bluuebunny/crossref_metadata_2025 huggingface dataset:
A system of feed-forward cerebellar circuits that extend and diversify sensory signaling
Authors: Hariani Harsh N. , Brynn Algstam A. , Candler Christian T. , Witteveen Isabelle F. , Sidhu Jasmeen K. , Balmer Timothy S.
Published: November 2023

Sensory signals are processed by the cerebellum to coordinate movements. Numerous cerebellar functions are thought to require the maintenance of a sensory representation that extends beyond the input signal. Granule cells receive sensory input, but they do not prolong the signal and are thus unlikely to maintain a sensory representation for much longer than the inputs themselves. Unipolar brush cells (UBCs) are excitatory interneurons that project to granule cells and transform sensory input into prolonged increases or decreases in firing, depending on their ON or OFF UBC subtype. Further extension and diversification of the input signal could be produced by UBCs that project to one another, but whether this circuitry exists is unclear. Here we test whether UBCs innervate one another and explore how these small networks of UBCs could transform spiking patterns. We characterized two transgenic mouse lines electrophysiologically and immunohistochemically to confirm that they label ON and OFF UBC subtypes and crossed them together, revealing that ON and OFF UBCs innervate one another. A Brainbow reporter was used to label UBCs of the same ON or OFF subtype with different fluorescent proteins, which showed that UBCs innervate their own subtypes as well. Computational models predict that these feed-forward networks of UBCs extend the length of bursts or pauses and introduce delays—transformations that may be necessary for cerebellar functions from modulation of eye movements to adaptive learning across time scales.The cerebellum is essential for the accurate performance of behaviors ranging in complexity from stabilizing an image on the retina to playing a piano or performing a gymnastics routine. Cerebellar dysfunction disrupts the ability to produce smooth movements and leads to a disorder called ataxia. Damage to the vestibular cerebellum occurs in various disorders including medulloblastoma and leads to nystagmus, involuntary movements of the eyes that prevent normal vision. Treating disorders of motor control such as nystagmus, requires a better understanding of how representations of movements are maintained in the firing patterns of neurons in the cerebellar circuit. Here we use transgenic mice to label a type of neuron called the unipolar brush cell and revealed that these cells innervate one another and are likely to increase the length and diversity of spiking patterns in the cerebellum. These transformations may be necessary for numerous functions from controlling eye movements to learning new behaviors.
RIM-BP2 regulates Ca2+ channel abundance and neurotransmitter release at hippocampal mossy fiber terminals
Authors: Miyano Rinako , Sakamoto Hirokazu , Hirose Kenzo , Sakaba Takeshi
Published: November 2023

Synaptic vesicles dock and fuse at the presynaptic active zone (AZ), the specialized site for transmitter release. AZ proteins play multiple roles such as recruitment of Ca2+ channels as well as synaptic vesicle docking, priming, and fusion. However, the precise role of each AZ protein type remains unknown. In order to dissect the role of RIM-BP2 at mammalian cortical synapses having low release probability, we applied direct electrophysiological recording and super-resolution imaging to hippocampal mossy fiber terminals of RIM-BP2 knockout (KO) mice. By using direct presynaptic recording, we found the reduced Ca2+ currents. The measurements of excitatory postsynaptic currents (EPSCs) and presynaptic capacitance suggested that the initial release probability was lowered because of the reduced Ca2+ influx and impaired fusion competence in RIM-BP2 KO. Nevertheless, larger Ca2+ influx restored release partially. Consistent with presynaptic recording, STED microscopy suggested less abundance of P/Q-type Ca2+ channels at AZs deficient in RIM-BP2. Our results suggest that the RIM-BP2 regulates both Ca2+ channel abundance and transmitter release at mossy fiber synapses.
Reconfigurations of cortical manifold structure during reward-based motor learning
Authors: Nick Qasem , Gale Daniel J , Areshenkoff Corson , De Brouwer Anouk , Nashed Joseph , Wammes Jeffrey , Zhu Tianyao , Flanagan Randy , Smallwood Jonny , Gallivan Jason
Published: November 2023

Adaptive motor behavior depends on the coordinated activity of multiple neural systems distributed across the brain. While the role of sensorimotor cortex in motor learning has been well established, how higher-order brain systems interact with sensorimotor cortex to guide learning is less well understood. Using functional MRI, we examined human brain activity during a reward-based motor task where subjects learned to shape their hand trajectories through reinforcement feedback. We projected patterns of cortical and striatal functional connectivity onto a low-dimensional manifold space and examined how regions expanded and contracted along the manifold during learning. During early learning, we found that several sensorimotor areas in the dorsal attention network exhibited increased covariance with areas of the salience/ventral attention network and reduced covariance with areas of the default mode network (DMN). During late learning, these effects reversed, with sensorimotor areas now exhibiting increased covariance with DMN areas. However, areas in posteromedial cortex showed the opposite pattern across learning phases, with its connectivity suggesting a role in coordinating activity across different networks over time. Our results establish the neural changes that support reward-based motor learning and identify distinct transitions in the functional coupling of sensorimotor to transmodal cortex when adapting behavior.
Assembly of neuron- and radial glial-cell-derived extracellular matrix molecules promotes radial migration of developing cortical neurons
Authors: Mubuchi Ayumu , Takechi Mina , Nishio Shunsuke , Matsuda Tsukasa , Itoh Yoshifumi , Sato Chihiro , Kitajima Ken , Kitagawa Hiroshi , Miyata Shinji
Published: November 2023

