IMPLEMENTASI ALGORITMA C 4.5 DALAM PEMBUATAN APLIKASI PENUNJANG KEPUTUSAN PENERIMAAN PEGAWAI CV. DINAMIKA ILMU

Sebuah perusahaan penerbitan dan percetakan perlu mengadakan penerimaan karyawan secara mandiri dilingkungan perusahaan. Kendala yang sering ditemukan dalam proses penerimaan karyawan di sebuah perusahaan yaitu sulitnya menentukan pelamar mana yang memenuhi kriteria untuk menjadi karyawan sesuai keinginan perusahaan dari sekian banyak pelamar sedangkan pelamar yang diterima menjadi karyawan terbatas. Banyaknya variabel yang digunakan dalam penunjang keputusan penerimaan pegawai di sebuah perusahaan seperti pendidikan terakhir, pengalaman kerja yang sudah pernah dijalani, usia calon karyawan, nilai transkip ijazah, nilai test tertulis, dan nilai test wawancara. Sehingga sulit bagi sebuah perusahaan untuk mengelompokkan nilai dari tiap-tiap variabel  sesuai kriteria sebuah perusahaan yang nantinya digunakan sebagai hasil akhir penerimaan pegawai di sebuah perusahaan. Untuk menentukan calon pegawai yang memenuhi kriteria maka dibutuhkan rekomendasi yang tepat. Perekomendasian yang tepat membutuhkan jumlah data yang banyak, Algoritma C4.5 merupakan salah satu metode yang dapat menganalisis data dalam jumlah yang banyak atau biasa disebut data mining. Pada penelitian ini dibuat suatu aplikasi yang mengimplementasikan pohon keputusan dengan algoritma C4.5, data yang digunakan dalam penelitian ini adalah data calon pegawai. Dalam perancangan aplikasi menggunakan diagram kontek, DFD, dan penyajian aplikasi menggunakan Code Gear RAD Studio Delphi 2009 serta database MySQL. Hasil yang dicapai adalah sebuah Aplikasi Penunjang Keputusan Penerimaan Pegawai yang Implementasinya dapat membantu kepala bagian Human Resource Development (HRD) dalam penyeleksian dan penerimaan calon pegawai.Kata Kunci : Algoritma C 4.5, Sistem Penunjang Keputusan,  Data Mining

SISTEM PAKAR DIAGNOSA PENYAKIT PARU PADA ANAK DENGAN METODE CERTAINTY FACTOR

paru akut dinyatakan menjadi penyebab kematian terhadap 1,2 juta anak setiap tahunnya, atau dapat dikatakan setiap jamnya 230 anak meninggal karena penyakit tersebut. Berbagai upaya telah dilakukan oleh pemerintah, diantaranya menyiapkan perangkat kesehatan tetapi upaya itu belum memberikan hasil yang memadai. Salah satu penyebabnya adalah masih terbatasnya tenaga medis bila dibandingkan jumlah penduduk. Oleh karena itu penulis membuat aplikasi sistem pakar untuk menentukan jenis penyakit paru-paru pada anak yang memiliki kepandaian layaknya seorang dokter atau pakar. Sistem pakar ini untuk memberikan informasi tentang penyakit yang diderita, sehingga upaya pengobatan terhadap penderita dilakukan cepat atau lebih dini akan dapat mencegah tingkat kematian anak. Aplikasi ini menggunakan metode Certainty factor (CF), didapatkan nilai kemungkinan jenis penyakit paru-paru anak yang mungkin terjadi. Aplikasi yang dibuat adalah aplikasi berbasis web dan menggunakan MySQL sebagai basisdatanya. Aplikasi ini menghasilkan data gejala,data pengguna, data jenis penyakit paru-paru, data pengetahuan dan laporan data hasil konsultasi. Berdasarkan hasil 10 kasus diagnosa penyakit paru diatas hasil sistem memiliki parameter index tingkat kepercayaan sangat tinggi yaitu dengan skala 0,80-1,00 dan analisa pakar sama dengan hasil sistem, maka dapat disimpulkan sistem pakar menghasilkan hasil pemeriksaan yang sama dengan perhitungan pakar.Kata Kunci: sistem pakar, Certainty factor, paru-paru ana

Temporal shifts in the distribution of murine rodent body size classes at Liang Bua (Flores, Indonesia) reveal new insights into the paleoecology of Homo floresiensis and associated fauna

Liang Bua, the type locality of Homo floresiensis, is a limestone cave located in the western part of the Indonesian island of Flores. The relatively continuous stratigraphic sequence of the site spans the past ∼190 kyr and contains ∼275,000 taxonomically identifiable vertebrate skeletal elements, ∼80% of which belong to murine rodent taxa (i.e., rats). Six described genera are present at Liang Bua (Papagomys, Spelaeomys, Hooijeromys, Komodomys, Paulamys, and Rattus), one of which, Hooijeromys, is newly recorded in the site deposits, being previously known only from Early to Middle Pleistocene sites in central Flores. Measurements of the proximal femur (n = 10,212) and distal humerus (n = 1186) indicate five murine body size classes ranging from small (mouse-sized) to giant (common rabbit-sized) are present. The proportions of these five classes across successive stratigraphic units reveal two major changes in murine body size distribution due to significant shifts in the abundances of more open habitat-adapted medium-sized murines versus more closed habitat-adapted smaller-sized ones. One of these changes suggests a modest increase in available open habitats occurred ∼3 ka, likely the result of anthropogenic changes to the landscape related to farming by modern human populations. The other and more significant change occurred ∼60 ka suggesting a rapid shift from more open habitats to more closed conditions at this time. The abrupt reduction of medium-sized murines, along with the disappearance of H. floresiensis, Stegodon florensis insularis (an extinct proboscidean), Varanus komodoensis (Komodo dragon), Leptoptilos robustus (giant marabou stork), and Trigonoceps sp. (vulture) at Liang Bua ∼60-50 ka, is likely the consequence of these animals preferring and tracking more open habitats to elsewhere on the island. If correct, then the precise timing and nature of the extinction of H. floresiensis and its contemporaries must await new discoveries at Liang Bua or other as yet unexcavated sites on Flores

