveness in urban ventilation of tropical cities with weak wind conditions based on three heterogeneous built form of Kampung Baru, Taman Keramat and Pantai Dalam which located in the city of Kuala Lumpur for wind direction from south and west. The urban density for the built form was characterized by using urban packing density parameter of frontal area ratio, ?f and the urban ventilation was assessed based on availability of pedestrian wind which described using wind velocity ratio, VR. Influence of built form in urban ventilation was found to be significant in affecting the mean wind velocity, where magnitude of VR at pedestrian-level was decreasing as the value of ?f of the built form increases. Suggestions to improve urban ventilation design in major development project are provided based on these findings

Regional analysis using the Geomorphoclimatic Instantaneous Unit Hydrograph

International audienceThe construction of design flood hydrographs for ungauged drainage areas has traditionally been approached by regionalisation, i.e. the transfer of information from the gauged to the ungauged catchments in a region. Such approaches invariably depend upon the use of multiple linear regression analysis to relate unit hydrograph parameters to catchment characteristics and generalised rainfall statistics. The concept of the geomorphological instantaneous unit hydrograph (GIUH), in relating the shape and scale of the catchment transfer function to stream network topology and channel characteristics, offers an alternative methodology. GIUH derivation depends upon a series of assumptions, including that of estimating a "characteristic velocity"; these continue to attract attention and debate. However, if this velocity is expressed in terms of the kinematic wave approximation, the peak and time-to-peak of the IUH may be expressed in terms of a group of catchment and channel characteristics and the intensity of rainfall excess, giving the so-called geomorphoclimatic IUH (GCIUH). Previous studies involving the GCIUH have developed a single IUH relating to the total duration of rainfall excess. In this study, the rainfall excess duration was divided into several (equal) time increments, with separate IUHs being generated for each interval. This quasi-linear approach was applied to 105 storm events from nine catchments in the south-west of England, ranging in size from 6 to 420 (km)2 . The results showed that, providing the time interval chosen is fine enough to capture the shape of the runoff hydrographs, a comparable level of goodness-of-fit can be obtained for catchments covering a range of about 1:75 in area. The modified GCIUH approach as described is therefore recommended for further investigation and intercomparison with regression-based regionalisation methods. Keywords: floods; geomorphology; rainfall-runoff modellin