Radial neuronal migration is a key neurodevelopmental event for proper cortical laminar organization. The multipolar-to-bipolar transition, a critical step in establishing neuronal polarity during radial migration, occurs in the subplate/intermediate zone (SP/IZ), a distinct region of the embryonic cerebral cortex. It has been known that the extracellular matrix (ECM) molecules are enriched in the SP/IZ. However, the molecular constitution and functions of the ECM formed in this region remain poorly understood. Here, we identified neurocan (NCAN) as a major chondroitin sulfate proteoglycan in the mouse SP/IZ. NCAN binds to both radial glial-cell-derived tenascin-C (TNC) and hyaluronan (HA), a large linear polysaccharide, forming a ternary complex of NCAN, TNC, and HA in the SP/IZ. Developing cortical neurons make contact with the ternary complex during migration. The enzymatic or genetic disruption of the ternary complex impairs radial migration by suppressing the multipolar-to-bipolar transition. Furthermore, both TNC and NCAN promoted the morphological maturation of cortical neurons in vitro. The present results provide evidence for the cooperative role of neuron- and radial glial-cell-derived ECM molecules in cortical development.
Unraveling plant-pollinator interactions from a south-west Andean forest in Colombia
Authors: Becoche-Mosquera Jorge Mario , Gomez-Bernal Luis German , Zambrano-Gonzalez Giselle , Angulo-Ortiz David
Published: November 2023

Background

Loss of biological connectivity increases the vulnerability of ecological dynamics, thereby affecting processes such as pollination. Therefore, it is important to understand the roles of the actors that participate in these interaction networks. Nonetheless, there is a significant oversight regarding the main actors in the pollination networks within the highly biodiverse forests of Colombia. Hence, the present study aims to evaluate the interaction patterns of a network of potential pollinators that inhabit an Andean Forest in Totoró, Cauca, Colombia.

Methods

The interactions between plants and potential pollinators were recorded through direct observation in 10 transects during six field trips conducted over the course of one year. Subsequently, an interaction matrix was developed, and network metrics such as connectance, specialization, nestedness, and asymmetry of interaction strength were evaluated by applying null models. An interpolation/extrapolation curve was calculated in order to assess the representativeness of the sample. Finally, the key species of the network were identified by considering degree (k), centrality, and betweenness centrality.

Results

A total of 53 plant species and 52 potential pollinator species (including insects and birds) were recorded, with a sample coverage of 88.5%. Connectance (C = 0.19) and specialization (H2’ = 0.19) were low, indicating a generalist network. Freziera canescens, Gaiadendron punctatum, Persea mutisii, Bombus rubicundus, Heliangelus exortis, Chironomus sp., and Metallura tyrianthina were identified as the key species that contribute to a more cohesive network structure.

Discussion

The present study characterized the structure of the plant-pollinator network in a highly diverse Andean forest in Colombia. It is evident that insects are the largest group of pollinators; however, it is interesting to note that birds form a different module that specializes in pollinating a specific group of plants. On the other hand, the diversity and generality of the species found suggest that the network may be robust against chains of extinction. Nevertheless, the presence of certain introduced species, such as Apis mellifera, and the rapid changes in vegetation cover may affect the dynamics of this mutualistic network. So, it is imperative to apply restoration and conservation strategies to these ecosystems in order to enhance plant-animal interactions and prevent the loss of taxonomical and functional diversity.
El parque como artefacto político: los procesos de politización en la creación de tres parques metropolitanos de la Ciudad de México
Authors: Romero-Magallán Marisol
Published: November 2023

Este artículo analiza los procesos de politización en el contexto de la creación de tres parques metropolitanos de la Ciudad de México. Se abordan el parque Bicentenario, creado en los terrenos de una ex refinería petrolera; el parque La Mexicana, construido en una antigua mina de arena; y la incorporación de un campo militar como la Cuarta Sección del Bosque de Chapultepec. Mediante la documentación y el análisis de los discursos de promotores que impulsaron estos proyectos, se argumenta que el parque se ha utilizado como un artefacto politizante de diversas reivindicaciones sociales y gubernamentales en el marco de las decisiones sobre qué hacer en un terreno vacante de la ciudad. No obstante, estos espacios también han sido movilizados selectivamente utilizando diversas modalidades de despolitización, para intentar neutralizar controversias relacionadas con ellos.
Development of Motorcycle Brake Oil Control System Using Arduino Uno R3 Based Pressure Sensor
Authors: Utapara Anastasia K. , Gunawan A. A. Agung Ngurah , Sandi I. Nengah , Widagda I. Gusti Agung , Suarbawa Komang Ngurah , Ratnawati I. Gusti Agung Ayu
Published: November 2023

An alarm or reminder has been successfully designed to remind us when it is time to fill the brake fluid so as to avoid accidents when riding a motorbike with electronic components which are arranged, including Nex motorbike, Dot-3 brake fluid, Arduino Uno, Psi100 oil pressure sensor, red LED, Step down DC to dc, Resistor 220 0hm. The alarm was designed on the motorbike to serve as a reminder to fill the brake fluid before it decreases. In this research, calibration was carried out on the measuring instrument used so that the output produced by the sensor was the same as the digital measuring instrument, with an accuracy percentage level of 94.11%. The alarm system works when the pressure is low, the pressure sensor will read and process it on the Arduino, after processing the condition will be changed according to the pressure read by the sensor so when it is low the Arduino relay will provide voltage to the LED so that the LED can light up as a warning sign that the brakes are not working. good for use, and vice versa, when the brake fluid is full or meets standards, the relay will not be active and the motorbike will remain stable or can be used as  usual.
Nesting Resource Partitioning of Four Species (Acridotheres tristis, Acridotheres ginginianus, Sturnia pagodarum and Gracupica contra) of Sturnidae Family in Peri-Urban Region of Ajmer City, Rajasthan, India
Authors: Shakshi  , Choudhary Rounak , Sharma Vivek , Dutta Subroto , Chandra Subhash
Published: November 2023

Aims: The study aims to study the resource partitioning and nesting behaviour in four species namely Common Myna, Bank Myna, Brahminy Starling, and Asian Pied Starling nesting in human settlements.