Development and application of a comprehensive analytical workflow for the quantification of non-volatile low molecular weight lipids on archaeological stone tools

Source determination of use-related residues on prehistoric stone tools is especially challenging, due to issues related to preservation, contamination and the contribution of residues from multiple sources. To increase confidence in this process, an analytical workflow was developed to include: (1) a sampling strategy that retains spatial information of the recovered residues and enables monitoring of environmental contamination; and (2) a sensitive and selective gas chromatography-tandem mass spectrometry (GC-MS/MS) procedure to quantify non-volatile low molecular weight lipids on stone artefacts. This workflow was applied to 14 stone artefacts excavated from deposits at Liang Bua, a limestone cave on the Indonesian island of Flores. These artefacts range in age between ∼14 000 and 1000 years old, and were preliminarily classified as either potentially showing traces of use (n = 7) or not (n = 7) using low magnification microscopy. Residues were sampled by direct solvent extraction off the surface of the artefacts. The aliquots were spiked with internal standards and derivatised. The trimethylsilyl derivatives of 40 saturated fatty acids, sterols, di- and tri-terpenoids and their analogues were quantified using optimised multiple reaction monitoring (MRM) transitions. Six of the potentially used artefacts contained sterols, phytosterols and terpenoids, either individually or in combination, whereas none of these compounds was commonly found on the seven artefacts preliminarily classified as unused. This suggests that these six artefacts may have been used as implements to process resources, and provides scope for further investigation. This workflow can also be adapted for the analysis of other archaeological objects

Combined organic biomarker and use-wear analyses of stone artefacts from Liang Bua, Flores, Indonesia

Organic biomarker and lithic use-wear analyses of archaeological implements manufactured and/or used by hominins in the past offers a means of assessing how prehistoric peoples utilised natural resources. Currently, most studies focus on one of these techniques, rather than using both in sequence. This study aims to assess the potential of combining both methods to analyse stone artefacts, using a set of 69 stones excavated from the cave site of Liang Bua (Flores, Indonesia). Prior to chemical analysis, an initial inspection of the artefacts revealed potential use-wear traces but no visible residues. Gas chromatography mass spectrometry (GC-MS) analysis, including the targeting of 86 lipids, terpenes, terpenoids, alkanes and their analogues, found compounds with plant or animal origin on 27 of the 69 stones. The artefacts were subsequently cleaned, and use-wear analysis identified traces of use on 43 artefacts. Use-wear analysis confirmed traces of use on 23 of the 27 artefacts with potential use-residues that were determined by GC-MS. The GC-MS results were broadly consistent with the functional classes identified in the later use-wear analysis. This inclusive approach for stone artefact analysis strengthens the identifications made through multiple lines of enquiry. There remain conflicts and uncertainties in specific cases, suggesting the need for further refinement and analyses of the relationships between use-wear and residues

Climate, people and faunal succession on Java, Indonesia: evidence from Song Gupuh

Song Gupuh, a partially collapsed cave in the Gunung Sewu Limestones of East Java, Indonesia, contains over 16 m of deposits with a faunal sequence spanning some 70 ka. Major changes in the range of animals represented show the impact of climate change and humans. The Terminal Pleistocene and Early Holocene was a period of maximum biodiversity. Human use of Song Gupuh and other cave sites in the region also intensified significantly from ca. 12 ka, together with a new focus on exploitation of small-bodied species (macaque monkeys and molluscs), the first evidence for import of resources from the coast, and use of bone and shell tools. Human activity, especially after the onset of the Neolithic around 2.6 ka, subsequently contributed to a progressive loss of many species from the area, including tapir, elephant, Malayan bear, rhino and tiger, and this extinction process is continuing. We conclude by discussing the biogeographical significance of Song Gupuh in the context of other sites in Java (e.g. Punung, Wajak) and further afield (e.g. Liang Bua)

A reassessment of the early archaeological record at Leang Burung 2, a Late Pleistocene rock-shelter site on the Indonesian island of Sulawesi

This paper presents a reassessment of the archaeological record at Leang Burung 2, a key early human occupation site in the Late Pleistocene of Southeast Asia. Excavated originally by Ian Glover in 1975, this limestone rock-shelter in the Maros karsts of Sulawesi, Indonesia, has long held significance in our understanding of early human dispersals into \u27Wallacea\u27, the vast zone of oceanic islands between continental Asia and Australia. We present new stratigraphic information and dating evidence from Leang Burung 2 collected during the course of our excavations at this site in 2007 and 2011-13. Our findings suggest that the classic Late Pleistocene modern human occupation sequence identified previously at Leang Burung 2, and proposed to span around 31,000 to 19,000 conventional 14C years BP (~35-24 ka cal BP), may actually represent an amalgam of reworked archaeological materials. Sources for cultural materials of mixed ages comprise breccias from the rear wall of the rock-shelter-remnants of older, eroded deposits dated to 35-23 ka cal BP-and cultural remains of early Holocene antiquity. Below the upper levels affected by the mass loss of Late Pleistocene deposits, our deep-trench excavations uncovered evidence for an earlier hominin presence at the site. These findings include fossils of now-extinct proboscideans and other \u27megafauna\u27 in stratified context, as well as a cobble-based stone artifact technology comparable to that produced by late Middle Pleistocene hominins elsewhere on Sulawesi