Place and Duration of Study: The study was conducted from January 2022 to July 2023 in peri-urban areas of Ajmer city, Rajasthan, India.

Methodology: Using observations and point-count transects, we examined the nesting preferences, heights, and materials used by these species.

Results: The findings reveal that all four species demonstrated a remarkable adaptability to urban environments by selecting man-made structures as their preferred nesting sites. Common Mynas, in particular, displayed a preference for a variety of human constructions, such as buildings and building cracks, and utilized materials like twigs, straws, plastic, paper, and cotton.

Conclusion: This study highlights the importance of considering wildlife adaptation in urban planning and conservation efforts, as these birds thrive in human-altered landscapes. The nesting behaviors and adaptation of these Sturnidae species in urban environments reveal their ability to coexist with human development. Understanding these interactions is crucial for both avian ecology and urban planning, as it sheds light on the intricate relationships between wildlife and changing landscapes.
Effect of the Combined Nutrient Fertilization on Elephant Foot Yam under Coastal Condition
Authors: Gokul A. P. , Fetricia J. Preethi
Published: November 2023

As the demand for chemical fertilizers has seen a steep upward trend which has resulted in damage of soil as well as human health. Integrated use of chemical fertilizers along with organic manures has been seen as a alternative method to reduce the dependence upon chemical fertilizers. Hence a the field experiment was carried out to study the effect of intergrated nutrient management practices on available nitrogen, phosphorus, potash in soil along with uptake and economics of elephant foot yam (Amorphophallus paeonifolius (Dennst.) Nicolsan) cv. Gajendra. The study was laid out in randomized block design with thirteen  treatments with three replications. Corms were cut into pieces weighing 800 g for planting, dipped in cow dung slurry and placed for drying. After drying, they are placed in the  pits and covered with soil. The treatments comprised of three levels of Farmyard manure (FYM) (20 t ha-1), Vermicompost (5 t ha-1), consortium bio fertilizer (5 Kg ha-1) and organic manures of different combinations. The observations of soil properties were recorded before and after harvesting. From the study it was observed that soil organic content was increased significantly due to the application of organic manures along with biofertilizers, whereas soil physical and chemical properties were unaffected.
Evaluation of Insecticides against Cowpea Sucking Insect Pests in Madhya Pradesh's Gird Region
Authors: Choudhary Suman , Singh P. D. , Mahore Prince , Mahor Dheerendra , Makwana Mitesh
Published: November 2023

During the Kharif season of 2022–2023 at Research Farm, Rajmata Vijyaraje Scindia Krishi Vishwa Vidyalaya, Gwalior, Madhya Pradesh, a field experiment was carried out to assess the effectiveness of seven treatments: T1 - Dimethoate 30 EC (1000 ml); T2 - Imidachloprid 17.8 SL (125 ml); T3 - Acetamiprid 20 SP (125 gm); T4 - Flubendiamide 48 SC (500 ml); T5 – Emamectin benzoate 5 SG (100 gm); T6 – Fipronil 15% SC (2000 ml); and T7 - Un-treated. The observations were made three, seven, and fifteen days after the first and second pesticide sprayings, respectively. The data indicated that Imidachloprid 17.8 SL @ 125ml ha-1 was the most effective insecticide out of the six, and that it was better at controlling the incidence of sucking insects in cowpea, such as aphids (Aphis craccivora (Koch)), thrips (M. distalis (Karny)), whiteflies (A. rachipora (Singh)), and jassids (E. kerri (Pruthi)). However, it was found that Acetamiprid 20 SP was least successful in controlling sucking insects.
EFFECT OF COST INCREMENT DISTRIBUTION PATTERNS ON THE PERFORMANCE OF JIT SUPPLY CHAIN
Authors: Bidiawati J.R Ayu , Mohd Lair Noor Ajian
Published: November 2023

Cost is an important consideration in supply chain (SC) optimisation. This is due to emphasis placed on cost reduction in order to optimise profit. Some researchers use cost as one of their performance measures and others propose ways of accurately calculating cost. As product moves across SC, the product cost also increases. This paper studied the effect of cost increment distribution patterns on the performance of a JIT Supply Chain. In particular, it is necessary to know if inventory allocation across SC needs to be modified to accommodate different cost increment distribution patterns. It was found that funnel is still the best card distribution pattern for JIT-SC regardless the cost increment distribution patterns used.
APLIKASI METODE NEURO-DYNAMIC PADA PROSES PENGENDALIAN PERSEDIAAN DI SEBUAH PERUSAHAAN RETAIL
Authors: Im Manik Ngarap
Published: November 2023

Improper inventory system in terms of cost and customer satisfaction is always the most common problem in every part of industries, and of course, also for retailers. The inappropriateness in setting of orders makes the warehouse overloaded for some kind of goods and lack for the others. To overcome this problem, we proposed to apply the Neuro-Dynamic method for optimizing the composition of goods. This method can be easily implemented using computer program and the result indicates that the overdemand and oversupply problems in that company are solved.

Abstract in Bahasa Indonesia:

Masalah yang sering dihadapi perusahaan retail saat ini antara lain adalah sistem pengendalian persediaan yang kurang tepat, terutama ditinjau dari segi biaya dan kepuasan pelanggan. Hal ini disebabkan karena kuantitas pemesanan yang ditetapkan perusahaan terlalu besar maupun terlalu kecil, sehingga mengakibatkan barang yang disimpan tidak optimal. Untuk menyelesaikan masalah di atas diusulkan dengan menggunakan metode Neuro-Dynamic, yang dapat mengoptimalkan stok barang yang tersedia pada toko, agar biaya yang dikeluarkan minimal dengan menghasilkan keuntungan yang sebesar-besarnya. Untuk memudahkan proses perhitungannya dilakukan dengan program komputer. Hasil pembahasan menunjukkan bahwa perusahaan retail tersebut telah terbantu dalam menjalankan aktivitas perdagangannya, karena tersedianya informasi yang dibutuhkan secara cepat dan cukup akurat dan dapat mengoptimalkan jumlah stok barang yang ada, sehingga mengoptimalkan overdemand dan oversupply.

Kata kunci: pengendalian persediaan, Neuro-Dynamic, optimasi.
PERENCANAAN STRATEGI DALAM UPAYA MENYELARASKAN TUJUAN ORGANISASI DAN TUJUAN KARYAWAN DENGAN PENDEKATAN TOTAL PERFORMANCE SCORECARD (Studi Kasus Departemen Internal Audit Perusahaan Minyak dan Gas Bumi)
Authors: Puslit T. Yuri Zagloel , Yadrifil Yadrifil , Lithrone Lithrone
Published: November 2023

The competition in industry is getting harder, where companies face changes in their environment. So that organization must increase their performance and show their ability to win the competition. This tight competition makes organization has to own innovation where employees grow according to change. In the effort of improving organization performance, it must be an harmony between organization and individual objectives. This research in the oil company Indonesia aims to harmonize it based on Total Performance Scorecard (TPS). This harmonization is done through several phases with the results of a communication among organizational Balance scorecard, scorecard section and Individual Performance plan. These things become a integrated strategic planning of the company. This integrated plan means in the process of planning, it involves departments, sections, and all employees. The advantages are to make sure all employees understand the objective of their departments and their sections, whereas they involve in the process and the implementation of the strategy.

Abstract in Bahasa Indonesia:

Untuk menghadapi persaingan, umumnya kalangan industri terus berupaya untuk melakukan perbaikan dan peningkatan kinerja. Dalam upaya peningkatan kinerja organisasi, keselarasan antara tujuan organisasi dengan tujuan setiap individu yang ada dalam organisasi merupakan hal yang penting. Penelitian di sebuah perusahaan minyak dan gas bumi ini bertujuan untuk menyelaraskan tujuan organisasi dengan tujuan individu dengan menggunakan pendekatan Total Performance Scorecard. Pendekatan ini mempunyai kekhasan yaitu menyelaraskan tujuan organisasi dengan tujuan individu yang tergambar dalam hubungan antara Organizational Balanced Scorecard, Scorecard Section dan rencana kinerja individu. Hubungan tersebut dapat menjadi rancangan strategi yang terintegrasi bagi perusahaan, yang dalam perumusannya melibatkan pihak departemen, seksi, serta seluruh karyawan yang berada didalamnya. Hal ini dapat meningkatkan kepastian bahwa para karyawan mengerti dan mendukung tujuan dari departemen dan seksi tempatnya bekerja, dimana mereka ikut terlibat dalam proses pembuatan dan pelaksanaan strategi tersebut.

Kata kunci: Total Performance Scorecard (TPS), Organizational Balanced Scorecard (OBSC), Personal Balanced Scorecard (PBSC).
PENENTUAN HARGA JUAL HUNIAN PADA APARTEMEN DI SURABAYA DENGAN MENGGUNAKAN METODE REGRESI SPASIAL
Authors: Halim Siana , Anastasia Njo , Eval Agnes , Tobing Aida Fitriani
Published: November 2023

In the modern society, apartments are one of the answers to the need of residential for the citizens due to limited area for landed housing and over crowded city for businesses. Therefore, it will be very interested to investigate the price of appartements, since they are not only influenced by, e.g., physical factors, location, external factor and distance to the central business district, but also they have dependency to the price of other appartements in the neighborhoods. This dependency is called the spatial dependency; to accommodate this dependency to model the price of apartemen by ordinary least square is not enough. Therefore, in this research we used the spatial regresion to model the price of appartements, particularly in Surabaya.

Abstract in Bahasa Indonesia:

Dalam masyarakat modern, apartemen merupakan salah satu jawaban akan kebutuhan tempat tinggal bagi warga kota, karena adanya keterbatasan lahan untuk perumahan dan kota yang padat dengan daerah bisnis. Oleh karena itu sangatlah menarik untuk menginvestigasi harga apartemen, karena mereka tidak hanya tergantung pada, misalnya, faktor fisik, lokasi, faktor eksternal dan jarak ke pusat bisnis, tetapi juga tergantung pada harga apartemen di daerah sekitarnya. Ketergantungan ini disebut dengan ketergantungan spasial. Untuk mengakomodasi ketergatungan ini memodelkan harga jual apartemen dengan menggunakan metode regresi linear biasa tidaklah cukup. Pada penelitian ini, akan digunakan model regresi spasial untuk memodelkan harga apartemen khususnya di Surabaya.

Kata kunci: Ordinary Least Square (OLS), Spatial Regresion, Spatial Auto Regresion (SAR).
MODEL JOINT ECONOMIC LOT SIZE PADA KASUS PEMASOK-PEMBELI DENGAN PERMINTAAN PROBABILISTIK
Authors: Jauhari Wakhid Ahmad , Pujawan I Nyoman , Wiratno Stefanus Eko
Published: November 2023

In this paper we consider single vendor single buyer integrated inventory model with probabilistic demand and equal delivery lot size. The model contributes to the current literature by relaxing the deterministic demand assumption which has been used for almost all integrated inventory models. The objective is to minimize expected total costs incurred by the vendor and the buyer. We develop effective iterative procedures for finding the optimal solution. Numerical examples are used to illustrate the benefit of integration. A sensitivity analysis is performed to explore the effect of key parameters on delivery lot size, safety factor, production lot size factor and the expected total cost. The results of the numerical examples indicate that our models can achieve a significant amount of savings. Finally, we compare the results of our proposed model with a simulation model.

Abstract in Bahasa Indonesia:

Pada penelitian ini akan dikembangkan model gabungan pemasok-pembeli dengan permintaan probabilistik dan ukuran pengiriman sama. Pada model setiap lot pemesanan akan dikirim dalam beberapa lot pengiriman dan pemasok akan memproduksi barang dalam ukuran batch produksi yang merupakan kelipatan integer dari lot pengiriman. Dikembangkan pula suatu algoritma untuk menyelesaikan model matematis yang telah dibuat. Selain itu, pengaruh perubahan parameter terhadap perilaku model diteliti dengan analisis sensitivitas terhadap beberapa parameter kunci, seperti ukuran lot, stok pengaman dan total biaya persediaan. Pada penelitian ini juga dibuat model simulasi untuk melihat performansi model matematis pada kondisi nyata.

Kata kunci: model gabungan, permintaan probabilistik, lot pengiriman, supply chain
MODEL PENENTUAN UKURAN LOT PRODUKSI DENGAN POLA PERMINTAAN BERFLUKTUASI
Authors: Saraswati Docki , Cakravastia Andi , Iskandar Bermawi P. , Halim A. Hakim
Published: November 2023

The purpose of this paper is to examine the impact of varying demand on the production lot size and the schedule of delivery in the integrated inventory system. This system is consisted of a single manufacturer as the supplier and a single buyer. Mostly, the problems on the economic lot size model are assumed that demand is continuous with time. Actually, demand occurs are varying in time rather than continuously over the planning time horizon. In this case, the buyer has decided the amount of order for each period is varied, because of the changing market environment. The integrated inventory system model between a supplier and a buyer are developed and implemented under the condition with varied demand. Forward dynamic programming is implemented for searching the solution. The objective is to minimize the total cost, associated with a single product for a deterministic varying demand. Two conditions are examined here, i.e., the integrated model with uncapacitated and capacitated production system. The difference between these two models is in the constraints formulation. The capacity constraints will give higher total cost, especially if the setup cost higher than the holding cost. A numerical example is presented to illustrate the implementation of the solution algorithm.

Abstract in Bahasa Indonesia:

Pada makalah ini diteliti pengaruh permintaan yang berfluktuasi terhadap penentuan ukuran lot produksi dan jadwal pengiriman pada sistem persediaan terintegrasi, dengan total ongkos persediaan melibatkan sistem persediaan pemanufaktur dan pembeli secara bersama. Sistem terdiri atas pemanufaktur tunggal dan pembeli tunggal untuk pemesanan satu jenis produk.Umumnya permasalahan penentuan ukuran lot produksi memiliki asumsi bahwa permintaan bersifat kontinu terhadap waktu. Penentuan ukuran lot pada model integrasi sistem persediaan antara pemanufaktur dan pembeli dengan kondisi permintaan berfluktuatif bertujuan meminimasi total ongkos. Pencarian solusi penentuan ukuran lot produksi dengan permintaan berfluktuatif mempergunakan pendekatan forward dynamic programming. Adapun model integrasi yang dikemukakan mempertimbangkan dua kondisi, yaitu kondisi kapasitas produksi tidak terbatas dan kapasitas produksi terbatas. Perbedaan formulasi terletak pada kondisi pembatas yang digunakan. Hasil pengamatan menunjukkan bahwa apabila ongkos setup jauh lebih tinggi dari pada ongkos simpan, maka kondisi dengan mempertimbangkan kapasitas akan menghasilkan total ongkos yang lebih tinggi. Suatu contoh numerik diberikan sebagai ilustrasi dari algoritma yang diusulkan.

Kata kunci: ukuran lot produksi, fluktuasi permintaan, jadwal pengiriman, integrasi pemanufaktur-pembeli, programa dinamis.
KOMITMEN DAN KAPABILITAS UNTUK MENINGKATKAN KINERJA REVERSE LOGISTICS
Authors: Sutapa I Nyoman
Published: November 2023

Artikel ini mengkaji pengaruh pengorganisasian dan pemanfaatan teknologi logistic dalam pengelolaan reverse logistics di perusahaan manufaktur penghasil barang/kemasan plastik terhadap kapabilitas inovasi dan komunikasi perusahaan dalam meningkatkan kinerja reverse logistics perusahaan. Analisis yang digunakan adalah Structural Equation Modeling dengan menggunakan program SmartPLS. Hasil penelitian menunjukkan bahwa pengelolaan reverse logistics melalui alokasi anggaran dan pembentukan unit pengelola tersendiri disertai pendayagunaan teknologi, terutama pertukaran data secara elektronik, mampu meningkatkan kapabilitas inovasi, khususnya kemampuan kustomisasi dan fleksibilitas perusahaan dalam meningkatkan kinerja reverse logistics, dalam hal ketepatan waktu dan biaya operasional yang rendah. Di sisi lain, kapabilitas komunikasi belum terbukti dapat memengaruhi kinerja reverse logistics dikarenakan kapabilitas yang dimiliki belum dimanfaatkan secara optimal.
Model of Dynamic Pricing for Two Parallels Flights with Multiple Fare Classes Based on Passenger Choice Behavior
Authors: Rusdiansyah Ahmad , Mariana Dira , Pradana Hilman , Wessiani Naning A.
Published: November 2023

Airline revenue management (ARM) is one of emerging topics in transportation logistics areas. This paper discusses a problem in ARM which is dynamic pricing for two parallel flights owned by the same airline. We extended the existing model on Joint Pricing Model for Parallel Flights under passenger choice behavior in the literature. We generalized the model to consider multiple full-fare class instead of only single full-fare class. Consequently, we have to define the seat allocation for each fare class beforehand. We have combined the joint pricing model and the model of nested Expected Marginal Seat Revenue (EMSR) model. To solve this hybrid model, we have developed a dynamic programming-based algorithm. We also have conducted numerical experiments to show the behavior of our model. Our experiment results have showed that the expected revenue of both flights significantly induced by the proportion of the time flexible passengers and the number of allocated seat in each full-fare class. As managerial insights, our model has proved that there is a closed relationship between demand management, which is represented by the price of each fare class, and total expected revenue considering the passenger choice behavior.
Assessing the Impact of IT Competency on Organizational Learning Capability of Indonesian Manufacturing Firms
Authors: Hasan Alizar
Published: November 2023

This paper attempt to assessing the impact of IT competency on organizational learning capability by using the measurement scale that have been developed by Tippins et al. and Gomes et al. These studies cover a sample of 192 manufacturing firms. IT competencies are classified into three dimensions: IT knowledge, IT operations, and IT objects, and organizational learning capability are classified into four dimensions: Managerial commitment, System perspec-tive, Openness and experimentation, and Knowledge transfer and integration. The result of factor analysis on IT competency and Organizational learning capability show that all items have high loading only on a single factor with ranging from .60 to .84. The findings revealed that IT competency positively and significantly influences the organizational learning capability of Indonesian manufacturing firms.
Pendeteksian Outlier dan Penentuan Faktor-Faktor yang Mempengaruhi Produksi Gula dan Tetes Tebu dengan Metode Likelihood Displacement Statistic-Lagrange
Authors: Makkulau Makkulau , Linuwih Susanti , Purhadi Purhadi , Mashuri Muhammad
Published: November 2023

There are several problems in industrial process for example problems associated with product quality. In statistics, observation which is significantly different to the average is called outlier. The outlier can give significant influence to the result of modeling, which can affect the decision making. This research develops the outlier detection method using the Likelihood Displacement Statistic method, called Likelihood Displacement Statistic-Lagrange (LDL) method. The LDL method is applied to sugar and molasses production data of Djombang Baru Sugar Factory, Jombang, East Java. The result of this research shows that factors influenced the sugar and molasses production are sugar cane with the dirt less than 5%, sugar cane with the dirt between 5% to 7%, sugar cane with the dirt higher than 7%, and imbibition water
A COMPARATIVE STUDY OF FORECASTING MODELS FOR TREND AND SEASONAL TIME SERIES DOES COMPLEX MODEL ALWAYS YIELD BETTER FORECAST THAN SIMPLE MODELS
Authors: Suhartono Suhartono
Published: November 2023

Many business and economic time series are non-stationary time series that contain trend and seasonal variations. Seasonality is a periodic and recurrent pattern caused by factors such as weather, holidays, or repeating promotions. A stochastic trend is often accompanied with the seasonal variations and can have a significant impact on various forecasting methods. In this paper, we will investigate and compare some forecasting methods for modeling time series with both trend and seasonal patterns. These methods are Winter's, Decomposition, Time Series Regression, ARIMA and Neural Networks models. In this empirical research, we study on the effectiveness of the forecasting performance, particularly to answer whether a complex method always give a better forecast than a simpler method. We use a real data, that is airline passenger data. The result shows that the more complex model does not always yield a better result than a simpler one. Additionally, we also find the possibility to do further research especially the use of hybrid model by combining some forecasting method to get better forecast, for example combination between decomposition (as data preprocessing) and neural network model.
UPAYA PENERAPAN PENDIDIKAN KARAKTER BAGI MAHASISWA (Studi Kasus di Jurusan Teknik Industri UK Petra)
Authors: Chrisiana Wanda
Published: November 2023

In some countries, character education has been conducted and became an integrated part of the education system since the early stage. Unfortunately character education in Indonesia has not been fully considered and integrated with formal education system yet. This article will review the importance of character education in formal education system. The review begins with the examples of benefit gained through the implementation of character education in some countries. This article also shows the effort done by the Industrial Engineering Department at Petra Christian University to design and implement an integrated and systematic character education's curriculum for its student.

Abstract in Bahasa Indonesia :

Pendidikan karakter di beberapa negara sudah mendapatkan prioritas sejak pendidikan dasar dimulai. Namun di Indonesia, pendidikan karakter masih dipandang sebagai wacana dan belum menjadi bagian yang terintegrasi dalam pendidikan formal. Artikel ini membahas tentang pentingnya pendidikan karakter dalam sistem pendidikan formal. Dimulai dengan melihat contoh manfaat pendidikan karakter di negara lain seperti Amerika dan Cina. Kemudian, dilanjutkan dengan usaha-usaha yang dilakukan oleh Jurusan Teknik Industri UK Petra untuk merancang pendidikan karakter yang sistematis dan terintegrasi dalam kurikulum bagi mahasiswa sebagai persiapan menuju ke dunia kerja. Usaha tersebut antara lain penetapan pendidikan karakter sebagai salah satu rencana strategis jurusan, penetapan tim, perancangan dan pelaksanaan program pendidikan karakter, evaluasi, serta usaha perbaikan terus menerus.

Kata kunci: pendidikan karakter, perancangan dan pelaksanaan program.
PERANCANGAN PENILAIAN KINERJA KARYAWAN BERDASARKAN KOMPETENSI SPENCER DENGAN METODE ANALYTICAL HIERARCHY PROCESS(Studi Kasus di Sub Dinas Pengairan Dinas Pekerjaan Umum Kota Probolinggo)
Authors: Nurmianto Eko , Siswanto Nurhadi
Published: November 2023

In this research, Worker Performance Appraisal System has been conducted in the Public Worker Council Probolinggo. This research especially conducted in the Sub Public Worker for Low Level Workers, i.e. Contract Workers. So far incentive in this institution was not given based on their performance, but based on the community agreement. Therefore, the worker performance appraisal system was designed based on the competency, namely the Spencer competency. For that purpose the Spencer appraisal Dimension has been integrated to DP3 (Daftar Penilaian Pelaksanaan Pekerjaan) and to the Competencies for the Executive Leadership Development. The results on those criterias were processed using the Expert Choice Software. The weight for the managerial skill is 0.200 and for the technical one is 0.800. Type of managerial skill is indicated by the competency criteria, i.e, discipline, serving, achievement, proactive and commitment to organization. The weights of each criterion are 0.318, 0.289, 0.151, 0.140, 0.102, respectively. On the other hand, Technical skills indicated by competency criteria are leadership and cooperation. Their weights are 0.500, 0.500, respectively. It can be concluded that, the accurate incentive system is an insentive system, based on profit share. This share is given according to the performance appraisal of each worker.

Abstract in Bahasa Indonesia :

Penelitian ini membahas tentang sistem penilaian kinerja karyawan yang dilakukan di Dinas Pekerjaan Umum Kota Probolinggo, khususnya Sub Dinas Pengairan untuk karyawan level bawah (karyawan kontrak). Selama ini pemberian insentif di Sub Dinas tersebut tidak didasarkan atas kinerja karyawan tetapi atas dasar kebersamaan/ gotong royong. Untuk meningkatkannya dirancang sistem penilaian kinerja karyawan berbasis kompetensi, khususnya kompetensi Spencer. Dimensi penilaian Spencer diintegrasikan dengan DP3 dan Competencies for Executive Leadership Development. Kriteria diolah dengan Software Expert Choice. Hasilnya bobot kemampuan karyawan kontrak terbagi atas: kemampuan manajerial (0.200) dan kemampuan teknik (0.800). Kemampuan manajerial terdiri dari: disiplin (0.318), melayani (0.289), berprestasi (0.151), proaktif (0.140), dan komitmen pada organisasi (0.102). Sedangkan kemampuan teknis terdiri dari: memimpin (0.500) dan kerjasama (0.500). Dari penelitian tersebut sistem insentif yang tepat adalah sistem insentif pembagian laba, dimana insentif yang diterima berdasarkan pada peningkatan kinerja karyawan.

Kata kunci: penilaian kinerja karyawan, kompetensi, insentif, analytical hierarchy process.
PENGGUNAAN BOOTSTRAP DATA DEPENDEN UNTUK MEMBANGUN SELANG KEPERCAYAAN PADA PARAMETER MODEL PERAMALAN DATA STASIONER
Authors: Halim Siana , Mallian Herman
Published: November 2023

The Bootstrap is a lively research area. A lot Of ideas are around and have let to quiet different proposals. In this paper we sketch briefly some Bootstrap methods for independent and dependent data. Finally we give an Bootstrap example for constructing confidence interval in the forecasting for stationer data.

Abstract in Bahasa Indonesia :

Bootstrap merupakan area penelitian yang terus berkembang. Ada banyak ide dan proposal-proposal yang berbeda telah diberikan oleh para peneliti. Namun demikian, dalam makalah ini hanya akan diulas secara singkat beberapa metode Bootstrap untuk data independen maupun data dependen. Akhirnya akan diberikan sebuah contoh kasus penggunaan Bootstrap untuk membangun selang kepercayaan pada peramalan data stasioner.

Kata kunci: Bootstrap, resampling, peramalan
FUNGSI-FUNGSI KERNEL PADA METODE REGRESI NONPARAMETRIK DAN APLIKASINYA PADA PRIEST RIVER EXPERIMENTAL FORESTS DATA
Authors: Halim Siana , Bisono Indriati
Published: November 2023

In this paper we discuss some models for estimating the regression function, provided the data Y is given. The programming of these function are presented as well as the "tricks" in the R- programming, a statistical freeware. We applied these models to The Priest River Experimental Forest's data.

Abstract in Bahasa Indonesia :

Dalam paper ini akan diberikan beberapa model untuk mengestimasi fungsi regresi bila sebuah data Y diberikan. Pembuatan fungsi - fungsi estimasti tersebut juga diberikan dengan menggunakan freeware statistik R dan juga diberikan beberapa trik dalam pemrograman. Model-model ini diaplikasikan pada Priest River Experimental Forest's data.

Kata kunci: regresi nonparametrik, smoothing, kernel, R.
KARAKTERISTIK ERGONOMIS RANCANG BANGUN WHEELBARROW
Authors: Monasari Mia , Hadiguna Rika Ampuh
Published: November 2023

A Wheelbarrow is one of manual material handling equipments%2C which often used by many people. From survey%2C there are some problems faced by users%2C e.g.%2C high energy expenditure and risk of injuries. To avoid those particular risks in using a wheelbarrow%2C analysis of factors that affect this energy expenditure and risk of injuries will be needed. An experiment based on Taguchi method has been conducted to achieve the optimum combination of factors that increase energy expenditure rate and decrease the energy expenditure variance. The analysis of body posture shows that the best posture in using a wheelbarrow is when the straight arm in line with vertebrae. The analysis of subjective complaints shos that palm of hands%2C arms%2C shoulders%2C elbows and wrists are the most possible parts of body having risk injuries. Based on these information and analysis%2C a good wheelbarrow is a wheelbarrow that has the distance of man support and wheel axis smaller than 110 cm. The propose design of a new wheelbarrow has these following properties. The horizontal distance beetween weight point an wheel axis is smaller than 26.53 cm%2C the vertical distance beetween weight point and wheel axis is smaller than 32.37 cm and the weight point is stabil at (-13.22 cm ; 14.37 cm) based on the reference point. Moreover%2C it has a feature than can decrease wheelbarrow speed in descend way and decrease the effect of vibrations as well%2C the net weight is smaller than 21%2C6 kg and the support of wheelbarrow is lower than 32.5 cm. Abstract in Bahasa Indonesia : Wheelbarrow merupakan salah satu alat manual material handling yang banyak digunakan masyarakat. Oleh karena itu perlu dilakukan penentuan karakterisik wheelbarrow yang baik yang telah memper¬timbangkan faktor yang paling mempengaruhi konsumsi energi dan kemungkinan cedera untuk mengetahui prioritas perbaikan. Eksperimen dilakukan dengan menggunakan metode Taguchi. Dari analisis posisi tubuh diketahui bahwa posisi tubuh paling baik saat pengangkatan adalah posisi tubuh lurus dengan lengan sejajar tulang belakang. Berdasarkan kuesioner diketahui bahwa keluhan terbanyak responden adalah pada telapak tangan%2C lengan%2C bahu%2C siku dan pergelangan tangan. Berdasarkan informasi-informasi tersebut maka dapat disimpulkan bahwa wheelbarrow yang baik adalah wheelbarrow mempunyai jarak antara tumpuan manusia dengan poros roda yang lebih panjang dari 110 cm%2C mempunyai jarak horizontal titik berat beban terhadap poros yang lebih kecil dari 26%2C53 cm%2C mempunyai jarak vertikal titik berat beban terhadap poros yang lebih kecil dari 32%2C37 cm%2C mempunyai titik berat beban yang stabil (tetap pada (-13%2C22 cm ; 14%2C37 cm) terhadap titik acuan)%2C mempunyai fitur yang dapat mengurangi kecepatan wheelbarrow di jalan menurun%2C mempunyai fitur yang dapat meredam getaran%2C mempunyai berat bersih wheelbarrow yang lebih ringan dari 21%2C6 kg%2C mempunyai tinggi kaki penyangga yang lebih rendah dari 32%2C5 cm. wheelbarrow%2C energy expenditure%2C risk of injuries%2C taguchi methods.
KAPASITAS ANGKAT BEBAN UNTUK PEKERJA INDONESIA
Authors: Santoso Dedik
Published: November 2023

The main objective of this study was to determine the maximum acceptable weight of lift (MAWL) for Indonesian population both males and females. The secondary objective was to develop models to predict the MAWL for Indonesian population based on anthropometric variables (sixteen variables) and job related variables (lifting frequency, lifting height, vertical distance of lift). A total of 80 subjects (female students, female workers, male students, and male workers) were used in this study, 20 people for each group. The subjects performed nine lifting tasks (combination of three frequencies and three lifting heights). Psychophysical methodology was used to determine MAWL. Subjects were asked to perform the lifting tasks with loads as much as they can without straining themselves and with the assumption that they work for eight hours per day. The models were developed using data from 75% of the subjects. The models were validated using the data from the other 25% of the subjects. Testing of the models revealed that general model developed for all subjects predicted lifting capacity as well as the specific models.

Abstract in Bahasa Indonesia :

Tujuan utama dari penelitian ini adalah untuk menentukan MAWL (Maximum Acceptable Weight of Lift) untuk orang Indonesia baik pria maupun wanita. Tujuan lain adalah menyusun suatu model yang bisa dipakai untuk memperkirakan MAWL orang Indonesia berdasarkan variabel anthropometri (16 varabel) dan variabel yang berhubungan dengan pekerjaaan (frekuensi angkatan, tinggi angkatan, jarak vertikal dari angkatan). Ada 80 orang sebagai subyek dalam penelitian ini yang terdiri dari mahasiswi, mahasiswa, pekerja wanita, pekerja pria masing-masing 20 orang. Setiap orang melakukan 9 jenis pekerjaan mengangkat beban (kombinasi antara 3 frekuensi dan 3 ketinggian angkat). Metode yang digunakan dalam menentukan MAWL adalah psychophysical. Dengan metode ini, setiap subyek diminta untuk melakukan pekerjaan mengangkat barang sesuai dengan frekuensi dan tinggi angkatan yang ditetapkan seberat mungkin sesuai dengan kemampuan mereka dengan asumsi bahwa mereka harus melakukan pekerjaan tersebut selama 8 jam setiap hari tanpa memaksa diri sendiri (untuk menghindari terjadinya cedera). Model yang dikembangkan diperoleh dari data 75% subyek sedangkan 25% dari subyek digunakan untuk validasi model tersebut. Dari pengujian model diperoleh bahwa model yang dikembangkan secara umum dapat digunakan secara cukup akurat terhadap model yang dikembangkan untuk masing-masing kelompok subyek.

Kata kunci: anthropometry, tugas mengangkat, populasi Indonesia, kapasitas mengangkat, psychophysical, MAWL.
DESIGN FOR SIX SIGMA
Authors: Ferryanto Liem
Published: November 2023

This article provides a step by step process of executing analytical or computer based Design for Six Sigma using a Sliding Door project as an example. It comprises of identification of Voice Of the Customer (VOC), transformation of VOC to what it is called Critical To Quality characteristics (CTQs), modeling of system transfers function, optimal and robust solutions, and tolerance design approach